钛合金离子渗氮表面完整性研究
发布时间：2019-03-10 18:49
【摘要】：对Ti-6Al-4V钛合金真空离子渗氮层的表面完整性进行测试。分析了渗氮温度、时间等工艺参数对渗层表面粗糙度、残余应力等的影响规律和机制。研究表明,在650~900℃范围内,随着渗氮温度的升高和渗氮时间的增加,表面粗糙度总体呈现增加的趋势。其中,渗氮温度从700℃增加到750℃,渗氮层表面粗糙度大幅增加,残余应力转变为残余压应力,且应力绝对值显著增加。证明钛合金反应扩散渗氮机制启动温度在700~750℃范围内,从而,钛合金离子渗氮适合的温度应大于750℃。同时表明,钛合金渗氮层表面完整性与反应扩散渗氮行为密切相关。在渗氮温度不高于850℃,渗氮时间不超过16 h的条件下,因渗氮引起的表面粗糙度增加不超过0.3μm,渗层表面残余压应力可达-500 MPa。
[Abstract]:The surface integrity of vacuum ion nitriding layer of Ti-6Al-4V titanium alloy was tested. The influence and mechanism of nitriding temperature and time on surface roughness and residual stress of nitriding layer were analyzed. The results show that the surface roughness increases with the increase of nitriding temperature and nitriding time in the range of 650 鈩，
本文编号：2437900
[Abstract]:The surface integrity of vacuum ion nitriding layer of Ti-6Al-4V titanium alloy was tested. The influence and mechanism of nitriding temperature and time on surface roughness and residual stress of nitriding layer were analyzed. The results show that the surface roughness increases with the increase of nitriding temperature and nitriding time in the range of 650 鈩，
本文编号：2437900
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2437900.html
