Thermal residual stress analysis of diamond coating on graded cemented carbides  

作　　者：黄自谦 贺跃辉 蔡海涛 武从海 肖逸锋 黄伯云 

机构地区：[1]State Key Laboratory of Powder Metallurgy,Central South University [2]School of Mathematical Science and Computing Technology,Central South University [3]College of Science,Henan University of Science and Technology

出　　处：《Journal of Central South University of Technology》2008年第2期165-169,共5页中南工业大学学报（英文版）

基　　金：Project(50323008) supported by the National Natural Science Foundation of China

摘　　要：Finite element model was developed to analyze thermal residual stress distribution of diamond coating on graded and homogeneous substrates. Graded cemented carbides were formed by carburizing pretreatment to reduce the cobalt content in the surface layer and improve adhesion of diamond coating. The numerical calculation results show that the surface compressive stress of diamond coating is 950 MPa for graded substrate and l 250 MPa for homogenous substrate, the thermal residual stress decreases by around 24% due to diamond coating. Carburizing pretreatment is good for diamond nucleation rate, and can increase the interface strength between diamond coating and substrate.Finite element model was developed to analyze thermal residual stress distribution of diamond coating on graded and homogeneous substrates.Graded cemented carbides were formed by carburizing pretreatment to reduce the cobalt content in the surface layer and improve adhesion of diamond coating.The numerical calculation results show that the surface compressive stress of diamond coating is 950 MPa for graded substrate and 1 250 MPa for homogenous substrate,the thermal residual stress decreases by around 24% due to diamond coating.Carburizing pretreatment is good for diamond nucleation rate,and can increase the interface strength between diamond coating and substrate.

关 键 词：graded cemented carbides diamond coating finite element method CARBURIZING 

分 类 号：TB115[理学—数学]