摘要
为分析铝加热炉用电热合金扁带材使用寿命较短的原因,主要研究几种常用电热合金的显微组织.采用金相显微镜和金相分析软件,表征并分析Cr20Ni80、0Cr25Al5、0Cr21Al6Nb、0Cr27Al7Mo2、HRE、Kanthal AF-1电热合金扁带材的晶粒大小及夹杂物含量,结果发现:加入铌元素的0Cr21Al6Nb材质具有最小的晶粒,达到12.5级;而利用粉末冶金炼制的Kanthal AF-1材质具有最小的夹杂物体积分数为0.146%.从晶粒大小和夹杂物含量对电热合金性能的影响分析认为,加入铌元素采用粉末冶金法炼制的电热合金为最理想的电热合金材料.
In order to find the reasons of short life of electrothermal alloy ribbon used for aluminum heating furnace, the microstructure of ribbon was investigated. Using optical microscopy and metallographic analysis software, the grain size and inclusion content of six kinds of electrothermal alloy, such as Cr20Ni80, 0Cr25Al5, 0Cr21A16Nb, 0Cr27A17Mo2, HRE and Kanthal AF-1 were characterized and analyzed. It was found that the 0Cr21AI6Nb alloy contained niobium elements would have the smallest grain size, grading as 12. 5, and that the Kanthal AF-1 alloy would be refined by powder metallurgy and would have the smallest inclusion, as 0. 146%. Because the grain size and inclusion content have a definitive effect on the performance of electrothermal alloy, it could be concluded that the electrothermal alloy with niobium addition and powder metallurgy would be the best ideal electrothermal alloy.
出处
《兰州理工大学学报》
CAS
北大核心
2014年第2期14-17,共4页
Journal of Lanzhou University of Technology
基金
甘肃省战略新兴产业专项项目(2012-672)
关键词
晶粒度
夹杂物
电热合金
grain size
inclusion
electrothermal alloy
