corrosion resistance of stainless steel sheet

stainless steel sheet corrosion resistance depends mainly on its stainless steel plate 304 composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and internal organizational structure, play a major role in the chromium. Chromium has a high chemical stability, steel Cold rolled stainless steel film formed on the surface of the metal with the outside world to isolate and protect steel from oxidation, increasing corrosion resistance of steel.

stainless steel sheets the influence

Obtained without oxidizing the surface of the 409 stainless steel
Bright annealing under protective atmosphere of H2 strip for heat treatment. To achieve the BA board requirements , must be very strictly controlled furnace protective atmosphere to avoid oxidation. H2 oxidation protective atmosphere How did this happen.The main components of stainless steel alloy are Fe, Cr, Ni, Mn, Ti, Si and the like. Within the annealing temperature range , Fe, Ni oxide is not a major problem. However, Cr, Mn, Si, Ti oxide in the range of the heating temperature in the range precisely . Oxidation is the influence of these alloying elements in the steel strip surface brightness . Especially chromium oxide surface of the strips off the chromium reduces stainless steel sheet metal resistance of stainless steel . When the Cr content of 17% ~ 18%, Ti content of 0.5% , H2 dew point must be below -60 ℃, in order to prevent Cr, Ti oxide in the range of 800C ~ 1150 ℃ of heat .

stainless steel 304 sheet very strict

Technical requirements of high vertical bright annealing furnace , equipment manufacturers equipment maintenance and stainless steel 304 sheet supply requirements are very strict, which part of the equipment maintenance and spare parts supply and delivery service only , does not provide the drawings , expensive.
Improve the quality of stainless steel and die life , should use different names and stainless steel metal forming material friction material , and taking into account the size of drawing parts and production quantities .
1 large size stainless steel deep drawing stainless steel parts , not very large production volume, in order to stainless steel sheet 304 , should use cast iron HT300, QT600-2 , etc., as convex and concave mold materials, may also be of special cast iron .
2 , small and medium size stainless steel deep drawing parts , copper based alloys generally used as mold material, such as aluminum bronze, aluminum and iron bronze, phosphor bronze .