The Effects of WC on the Microstructures and Wear Resistance of FeCoCrNiB_(0.2) High Entropy Alloy  

作　　者：BAO Yefeng GUO Linpo ZHONG Chonghui XIE Bingqi WANG Zirui SONG Qining JIANG Yongfeng 

机构地区：[1]College of Mechanical and Electrical Engineering,Hohai University,Changzhou,213022,China [2]Zhejiang Sanhua Automotive Components Co.,Ltd,Hangzhou,310018,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第2期416-422,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (No.51879089)。

摘　　要：To improve the wear resistance of the FeCoCrNiB_(0.2)high entropy alloy(HEA),the FeCoCrNiB_(0.2)(WC_(0))and FeCoCrNiB_(0.2)+20wt%WC(WC_(20))HEA coatings were prepared on Q235 steel by laser cladding(LC).The microstructure,hardness,and tribometer of the HEA coatings were investigated using scanning electron microscopy with spectroscopy(SEM/EDS),X-ray diffraction(XRD),vickers microhardness tester,and pin-on-disc tribometer,respectively.The experimental results show that the WC0HEA coating comprises a simple BCC phase mixed with an M_(2)B phase.Adding 20wt%WC,the WC_(20)HEA coating is composed of a simple BCC phase mixed with the Cr_(23)C_(6)carbide phase.The microstructure of the WC_(20)HEA coating is simple,which consists of equiaxed grain and dendritic.The microhardness also increases from 625.5HV to 806.0HV,and the wear mass loss correspondingly decreases from 30.9 to 14.9 mg.W and C atoms formed by WC dissolution are mainly dissolved in the BCC phase,which leads to the solution strengthening effect.Besides,Cr_(23)C_(6)carbides inhibit the growth of the grains,play the role of fine-grain strengthening,and further improve the hardness and wear resistance of the HEA coating.

关 键 词：high-entropy alloys laser processing and cladding MICROSTRUCTURES hardness wear-resistance 

分 类 号：TG139[一般工业技术—材料科学与工程]