| 定向凝固方法对DZ22合金初熔温度的影响 |
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| 引用本文： | 刘忠元,宋波.定向凝固方法对DZ22合金初熔温度的影响[J].宇航学报,1997,18(1):76-79. |
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| 作者姓名： | 刘忠元 宋波 |
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| 作者单位： | 西北工业大学，上海航空发动机制造厂 |
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| 基金项目： | 国家自然科学基金资助国家自然科学基金资助课题 |
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| 摘 要： | 低熔点相Ｎｉ５Ｈｆ是影响定向凝固合金初熔温度的主要因素。本文研究了定向凝固方法对ＤＺ２２合金初熔温度的影响。试验结果发现，ＺＭＬＭＣ法与ＨＲＳ法相比，提高了合金的初熔温度，这是由于ＺＭＬＭＣ法使定向柱晶组织高度细化，元素偏析程度大大减弱，抑制了Ｎｉ５Ｈｆ相的形成
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| 关 键 词： | 初熔温度 ZMLMC法和HRS法 Ni5Hf相 |
THE EFFECT OF DIRECTIONAL SOLIDIFICATION PROCESSES ON INCIPIENT MELTING TEMPERATURE OF DS SUPERALLOY DZ22 |
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| Liu Zhongyuan,Li Jianguo,Shi Zhengxing,Fu Hengzhi.THE EFFECT OF DIRECTIONAL SOLIDIFICATION PROCESSES ON INCIPIENT MELTING TEMPERATURE OF DS SUPERALLOY DZ22[J].Journal of Astronautics,1997,18(1):76-79. |
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| Authors: | Liu Zhongyuan Li Jianguo Shi Zhengxing Fu Hengzhi |
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| Abstract: | One of the chief factors influencing the incipient melting temperature of DS superalloy DZ22 was found out to be Ni 5Hf phase This paper deals with the effect of directional solidification processes on the incipient melting temperaute of DS superalloy DZ22 Experimental results show that ZMLMC increases the incipient melting temperature of superalloy DZ22 compared with HRS This is because the directional solidification structure refines highly,the dendrite segregation decreases,the formation of Ni 5Hf phase suppreses |
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| Keywords: | incipient melting temperature ZMLMC and HRS process Ni 5Hf phase |
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