切削時における凝着界面の反応相生成に関する熱力学的検討

概要

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In this study, that was investigated the elements diffusion influence the generation of reaction phases in the adhesion interface of tool material to work material. For the reason mentioned earlier, the cutting test, diffusion bonding test and thermodynamics calculation by Thermo-Calc were carried out to examine the reaction phases in the interface of tool material to work material. The titanium alloys such as commercially pure titanium, Ti-6Al-4V alloy and Ti-3Al-8V-6Cr-4Mo-4Zr alloy (βC Ti) were used as work materials, and the cemented carbide (K10) was used as tool material. From the results of cutting test and diffusion bonding test, a possibility of being decomposed WC into Tungsten and Carbon and being diffused in titanium alloys was shown, and α-titanium phase, β-titanium phase, TiC and η phase were generated in the interface of titanium alloys to cemented carbide. Moreover, it was confirmed that all phases were generated by calculated equilibrium phase diagram of Ti-W-Co-C system using the thermodynamics. In taking account of reaction of Titanium, Tungsten, Cobalt and Carbon elements, since calculated Gibbs free energy was always a value of negative by more than 300 K, TiC was generated. The results of calculation using the thermodynamics are consistent with both cutting test and diffusion bonding test.
近畿大学の論文
2004-12-20