J033 Alloying effects on low-temperature tempering behaviors of Fe-N martensite

摘要

Martensite in Fe-N system have many similarities with that in Fe-C system. Our group reported that addition of substitutional alloy elements cause resistance to softening in Fe-0.3mass%N martensite and secondary hardening due to fine precipitation of alloy nitrides in 500 °C. Also, some resistance to temper softening at lower tempering temperature was seen. In this study, the alloying effects on microstructural evolution during low-temperature tempering process were investigated.