Toplota odpornost nerjaveče nerjaveče jeklo

Toplota odpornost pomeni to nerjaveče jeklo pločevinka še vedno vzdrževanje odlično fizično in mehansko lastnosti at visoke temperature.
The effect of carbon: Carbon in avstenitno nerjaveče jeklo is an element to močno oblike in stabilizira avstenit in razširi the avstenit regija. The ability of carbon to oblika avstenit is približno 30 krat to to nikelj, ogljik is a intersticijsko element, in the trdnost of avstenitno nerjaveče jeklo lahko be znatno izboljšano z rešitev okrepitev. ogljik lahko tudi izboljšanje the stres and korozija odpornost avstenitno nerjaveče jeklo v visoko koncentrirano kloridi (kot as 42% 25 MgCl2 vrelišče raztopina).
However, in austenitic stainless steel, carbon is often regarded as a harmful element, mainly because under some conditions in the corrosion resistance of stainless steel (such as welding or heating at 450~850 degree C), carbon can form high-chromium Cr23C6 carbon compounds with chromium in steel, resulting in local chromium depletion, so that the corrosion resistance of steel, especially the resistance to intergranular corrosion, is reduced. Therefore. Since the 1960s, the new development of chromium-nickel austenitic stainless steel is mostly carbon content less than 0.03% or 0.02% ultra-low carbon type, it can be known that with the reduction of carbon content, the intergranular corrosion sensitivity of steel is reduced, when the carbon content is less than 0.02% to have the most obvious effect, some experiments also pointed out that carbon will increase the point corrosion tendency of chromium-austenitic stainless steel. Due to the harmful effect of carbon, not only should the carbon content be controlled as low as possible in the process of austenitic stainless steel smelting as required, but also in the subsequent hot, cold processing and heat treatment process to prevent the surface of stainless steel carburization and avoid chromium carbide precipitation.