摘要
采用激光熔覆的方法在高速钢刀具4Cr5MoSiV1钢表面制备了不同TiC体积分数的复合熔覆层,对比分析了4种复合熔覆层的显微形貌、常温拉伸力学性能和断口形貌。结果表明,随着熔覆层中TiC体积分数的增加,熔覆层试样的屈服强度逐渐增加,断后伸长率逐渐降低,7.5%TiC时抗拉强度取得最大值,继续增加TiC体积分数,熔覆层试样的抗拉强度反而会降低;随着熔覆层中TiC增加,试样的断裂形式从韧性断裂转变为脆性断裂。
Composite coatings with different TiC volume fraction were prepared on high speed steel tool 4Cr5MoSiV1 steel surface by laser cladding method, the microstructure, tensile properties and fracture morphology of four kinds of composite cladding were investigated. The results show that the yield strength of cladding samples gradually increase, the elongation decrease with the increase of the volume fraction of TiC in the cladding layer. While the tensile strength reaches the maximum value in the TiC volume fraction of 7.5%, the tensile strength of cladding samples will reduce with the increase of volume fraction of TiC; With the increase of the volume fraction of TiC in the cladding layer, the fracture form of the sample will be changed from ductile fracture to brittle fracture.
作者
许兵
廉冰娴
韩俊霞
XU Bing1, LIAN Bingxian1, HAN Junxia2(1. Department of Mechanical Engineering, Shanxi Institute of Mechanical and Electrical Engineering, Changzhi 046000, China; 2. Department of Materials Engineering, Shanxi Institute of Mechanical and Electrical Engineering, Changzhi 046000, Chin)
出处
《铸造技术》
CAS
2018年第3期707-710,共4页
Foundry Technology
关键词
高速钢刀具
激光熔覆
H13
TIC
显微形貌
high speed steel cutting tools
laser cladding
H13
TiC
microstructure
