对热连轧GH4169合金在固溶处理过程中晶粒长大规律进行了系统的研究。研究结果表明,该合金δ相溶解温度在990~1 000℃之间,δ相对晶粒长大有显著阻碍作用,在低于δ相溶解温度进行固溶处理时,析出的δ相使得晶粒长大缓慢;在高于δ相溶解温度以上时,晶粒随温度的升高快速长大。晶粒长大动力学表明：在高于δ相固溶线温度以上进行固溶处理时,晶粒生长指数随着固溶温度的升高而增加;固溶处理温度为1 000和1 050℃下的晶粒长大激活能为223.849 kJ/mol,晶粒长大机理为自扩散过程控制机理,并建立了相应的晶粒长大动力学方程。
Grain growth behavior and its kinetics during solution treating process of hot continuous rolling（HCR） GH4169 superalloy was investigated.The experimental results show that δ-phase dissolution temperature of HCR GH4169 superalloy is from 990 to 1000℃,and δ-phase in the superalloy greatly restrain grain growth.The solution treatment at temperature below δ-phase dissolution leads to little variation of grain size and solution treatment at temperature above δ-phase dissolution leads to rapid grain growth for HCR GH4169 superalloy.The grain growth kinetics at temperature above δ-phase dissolution shows that grain growth exponentially increases with the increasing solution treating temperature.At the temperatures from 1000 to 1050℃,the activation energy value for grain growth in HCR GH4169 superalloy is 223.849kJ/mol,which means that the grain growth mechanism is self-diffusion-controlling process,and the grain growth kinetics eqution are given.
参考文献
| [1] | Burger J L;Biederman R R;Couts W H.The Effects of Starting Condition on the Aging Response of As-Forged Alloy 718[A].TMS,1989 |
| [2] | 庄景云;杜金辉;邓群.变形高温合金GH4i69[M].北京:冶金工业出版社,2006 |
| [3] | 冶军.美国镍基高温合金[M].北京:科学出版社,1979 |
| [4] | Anelli E .Application of Mathematical Modeling to Hot Roiling and Controlldd Cooling of W Rods and Bars[J].ISIJ International,1992,32:440. |
| [5] | 毛卫民;赵新兵.金属的再结晶与晶粒长大[M].北京:冶金工业出版社,1994 |
| [6] | Sellars C M;Whiteman J A .Recrystallization and Grain Growth in Hot Rolling[J].Metal Science Journal,1979,13(03):187. |
| [7] | Devadas C;Samarasekera I V;Hawboh B.The Thermal and Metallurgical State of Steel Strip During Hot Roiling[A].,1991:335. |
| [8] | Burachy V;Cahoon J R .A Theroy for Solute Impurity Diffusion[J].Metallurgical and Materials Transactions,1997,28A(03):563. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%