切削時を考慮した各種Ti合金と超硬合金との接合性 : 切削過程における凝着機構に関する研究(第1報)

概要

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The purpose of this study is to make clear the mechanism of adhesion of cutting tool to metals which causes the deterioration of tool life. Various titanium alloys such as commercially pure titanium, Ti-6Al-4V alloy and βC-Ti alloy were used as a work materials, and the cemented carbide (K10) was used as a cutting tool. Both a short-time cutting test and a diffusion bonding test were carried out to investigate the properties of adhesion, the bondability and the form of reaction phases between the cutting materials and tool. The cutting test showed that βC-Ti was most prone to adhere to K10 comparing with Ti and Ti-6Al-4V. According to the bonding test of the titanium alloys to the cemented carbide at a bonding temperature of 1473 K, they were bonded even for a bonding time less than 1 s forming reaction phases at the interface. These reaction phases consisted of the titanium carbide and η phase (Co_2W_4C, Co_3W_3C) for all titanium alloys used. However, the morphologies of titanium carbide were massive for Ti, hump for Ti-6Al-4V alloy and layered type for βC-Ti alloy. From these results, it can be concluded that the properties of adhesion of the titanium alloys to the cemented carbide are related to the bonding strength of joint.
社団法人溶接学会の論文
2000-05-05