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在铸件生产中,为获得金属液的同时凝固,常应用冷铁.有时为加强补缩和得到最佳结晶,也用冷铁来控制定向凝固.对灰铸铁,为增加基体组织中的渗碳体以提高硬度,如机床床身的导轨面,也常常应用冷铁,但同时会给切削加工带来困难,并降低感应淬透性.本文主要研究冷铁对球铁组织和感应淬透性的影响.
In the production of castings, in order to obtain the simultaneous solidification of molten metal, cold iron is often used, sometimes to enhance the shrinkage and get the best crystallization, cold iron is also used to control directional solidification.For gray cast iron, to increase the carburization in the matrix structure Body to improve the hardness, such as the machine bed rail surface, cold iron is also often used, but at the same time will bring difficulties to the cutting process, and reduce induction hardenability.In this paper, the research of cold iron ductile iron microstructure and induction hardenability Impact.