How to by manganese and nitrogen instead of chrome nickel stainless steel nickel principle

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Although many advantages of chrome-nickel austenitic steels, but in recent decades due to nickel-based heat-resistant alloys and nickel-containing less than 20% of the heat resistant steel, a large n umber of development and application, as well as the chemical industry growing the requirement of stainless steel has become bigger, while the amount of nickel deposits less because concentrated in a few areas, nickel contradiction in the supply and demand worldwide. So in stainless steel and many other alloys areas (such as Forging steel, tool steel, heat resistant steel, etc.), in particular, the relative lack of national resources of nickel extensively carry out the scientific section of nickel and other elements on behalf nickel research and production practice, in this regard, more research and applications based on manganese and nitrogen instead of nickel in stainless steel and heat-resistant steel.sealed roller bearing
Manganese the role and nickel austenite similar. Spoken exact role of manganese does not lie in the formation of austenite, but in that it reduces the critical quenching speed of the steel, to increase the stability of the austenite in cooling to suppress the decomposition of the austenite, so that the formation of high temperature austenite is maintained to the room temperature. Improve the corrosion resistance of steel can, the role of manganese, such as the manganese content in the steel changes from 0 to 10.4%, nor the steel in the air with the acid corrosion resistance can be changed obviously. This is because the manganese to enhance the role of the electrode potential of the iron-based solid solution is small, the protective effect of the oxide film formed is also low, so industrial Notwithstanding manganese alloyed austenitic steels (eg 40Mn18Cr4, 50Mn18Cr4WN, ZGMn13 steel etc.), but they can not be used as the use of stainless steel. Manganese in the steel stable austenite is approximately half of the nickel, i.e. 2% of the nitrogen in the steel also stable austenite, and the effect of even larger extent than nickel. For example, purports steel containing 18% chromium austenitic structure at room temperature stainless steel, nickel manganese and nitrogen on behalf of low-nickel stainless steel with nickel yuan CrMnN has been applied in industry, and some 18-8 chrome-nickel stainless steel has been successfully replaced the classic.crossed roller bearing