Stainless Steel Plate

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Stainless Steel Plate

Post  landoo on Wed Jan 16, 2013 1:42 am

Two of the hot-rolled and cold-rolled stainless steel plate, Method, including thickness of 0.02 to 4 mm thin stainless steel sheet and 4.5-100 mm plate. Organizational characteristics of the steels are divided into five categories: austenitic, austenitic - ferritic, ferritic, martensitic precipitation hardening type. Oxalic acid, sulfuric acid - ferric sulfate, nitrate, nitric acid - hydrofluoric acid, sulfuric acid - copper sulfate, phosphoric acid, formic acid, acetic acid and other acid corrosion is required to stand, widely used in the chemical, food, pharmaceutical, paper, petroleum, nuclear industrial, and construction, kitchen utensils, cutlery, vehicles, household appliances various parts.
Meet the requirements in order to ensure that the various types of stainless steel plate yield strength, tensile strength, elongation and hardness mechanical properties, heat treatment of steel plate before delivery after annealing, solution heat treatment and aging treatment. The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and the internal organizational structure, play a major role is the chromium. Chromium has a high chemical stability, can form a passivation film on the steel surface, so that the metal and the rest of the world to isolate, to protect the steel sheet is not oxidized, to increase the corrosion resistance of the steel sheet. After the destruction of the passivation film, the corrosion resistance is decreased.
Cold-rolled non-oriented silicon steel strip (sheet) method: DW + iron loss value (frequency 50HZ waveform sinusoidal magnetic induction peak 1.5T unit weight of the iron loss value.) 100 + thickness values 100 times. DW470-50 said iron loss value 4.7w/kg, thickness of 0.5mm cold-rolled non-oriented silicon steel, is now the new models 50W470.
Cold rolled grain oriented silicon steel strip (sheet) method: DQ + iron loss value (frequency 50HZ waveform sinusoidal magnetic induction peak 1.7T unit weight of the iron loss value.) 100 times + thickness values of 100 times. Sometimes the value of iron loss plus G high magnetic induction. DQ133-30 said iron loss value of 1.33, the thickness of 0.3mm cold-rolled grain-oriented silicon steel strip (sheet), and now the new models 30Q133.
Hot-rolled stainless steel plate, hot-rolled silicon steel plate DR said, according to the number of silicon content is divided into low silicon (silicon content ≤ 2.8%), silicon (Si> 2.8%). The method: DR + iron loss value (50HZ repeatedly magnetized and the sine-shaped variation of the magnetic induction intensity maximum of 1.5T when the unit weight of the iron loss value) 100 times + thickness of 100 times the value of. DR510-50 represents the iron loss value of 5.1, the hot-rolled silicon steel sheet with a thickness of 0.5mm. Household appliances with grades of hot-rolled silicon steel sheet JDR + iron loss value + thickness values expressed as JDR540-50.
Stainless steel plate with the unstable nickel-chromium alloy 304 similar resist general corrosion. May affect the prolonged heating in the temperature range in the degree of chromium carbide alloys 321 and 347 in the harsh corrosive medium. Mainly used in high temperature applications, high-temperature applications require materials with strong allergy resistance to prevent the lower temperature intergranular corrosion.
The stainless steel plate having a high-temperature oxidation resistance, however, the oxidation rate will be affected by exposure inherent factors of the environment and the product form.
In addition to depending on the coefficient of thermal conductivity of the metal, the total heat transfer coefficient of the metal, but also depend on other factors. In most cases, the film is heat coefficient, scale and metal surface condition. The stainless steel can keep the surface clean, so its better thermal conductivity than other higher coefficient of thermal conductivity of the metal. Liaocheng Suntory stainless steel providing eight, the technical standard of the stainless steel plate corrosion resistance, bending performance and toughness of the welded portions, and the punching workability of the welded portion The high-strength stainless steel sheet and its manufacturing method. Specifically is containing C: 0.02% or less, N: 0.02% or less of Cr: more than 11% less than 17%, an appropriate content of Si, Mn, P, S, Al, Ni, and satisfy 12 ≤ Cr Mo 1.5Si ≤ 17,1 ≤ Ni 30 (CN) 0.5 (Mn Cu) ≤ 4, Cr 0.5 (Ni Cu) 3.3Mo ≥ 16.0,0.006 ≤ CN ≤ 0.030 of the stainless steel plate is heated to 850 to 1250 ° C, then carried 1 ° C / s or more cooling rate of the heat treatment. This can be a tissue containing more than 12% of the volume fraction of martensite, the high strength of more than 730MPa, corrosion resistance and bending properties, and excellent in the toughness of the weld heat affected zone of the high-strength stainless steel plate. Reuse containing Mo, B, etc., can significantly improve the punching workability of the welded portions.
Select the stainless steel plate to consider the use of operating conditions, for example, manual operation or automatic operation, the pressing machine's performance and the type, the quality of the pressing material requirements such as hardness, gloss, etc.. But also consider the economic accounting requirements can produce a slow-quality decorative plate number of each new polished steel plate.
In addition, the choice of the thickness of the steel plate of the most reasonable, should consider the use of time, mass, stiffness, taking into account the strength requirements sheet pressure; thermal conductivity; pressure distribution, pressure plate format specifications.
If the plate thickness is not enough, easy to bend, bound to affect the production of decorative panels. If the thickness is too large, steel is too heavy, not only increase the cost of the steel plate, and will be brought on to the operator does not have to play the difficult. Also consider stainless steel plate processing or use of the margin should be left. The thickness of the stainless steel plate is not absolute, but strive to be consistent with the thickness of a steel plate, the general medium size sawing, thickness tolerances 0.05 o.15 mm. Such as the requirements are too stringent and grinding costs will increase. General tensile structure steel plate, stiffness and resistance to mechanical damage greater the performance, durability longer, but the abrasive bearing in mind that the processing costs are relatively high.

landoo

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