研究了热处理温度和保温时间对GH4169合金晶粒长大规律和硬度的影响.结果表明,δ相对晶粒长大有显著阻碍作用,在低于δ相完全溶解温度热处理时,未溶解的δ相使晶粒长大缓慢;在高于δ相完全溶解温度热处理时,合金为单相奥氏体组织,晶粒随温度的升高迅速长大.晶粒长大动力学表明:在热处理温度高于1050℃时的晶粒长大激活能为157.6kJ/mol,晶粒长大机理为Ni基合金的晶界扩散过程所控制,同时也建立了相应的晶粒长大动力学方程.
参考文献
| [1] | 黄乾尧;李汉康.高温合金[M].北京:冶金工业出版社,2000:1-8. |
| [2] | Oblak J M;Pauionis D F;Duvall D S .Coherency strengthening in Ni-bese alloys hardened by DO22 precipitates[J].Metallurgical Transactions(A),1974,5(01):143-153. |
| [3] | 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,1989:207-217. |
| [4] | 鲁风鸣;金槿秀 .GH169合金涡轮盘件长期时效组织稳定性的研究[J].金属学报,1995,31(07):14-16. |
| [5] | 冶军.美国镍基高温合金[M].北京:科学出版社,1979:62-68. |
| [6] | Dong J X;Xie X S;Zhang S H .Coarsening behavior of γn precipitates in modified Inconel 718 superalloy[J].Scripta Materialia,1995,33(12):1933-1939. |
| [7] | Sundararaman M;Mukhopadhyay P;Banerjee S.Precipitation and room temperature deformation behavior of Inconel 718[A].TMS,1994:419-440. |
| [8] | Burke M G;Miller M K.Precipitation in alloy 718:A combined AEM and APFIM investigation[A].TMS,1991:337-350. |
| [9] | Devadas C .The thermal and metallurgical state of steel strip during hot rolling:part 3.Microstructural evolution[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22A:335-342. |
| [10] | Raghunathan N;Sheppard T .Microstructural developmeat during annealing of hot rolled Al2Mg alloys[J].Materials Science and Technology,1986,6:542-547. |
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%