Manganese,and,nitrogen,instead business, insurance Manganese and nitrogen instead of nickel in chrome-nickel st
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So in stainlesssteel and many other alloys areas (such as Forging steel, tool steel, heatresistant steel, etc.), in particular, the relative lack of national resourcesof nickel extensively carry out the scientific section of nickel and otherelements on behalf nickel research and production practice, in this regard,more researches and applications based on manganese and nitrogen instead ofnickel in stainless steel and heat-resistant steel.The role of manganese for austenite is similarwith nickel. Spoken exactly, the role of manganese does not lie in theformation of austenite, but in that it reduces the critical quenching speed ofthe steel, to increase the stability of the austenite in cooling to suppressthe decomposition of the austenite, so that the formation of high temperatureaustenite is maintained to the room temperature. In improving the corrosionresistance of steel, the role of manganese, such as the manganese powdercontent in the steel changes from 0 to 10.4%, the steel in the air with theacid corrosion resistance can not be changed obviously. Manganese in the steelstable austenite is approximately half of the nickel, i.e. 2% of the nitrogenin the steel also stable austenite, and the effect of even larger extent thannickel. For example, want to make stainless steel containing 18% chromium get austeniticstructure at room temperature, low-nickel stainless steel and nickel CrMnNwhich use manganese and nitrogen instead of nickel has been applied inindustry, and some has successfully replaced the chrome-nickel stainless steel.In addition, stainless steel also containsa number of other elements. The same as the others and general steel isnormally kept impurity elements, such as silicon, sulfur, phosphorus and thelike. Also some added for some specific purpose, such as cobalt, boron,selenium, and rare earth elements and the like. From the nature of corrosionresistance of stainless steel, these elements relative to the nine elementsthat have been discussed are non-major aspects, but despite this, it can not becompletely ignored, because they are also impact on the performanceorganization of stainless steel. Silicon is a element forming ferrite, is theimpurity element normally kept in general stainless steel.From the surveys by metal powder supplier, the cobaltas an alloying element is not often use in steel, this is because of the highprice of cobalt, and in other respects (such as high speed steel, carbide, andcobalt-based heat resistant alloy, alnico or hard magnetic alloys, etc.) have amore important purpose. Plus cobalt as alloying elements in the normalstainless steel is not very often, commonly used stainless steel plus cobalt,is not aimed to improve corrosion resistance but is to improve the hardness,because the main purpose of this stainless steel manufacturing slicingmachinery and cutting tools, scissors and scalpel blades.The rare earth elements used in stainlesssteel, mainly is to improve process performance. Such as added a small amountof rare earth elements to Crl7Ti steel and Cr17Mo2Ti steel can eliminate theingot due to hydrogen bubbles caused and reducing the cracks in the slab.Austenitic and austenitic - ferritic stainless steel plus 0.02 to 0.5% of therare earth elements (cerium lanthanum alloy), can significantly improve theforging performance. Had a containing 19.5% chromium, 23% nickel, andmolybdenum, copper, manganese austenitic steels, only the production ofcastings in the past due to the performance of thermal processing, plus rareearth elements can be rolled into a variety of shapes.Source:http://www.mhcmp.com Article Tags: Chrome-nickel Stainless Steel, Rare Earth Elements, Nitrogen Instead, Chrome-nickel Stainless, Stainless Steel, Corrosion Resistance, Rare Earth, Earth Elements
Manganese,and,nitrogen,instead