化学成分对冷作模具钢组织的影响
Effect of Chemical Composition on Microstructure of Cold-working Die Steel
郭淑娟1, 才丽娟2
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作者单位：(1. 辽宁石油化工大学 职业技术学院, 辽宁 抚顺 113001; 2. 东北特钢集团技术中心, 辽宁 大连 116031)
中文关键字：化学成分； 冷作模具钢； 组织形态
英文关键字：chemical composition; cold-working die steel; microstructure
中文摘要：以7种不同成分的冷作模具钢为研究对象，分别探讨了Cr、Mo、V、W、Si 及稀土元素等对模具钢组织形态的影响。结果表明：Mo、V使钢中碳化物形态分散，且加热时不易溶入奥氏体中，起到细化晶粒、提高韧性的作用；钢中碳化物数量随Cr含量的增加而增加；Si可阻止碳元素溶入钢中，提高钢的回火稳定性；0.05%镧铈合金和0.05%稀土镁可使实验钢莱氏体及共晶碳化物形态更加圆润、不构成网状，可提高钢的热塑性，便于热加工成型。
英文摘要：Based on 7 types of different compositions of cold-working die steel, the effects of Cr, Mo, V, W, Si and RE on the microstructure of the die steel were studied. The results show that element Mo and V make carbide's shape scatter and the carbides are difficult to dissolve in austenite, they could refine grain and improve toughness; the content of carbides increases with the increase of Cr content; element Si could prevent carbon form dissolving in the steel and improve the tempering stability of the steel; 0.05%La-Ce alloy and 0.05%RE-Mg could make ledeburite and eutectic carbide morphology more round, not constitute a network, which improve the thermoplastic and hot thermo-forming property.