K417母合金900℃高温塑性的研究  

Investigation of Ductility of K417 Alloy at 900℃

作　　者：张华霞[1] 吴昌新[1] 杨坤[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《材料工程》2009年第S1期267-270,274,共5页Journal of Materials Engineering

摘　　要：K417镍基铸造高温合金是我国目前用量最大的合金之一,由于该合金900℃延伸率要求较高,在母合金生产中因塑性达不到要求而大量报废,对合金杂质元素以及试棒重熔工艺进行了研究,结果表明:微量杂质元素硒的含量对合金性能有明显不利影响;浇注温度和冷却速率对晶粒度和形态有显著影响,采用适中的浇注温度并缓慢冷却,控制合适的晶粒度有利于合金塑性改善。K417 nickel-base alloy is one of the largest amount consumption alloy in our country at present.There is a high rate of waste in the production of the master alloy because of the high requirement on elongation at 900℃.In the paper,the content of trace element selenium and thermal parameters have been studied.The results show that: element selenium have significantly adverse effects on ductility;pouring temperature and cooling rate have a significant impact on the grain size and shape.The ductility of the alloy can be improved by the suitable pouring temperature and cooling rate to control the grain size.

关 键 词：延伸率 塑性 冷却速率 晶粒度 

分 类 号：TG131[一般工业技术—材料科学与工程]