Investigation into the tribological behaviors of press hardening steels on the tailored conditions  

作　　者：WANG ZiJian LUO XiaoYu HE WenTing ZHANG YiSheng 

机构地区：[1]State Key Laboratory of Material Processing and Die and Mould Technology, College of Materials Science and Engineering, Huazhong University of Science & Technology

出　　处：《Science China(Technological Sciences)》2015年第1期97-106,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51275185 and 51405171);the National Basic Research Program of China("973"Project)(Grant No.2010CB630802-3);the Fundamental Research Funds for the Central Universities(HUST,No0118110621);the Graduate Innovation and Entrepreneurship Fund of Huazhong University of Science and Technology(HUST,No.0109070112)

摘　　要：There has been a growing demand for safety parts with tailored properties in automobile industry.However,the understanding of tribological behavior of press hardening steels(PHS)on the tailored conditions is highly inadequate.The present work aims at creating new knowledge about the tribological characteristics of PHS on the tailored conditions and bridging this existing gap.The paper proposes an improved hot drawing tribo-simulator to simulate the realistic experimental conditions industry.Investigations were carried out on the condition of different initial heating temperatures,tool temperatures,austenitizing temperatures,cooling rates and microstructures.The presented results show that the whole frictional process is divided into three stages for both coated and uncoated steels.The frictional factor changes a lot and the peak value of frictional factor occurs for serious adhesive wear.The frictional factor rises as the tool temperature and austenitizing temperature rise.The surface morphology of tools indicates that the coating adhering to tool gets thicker as the tool temperature increases.With the increase of cooling rate,the frictional factor declines firstly and then rises to some extent.Flat dies with different temperatures are used to form specimens with different microstructures,which also affects the frictional factor and wear.

关 键 词：frictional factor press hardening steel（PHS） adhesive wear tribological behavior 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TH117.1[金属学及工艺—金属材料]