The Structure and Properties of Precipitation Hardened Stainless Steels

Abstract

고장력강으로서 가공성 및 내식성 그리고 용접성이 좋은 철강재료가 바로 마르텐사이트系 석출경화형 합금강이다.

이를 미국에서는 PH系 합금강(列17-7PH)이라 부르며, 또한 영국에서는 변태조절강(Controlled Transformation steel)이라 부른다.

이들의 성분조성 및 全 생산열처리 공정과 이들의 성질 및 응용에 대하여 간단히 논하려 한다.

There is a requirement for readily formable corrosion resistemce alloys of higher strength. The alloy must also be weldable. such alloys are the martensitic precipitation hardening steels such as teh American PH series e.g. 17-7PH. British practice uses the term "Controlled Transformation Steel" e.g. FV 520(s) indicating the use of composition and heat treatment to control the austenite to martensite transformation.

The composition, microstructure, properties and applications of these steels together with full production sequence will be discussed.

There is a requirement for readily formable corrosion resistemce alloys of higher strength. The alloy must also be weldable. such alloys are the martensitic precipitation hardening steels such as teh American PH series e.g. 17-7PH. British practice uses the term "Controlled Transformation Steel" e.g. FV 520(s) indicating the use of composition and heat treatment to control the austenite to martensite transformation.

The composition, microstructure, properties and applications of these steels together with full production sequence will be discussed.