在真空定向凝固炉中采用螺旋选晶法制备了一种镍基单晶高温合金,固溶处理后分别采用1080、1120、1160和1200℃不同的温度进行一次时效,然后在相同工艺下进行二次时效,研究一次时效温度对合金组织和1100℃/140 MPa条件下持久性能的影响.研究表明,随一次时效温度升高,γ'相的尺寸增大,体积分数先增加后减少,在较高温度时效后γ基体通道中有细小的二次γ'相析出,立方化程度先增加后因在1200℃下时效后有部分γ '/γ相界面变为锯齿状而降低.随着一次时效温度提高,合金的持久寿命先增加后降低,在1200℃下时效后持久寿命最低.在1080、1120和1160℃时效后,γ'相在持久过程中形成了完善细密的筏排组织,而在1200℃时效后,γ '相在持久过程中形成了非常不规则的粗化组织.合金在1120℃进行一次时效,合金的组织和持久性能最佳.
参考文献
| [1] | Hegde, S.R.;Kearsey, R.M.;Beddoes, J.C. .Designing homogenization-solution heat treatments for single crystal superalloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(21/22):5528-5538. |
| [2] | Ping Li;Shu-suo Li;Ya-fang Han .Influence of solution heat treatment on microstructure and stress rupture properties of a Ni_3Al base single crystal superalloy IC6SX[J].Intermetallics,2011(2):182-186. |
| [3] | 白雪峰,任英磊,王文珍,金涛.热处理对含铼镍基单晶高温合金显微组织的影响[J].铸造,2006(06):619-622. |
| [4] | Jinjiang Yu;Xiaofeng Sun;Nairen Zhao;Tao Jin;Hengrong Guan;Zhuangqi Hu .Effect of heat treatment on microstructure and stress rupture life of DD32 single crystal Ni-base superalloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):420-427. |
| [5] | G.E. Fuchs .Improvement of Creep Strength of a Third Generation, Single-Crystal Ni-Base Superalloy by Solution Heat Treatment[J].Journal of Materials Engineering and Performance,2002(1):19-25. |
| [6] | 王静,张澜庭,陈科,孙乃荣,单爱党.含铼镍基单晶高温合金阶段时效过程中γ/γ′相的微观组织形貌与化学成分[J].中国有色金属学报（英文版）,2011(07):1513-1517. |
| [7] | Wang W Z;Jin T;Zhao N R et al.Effect of cobalt on chemical segregation and solution process in Re-containing single crystal superalloys[J].Transaction Nonferrous Metal Society of China,2006,16(S):1978-1981. |
| [8] | 陈柏凡,李辉.一种第二代镍基单晶高温合金固溶时效处理工艺的确定[J].机械工程材料,2013(05):18-21,25. |
| [9] | 韩凤奎,燕平,赵京晨.时效热处理对镍基单晶高温合金组织的影响[J].钢铁研究学报,2008(02):44-48. |
| [10] | 任英磊,金涛,管恒荣,胡壮麒.热处理制度对一种单晶镍基高温合金γ′相形貌演化的影响[J].机械工程材料,2001(04):7-10. |
| [11] | 王志辉,赵乃仁,李金国,侯贵臣,金涛,孙晓峰,胡壮麒.热处理工艺对SRR99镍基单晶高温合金组织和性能的影响[J].材料工程,2008(12):46-50. |
| [12] | Murakumo T;Kobayashi T;Koizumi Y et al.Creep behavior of Ni-base single crystal superalloys with various γ' volume fraction[J].Acta Material,2004,52(12):3737-3744. |
| [13] | 冯瑞.金属物理[M].北京:科学技术出版社,1998:492. |
| [14] | 赵坦 .第二代定向柱晶高温合金DZ59研究[D].南京理工大学,2009. |
| [15] | 刘丽荣,金涛,赵乃仁,王志辉,孙晓峰,管恒荣,胡壮麒.热处理对一种镍基单晶高温合金微观组织和持久性能的影响[J].稀有金属材料与工程,2006(05):711-714. |
| [16] | Miyazaki T;Koyama T;Doi M .Effect of coherent strain energy on γ'/γ,phase in Ni-Al-Ti alloys[J].Acta Metallurgical Material,1994,42(10):3417-3424. |
| [17] | Zhang JX;Wang JC;Harada H;Koizumi Y .The effect of lattice misfit on the dislocation motion in superalloys during high-temperature low-stress creep[J].Acta materialia,2005(17):4623-4633. |
| [18] | Murakumo T;Kobayashi T .Creep behaviour of Ni-base single crystal superalloys with various γ' volume fraction[J].Acta Materialia,2004,52:3737-3744. |
| [19] | Hino T;Kobayashi T;Koizumi Y.Development of a new single crystal superalloy for industrial gas turbines[A].Warrendale,PA:TMS Superalloys,2000:729-736. |
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