轧制温度对Ti650高温钛合金棒材组织性能的影响-中国材料进展

文章信息/Info

Title:: Effect of Rolling Temperature on Microstructure and Properties of Ti650 High Temperature Titanium Alloy Bar

作者:: 钱坤; 张国君; 王晓; 辛社伟; 周伟; 侯红苗; 1. 西安理工大学材料科学与工程学院，陕西西安 710048 2. 西北有色金属研究院，陕西西安 710016

Author(s):: QIAN Kun; ZHANG Guojun; WANG Xiao; XIN Shewen; ZHOU Wei; HOU Hongmiao; 1. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China 2. Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Keywords:: Ti650 titanium alloy; microstructure; texture; tensile properties; high temperature creep

摘要:: 研究了轧制温度对Ti650合金拉伸及蠕变性能的影响。采用光学显微镜分析了不同轧制温度对合金等轴α相及次生α相形貌、含量的影响；使用EBSD分析技术对轧制后的合金的晶体取向进行表征。结果表明：随着轧制温度的升高，Ti650合金强度逐渐增加，塑性变化不大；初生α相、次生α相、织构等均会对Ti650合金拉伸性能产生影响；Ti650合金的高温蠕变性能与轧制温度升高导致的初生α相含量和尺寸及次生α相片层厚度有关，随着轧制温度升高蠕变残余应变表现出先降低后升高的趋势，在1000 ℃轧制时抗蠕变性能最佳。

Abstract:: The effect of rolling temperature on the tensile and creep properties of Ti650 alloy was studied. The effects of different rolling temperatures on the morphology and content of equiaxed α phase and secondary α phase were analyzed by optical microscope. EBSD analysis technique was used to characterize the crystal orientation of Ti650 alloy after rolling. The results show that with the increase of rolling temperature, the strength of Ti650 alloy increases gradually, and the plasticity changes little. Primary α phase, secondary α phase and texture all affect the tensile properties of Ti650 alloy. The high temperature creep properties of Ti650 alloy are related to the content and size of primary α phase and the thickness of secondary α phase lamellar. The residual creep strain shows a trend of increasing first and then decreasing with the increase of rolling temperature, and the creep performance is the best when rolling at 1000 ℃．