微量钛对4Cr5MoSiV1合金钢组织性能的影响  

Effect of trace titanium on microstructure and properties of 4Cr5MoSiV1 alloy steel

作　　者：王要利[1] 宋克兴[1,2,3] 张彦敏 韩文奎 张帅帅 WANG Yao-li;SONG Ke-xing;ZHANG Yan-min;HAN Wen-kui;ZHANG Shuai-shuai(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology,Luoyang 471023,China;Henan Key Laboratory of Advanced Non-Ferrous of Metals,Luoyang 471023,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023 [3]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《材料热处理学报》2021年第3期112-119,共8页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划(2016YBF0300400);河南省高等学校重点科研项目(18A430015)。

摘　　要：采用真空熔炼法制备了不同钛含量的4Cr5MoSiV1热作模具钢,利用洛氏硬度计、扫描电镜(SEM)和透射电镜(TEM)等研究了4Cr5MoSiV1Ti热作模具钢的组织与性能。结果表明:随着钛含量的增加,4Cr5MoSiV1Ti热作模具钢的热稳定性和抗拉强度均先增加后降低。当钛添加量为0.13 mass%时,合金钢具有良好的热稳定性、强度及伸长率和断面收缩率,回火后析出了尺寸约为50 nm的四边形TiC第二相;而当钛添加量为0.54 mass%时,三叉晶界处析出了尺寸为300 nm左右的不规则TiC粒子,这将对合金钢的热稳定性和力学性能产生不良的影响。4Cr5MoSiV1 hot working die steel with different titanium content was prepared by vacuum melting,and microstructure and properties of the 4Cr5MoSiV1 Ti hot working die steel were studied by means of Rockwell hardness tester,scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results show that the thermal stability and tensile strength of the 4Cr5MoSiV1 Ti hot working die steel increase first and then decrease with the increase of the titanium content.When the titanium content is 0.13 mass%,the 4Cr5MoSiV1 steel has good thermal stability,strength,elongation and reduction of area;and the second phase of quadrilateral TiC with a size of about 50 nm is precipitated after tempering.When the titanium content is 0.54 mass%,the irregular TiC particles with a size of about 300 nm are precipitated at the trigeminal grain boundary,which will have an adverse effect on the thermal stability and mechanical properties of the alloy steel.

关 键 词：钛微合金化 4Cr5MoSiV1Ti 热稳定性 力学性能 显微组织 碳化物 

分 类 号：TG142.3[一般工业技术—材料科学与工程]