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Low temperature nitrocarburizing salt and method of use
Low temperature nitrocarburizing salt and method of use
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机译:低温氮碳共渗盐及其使用方法
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摘要
A composition for nitrocarburizing stainless steel parts and a method for producing a nitride or hard case on such parts using the composition, are provided. The composition includes alkali metal cyanate and alkali metal carbonate, wherein the cyanate ion is present in a weight percentage of greater than 45% and less than 55.2%. The composition is fused and maintained between about 750° F. and about 950° F. depending upon the type of stainless steel to be treated. The workpiece is immersed in the fused bath and left in until a satisfactory compound layer or case is formed. With austenitic stainless steel, the piece is immersed from about four hours to about six hours at temperatures between about 750° F. and about 950° F., preferably between 750° F. and 850° F. to maintain corrosion resistance. ;With 400 series stainless steel, increased corrosion resistance is achieved by immersion for between four and six hours at 950° F.
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