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      Processing level and application of bearing surface

      Processing level and application of bearing surface

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      • Time of issue:2020-07-13
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      (Summary description)Original surface: NO.1 The surface treated with heat treatment and pickling after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industry equipment, etc., the thickn

      Processing level and application of bearing surface

      (Summary description)Original surface: NO.1 The surface treated with heat treatment and pickling after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industry equipment, etc., the thickn

      • Categories:News Center
      • Author:
      • Origin:
      • Time of issue:2020-07-13
      • Views:0
      Information
      Original surface: NO.1 The surface treated with heat treatment and pickling after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industry equipment, etc., the thickness is thicker from 2.0MM-8.0MM.
       
      Blunt surface: NO.2D is heat-treated and pickled after cold rolling. Its material is soft and the surface is silvery white gloss. It is used for deep drawing processing, such as automobile components and water pipes.
       
      Matte surface: NO.2B After cold rolling, heat treatment and pickling, and then finish rolling to make the surface moderately bright. Because the surface is smooth, it is easy to regrind, making the surface brighter, and has a wide range of uses, such as tableware and building materials. After adopting the surface treatment with improved mechanical properties, it can satisfy almost all uses.
       
      Coarse sand NO.3 The product grinded with 100-120 abrasive belt. It has better gloss and discontinuous rough lines. Used for interior and exterior decoration materials, electrical products and kitchen equipment.
       
      Fine sand: NO.4 is the product grinded by the abrasive belt with the size of 150-180. It has better gloss, has discontinuous rough lines, and the stripes are finer than NO.3. Used in baths, interior and exterior decoration materials, electrical products, kitchen equipment and food equipment.
       
      #320 Grind the product with No. 320 abrasive belt. It has better gloss, has discontinuous rough lines, and the stripes are finer than NO.4. Used in baths, interior and exterior decoration materials, electrical products, kitchen equipment and food equipment.
       
      Hairline surface HAIRLINE: HL NO.4 is a product with continuous grinding of polishing belt with appropriate particle size to produce abrasive patterns (subdivision No. 150-320). Mainly used in architectural decoration, elevators, building doors, panels, etc.
       
      Bright surface: BA is cold-rolled and then brightly annealed and flattened. The surface gloss is excellent, with high reflectivity. Like a mirror surface. Used in home appliances, mirrors, kitchen equipment, decorative materials, etc.
       
      SUS304: It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, good hot workability such as stamping and bending, no heat treatment hardening phenomenon, and no magnetism. Widely used in household products (category 1, 2 tableware), cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical appliances, building materials, chemicals, food industry, agriculture, ship parts.
       
      SUS304L: Austenitic basic steel type, the most versatile; excellent corrosion resistance and heat resistance; excellent low temperature strength and mechanical properties; single-phase austenitic structure, no heat treatment hardening phenomenon (non-magnetic, use temperature -196-- 800℃).
       
      SUS304Cu: austenitic stainless steel with 17Cr-7Ni-2Cu as the basic composition; excellent formability, especially wire drawing and aging crack resistance; - corrosion resistance is the same as 304.
       
      SUS316: corrosion resistance and high temperature strength are particularly good, can be used under harsh conditions, good work hardening, non-magnetic. Suitable for seawater equipment, chemistry, dyes, papermaking, oxalic acid, fertilizer production equipment, photography, food industry, coastal facilities.
       
      SUS316L: Mo is added to the steel (2-3%), so the corrosion resistance and high temperature strength are excellent; SUS316L has a lower carbon content than SUS316, so the intergranular corrosion resistance is better than SUS316; the high temperature creep strength is high. Can be used in harsh conditions, good work hardening, non-magnetic. Suitable for seawater equipment, chemistry, dyes, papermaking, oxalic acid, fertilizer production equipment, photography, food industry, coastal facilities.
       
      SUS321: Ti is added to 304 steel, so it has excellent intergranular corrosion resistance; high temperature strength and high temperature oxygen resistance; high cost and poor workability than SUS304. Heat-resistant materials, exhaust pipes for automobiles and aircraft, boiler covers, pipes, chemical devices, and heat exchangers.
       
      SUH409H: Good processing performance, welding performance, high temperature oxidation resistance, can withstand the temperature range from room temperature to 575 ℃. It is widely used in automobile exhaust system.
       
      SUS409L: Control the C and N content in the steel, so it has excellent weldability, formability and corrosion resistance; contains 11% Cr, ferrite stainless steel with BCC structure at high temperature and normal temperature; because it is filled with Ti, it is below 750℃ Void oxidation and corrosion resistance.
       
      SUS410: martensite represents steel grade, high strength, high hardness (magnetic); poor corrosion resistance, not suitable for use in severe corrosive environments; low C content, good workability, surface hardening through heat treatment.
       
      SUS420J2: martensite represents steel grade, high strength, high hardness (magnetic); poor corrosion resistance, poor formability, good wear resistance; can be heat treated to improve mechanical properties. Widely used in processing knives, nozzles, valves, board rulers, tableware.
       
      SUS430: Low thermal expansion rate, good molding and oxidation resistance. Suitable for heat-resistant appliances, burners, home appliances, category 2 tableware, kitchen sinks. Low price and good workability are the ideal substitutes for SUS304; good corrosion resistance, typical non-heat treatment hardening ferritic stainless steel.
       
      In particular, 316 and 317 stainless steel (317 stainless steel performance see below) are molybdenum-containing stainless steel species. The content of molybdenum in 317 stainless steel is slightly better than that of 316 stainless steel. Due to the molybdenum in steel, the overall performance of this steel is better than that of 310 and 304 stainless steel. Under high temperature conditions, when the concentration of sulfuric acid is less than 15% and higher than 85%, 316 Stainless steel has a wide range of uses. 316 stainless steel also has good performance against chloride attack, so it is usually used in the marine environment.
       
      The maximum carbon content of 316L stainless steel is 0.03, which can be used in applications that cannot be annealed after welding and require maximum corrosion resistance.
       
      Corrosion resistance: The corrosion resistance is better than 304 stainless steel, and it has good corrosion resistance in the production process of pulp and paper. And 316 stainless steel is also resistant to the erosion of the ocean and the aggressive industrial atmosphere.
       
      Heat resistance: 316 stainless steel has good oxidation resistance in intermittent use below 1600 degrees and continuous use below 1700 degrees: in the range of 800-1575 degrees, it is best not to continuously act 316 stainless steel, but in this When 316 stainless steel is used continuously outside the temperature range, the stainless steel has good heat resistance. 316L stainless steel has better resistance to carbide precipitation than 316 stainless steel, and can be used in the above temperature range.
       
      Heat treatment: annealing in the temperature range of 1850-2050 degrees, then rapid annealing, and then quickly cooling. 316 stainless steel cannot be hardened by heat treatment.
       
      Welding: 316 stainless steel has good welding performance. All standard welding methods can be used for welding. Depending on the application, 316Cb, 316L or 309Cb stainless steel filler rods or welding rods can be used for welding. In order to obtain the best corrosion resistance, the welding section of 316 stainless steel needs to be annealed after welding. If 316L stainless steel is used, post-weld annealing is not required.
       
      Typical uses: heat exchangers for paper and papermaking equipment, dyeing equipment, film processing equipment, pipelines, exteriors of buildings in coastal areas.

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