本发明涉及一种粉末冶金耐腐蚀沉淀硬化高速钢，其化学成分按质量百分比计包含：C：0%-0.1%；Si：0%-1.0%；Mn：0%-0.5%；Cr：2.0%-15.0%；Co：8.0%-16.0%；W：0%-5.0%；Mo：18.0%-25.0%；（Mo+ W/2）：12.0%-28.0%；余量为铁和杂质，且该钢主要由铁基立方固溶体基体与基体中金属间化合物（简称IMC）μ相组成，其中μ相为(Fe, Co)7(Mo+ W/2)6型。本发明制得的粉末冶金耐腐蚀沉淀硬化高速钢μ相尺寸细小且分布均匀，具备出色的综合性能，尤其是耐腐蚀性能和抗回火软化能力突出，满足不同工况的需求。

The invention relates to a powder metallurgy corrosion-resistant precipitation-hardening high speed steel, whose chemical composition includes: C: 0% - 0.1% by mass; Si：0%-1.0%； Mn：0%-0.5%； Cr：2.0%-15.0%； Co：8.0%-16.0%； W：0%-5.0%； Mo：18.0%-25.0%； （Mo+ W/2）：12.0%-28.0%； The surplus is iron and impurities, and the steel is mainly composed of iron base cubic solid solution matrix and intermetallic compounds in the matrix (IMC for short) μ Phase composition, wherein μ The phase is (Fe, Co) 7 (Mo+ W/2) 6 type. The powder metallurgy corrosion-resistant precipitation hardening high-speed steel prepared by the invention μ The phase size is small and evenly distributed, with excellent comprehensive performance, especially outstanding corrosion resistance and tempering softening resistance, to meet the requirements of different working conditions.