TiB_(2)含量对基于PLC控制的激光选区熔化成形TiB_(2)/4Cr13钢复合材料组织与性能的影响  

Effect of TiB_(2) Content on Microstructure and Properties of TiB_(2)/4Cr13 Steel Composites by Selective Laser Melting Forming Based on PLC Control

作　　者：张冬梅[1] 李恒 邢峰 ZHANG Dongmei;LI Heng;XING Feng(Department of Electronic Engineering,Zhengzhou Professional Technical Institute of Electronics and Information,Zhengzhou 451450,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州电子信息职业技术学院电子工程学院,郑州川451450 [2]郑州大学材料科学与工程学院,郑州450001

出　　处：《机械工程材料》2024年第1期66-73,共8页Materials For Mechanical Engineering

基　　金：河南省科技攻关项目(212102210530)。

摘　　要：采用机械球磨和激光选区熔化成形方法,制备了不同TiB_(2)质量分数(0.6%,1.2%,1.8%)的TiB_(2)/4Cr13钢复合材料,研究了TiB_(2)含量对复合材料物相组成、微观形貌、硬度、耐磨性能和耐腐蚀性能的影响。结果表明:复合材料由α-Fe、γ-Fe、TiB_(2)等相组成;随着TiB_(2)含量的增加,复合材料的相对密度降低;当TiB_(2)质量分数为0.6%时,复合材料的组织最为细小均匀,随着TiB_(2)含量的继续增加,晶粒尺寸增大,且组织中出现裂纹、微孔等缺陷;随着TiB_(2)含量增加,复合材料的硬度降低,摩擦因数和磨损率增大,点蚀和自腐蚀电位降低,自腐蚀电流密度增大,耐腐蚀性能变差。TiB_(2)/4Cr13 steel composites with different mass fractions(0.6%,1.2%,1.8%)of TiB_(2) were prepared by mechanical ball milling and selective laser melting forming,and the effects of TiB_(2) content on the phase composition,microstructure,hardness,wear resistance and corrosion resistance of the composites were studied.The results show that the composite containedα-Fe,γ-Fe and TiB_(2) phases.With the increase of TiB_(2) content,the relative density of the composite decreased.When the mass fraction of TiB_(2) was 0.6%,the microstructure of the composite was the most fine and uniform.With the increase of the content of TiB_(2),the grain size increased,and cracks,micropores and other defects appeared in the microstructure.With the increase of TiB_(2) content,the hardness of the composites decreased,the friction coefficient and wear rate increased,the pitting and free-corrosion potential decreased,and the free-corrosion current density increased,indicating that the corrosion resistance decreased.

关 键 词：TiB_(2)/4Cr13钢复合材料 激光选区熔化 TiB_(2)含量 组织 性能 

分 类 号：TB333[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属切削加工及机床]