Microstructure and properties of low carbon corrosion-resistant die steel 0Cr13NiN under different heat treatment states were studied,and the mechanical properties and pitting resistance were compared with pre-hardened corrosion-resistant die steel 4Cr13.The results show that the annealed microstructure of the 0Cr13NiN steel is mainly composed of ferrite and carbides.Compared to pre-hardened 4Cr13 steel,pre-hardened 0Cr13NiN steel has better pitting resistance and toughness.The recommended pre-hardening heat treatment process for the 0Cr13NiN steel is quenching temperature of 980-1030 ℃,tempering temperature of 520-540 ℃,and tempering twice.The quenched microstructure is martensite+undissolved carbonitride+a small amount of retained austenite,and the tempered microstructure is tempered martensite+primary carbonitride+carbonitride.
corrosion-resistant die steel 0Cr13NiNquenchingtemperingmicrostructuremechanical propertiescorrosion resistance
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