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首页> 外文期刊>精密工学会誌 >Fundamental Study on Adhesion Mechanism of Difficult-to-Machine Materials during Cutting (2nd Report) - Effect of Reaction Layer on Diffusion Bondability between Various Titanium Alloys and Cemented Carbide -
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Fundamental Study on Adhesion Mechanism of Difficult-to-Machine Materials during Cutting (2nd Report) - Effect of Reaction Layer on Diffusion Bondability between Various Titanium Alloys and Cemented Carbide -

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In this study, in order to clarify the cause of the difference of adhering phenomenon between various titanium alloys and cemented carbide (K10) in cutting process, diffusion bonding joint of these alloys was produced, and the relationship between high-temperature bending strength of the joint and form of reaction phases in bonded interface was examined. Though the diffusion bonding was done in temperature range from 1073K to 1473K and for the holding time of Os on either titanium alloy, titanium carbide was formed as reaction phase. At Ti, Ti-6Al-4V and βC-Ti, forms of titanium carbide were massive, hump and layered types, respectively. As a result of 4 point bending test of bonded joint of each alloy at the testing temperature of 1373K, βC-Ti was high in comparing the bending strength with Ti and Ti-6Al-4V. As a result of observing the rupture position of test piece for bend test, in Ti, Ti-6Al-4V and βC-Ti, the rupture occurred in Ti inside, interface between reaction phase and Ti and cemented carbide inside, respectively. From the result of the diffusion bonding, the reason why βC-Ti is easy to adhere by the cutting process is because in βC-Ti, it forms the layered titanium carbide phase between the cemented carbide, and because it becomes a firm bonded joint.

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