降Nb,V,Ni添加Mn对HD钢二次硬化的影响  

Influence of alloying elements on secondary hardening of hot work die steel

作　　者：梁洪达[1] 刘玉枋 郑瑞利 

机构地区：[1]山西矿业学院矿山机械系

出　　处：《山西矿业学院学报》1995年第1期53-57,共5页

摘　　要：利用透射电镜和化学相分析研究了降低Nb,V,Ni含量以及添加Mn对HD钢二次硬化的影响。研究结果表明,降低Nb,V,Ni后对二次硬化温度影响不大,但硬度升高。添加Mn可使二次硬化温度提前,并使硬度进一步升高。二次硬化主要由V_4C_3和Mo_2C引起。回火时沿孪晶界析出片状渗碳体。With the help of TEM and chemical phase analysis, the author researched the influence of alloying elements Nb, V, Ni and Mn on secondary hardening in hot work die steel. The results showed that the secondary harden temperature without much change and the hardness increased after reducing Nb, V and Ni, but the temperature lowered and the hardness further increased after Mn added. Secondary hardening is due to V4C3 and Mo2C. The flaky cementite is precipitated along the boundary of martensite while tempering.

关 键 词：热作模具钢 二次硬化 渗碳体 

分 类 号：TG142.73[一般工业技术—材料科学与工程]