The raw metal is melted using an electric furnace.

Also, based on the variety of stainless steel products required, the stainless steel is further subject to welding and grinding or processed to give further shaping.The raw metal is melted using an electric furnace. Another advantage of Laser fusion welding is, it can be used on metals having different thermal conductivity and melting points. The steps employed in stainless steel manufacture. The stainless steel bars, sheets, wires, plates will be cut to the required sizes using numerous methods such as shearing, blanking, sawing, nibbling, flame cutting, plasma jet cutting, etc.Many stainless steel manufacturers offer cost effective and reliable stainless steel products and processes meeting industry standards. Also, it can be painted using wide variety of colors. Laser fusion welding is well known, which gives very high production output with various types of austenitic stainless steels having different thicknesses.

Similarly, most of these reputed stainless steel manufacturers have highly skilled engineers who can handle all aspects stainless steel flange of stainless steel production processes while ensuring compliance with the industry standards and customer requirements. More specifically, the precision grinding can involve CNC Swiss turning, CNC internal grinding, cylindrical grinding, rotary surface grinding, 5-axis CNC surface grinding, etc. Similarly, precision grinding methods are also used to give attractive look to the stainless steel products. Also, the quality control is monitored right throughout the manufacturing and fabricating process of stainless steel. Sometimes, CNC grinding can be used for small, medium, and large quantities of stainless steel.The semi finished or heated melted steel, passed through giant rollers and formed into bars or wires or plates or sheets.

This laser welding can be very effectively used to cut toughest stainless steel materials without causing much deformation. Laser Fusion Welding of Stainless SteelThe laser fusion welding is the effective process used to produce deep penetration welds with minimum heat effecting the stainless steel. Then the stainless steel formed, are heated and cooled to achieve the required strengths including recommended temperatures. This type of grinding can be used to grind angles, and surfaces.Precision Grinding of Stainless SteelPrecision grinding depends on the type of stainless steel material.Stainless steel is available in a variety of forms, finishes and textures. It is important to note that the heating process may vary according to the type of steel required. Different grades of stainless steel are produced for special applications.

For example, the Laser fusion welding is one of the widely used method of welding stainless steel. In a particular, the low temperature heating produces high tensile strength steel and high temperature heating produces lower tensile strength and tougher steel. The stainless steel is widely used in the manufacturing of domestic and industrial appliances. For example, the heat treatment of stainless steel is carried out to have the intended physical appearance and shape. The types of finishing methods employed are annealing, descaling, buffing, tumbling, sandblasting, wire brushing and pickling.The most important process of finishing is carried out on the stainless steel produced, using various finishing methods. The stainless steel materials and products are popular because of its high resistant to stain and rust or corrosion. The stainless steel is manufactured using numerous processes depending on the type and grade of stainless steel required. For instance, they can provide best laser fusion welding including quality precision grinding services

It could be used even when you go for deep sea diving.

Not only is this watch goes along with all types of attire, it can also be given to someone as a perfect gift because of the unique style. Remember, not only will the new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch be a perfect gift; it will also be a long lasting durable and sturdy watch. Or maybe, you might just not be satisfied with your new watch. The most attractive feature of the Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is the glass type used to cover inner pad – Sapphire Glass. The new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is available at an affordable price of $111. What do you do? You are always free to contact the costumer service of the MyCasualWatches.Have you ever wishes for a watch that will redefine your personality? A watch that is cool, stylish and very attractive to look at? Then, the new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch, brought out by MyCasualWatches.

Though the product is peerless, sometimes, something must just happen to them. You can choose your bracelet. It could be used even when you go for deep sea diving. More over the wristband of the watch could also be adjusted freely.99. All you have to do in order to adjust your time is pull out this knob. This electronic wrist watch has a rubber inner dial pad and a stainless steel watch shell. Another quality of the Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is its water resisting ability. The Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch has the ability to resist water up to approximately 500 meters. Available in the shades of black, the gorgeous looking Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch can be used by one and all, for any occasion. Not just the looks and comfort, but also an accurate time gives significant sales value to this model.

After you make your purchase, the company will ship you the product at the earliest. is an ideal choice for you. On top of this, the bracelet of the new Stainless Steel Waterproof Men Wrist Sport Watch is available in many stunning varieties. Any problem you might have will be taken care instantly. The latest Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is acknowledged as one of the best Wrist type Sport Watches for Men launched in the recent times. The stainless steel outer shell of the new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is quite sturdy and will not allow anything to harm your new wrist watch.

