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铬13类马氏体不锈钢作为手术器械用钢已有多年的历史。开始时由于没有掌握该类钢的热处理规律而照一般合金钢热处理经验进行生产,问题不少。以后经过较长时间的摸索试验,有如下一些体会。一、从Fe-C-Cr系三元平衡图得知,含13%Cr的钢存在三种碳化物—(Fe,Cr)_(23)C_6、(Fe,Cr)_7C_3、(Fe,Cr)_3C,其中有的碳化物加热到高温还不溶解,起了机械阻碍晶粒长大的作用。因此,这类钢的淬火温度范围很广,加热到900～1050℃淬火可得到不同程度的硬化,淬火温度越高,奥氏体中溶解的碳
Chromium 13 type martensitic stainless steel has been used as a surgical instrument steel for many years. Initially, there was a lot of problems because it failed to grasp the heat treatment rules of such steels and did the same according to the general experience of heat treatment of alloy steels. After a long time after the groping test, some of the following experience. First, from the ternary equilibrium diagram of Fe-C-Cr, it is found that there are three types of carbides - (Fe, Cr) _ (23) C_6, (Fe, Cr) _7C_3, (Fe, Cr ) _3C, some of which carbide is heated to high temperature does not dissolve, played a mechanical obstruction of grain growth. Therefore, the quenching temperature range of this type of steel is very wide, heated to 900 ~ 1050 ℃ quenching can be hardened to different degrees, the higher the quenching temperature, the dissolved carbon in austenite