Effect of Heat Treatment Conditions on Retained Austenite and Corrosion Resistance of the X190CrVMo20-4-1 Stainless Steel

M. C. Bignozzi; L. Calcinelli; M. Carati; L. Ceschini; C. Chiavari; G. Masi; A. Morri

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자료유형: 학술저널

저자정보: M. C. Bignozzi (University of Bologna) L. Calcinelli (University of Bologna) M. Carati (SACMI IMOLA S.C.) L. Ceschini (University of Bologna) C. Chiavari (University of Bologna) G. Masi (University of Bologna) A. Morri (University of Bologna)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.9

발행연도: 2020.1

수록면: 1,318 - 1,328 (11page)

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In the present work the microstructural characterization of the powder-metallurgy X190CrVMo20-4-1 has been performedand correlated with its corrosion properties. The martensitic stainless steel was hardened at different austenitizing andtempering temperatures. Microstructural analyses were carried out using Scanning Electron Microscopy (SEM–EDS) todefine the carbide distribution in the steel matrix. Carbides morphology and retained austenite content were evaluated andcorrelated to the corrosion behaviour of the different heat-treated steels, investigated by means of electrochemical tests. Theresults show the presence of M23C6and M7C3Cr-V based carbides homogenously dispersed in the matrix in annealed andquenching-and-tempering conditions. The carbides dissolution was evaluated by image analysis in every different heat treatmentcondition. When low tempering temperature was applied, an increasing in retained austenite content was defined byhigh austenitizing temperature and elevated carbides solubilization. At high tempering temperature, retained austenite contentwas not up to 5% nor affected by austenitizing temperature. Contrary to the expectations, HRC hardness was not influencedby the heat treatment conditions and retained austenite content. Corrosion resistance of the different heat-treated sampleswas found to be mainly influenced by retained austenite volume fraction and the tempering temperature. In particular, highaustenitizing temperature and low tempering temperatures allowed the best corrosion resistance among the different heattreatment parameters investigated. The results obtained in the experimentation can provide support to the heat treatmentoptimization of the steel, widely used in tool and mould applications.

#Tool steel · Quenching and tempering · Carbides · Retained austenite · Corrosion · Current density-potential curve

참고문헌 (38)

참고문헌 신청

K.E. Thelning / 1984 / Steel and Its Heat Treatment / Butterworths

G. E. Totten / 2006 / Steel Heat Treatment Handbook / CRC Press

Tadeusz Nykiel / 2014 / Transformations of Carbides During Tempering of D3 Tool Steel / Journal of Materials Engineering and Performance 23(6):2050~2054

Yiwa Luo / 2017 / Effects of Austenitizing Conditions on the Microstructure of AISI M42 High-Speed Steel / Metals 7(1):27

Rumana Hossain / 2017 / Effect of small addition of Cr on stability of retained austenite in high carbon steel / Materials Characterization 125:114~122

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