The size of the new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is 43 millimeters/ 1. The Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch comes with hand made indexes, luminescent markers and a very attractive orange second hand. The scratch resist sapphire crystal of the watch will even make you wonder about the allure of your new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch. Are you by any chance worried that your new watch might get destroyed by constantly using it outdoors? Never ever stainless steel seamless pipe manufacturers fear on that count. In addition to this, the new Replica Tag Heuer Aquaracer Exquisite Stainless Steel Waterproof Men Wrist Sport Watch is also equipped with an adjustable time knob. This includes a black rubber strap or a steel bracelet

Under normal operating conditions

Under normal operating conditions, no air bubbles in the killed steel, uniform organization; Because of the low oxygen levels, oxide inclusions in steel is less, high purity, ductile-brittle and aging tend to be small; At the same time, killed steel segregation is small, uniform performance comparison, quality is higher.So the boiling steel is not suitable for manufacturing work under impact load, under the condition of low temperature of welded structure and other important structures.002-0. Rimmed steel carbon content is low, because of no silicon deoxidation, silicon content in steel is low (Si < 0.07%). Boiling steel plate used in the manufacture of various kinds of stamping parts, architecture and engineering structure and some of the less important parts of machine structure. Low alloy steel plate is composed of steel and half killed steel plate.

At the same time because the gas content in steel is more, so the toughness is low, ductile-brittle and aging sensitivity is larger, the welding performance is poor. Rimmed steel outer in boiling liquid steel caused by vigorous agitation under the conditions of crystallization, so the surface of pure, dense, good surface quality, has good plasticity and stamping performance, no big shrinkage cavity, less cutting head, high yield, and the steel production process is simple, less consumption of ferroalloy, steel cost is low. But rimming steel heart of impurity is more, segregation more serious, the organization is not dense, uneven mechanical properties. 2, composed plate Calm steel plate is made of ordinary carbon structural steel killed steel hot rolled steel plates.

Boiling steel plates Boiling steel plate is made of ordinary carbon structural steel pipe rimmed steel hot rolled steel plate. Killed steel is deoxidized steel, steel liquid before pouring with sufficient ferromanganese, ferrosilicon and aluminium deoxidation, liquid steel oxygen content is low (0.,ltd is your best choice for steel plates and carbon steel pipe. Rimmed steel is a steel deoxidized incomplete, only use a certain amount of weak deoxidizer of steel fluid deaeration, liquid steel oxygen content is higher, after the steel ingot mould injection, carbon and oxygen reaction produces a large amount of gas, liquid steel caused by boiling, rimmed steel hence the name. Because of the high strength, superior performance, can save a large amount of steel, reduce the structure weight, its application has more and more widely. Killed steel disadvantage is that the concentration of shrinkage cavity, yield is low, the price is higher. Hunan Great Steel Pipe Co. Therefore, composed of steel wholesale austenitic stainless steel is mainly used in low temperature under impact of artifacts, and other components requiring high strength of welded structure

Although they are all stainless steel

Although they are all stainless steel, the difference is very large. Our family container is enough to reach 304, so if the merchant says that his container is 316, it is fooling you. The lead content of 304 and 316 stainless steel is extremely low and does not cause any harm to the human body, so it is called food stainless steel. Today, I will introduce to you what is the difference between 316 stainless steel and 304?Difference between 304 and 316 stainless steel:1. Both 304 and 316 have added chromium, which has stable chemical properties and basically will not be corroded. It is also used as “marine steel”. If the stainless steel encounters chloride ions, it will cause corrosion, so try to avoid and Contact with salt, sea water, etc. Due to the addition of molybdenum element, 316 stainless steel has a special corrosion-resistant structure and stronger chloride corrosion resistance. Some people use 304 stainless steel as anti-corrosion materials.It also has good resistance to aluminum chloride corrosion.

Be careful not to soak the stainless steel container in salt water for a long time. Therefore, the corrosion resistance of 316 is better when the chloride ion content is higher. Low lead content. The difference in usageBoth 304 and 316 have reached food grade, but 304 stainless steel is usually used in our home appliances and household containers, and 316 stainless steel is generally used for the production of medical equipment tools.Advantages of stainless steel pipe:1.4.Corrosion resistance304 steel is resistant to corrosion by sulfuric acid, phosphoric acid, potassium acid, urea, etc. .I believe that many people now have stainless steel containers in their homes.3.3. It will not rust.How to avoid stainless steel rust?Generally, 304 and 316 stainless steel are not easy to rust.

