本文作者通过淬火回火硬度试验,室温和高温拉伸冲击试验以及金相和电镜组织观察,研究了V,Mo,Ni,Nb,Co和B等合金元素对热作模具钢组织和性能的影响.结果表明:适宜的合金元素含量对钢的室温和高温强韧性产生很好的作用,所得结果对于热作模具钢新钢种开发有重要参考价值. The authors studied the effect of alloying elements such as V, Mo, Ni, Nb, Co and B on the microstructure and properties of hot die steel by quenching and tempering hardness test, room temperature and high temperature tensile impact test and microstructure and electron microscopy. The results show that suitable alloying elements have a good effect on the room temperature and high temperature toughness of steel, and the obtained results are of important reference value for the development of new steel for hot die steel.