Mod. 440A 마르텐사이트 스테인리스강의 기계적성질에 미치는 템퍼링처리의 영향

서지정보

· 발행기관 : 한국열처리공학회
· 수록지 정보 : 열처리공학회지 / 26권 / 3호 / 120 ~ 125페이지
· 저자명 : 권순두, 김영철, 강창룡

초록

In this study, the effect of tempering treatment on the mechanical properties in modified 440A steel has been investigated.The amount of remaining carbide decreased with increasing the austenitizing treatment temperature, and all carbides were completely dissolved at 1250oC. The amount of remaining carbide decreased with increasing the time of austenitizing, but the carbide remained insoluble up to 120 minutes at 1050oC. With increasing the tempering temperature, tensile strength decreased, and elongation increased slowly, while hardness rapidly decreased, and impact value unchanged and then rapidly increased over 500oC. The strength and hardness slowly decreased, while the elongation and impact absorbed energy increased with increasing the tempering time. Cr23C6 type carbide was precipitated and sharp decrease of elongation and toughness by tempering did not appear.

참고자료

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