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某些合金钢(18XT,XBT,X15等)渗碳时表面含碳量增至相当于生铁中的含量(即2.5％～3.5％C)或者更高一些,这样可使钢的耐磨性提高到合金白口铸铁的水平,在钢铁表面和心部同时得到比生铁更好的工艺性能和使用性能。具有这种含碳量的渗碳层的最佳组织是在奥氏体转变产物的韧性基体内,均匀分布着增碳过程中形成的粒状碳化物。本文研究了钢用锰、铬、钒和钛(经常用于渗碳钢合金化的碳化物形成元素)单元和多元合合金化对碳化物的组织和形状、碳
The surface carbon content of some alloy steels (18XT, XBT, X15, etc.) increases to the equivalent of 2.5% -3.5% C in pig iron, which increases the wear resistance of the steel To the level of alloy white cast iron, the surface of the steel and the heart at the same time than pig iron better process performance and performance. The best structure for carburizing with this carbon content is the uniform distribution of the granular carbides formed in the carburizing process in the ductile matrix of the austenite transformation product. In this paper, we study the microstructure and shape of carbides in steel with manganese, chromium, vanadium and titanium (carbide-forming elements often used in the alloying of carburized steels)