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Cr17Ni2是一种高强度不锈钢,由于含Cr量高,并含有镍,钢件表面极易形成一层致密的钝化膜。采用普通的渗碳、渗氮或碳氮共渗的化学热处理方法很难满足技术要求。为了实现不锈钢渗碳处理,首先必须解决钝化膜的问题。虽然现在国内外有许多去除不锈钢钝化膜的方法,但它们都不同程度的存在着这样或那样的缺点,使用中受到限制。我们通过生产实践证明,在通用的气体渗碳炉中,在渗碳气氛下通入氨气,采用高温气体碳氮共渗法,顺利地实现了Cr17Ni2,1Cr18Ni9Ti等不锈钢的碳氮共渗。由于气体
Cr17Ni2 is a high strength stainless steel, due to the high content of Cr, and contains nickel, steel surface easily form a dense layer of passive film. Chemical carburization, carburizing, nitriding or carbonitriding chemical heat treatment is difficult to meet the technical requirements. In order to achieve carburizing stainless steel, we must first solve the problem of passivation film. Although there are many ways to remove the passive film of stainless steel both at home and abroad, they all have some shortcomings of one kind or another to some extent and are limited in use. We have proved through production practice that carbonitriding of Cr17Ni2, 1Cr18Ni9Ti stainless steel such as Cr17Ni2, 1Cr18Ni9Ti and other stainless steels has been successfully realized in the common gas carburizing furnace by introducing ammonia gas into carburizing atmosphere and adopting high-temperature gas carbonitriding method. Due to gas