Formation of ceramic-metal composite layers on die steels by electron beam irradiation

作     者：Takahiro Akao Yuki Sakurai Tetsuhiko Onda Kazutake Uehara Zhongchun Chen Takahiro Akao;Yuki Sakurai;Tetsuhiko Onda;Kazutake Uehara;Zhongchun Chen

作者机构：Department of Mechanical and Aerospace Engineering Graduate School of EngineeringTottori University Koyama - minami d - 101 Tottori 680 - 8552 Japan Next Generation Advanced Medical Promotion Center Tottori University Hospital Nishi - cho 36 - 1 Yonago Tottori 683 - 8504 Japan 

出 版 物：《材料与冶金学报》 (Journal of Materials and Metallurgy)

年 卷 期：2015年第14卷第2期

页      面：152-158页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：AMADA基金(AF-2012012) Acknowledgements The authors greatly appreciate Mr. Takuya Kawamura and Mr. Takaki Oka for their experimental assistances 

主　　题：surface modification die steel composite layer electron beam irradiation 

摘      要：Surface modifications,which result in formation of a hard layer such as CrN,TiN,TiCN etc. on tool surfaces,have been widely utilized in machining tools. How ever,the hard layer has clear interface with the matrix,thereby the delamination between the hard layer and matrix often occurs because of a mismatch of the thermal expansion coefficients. A composite layer with complicated interfaces between hard material and matrix is desired to avoid such a delamination due to a complicated interface existed between workpiece and coating materials. In this study,the formation of ceramic- metal composite layers on the surfaces of die steels by an electron beam( EB) irradiation technique has been investigated. When WC- Co powder was embrocated onto the substrate surfaces,a composite layer of WC- Co and matrix was formed through solidification after the irradiation-induced melting. The composite layer shows a marble- like texture with WC- rich regions. The hardness of the layer reaches up to 1000 HV. For other ceramic pow ders such as TiN and SiC,only small amount of particles has been incorporated into the composite layer,resulting in a relatively low hardness enhancement after the EB irradiation.