机加工用硬质合金刀具材料粘结相的相变  

Phase Transformation of Binder Phase in Hard Alloy Tool Material for Machining Applications

作　　者：何冠宇 HE Guan-yu(Guiyang Vocational and Technical College,Guiyang 550081,China;Guizhou University,Guiyang 550025,China)

机构地区：[1]贵阳职业技术学院,贵州贵阳550081 [2]贵州大学,贵州贵阳550025

出　　处：《机械工程与自动化》2024年第4期114-116,共3页Mechanical Engineering & Automation

摘　　要：由于机加工用硬质合金刀具材料中粘结相存在面心立方和密排六方这两种不同的相结构,而不同的相结构其力学性能差异较大,因此,为优化刀具综合力学性能和服役寿命,通过制备不同钴含量的梯度硬质合金,对制备后的梯度硬质合金不同钴含量的位置进行残余应力测量和粘结相EBSD检测方法分析粘结相相变的条件。研究结果表明:在高残余应力的区域,粘结相主要以面心立方的形式存在;而在低应力的区域,粘结相主要以密排六方的形式存在。In the cemented carbide tool materials for machining,there are two different binder phase structures:face-centered cubic phase and closely packed hexagonal phase structure,and the mechanical properties of different phase structures are quite different.Therefore,in order to optimize the comprehensive mechanical properties and service life of the tool,the gradient cemented carbide with different cobalt content was prepared,and the residual stress and binder phase EBSD of the prepared gradient cemented carbide were measured,and the conditions of binder phase transformation were analyzed by this method.The results show that in the region of high residual stress,the binder phase mainly exists in the form of face-centered cubic;while in the region of low stress,the binder phase mainly exists in the form of hexagonal close-packed.

关 键 词：机加工用硬质合金 粘结相 面心立方 密排六方 

分 类 号：TG711[金属学及工艺—刀具与模具]