锻压技术

等温锻造应变速率对机械盘件TC4钛合金力学性能和耐磨损性能的影响

英文标题：Influence of isothermal forging strain rate on mechanical properties and wear resistance properties of mechanical disk for titanium alloy TC4

作者：张在平

单位：常州工程职业技术学院

关键词：机械盘件 TC4钛合金等温锻造应变速率力学性能耐磨损性能

分类号：TG146.2+3 ;TG319

出版年,卷(期):页码：2018,43(7):187-191

摘要：

采用不同的等温锻造应变速率进行了机械盘件TC4钛合金的锻造成形，并进行了室温力学性能和耐磨损性能的测试和分析。结果表明：等温锻造应变速率对机械盘件TC4钛合金的力学性能和耐磨损性能产生明显影响；随等温锻造应变速率从6×10-4 s-1增大到6×10-3 s-1，试样的抗拉强度先减小后增大，断后伸长率和磨损体积先增大后减小；与6×10-4 s-1应变速率相比，采用6×10-3 s-1应变速率的抗拉强度增大了15 MPa，断后伸长率减幅较小，减小了1.9%，磨损体积减小了3×10-3 mm3，试样的力学性能和耐磨损性能均先下降后提高。机械盘件TC4钛合金的等温锻造应变速率优选为6×10-3 s-1。

The mechanical disk parts of titanium alloy TC4 were forged at different isothermal forging strain rates, and the mechanical properties and wear resistance properties at room temperature were tested and analyzed. The results show that the isothermal forging strain rate has a significant influence on the mechanical properties and wear resistance properties of mechanical disk parts for titanium alloy TC4. With the isothermal forging strain rate increasing from 6×10-4 s-1 to 6×10-3 s-1，the tensile strength of sample decreases first and then increases, and the elongation after fraction and wear volume increase first and then decrease. Compared with the strain rate of 6×10-4 s-1, the tensile strength at the strain rate of 6×10-3 s-1 increases by 15 MPa, and the elongation after fraction reduces by 1.9% slightly as well as the wear volume reduces by 3×10-3 mm3. Furthermore, the mechanical properties and wear resistance properties of sample increase first and then decrease, and the optimized isothermal forging strain rate of mechanical disk parts for titanium alloy TC4 is 6×10-3 s-1.

基金项目：

2014年度江苏省高校“青蓝工程”资助项目（ZY6107016）；常州工程职业技术学院科研课题（ZY6107016）

张在平(1974-)，男，硕士，讲师，E-mail：zealping@126.com

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