The price difference316 has molybdenum and nickel added, so the price is a little higher than that of 304.316 has increased corrosion resistance on the basis of 304, which can significantly improve its resistance to intergranular corrosion, oxide stress corrosion, and reduce the tendency to heat during welding. Anti-corrosion.2. Relatively high temperature resistance, 304 and 316 stainless wholesale alloy flange steel are better than ordinary stainless steel, and the high temperature resistance can reach up to 800 degrees, which is suitable for various places.2. Why are stainless steel containers favored by so many people because they will not rust and are very resistant to high temperatures. High toughness, can be processed into different products, and the quality is very good., and is suitable for general water, control gas, wine, milk, CIP cleaning fluid and other occasions with little corrosiveness or no contact with materials. It is also very convenient to clean, but when we buy, we must distinguish between 316 and 304 stainless steel

And for cold-rolled steel pipe.

Hot-rolled seamless steel pipe generally contains low, medium pressure boiler pipe, high pressure boiler pipe, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other steel pipe. And for cold-rolled steel pipe, besides the types mentioned above in the hot rolled seamless steel pipe, it also concludes carbon thin-walled steel pipe, alloy thin-walled pipe, walled stainless steel pipe and special shaped steel pipe.GB seamless steel pipe is divided into two types: hot rolled seamless steel pipe and cold rolled seamless steel pipe.5-75mm. Compared with the hot-rolled seamless steel pipe, the cold-rolled one is with higher dimensional accuracy.

GB Standard for seamless steel pipe: Seamless steel pipe for structural purposes:GB8162-2008;Seamless steel tubes for liquid services: GB8163-20083; Boiler seamless steel pipe: GB3087-2008; High-pressure boiler seamless steel pipe: GB5310-2008 (ST45..8-r type); Fertilizer equipment, high pressure seamless steel pipe: GB6479-1999; Geological drilling seamless steel pipe: YB235-70; Oil drilling seamless steel pipe: YB528-65; Petroleum cracking seamless steel pipe: GB9948-88; Oil drill collar special seamless: YB691-70; Automobile axle seamless steel pipes: GB3088-1999; Seamless steel pipe for ships: GB5312-1999; Drawing cold rolled precision seamless steel pipe: GB3639-1999; various alloy seamless steel pipe 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo.

Cold-rolled seamless steel pipe: the diameter be up to 6mm, wall thickness can be 0. In addition, there are also GB / T17396-1998 (hot rolled seamless steel hydraulic prop), GB3093-1986 (diesel engine with high pressure seamless steel pipe), GB / T3639-1983 (cold drawn or cold rolled precision seamless steel tubes), GB / T3094-1986 (cold drawn special shaped seamless steel tubes), GB / T8713-1988 (hydraulic and pneumatic cylinder with precision internal diameter seamless steel pipe), GB13296-1991 (boiler, heat exchanger with stainless steel seamless pipe), GB / T14975-1994 (structure heat exchanger tube manufacturers seamless steel pipe stainless steel), GB / T14976-1994 (fluid transport stainless steel seamless pipe) GB / T5035-1993 (automobile axle casing seamless steel pipe), API SPEC5CT-1999 (casing and tubing specifications) and so on.Hot-rolled seamless steel pipe: the diameter is generally greater than 32mm, wall thickness 2

