열처리 후에도 날 끝부분에 6.8%의 잔유 오스테나이트가 그대로 존재하고 있으며 따라서 템퍼링 작업이 필요함을 확인하였다.
It was confirmed that 6.8% residual austenite was still present at the blade's edge even after heat treatment, so tempering was necessary.