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TC8M-1钛合金热变形与热处理性能初探
英文标题:Study on properties of heat deformation and heat treatment for Ti alloy TC8M-1
作者:李亚非 方波 王冠 马文革 张平辉 
单位:中航工业贵州航空发动机研究所 中航工业沈阳黎明航空发动机有限公司 西部超导科技发展有限公司 宝鸡钛业集团 
关键词:TC8M-1钛合金 锻造 热处理 显微组织 
分类号:TG166.5;TG319
出版年,卷(期):页码:2015,40(2):127-132
摘要:
为探究TC8M-1钛合金的热加工特性与热处理特性,选择910 ℃时、5%,15%,30%,50%和70%形变量锻造锻坯,观测锻坯显微组织。并分别与890及930 ℃时、40%变形量的锻坯显微组织进行对比。另外,还进行了热处理工艺试验探索。结果表明:TC8M-1钛合金塑性优良,锻造温度区间较宽。910 ℃温度下一火次变形量可达70%,但变形量超过50%后将出现细晶区域。40%变形量、930 ℃温度下的组织初生α相出现球化;40%变形量、890 ℃温度下的组织初生α相保留塑性变形痕迹。为兼顾室温拉伸强度与450 ℃高温的持久强度,TC8M-1钛合金适宜的热处理制度为:930 ℃/2 h+空冷;590 ℃/1 h+空冷。
 

 

Ti alloy TC8M-1 under the deformation rates of 5%,15%,30%,50% and 70% at 910 ℃ was forged respectively for testing its properties of heat deformation and heat treatment. Microstructure was observed and compared with the ones which were observed under the deformation rate of 40% at 890℃ and 930 ℃ respectively. Finally heat treatment experiments were carried out. The results show that TC8M-1 alloy is of good plastic deformation properties and wide forging temperature range. When the forging temperature is at 910 ℃, the deformation rate shoots up to 70% at once heat treatment. However, fine microstructure areas are found when the deformation rate exceeds 50%. Under the condition of deformation rate 40%,primary α phase is spheroidized at 930 ℃, and primary α phase is kept plastic deformation at 890 ℃. Thus, suitable heat treatment condition of Ti alloy TC8M-1 is under cooling for two hours at 930 ℃ or cooling for an hour at 590 ℃ to meet the tensile strength at room temperature and enduring strength at 450 ℃.
基金项目:
江苏省自然科学基金资助项目(BK2005128)
作者简介:
李亚非(1986-),男,硕士,工程师
参考文献:

 
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