固溶温度对GH2787合金组织性能的影响

doi:10.11901/1005.3093.2016.377

材料研究学报

2017, Vol. 31

Issue (7): 517-525 DOI: 10.11901/1005.3093.2016.377

研究论文

本期目录 | 过刊浏览

固溶温度对GH2787合金组织性能的影响

徐玲^1,²(

), 国振兴³, 张冬梅³, 孙长青¹, 朱爽¹, 王炳达¹, 李玉秀¹, 崔传勇²

1 沈阳工程学院沈阳 110136
2 中国科学院金属研究所沈阳 110016
3 沈阳黎明航空发动机(集团)有限责任公司沈阳 110043

Effect of Solution Temperature on Microstructure and Mechanical Property of High Temperature Alloy GH2787

Ling XU^1,²(

), Zhenxing GUO³, Dongmei ZHANG³, Changqing SUN¹, Shuang ZHU¹, Bingda WANG¹, Yuxiu LI¹, Chuanyong CUI²

1 Shenyang Institute of Engineering, Shenyang 110136, China
2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3 Shenyang Liming Aero-Engine Group Corporation, Shenyang 110043, China

引用本文:

徐玲, 国振兴, 张冬梅, 孙长青, 朱爽, 王炳达, 李玉秀, 崔传勇. 固溶温度对GH2787合金组织性能的影响[J]. 材料研究学报, 2017, 31(7): 517-525.
Ling XU, Zhenxing GUO, Dongmei ZHANG, Changqing SUN, Shuang ZHU, Bingda WANG, Yuxiu LI, Chuanyong CUI. Effect of Solution Temperature on Microstructure and Mechanical Property of High Temperature Alloy GH2787[J]. Chinese Journal of Materials Research, 2017, 31(7): 517-525.

全文: PDF(9943 KB) HTML

摘要:

研究了不同固溶温度对GH2787合金组织和性能的影响。结果表明,当固溶温度高于γ'相溶解温度时,合金晶粒尺寸较大,γ'相体积分数较低;当固溶温度接近γ'相溶解温度时,合金中γ'相分布不均匀,并且出现γ'相团簇,同时在合金中析出大量η相;当固溶温度低于γ'相溶解温度时,合金晶粒尺寸较小,γ'相体积分数较高且均匀分布在合金中。显微硬度和拉伸试验表明,随固溶温度较低,合金的硬度和强度提高,研究表明GH2787合金的主要强化机理是晶界强化和沉淀强化。

关键词 ：金属材料, GH2787, 热处理, 显微组织, 拉伸性能

Abstract：

Effect of solution treatment temperatures on the microstructure and mechanical property of a high temperature alloy GH2787 was investigated. The results showed that the grain size of the alloy could be controlled by the solution temperature. When the solution temperature was higher than the solve temperature of γ' phase, the grain size was larger and the volume fraction of γ'- phase was low. When the solution temperature was lower than the solve temperature of γ'-phase, the grain size was smaller and the volume fraction of γ'-phase was high, and which was uniformly distributed in the alloy. η-phase precipitated when the solution temperature was around the solve temperature of γ'-phase. The Vickers hardness and the tension strength increased as the solution temperature decreased. The strengthening mechanisms of the alloy GH2787 might be ascribed to grain boundary strengthening and precipitation strengthening.

Key words： metallic materials GH2787 heat-treatment microstructure tension properties

收稿日期: 2016-07-04

ZTFLH:

TG171

基金资助:资助项目国家重点基础研究发展计划(2010CB631206),国家自然科学基金(51171179, 51128101, 51271174)和中国科学院“百人计划”

作者简介:

作者简介徐玲,女,1983年生,博士,讲师

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	徐玲
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	王炳达
	李玉秀
	崔传勇
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https://www.cjmr.org/CN/10.11901/1005.3093.2016.377 或 https://www.cjmr.org/CN/Y2017/V31/I7/517

图1 采用Thermal-Calc计算的GH2787的相图

表1 GH2787合金的化学成分

图2 压扁变形50%后样品的显微组织

图3 压扁变形后的显微组织

图4 γ’相溶解温度以上固溶处理后样品的金相组织

图5 980℃固溶处理后样品的组织形貌

图6 接近γ’相溶解温度固溶处理后样品的组织 (a) 940℃, (b) 920℃

图7 940℃固溶处理后样品的组织形貌

图8 γ’相溶解温度以下固溶处理后合金的组织

图9 900℃固溶处理后合金的显微组织

图10 针状析出相TEM形貌

图11 析出相衍射斑点

表2 析出相的化学成分

图12 样品的显微硬度随固溶温度变化的曲线

图13 不同温度热处理后合金在25℃及550℃下的拉伸性能曲线

表3 热处理后合金在不同温度下的拉伸性能数据

图14 900℃固溶处理后室温拉伸变形的TEM显微组织

图15 940℃固溶处理后室温拉伸变形的TEM像

图16 980℃固溶处理后室温拉伸变形组织的TEM像

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