The effect of direct ageing treatment on microstructure and stressrupture properties of GH761 alloy was studied. Phosphorus was added to the tested alloy for its beneficial effect on stressrupture life. It was found that the grain size of the tested alloy became much finer after direct ageing treatment, in comparison with the commercial GH761 alloy under standard heat treatment condition. The optimum direct ageing treatment has been determined as follows: 830 ℃×4 h, air cooling+720 ℃×24 h, air cooling. After such treatment, the higher stressrupture properties of the test alloy at 650 ℃, 690 MPa were obtained. The role of phosphorus is still effective under the condition of direct ageing treatment.
参考文献
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%