Al、Ti、Ta对镍基单晶高温合金组织和性能的影响

孙跃军; 康俊国; 宫声凯

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Al、Ti、Ta对镍基单晶高温合金组织和性能的影响
Effects of Al,Ti and Ta on Microstructure and Properties of Ni-based Single Crystal Superally
2008年第9期页码：660-662
纸质出版日期： 2008 ，
DOI：

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[1]孙跃军,康俊国,宫声凯.Al、Ti、Ta对镍基单晶高温合金组织和性能的影响[J].特种铸造及有色合金,2008(09):660-662+651.

Sun Yuejun, Kang Junguo, Gong Shengkai. Effects of Al,Ti and Ta on Microstructure and Properties of Ni-based Single Crystal Superally[J]. Special Casting & Nonferrous Alloys, 2008,(9):660-662.
[1]孙跃军,康俊国,宫声凯.Al、Ti、Ta对镍基单晶高温合金组织和性能的影响[J].特种铸造及有色合金,2008(09):660-662+651. DOI：

Sun Yuejun, Kang Junguo, Gong Shengkai. Effects of Al,Ti and Ta on Microstructure and Properties of Ni-based Single Crystal Superally[J]. Special Casting & Nonferrous Alloys, 2008,(9):660-662. DOI：

摘要

利用ISP 05 DS/SC定向单晶炉拉制单晶试棒

研究了Al、Ti、Ta含量对镍基高温合金组织和性能的影响。研究结果表明

铸态组织中Al、Ti、Ta主要分布于γ′相中。Al、Ti、Ta含量的提高可以提高Co、Cr、Mo在γ基体中的溶解度

同时

随着Al、Ti、Ta含量的提高

合金的固溶温度提高

错配度增大

γ′增强相的形貌也由椭球形转为方形。高温持久试验结果表明

Al、Ti、Ta含量的增加可以提高合金的持久寿命。

Abstract

Effects of Al

Ti and Ta on microstructure and properties of Ni-based single crystal superalloy prepared by ISP-05-DS/SC furnace were investigated by testing both solvus temperature and mismatch degree . The results reveal that Al

Ti and Ta elements are mainly distributed in γ′ phase in as-cast microstructure. The solubility of Co

Cr and Mo in γ phase and solvus temperature as well as the enlargement of mismatch can be increased with increasing in Al

Ti and Ta content

which results in the morphology of γ′ phase changed from spherical to cubic structure. In addition

the enduring life of the superalloy at high temperature can be improved with the increase of Al

Ti and Ta content.

关键词

高温合金单晶固溶温度错配度持久寿命

Keywords

SuperalloySingle CrystalSolvus TemperatureMismatchEnduring Life

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