Machinability investigations in cryogenic internal cooling turning Ti-6Al-2Zr-1Mo-1 V titanium alloy

The International Journal of Advanced Manufacturing Technology - Tập 120 - Trang 7565-7574 - 2022
Yongquan Gan1, Yongqing Wang1, Kuo Liu1, Yuebing Yang1, Shaowei Jiang1, Yu Zhang1
1Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, China

Tóm tắt

Because of its outstanding strength-to-density ratios, corrosion resistance, and other superior properties, Ti-6Al-2Zr-1Mo-1 V titanium alloy (TA15) is widely employed in aeronautics and astronautics. TA15 is a typical difficult-to-cut material with low heat conductivity, a high cutting temperature, and an easy adhesion characteristic. When machining difficult-to-cut materials, cryogenic machining is an efficient way to lower the cutting temperature. There is, however, few research on machining TA15 under cryogenic cooling conditions. In this study, tensile tests were performed under different low-temperature cooling conditions. By analyzing the changes of material properties under different low temperatures, the machining mechanism of TA15 under cryogenic cooling conditions was revealed. Then, cutting experiments were carried out under three cooling conditions: dry, cutting fluid (wet), and liquid nitrogen internal cooling (cryogenic). The results show that under cryogenic conditions, TA15 can effectively reduce plasticity and adhesion. The cutting experiments also prove that machining TA15 under the cryogenic cooling condition can reduce the surface adhesion, improve the machining quality of the machined surface, and effectively reduce the generation of tool adhesion wear.

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The International Journal of Advanced Manufacturing Technology

Tập 120

7565-7574

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