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脱碳层的鉴别,一般对於析出纯铁体的钢是根据ГОСТ1763-42规定,按纯铁体的量来判定的;对於很多在高温加热时不形成纯铁体,甚至在很慢的冷却下也不析出纯铁体的钢,如P18、P9、以及PK10、PK5、X12Ф、X12M等,则需用萨多夫斯基法,并按ГОСТ5952-51附注2所规定的热效理工艺进行。由於萨多夫斯基法对於在温度稍高於M_H时具有低的奥氏体稳定性的钢是不合适的,因此这些合金钢和高合金钢的脱碳层金相的测定,需采用等温处理方法来显示。
Identification of decarburized layer, generally for the precipitation of pure iron steel is determined according to ГОСТ1763-42 according to the amount of pure iron; For many in the high temperature heating does not form pure iron, even in very slow Cooling without precipitation of pure iron steel, such as P18, P9, and PK10, PK5, X12Ф, X12M, etc., you need to use the Sadowski method, and press ГОСТ5952-51 note 2 provides heat treatment technology get on. Since the Sadovskis method is not suitable for steels with low austenite stability at temperatures slightly above M_H, the decarburization metallurgical measurements of these alloy steels and high-alloy steels are to be carried out using Isothermal treatment method to display.