用光学显微镜、扫描电子显微镜和电子万能试验机研究了等轴组织的TC11钛合金1000℃压缩变形及随后热处理对材料的微观组织和室温力学性能的影响.实验结果表明:锻造态的局部区域被拉长的等轴α相经过高温压缩水淬后等轴组织有恢复的趋势,再分别经过950℃×1h水冷+560℃×6h后空冷(淬火+人工时效)和950℃×1h空冷+560℃×6h后空冷(双重退火)处理的材料,等轴组织恢复的趋势更明显,且等轴α相数量增多;β相内析出片状α相变多变大;双重退火处理后β相内析出的α片层更厚,更长,数量更多.经过淬火+人工时效处理的材料抗拉强度与屈服强度分别达到1300MPa和1152MPa,与水淬的材料相比分别提高14.8%和16.8%;经过双重退火处理的材料强度达到1176MPa,伸长率达到15.95%,具有良好的综合力学性能.
参考文献
| [1] | 王金友;葛志明.航空用钛合金[M].上海:上海科学技术出版社,1985 |
| [2] | ZHOU Y C;ZENG W D;YU H Q .A new high-temperature deformation strengthening and toughening process for titanium alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2003,221:58-62. |
| [3] | Semiatin SL;Weiss I;Seetharaman V .Flow behavior and globularization kinetics during hot working of Ti-6Al-4V with a colony alpha microstructure[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(2):257-271. |
| [4] | 周义刚,曾卫东,俞汉清.近β锻造推翻陈旧理论发展了三态组织[J].中国工程科学,2001(05):61-66. |
| [5] | Prasad YVRK.;Seshacharyulu T. .Processing maps for hot working of titanium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):82-88. |
| [6] | Ding R.;Guo Z.;Wilson A. .Microstructural evolution of a Ti-6Al-4V alloy during thermomechanical processing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(2):233-245. |
| [7] | 邹清燕,蔡俊哲,贾东明,庞灵英.TC11棒材初生α含量与热处理温度的关系[J].钛工业进展,2001(01):43-45. |
| [8] | 曹晓卿 .变形温度、变形程度与退火方式对TC11钛合金显微组织的影响[J].太原工业大学学报,1997,28(03):23-26. |
| [9] | 周义刚;曾卫东;李晓芹 等.钛合金高温形变强韧化机理[J].金属学报,1999,35(01):47. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%