高压热处理对TC9钛合金显微组织和力学性能的影响  

Effect of High Pressure Heat Treatment on Microstructure and Mechanical Properties of TC9 Titanium Alloy

作　　者：张大磊[1] 李媛媛[1] ZHANG Dalei;LI Yuanyuan(Department of Electromechanical Engineering,Qinhuangdao Vocational Technological College,Qinhuangdao 066100,China)

机构地区：[1]秦皇岛职业技术学院机电工程系,秦皇岛066100

出　　处：《机械工程材料》2021年第8期72-76,共5页Materials For Mechanical Engineering

摘　　要：在温度920~980℃、压力1~6 GPa下对TC9钛合金进行高压热处理,研究了高压热处理后的显微组织、硬度、抗压强度和抗塑性变形能力,并与950℃常压退火后的进行了对比。结果表明:高压热处理后TC9钛合金组织中的α相较950℃常压退火后的明显细化,且在温度950℃、压力3 GPa下α相最细小;在温度950℃、压力3 GPa下热处理后,钛合金中形成了细小块状α相和细针状α′马氏体,合金的硬度、室温抗压强度和500℃下抗压强度分别较950℃常压退火处理后的提高了12.95%,7.33%,8.89%,抗塑性变形能力提高。High pressure heat treatments at temperatures of 920-980℃and pressures of 1-6 GPa were conducted on TC9 titanium alloy.The microstructure,hardness,compressive strength and plastic deformation resistance of the alloy after high pressure heat treatments were studied and were compared with those after normal pressure annealing at 950℃.The results show that theαphase in the microstructure of the TC9 titanium alloy was significantly refined after high pressure heat treatment compared with that after normal pressure annealing at 950℃,and was the smallest in size at temperature of 950℃and pressure of 3 GPa.After heat treatment at 950℃and a pressure of 3 GPa,the small blockyαphase and fine needle-shapedα′martensite were formed in the titanium alloy.Moreover,the hardness and the compressive strength at room tempearature and at 500℃of the alloy increased by 12.95%,7.33%and 8.89%those after normal pressure annealing at 950℃,respectively,and the plastic deformation resistance was improved.

关 键 词：TC9钛合金 高压热处理 组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]