一种镍基单晶高温合金的表面再结晶研究

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材料工程 ›› 2001, Vol. 0 ›› Issue (10) : 5-8.

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研究与应用

一种镍基单晶高温合金的表面再结晶研究

卫平, 李嘉荣, 钟振纲

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Study on The Surface Recrystallization of a Ni-based Single Crystal Superalloy

WEI Ping, LI Jia-rong, ZHONG Zhen-gang

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摘要

采用X射线衍射、金相及扫描电镜,研究了一种镍基单晶高温合金再结晶的产生以及再结晶层的组织变化。结果表明在铸态γ′相溶解温度以下,再结晶是以不连续的胞状形式发生的;在此温度以上,再结晶主要形成再结晶晶粒。进一步提高温度,再结晶晶粒聚集长大,再结晶层以连续的方式向内生长。铸态γ′相的溶解是形成再结晶晶粒的重要条件。

Abstract

The formation and microstructure change of recrystallization of a nickel-base single crystal superalloy are studied by X-ray,optical microscopy and SEM. It is shown that, at the temperature up to as-cast γ′ phase solvus, cellular discontinuous recrystallization may be observed; and above this temperature, rapid recrystallization occurs in the surface layers through the growth of recrystallization grain. With increasing temperature, recrystallization grains begin to congregate and grow larger. The recrystallization layer develop inward continunally, and the thickness of recrystallization layer increases with the increasement of testing temperature. Dissolution of as-cast γ′ phase is importanty factor of formation of recrystallization grains.

导出引用

卫平, 李嘉荣, 钟振纲. 一种镍基单晶高温合金的表面再结晶研究[J]. 材料工程, 2001, 0(10): 5-8

WEI Ping, LI Jia-rong, ZHONG Zhen-gang. Study on The Surface Recrystallization of a Ni-based Single Crystal Superalloy[J]. Journal of Materials Engineering, 2001, 0(10): 5-8

中图分类号： TG178 TQ153

参考文献

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