rolled high dimensional accuracy

Seamless steel tube and cold rolled (dial) seamless steel tube two kinds.Hot-rolled seamless steel tube general steel pipe, low and medium pressure boiler pipe, high pressure boiler tube, alloy steel, stainless steel stainless steel fitting manufacturers pipe, oil cracking pipe, geological steel pipe and other steel pipe and so on.Cold-rolled (dial) seamless steel tube in addition to general steel tube, low medium pressure boiler pipe, high pressure boiler tube, alloy steel, stainless steel pipe, oil cracking pipe, steel pipe, other include carbon thin wall steel tube, alloy thin wall steel pipes, thin-walled stainless steel tube, steel tube.Generally greater than 32 mm hot rolled seamless steel tube diameter, wall thickness 2.5 75 mm, to 6 mm cold rolled seamless steel tube diameter, the thickness of the wall thickness can reach 0.25 mm, to 5 mm thin wall pipe diameter thickness less than 0.25 mm, cold than hot rolled high dimensional accuracy.As the name implies, the temperature of the rolling piece is high, so the deformation resistance is small, can realize the large deformation quantity.Take the rolling system of steel plate as an example, the thickness of the continuous casting billet is about 230mm, and the thickness is 1 ~ 20mm after roughing and rolling.At the same time, because the thickness of steel plate is smaller than small, the dimension accuracy requirement is relatively low, the plate type problem is not easy to appear, the control convexity is given priority to.For organizations have requirements, generally by controlled rolling cold, open rolling by control of the finishing temperature, finishing temperature and coiling temperature to control the microstructure and mechanical properties of strip steel.General use ASTM A106 seamless steel pipe is made of 10, 20, 30, 35 and 45 high quality carbon steel guitar 16 mn, 5 MNV low alloy structural steel or 40 cr, 30 crmnsi, 45 mn2 and 40 MNB guitar made from hot rolled or cold rolled steel.The seamless pipe made by low carbon steel, such as 10 and 20, is mainly used for flow pipe.The seamless work of medium carbon steel such as 45 and 40Cr is used to make mechanical parts, such as car and tractor parts.Generally use seamless steel tube to ensure strength and pressure flat test.Hot rolled steel pipe in hot rolled state or heat treatment.Cold rolled with heat treatment.

The materials should be checked frequently after storage

The preservatives or other electroplating and packaging used by the steel plant before leaving the factory are important measures to prevent materials from rusting.3). If it is a wilderness, the cement floor is raised by 0.5m, and the stack width should not exceed 2. The principle of stacking is that under stable and safe stacking conditions, it should be stacked according to varieties and specifications, and different types of materials should be stacked separately to avoid confusion and mutual corrosion.2. It is strictly forbidden to store articles corrosive to steel pipes near the stacking position. Different types of steel pipes should be stacked separately to prevent confusion and contact corrosion. The industry is widely used in oil and gas transportation, low-pressure water gas transportation, mining fluid transportation, belt conveyors, automobile drive shafts and other industries.2.8.2).

The channel surface of the steel pipe should not face upward to prevent the accumulated water from rusting. After the surface of ordinary steel pipes are cleaned, no oil is required, but the inner and outer surfaces of high-quality steel pipes, alloy steel, thin-walled pipes, alloy steel pipes, etc.2.7. Small and medium-sized steel pipes, metal wires, steel wires, medium-diameter steel pipes, steel wires and wire ropes can be stored in a well-ventilated material shed, but underlays must be installed. Reasonable stacking, first in first out1. Choose a suitable location and warehouse1. There should be a certain passage between the stacks, the width is usually 0.3. Some small steel pipes, steel strips, silicon steel plates, steel plates, small or thin-walled steel pipes, various types of cold-rolled and cold-drawn steel pipes, and high-priced and easily corrosive metal products can be stocked.5-2 meters.5-0. Similar materials are stacked in the order of storage, and the principle of first in, first out is realized. must be coated with anti-rust oil.1). During transportation and loading and unloading, care should be taken to protect them to extend the storage period of the materials.5m.Longitudinal welded pipe equipment plays an important role in people’s life and work.4).

Do not pile corrosive substances such as acid, alkali, salt, cement, etc.4. can be stacked in the open air.1m; if it is muddy, it must be filled with 0. The angle steel and channel steel in the open air environment should be bent downward, that is, the steel pipe should be downward and erect.2-0. For section steel stacked in the open, there must be wooden mats or stone bars underneath, the stacking surface should be slightly inclined to facilitate drainage, and attention should be paid to the flatness of the material to prevent bending and deformation.5m, and the sand and mud surface is raised by 0. The place and warehouse where steel pipes are stored should be clean, free of water, and far away from factories and mines that produce harmful gases and dust.3. Keep the warehouse clean and strengthen material maintenance. China Stainless Steel (Alloy) Fittings Suppliers Petroleum, metallurgy, construction, coal, ports, machinery, etc. The stack height for manual operation should not exceed 1. Let us understand the precautions in the maintenance process. The bottom of the pile should be high, strong and flat to prevent the material from being damp or deformed. The bottom is raised, the warehouse is a cement floor, and the height is 0. After forming a hot-rolled steel coil by a forming machine, the steel coil is transformed into a cylindrical shape. If there is rust, please remove the rust layer.5 meters, and the approach road depends on the size of the materials and transportation machinery, usually 1. Weeds and debris should be removed on site to keep steel pipes clean.

