铸造2012，Vol.61Issue(4)：418-421,4.
回炉料对K441合金性能及杂质元素含量的影响
Effect of Returns on Properties and Impurity Elements Content of K441 Superalloy
蔡新宇 1于兴福 2王铁军 1曲殿鹏 2王宇飞 1满延林 1宁英1
作者信息
- 1. 中航集团沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043
- 2. 沈阳工业大学材料科学与工程学院,辽宁沈阳110870
- 折叠
摘要
Abstract
By adopting the vacuum induction melting, K441 superalloy' returns was melted four times and the creep life, mechanical properties and content of impurity elements of superalloy were determined. The effects of returns on creep life, mechanical properties, impurity element content and microstructure of K441 superalloy were studied. The results show that, after four times smelting the creep life of alloy meets requirement, the creep life of alloy using returns compared with fresh alloy changes little, and the tensile strength and plasticity changes little, but the fourth returns alloy tensile strength is higher, this is mainly due to the Si element solution strengthening. With the recycle times increasing of returns alloy, the S content decreased in the alloy and the Mn content changed little, but the content of P and Si increased. The observations of microstructure show that the carbide distributed along the grain boundaries in fresh alloy and returns alloy, and some carbide exist in the fresh alloy. There is a phenomenon that impurities increase at grain boundaries in returns alloy. The content of γ' phase in fresh alloy and returns alloy is fewer, but the alloys possess the same content of γ' phase, but the γ' phase size in returns decreased after many times recycling.关键词
K441合金/持久寿命/回炉次数/杂质元素Key words
K441 superalloy/ creep life/ recycle times/ impurity element分类
矿业与冶金引用本文复制引用
蔡新宇,于兴福,王铁军,曲殿鹏,王宇飞,满延林,宁英..回炉料对K441合金性能及杂质元素含量的影响[J].铸造,2012,61(4):418-421,4.
