摘要
利用扫描电镜、透射电镜、X射线衍射、金相观察和力学测试等方法研究了700℃固溶后不同时效温度处理对钛合金微观组织、硬度及拉伸力学性能的影响。结果表明:经450~550℃时效处理后,钛合金显微组织包括β相以及在晶界上密集析出呈交错细线形状的α相;550℃时效处理后,钛合金析出的α相较450℃时更长且更宽,α相由细线形状长大变粗。经不同时效温度处理后钛合金含有稳定的α相和β相,β相衍射强度随着时效温度的升高逐渐增大。钛合金析出α相的数量随着时效时间的延长而增多。时效温度由450℃升高至490℃时,钛合金的屈服强度略有上升,抗拉强度变化不大,时效温度降低至390℃时,抗拉强度达到1442.6 MPa。钛合金在450℃时效温度处理下的硬度值达到最大。
The influences of different aging temperature treatments after solution at 700℃on the microstructure,hardness and tensile me-chanical properties of titanium alloy were studied by scanning electron microscopy,transmission electron microscopy,X-ray diffraction,metallographic observation and mechanical testing.The results show that after aging treatment at 450-550℃,the microstructure of titani-um alloy includesβphase andαphase which is densely precipitated on the grain boundary with the shape of staggered fine lines.After aging treatment at 550℃,αphase precipitated in titanium alloy is longer and wider than that at 450℃,andαphase grows from a fine line shape to coarse one.After treatment at different aging temperatures,titanium alloy contains stableαandβphases,and the diffraction intensity ofβphase gradually increases with the increasing of aging temperature.The number of precipitatedαphase in titanium alloy in-creases with the extension of aging time.When the aging temperature increases from 450℃to 490℃,the yield strength of titanium alloy increases slightly,and the tensile strength changes little.When the aging temperature decreases to 390℃,the tensile strength reaches 1442.6 MPa.The hardness value of titanium alloy reaches the maximum at the aging temperature 450℃.
作者
周平
熊淑秋
周林
安文俊
Zhou Ping;Xiong Shuqiu;Zhou Lin;An Wenjun(Intelligent Manufacturing Industry College,Jiangxi University of Engineering,Xinyu 338000,China)
出处
《锻压技术》
北大核心
2025年第6期180-186,共7页
Forging & Stamping Technology
基金
江西省教育厅科学技术研究项目(GJJ2203018)。
关键词
钛合金
时效温度
时效时间
微观组织
力学性能
硬度
titanium alloy
aging temperature
aging time
microstructure
mechanical properties
hardness
