镍基单晶合金热处理过程中的组织演变
Microstructure Evolution of Ni-based Single Crystal Superalloy During Heat-treating
查看参考文献11篇
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文摘
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利用螺旋选晶法制备了镍基单晶合金,研究了热处理过程中合金的组织演变。结果表明:合金的铸态组织由枝晶组成,W偏析于枝晶干,Ti、Cr、Mo和Ta偏析于枝晶间,固溶处理可以消除铸态组织中的枝晶,减小成分偏析,固溶温度越高,粗大的γ’和γ/γ’共晶溶解的越完全。时效处理过程中,大尺寸的γ’发生粗化,小尺寸的γ’逐渐消失,时效温度越高,γ’粗化得越严重。热处理促进合金元素在γ和γ’中的均匀分布,减小了合金的错配度。 |
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其他语种文摘
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A Ni-based superalloy was prepared by screw selecting crystal method.Microstructure evolution of the alloy during heat-treatment was investigated.The results show that the as-casting microstructure is composed by dendrites.EDS analysis indicates that W partitioned in dendrite zone and Ti,Cr,Mo,Ta in inter-dendrite.Solid solution treatment decreases composition partitioning,and with the increase of the solution temperature,coarsening γ’ and γ/γ’ eutectic solves completely.During the aging treating,the larger γ’ coarsenes and the smaller γ’ disappeares gradually.Mismatch of the alloy decreases after heat-treating which due to the elements diffusing caused by heat-treatment. |
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来源
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热加工工艺
,2012,41(2):214-218 【核心库】
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关键词
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镍基单晶合金
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枝晶
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固溶
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时效
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错配度
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地址
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1.
辽宁工程技术大学材料科学与工程学院, 辽宁, 阜新, 123000
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中平能化集团天工机械制造有限公司, 河南, 平顶山, 467000
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-3814 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:4438456
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