The materials should be checked frequently after storage.Mainly as follows:1.7. The high-frequency current skin effect and proximity effect or arc combustion under the flux layer are used for welding, so that the edge of the tube blank is heated and melted under a certain extrusion pressure and finally cooled and formed. The warehouse should be ventilated on sunny days, and closed on cloudy and rainy days, and maintain a proper storage environment.5m. Straight seam steel pipes can be divided into high-frequency straight seam steel pipes (ERW Pipe) and submerged arc welded straight seam steel pipes (LSAW Pipe) according to the production process.6.Straight seam steel pipe is a kind of welded steel pipe.5.3. Choose a warehouse based on geographic 6. Before entering the warehouse, care should be taken to prevent rainwater from getting wet or mixed with impurities, and use different methods to clean contaminated materials according to its performance.2m, the stack height for mechanical operation should not exceed 1. For example, available high-hardness steel wire brushes, cloth, cotton, etc. on the steel pipe in the warehouse.Through the above introduction, I believe everyone has a certain understanding and understanding of the precautions in the maintenance process of ERW straight seam steel pipe.4.7m.9. Large section steel, rails, faded steel plates, large diameter steel pipes, forgings, etc.3-0. The packaging and protective layer of protective materials. But the maintenance of straight seam steel pipes has always been a headache

This tells us that if the stainless steel with weak magnetic

In general, austenitic stainless steel (represented by 304) is non-magnetic, but may also be weakly magnetic, and ferrite (mainly 430, 409l, 439 and 445nf, etc. Stainless steel which has some steel (such as 304, etc.From the stainless steel development prospects, 400 series instead of 300 series can be described as the trend. Martensitic or ferrite type such as 430,420,410;Austenitic type is non-magnetic or weak magnetic, martensite or ferrite is magnetic. Most of the stainless steel commonly used as decorative tube sheet is austenitic 304 material, generally magnetic or weak magnetic, but due to smelting caused by chemical composition fluctuations or processing status may also appear magnetic, but this can not be considered fake or unqualified, what is the reason for this? The above mentioned austenite is non-magnetic or weak magnetic, and martensite or ferrite is magnetic, due to smelting component segregation or improper heat treatment, will cause austenitic 304 stainless steel in a small amount of martensite or iron Body tissue. In fact, this is a very one-sided, unrealistic way to identify the wrong.) and martensite As a representative) are generally with a magnetic.

In order to completely eliminate the above-mentioned causes of the 304 steel magnetic, can be recovered by high temperature solution to stabilize custom Martensite Stainless Steel Tube the austenite structure, thereby eliminating the magnetic. Due to Ling bending deformation of the larger magnetic sense is obvious, the production side of the rectangular tube deformation than the tube, especially the corner part of the deformation is more intense magnetic more obvious. To completely eliminate the magnetic properties of 304 stainless steel can be restored by high temperature solution to stabilize the austenite structure, thus eliminating the magnetic, so the magnetic properties of the material is the arrangement of the rules and the electron spin of the co-directional decision, we think The physical properties of the material, and the corrosion resistance of the material is determined by the chemical composition of the material is the chemical properties of the material, and whether the material has nothing to do with the magnetic. In particular, it is due to the above reasons caused by the 304 stainless steel magnetic, with other materials of stainless steel, such as 430, carbon steel is not the same level of magnetic, that is, 304 steel magnetism always shows the weak magnetic.

It is mentioned that the austenite is non-magnetic or weak magnetic, and ferrite and martensite is magnetic, due to smelting component segregation or improper heat treatment, will cause austenitic stainless steel in a small amount of martensite or iron The 304 stainless steel is cold-processed, the structure will also be transformed into martensite, the greater the deformation of cold working, the greater the transformation of martensite, the magnetic will be stronger.) classified as non-magnetic stainless steel “refers to its magnetic indicators below a certain value only, that is, generally stainless steel are more or less with a certain magnetic.Therefore, 304 stainless steel will appear weak magnetic. A wide range of stainless steel, according to the organizational structure at room temperature can be divided into several categories1.According to the study of material physics, the magnetic properties of the metal are derived from the structure of the electron spin, and the electron spin belongs to the quantum mechanical properties, either upwards or downwards.

