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  4. 镍基单晶高温合金凝固缺陷研究进展

材料工程, 2012, (1): 93-98. doi: 10.3969/j.issn.1001-4381.2012.01.019

镍基单晶高温合金凝固缺陷研究进展

赵新宝 1, , 刘林 2, , 杨初斌 3, , 张军 4, , 李玉龙 5, , 傅恒志 6,

1.西北工业大学航空学院,西安710072;西北工业大学凝固技术国家重点实验室,西安710072

2.西北工业大学凝固技术国家重点实验室,西安710072

3.西北工业大学凝固技术国家重点实验室,西安710072

4.西北工业大学凝固技术国家重点实验室,西安710072

5.西北工业大学航空学院,西安710072

6.西北工业大学凝固技术国家重点实验室,西安710072

基金项目:   中国博士后科学基金(20100481361;201104680)   凝固技术国家重点实验室(西北工业大学)博士后基金(09BZ-2010)   国家自然科学基金(50931004;51101120)   国家973项目(2010CB631202;2011CB610406)  

关键词： 镍基单晶高温合金 , 定向凝固 , 凝固缺陷 , 工艺参数

Advance in Research of Casting Defects of Directionally Solidified Nickel-based Single Superalloys

镍基单晶高温合金的凝固缺陷对其力学性能有很大的影响,减少和控制凝固缺陷对提高合金性能和降低成本具有重要意义.综述了镍基单晶高温合金定向凝固过程中可能出现的几个重要缺陷,包括缩松、雀斑、晶体取向的偏离和杂晶,重点讨论了这些缺陷的特点和产生的机理,并从合金成分、工艺参数、铸件结构等方面分析了凝固缺陷的影响因素,指出了减少单晶高温合金凝固缺陷的措施.

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