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Dimensional Precision in Sinter-hardening PM Steels

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  • URLhttps://db.koreascholar.com/Article/Detail/4109
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한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Dimensional precision is a critical parameter in net shape processing of ferrous PM components. Sinter-hardening alloys undergo a transformation from austenite to martensite. Martensite formation expands the sintered compact, while tempering hardened steels results in shrinkage. In addition, martensitic regions with high Cu and C contents may contain large amounts of retained austenite. The presence of martensite and retained austenite, in addition to the tempering step, all play a role in the final dimensions of a component. This paper investigates the dimensional and microstructural changes to two sinter-hardening grades through different post-sintering thermal treatments.

저자
  • Lindsley
  • Bruce
  • Murphy
  • Thomas