In ferromagnetic metals, electrons are automatically rotated in the same direction, and some of the antiferromagnetic metal materials are in the regular pattern, while the adjacent electrons move in opposite directions or antiparallel spin, but for triangular crystals In the case of electrons, since the two electrons in each triangle must spin in the same direction, the spin structure is no longer present. People often think that the magnet adsorption of stainless steel, to verify its advantages and disadvantages and authenticity, do not smoke non-magnetic, that is good, genuine; suction magnetic, is considered counterfeit fake.

This tells us that if the stainless steel with weak magnetic or completely without magnetic, should be judged as 304 or 316 material; if the magnetic properties of carbon steel, showing a strong magnetic, because the judge is not 304 material. As a batch of steel, production Φ76 tube, no obvious magnetic induction, production Φ9. In addition, 304 stainless steel after cold processing, the structure will be transformed into martensite, cold forming the greater the degree of deformation, the greater the transformation of martensite, steel, the greater the magnetic. Think. Austenitic type such as 304,321,316,310;2. The 200 series of materials because of scrap recycling is facing many difficulties, the Department of non-environmentally friendly stainless steel, if the increase in the use of the steel is not conducive to the sustainable development of the entire stainless steel industry, so now many foresight of large enterprises are to 200, and look to the more potential for the development of 400 series of stainless steel. In this way, 304 stainless steel will be with a weak magnetic.5 tube

As the steel side of the chewing edge

When the width of the steel strip When the deviation is greater than the allowable deviation, the squeezing force is increased when the steel pipe is welded, and the welding defects such as tip, welding or burr appear at the weld of the pipe.85%, roll adjustment accounted for 22. The steel pipe thickness of the steel pipe with the same thickness of the steel pipe, which requires the same thickness of the steel pipe with the same thickness is required to be transferred to the wall thickness difference of the finished steel pipe, so that a large number of steel pipe thickness exceeds the allowable deviation and waste.Effect of geometrical dimensions on the quality of the steel pipe when the width of the steel strip is less than the allowable deviation, the squeezing force of the welded steel pipe is reduced, so that the welding of the steel pipe is not strong, the crack or the opening pipe appears.99%, is a relatively minor link.

When the tensile strength of steel strip more than 635MPa, elongation less than 10%, the strip in the welding process is prone to crack. Therefore, in the steel pipe production China stainless steel seamless pipe manufacturers process, should deal with raw materials, welding technology and roll adjustment of three links to focus on control. Of which 32. The edge of the strip (that is, the edge of the strip showing jagged rugged phenomenon), generally appear in the longitudinal belt, the reason is the slitter disc blade blunt or not caused by sharp. When the tensile strength of less than 300MPa, the strip in the molding process due to soft materials, the surface easy to wrinkle.44% of raw materials, welding process accounted for 24. Therefore, in the steel strip before welding, to check the surface quality of each coil and geometric size, the quality of the strip does not meet the standard requirements, do not carry out production, so as to avoid unnecessary losses.In the production process of erw carbon steel pipe, how to ensure that the product quality in line with the requirements of technical standards and customer needs, the steel pipe production process should be the impact of product quality factors.

It can be seen that the mechanical properties of the material have great influence on the quality of the steel pipe, and the quality of the steel pipe should be effectively controlled from the material strength. The yield point and the tensile strength of the steel strip are too high, which will cause the steel strip to be difficult to be formed.01%, is the main link. Especially when the wall is thick, the material has high elasticity, and the steel pipe has large deformation stress during welding. The impact of the roll material, equipment failure, production environment and other reasons, the impact of steel products on the quality of 19.Thickness fluctuations not only affect the thickness of the finished steel pipe accuracy, at the same time, due to the thickness of the steel strip, so that the steel pipe in the welding, the extrusion pressure and welding temperature instability, resulting in welded steel welding quality is not stable.

