DD407FGH95合金热等静压扩散连接反应层元素互扩展规律I.扩散连接模型的建.pdf

49 9 2013 9 1041—1050 ACTA METALLURGICA SINICA Sept. 2013 –1050 DD407/FGH95 ? I. ( , 100083) ( , 100081) , DICTRA Thermal–Calc , , . : , . DD407/FGH95 , 1120—1210 . , 1120 3—5 h, 1170 1210 1—3 h. DD407/FGH95 , DICTRA , , A 0412?1961(2013)09?1041?10 ELEMENTS DIFFUSION LAWOF DD407/FGH95 DIFFU- SION BONDING UNDER HOT ISOSTATIC PRESSING I. Building Di?usion Bonding Model YAO Yao, YE Jianshui, DONG Jianxin, YAO Zhihao, ZHANG Maicang School of Materials Science and Engineering, University ofScience and Technology Beijing, Beijing 100083 GUO Weimin Central Iron & Steel Research Institute, Beijing 100081 Correspondent: DONG Jianxin, professor, Tel: (010)62332884, E-mail: ******@ustb. Supported by National Basic Research Program of China (No. 2010CB631200) Manuscript received 2013–03–04, in revised form 2013–06–29 ABSTRACT Turbine platform and blade are two main parts of aero engines and gas turbines. Due to di?erent requirements in practice, platforms are always fabricated by single crystal superalloys, which have high temperature strength and resistance to hot corrosion and oxidation. The platforms employed at relatively lower temperatures can be made of powder superalloys. Therefore there is a great demand for bonding single crystal superalloys to powder superalloys. Because of high content ofγ′forming elements, traditional fusion welding methods employe