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一、前言高速钢是主要的刀具材料之一。刀具材料的主要性能是耐磨性、红硬性与韧性。为了提高高速钢的耐磨性及红硬性而加入某些合金元素,现在不少钢种已在生产中应用;但耐磨性与红硬性的提高又往往使韧性有所下降。为了提高韧性,可采用微量元素孕育法、加振凝固法及电渣熔炼法等,使钢中碳化物微细化和均匀化;此外,还可采用热加工以改善碳化物分布状况。在改善高速钢性能的众多方法中,能使碳化物形状及其分布得以改善的最有效方法是粉末冶金法;用这种方法制造的高速钢,称为粉
I. Introduction High-speed steel is one of the main tool materials. The main tool material performance is wear resistance, red hardness and toughness. In order to improve the high-speed steel wear resistance and red hardness and join some of the alloying elements, and now many steel grades have been applied in production; but increased wear resistance and red hardness tends to make the toughness decreased. In order to improve the toughness, the trace element inoculation method can be used, vibration coagulation method and electroslag smelting method, so that the carbide in the steel micronization and homogenization; In addition, you can also use thermal processing to improve the carbide distribution. Among the many ways to improve the performance of high-speed steels, the most effective way to improve the carbide shape and its distribution is the powder metallurgy method; the high-speed steel produced by this method,