In the production process affect the quality of welded pipe products are raw materials, welding technology, roll adjustment, roll material, equipment failure, production environment and other reasons.The mechanical properties of steel strip on the quality of steel pipe commonly used steel welded steel for the carbon structural steel. Steel strip surface defects on the quality of the steel pipe surface defects are common sickle bend, wave-shaped, longitudinal gripping edge, etc. As the steel side of the chewing edge, there are local lack of meat, so that the steel strip in the easy to produce cracks, cracks and affect the quality of the stability of the weld. Therefore, the fluctuation of the strip width not only affects the accuracy of the outer diameter of the steel pipe, but also seriously affects the surface quality of the steel pipe.72%, the three accounted for 80. In the process of forming steel pipe, sickle bending and wavy shape will cause the strip deviation or flip, easy to make welding seam welded steel pipe, affecting the quality of steel., sickle and wave shape generally appear in the cold-rolled strip rolling process, by the pressure Under the amount of improper control caused. In addition, due to the existence of steel within the sandwich, impurities, trachoma and other material defects, but also affect the quality of an important factor in steel

The heating temperature is too high or the heating time is too long

The heating temperature is too high or the heating time is too long, will cause the tube had burned, decarbonization, and even lead to substandard steel chemical composition (carbon content failed), likely to cause the bulk of the quality problem, seriously affect the product yield. First perforated tube straightness requirements must be met, tube bending than the standard requirements easily lead to perforation machine rolling card, it will not only affect the normal perforation puncher, affecting production rhythm, but also affects the ring furnace tube heating time, the adverse impact on some steel products quality. Puncher adjustment parameters, especially within the pipe will produce the amount of warping head reach unreasonable.Tube is necessary for the production of raw steel, tube quality directly affects the quality of steel products.

Another factor affecting the quality of the mother pipe surface of the mandrel is the quality of the situation. Effect of the mother pipe is a factor in the quality of the final roll rolls have a certain life, when the roll wear to a certain extent, will lead to the production of severe shortage pipe thread appears, and poor ultra thickness requires adjustment or replacement in time roll, if you continue to use worn roll will result in serious quantities of product quality issues. When a serious head or stick steel surface wear phenomenon occurs, is likely to cause skin capillary China TP410 Martensite Stainless steel tube manufacturersgenerated within Alice, Alice and the skin inside the pipe can not be eliminated or grinding, will lead directly to steel scrap judgment. Factors affecting the quality of capillary quality are: punching machine to adjust the parameters, the surface quality of the guides, the head surface quality, surface quality and immediate impact on the quality of the capillary is particularly serious.

Secondly inclination on the perforated tube cutting process will produce some adverse effects. Incoming inspection must be done in a timely manner, identify problems in time, do not stay hidden for the steel production. Cut diagonally through the large tube ends irregular or likely to cause uneven wall thickness perforated capillary, thus affecting the entire pipe dimensional accuracy. Accel unit production of steel is the most obvious sign of an internal thread phenomenon, through barren rolling three-roll rolling machine whose inner wall of the tube after rolling can not eliminate the presence of traces of that thread. Although the outer skin can be reground Alice in testing, when the outside can also cause severe warping the entire root steel scrap. When the thick-walled pipe thread rolling problem is not obvious when the thin-walled tube rolling thread if improperly adjusted phenomenon will be very obvious, and will lead to uneven thickness of the final product exceeded, the wall thickness of the local area and even lead to excessive that become scrap steel pipe.

In order to avoid the impact of the quality of the steel tube product quality, must be strictly enforced tube inspection system and tube cutting system.Hot-rolled seamless steel pipe production process perforation of the first deformation processes, perforated capillary quality directly affects the quality of the final product.Shortage capillary tube is then cut through the wall to get semi-finished steel, the quality control unit is Accel hardest and most important part.

In order to ensure the stability of perforated tube and chemical properties of the ring furnace operation technical regulations should be strictly enforced, always check the furnace operating conditions encountered anomalies in time and make a record, and promptly notify the subsequent positions and quality management department good job tracking and processing. The tube will cause the hair warping or cracking guide surface wear serious. Heating the tube to ensure successful completion of a plastic tube having perforations sufficient critical process while the heating temperature and the heating time will have a huge impact on the performance of the steel pipe. Mandrel is rolling machine rolling tube-shaped tool in the table, determine the quality of the inner surface of blank pipe and the inner surface of the tube in the subsequent shortage of quality inspection can only be checked, but not grinding, can easily lead to the entire root of steel scrap judgment

1 2