论文部分内容阅读
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。
The cold-work die steel with seven different compositions was taken as the research object and the effects of Cr, Mo, V, W, Si and rare earth elements on the microstructure of die steel were discussed respectively. The results show that Mo and V disperse the shape of carbides in the steel and are not easy to dissolve into the austenite during heating, which can refine the grains and improve the toughness. The amount of carbides in steel increases with the increase of Cr content. Si can prevent carbon elements from dissolving into the steel and improve the tempering stability of the steel. 0.05% lanthanum cerium alloy and 0.05% rare earth magnesium can make the shape of ledeburite and eutectic carbide of experimental steel more rounded without forming a network Improve the thermoplastic steel, easy to heat forming.