Microstructure and properties of YG8 cemented carbide with different pulse currents  

作　　者：Liao Wei Yi Yang Gang Yang 

机构地区：[1]School of Mechanical Engineering,Sichuan University,Chengdu 610065,China [2]College of Arts and Sciences,Guangxi Radio and TV University,Nanning 530022,China

出　　处：《Rare Metals》2020年第5期597-606,共10页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51575369 and 51675357)。

摘　　要：In order to study the effect of pulse current treatment on the mechanical properties,microstructure and cutting performance of YG8 cemented carbide,experiments were carried out by using self-made pulse current treatment device to treat cemented carbide samples with different current densities(J=5,10 and 15 A·mm^-2)After the treatment of pulse current,when the current density increased from 5 to 15 A·mm-2,the hardness of the sample was improved to HV 1605,HV 1629 and HV 1653from HV 1574;the transverse rupture strengths of the sample were 2136,2289 and 2364 MPa,which were all higher than that of the untreated sample(2062 MPa)increasing by 3.6%,11.0%and 14.6%,respectively;the corresponding cutting performance was increased by10.1%,13.9%and 19.4%,compared to that of the untreated tool.The tool’s life was also improved.After the treatmen of pulse current,pulse current provided the driving force for dislocation motion,making it more likely for the dislocation to multiply and slip,the dislocation density was increased,and the mechanical properties were significantly improved.

关 键 词：Pulse current YG8 cemented carbide MICROSTRUCTURE Mechanical properties Cutting performance 

分 类 号：TG135.5[一般工业技术—材料科学与工程] TG506[金属学及工艺—合金]