不同稀土元素添加量对K465合金微观组织与力学性能的影响

利用金相技术和扫描电镜（SEM）观察分析了稀土元素（Ce＋Y）含量对K465合金微观组织的影响,并测试了合金的室温瞬时拉伸性能和高温持久性能.结果表明：（Ce＋Y）含量为0.03％（质量分数,下同）的合金碳化物变质处理后形态良好,高温持久性能大幅提高;（Ce＋Y）含量为0.06％的合金枝晶间区大块γ＆#39;目的边缘析出富（Ce＋Y）相,从而使合金的持久性能明显下降....

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Bibliographic Details
Published in材料工程 no. 8; pp. 46 - 50
Main Author 王定刚 肖程波 宋尽霞 李青 余乾
Format Journal Article
LanguageChinese
Published 北京航空材料研究院先进高温结构材料重点实验室,北京,100095 2014
Subjects
K465合金
力学性能
微观组织
稀土元素
rare-earth element
力学性能
microstructure
微观组织
稀土元素
mechanical property
K465合金
K465 superalloy
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ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2014.08.009

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Summary:利用金相技术和扫描电镜（SEM）观察分析了稀土元素（Ce＋Y）含量对K465合金微观组织的影响,并测试了合金的室温瞬时拉伸性能和高温持久性能.结果表明：（Ce＋Y）含量为0.03％（质量分数,下同）的合金碳化物变质处理后形态良好,高温持久性能大幅提高;（Ce＋Y）含量为0.06％的合金枝晶间区大块γ＆#39;目的边缘析出富（Ce＋Y）相,从而使合金的持久性能明显下降.
Bibliography:WANG Ding-gang, XIAO Cheng-bo, SONG Jin-xia, LI Qing, YU Qian （Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials, Beiiing 100095, China）
11-1800/TB
K465 superalloy ; rare-earth element ; microstructure ; mechanical property
The effect of （Ce＋Y） content on microstructure of K465 superalloy was examined by met- allography technique and scanning electron microscope（SEM）. The tensile properties at room temper- ature and the high temperature stress-rupture properties were tested. The results show that the mor- phology of carbides can be well modified by addition 0.03G（mass fraction） of （Ce＋Y） which induces the improvement of high temperature stress-rupture properties. The high temperature stress-rupture properties decrease due to the precipitation of rich （Ce＋Y） phases besides the large size γ＇ phases in the interdendritic area while adding 0.06G of （Ce＋Y）.
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2014.08.009