1.0%∼2.78% Si와 0∼0.2% mischmetal을 함유한 80Ni-20Cr 전기저항 발열합금의 고온산화특성인 수명치를 비롯하여 현미경조직, 전기저항, 기계적강도를 고찰하였다. 첨가원소들이 수명에 미치는 영향을 보면 mischmetal이 존재 할 때에 Si량에 따라 수명이 길어진다. mischmetal에 의한 결정성장 저지 역시 이에 기여한다.

80Ni-20Cr electrical resistance heating alloys containing 1.0%∼2.78% Si and 0∼0.2% mischmetal were prepared, and their life cycle, microstructure, electrical resistance and mechanical strength were investigated. Investigating the effects of the added elements on the life of alloys, it was found that the significant improvements were observed as Si contents increase when there exists mischmetal. Effects of mischmetal addition through grain growth inhibition are also discussed.