Ti含量对高Ti马氏体耐磨钢组织与性能的影响  

Effect of Ti content on microstructure and properties of martensitic wear resistant steel with high Ti

作　　者：刘海生[1] 张晓娟[1] 苑少强[1] 李雷雷 武会宾 杨跃辉[1] Liu Haisheng;Zhang Xiaojuan;Yuan Shaoqiang;Li Leilei;Wu Huibin;Yang Yuehui(Key Lab of Intelligent Equipment Digital Design and Process Simulation,Hebei Province,Tangshan University,Tangshan Hebei 063000,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]唐山学院河北省智能装备数字化设计及过程仿真重点实验室,河北唐山063000 [2]北京科技大学钢铁共性技术协同创新中心,北京100083

出　　处：《金属热处理》2023年第1期35-39,共5页Heat Treatment of Metals

基　　金：唐山市科技创新团队培养计划(20130209D)。

摘　　要：测定了0.31%Ti和0.55%Ti两种高Ti低合金马氏体耐磨钢的力学性能及耐磨性,并使用扫描电镜、夹杂物自动扫描系统对其显微组织进行了分析,进而讨论了高Ti钢中Ti含量对组织和性能的影响。结果表明,与含Ti量0.31%时相比,含Ti量达到0.55%时,基体中有更多的TiC颗粒析出,降低了基体的C当量,导致淬火后钢的抗拉强度明显较低,但更多TiC的析出也产生更为明显的析出强化效果,使得两种钢的屈服强度和硬度较为接近。另一方面,含Ti量较高时钢中微米级的TiC颗粒相应增加,显著提高了钢的耐磨性能。Mechanical properties and wear resistance of low alloy martensitic wear resistant steels with 0.31%Ti and 0.55%Ti were measured,and the corresponding microstructure was analyzed by SEM and inclusion automatic scanning system,then the effect of Ti content in the steel on microstructure and properties was discussed.The results show that compared with the steel containing 0.31%Ti,the steel containing 0.55%Ti has more precipitation of TiC particles,which reduces the C equivalent of the matrix,resulting in a significantly lower tensile strength of the quenched steel,but more TiC precipitation also produces stronger precipitation strengthening,which makes the yield strength and hardness of the two steels close to each other.On the other hand,when the Ti content is higher,the micron-sized TiC particles in the steel increase correspondingly,which significantly improves the wear resistance of the tested steel.

关 键 词：耐磨钢 马氏体钢 微米级TiC 耐磨性能 

分 类 号：TG162[金属学及工艺—热处理]