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Effect of Quenching and Partitioning Process on Microstructure and Properties of Mn-Si-Cr Steel

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Abstract

The effects of different partitioning temperatures and time on the microstructure and properties of Mn-Si-Cr alloy steel were investigated. The results showed that with the increase in the partitioning temperature or the extension of the partitioning time, the martensite arrangement in the Mn-Si-Cr alloy steel became irregular, and the boundary was gradually blurred; the austenite mainly existed in the form of thin film, and the austenite content increased at first and then decreased gradually. When the partitioning temperature was too high or the partitioning time was too long, all led to the decomposition of austenite into low-carbon bainite and carbides. With the increase in the temperature, the hardness of the samples decreased gradually, the wear weight loss increased gradually, and the impact toughness increased linearly. With the extension of the partitioning time, the hardness of the sample gradually decreased. When the partitioning time is 5-10min, the hardness decreases greatly. When the partitioning temperature was 350 °C and the partitioning time was 60s, the test steel can have hardness, impact toughness, and wear resistance and has good comprehensive mechanical properties.

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Acknowledgment

The authors would like to thank the financial support for this work from Hebei Science and Technology Major Project (21281003Z) and National Natural Science Foundation of China (52075010).

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Correspondence to Hanguang Fu.

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Si, Z., Yuan, N. & Fu, H. Effect of Quenching and Partitioning Process on Microstructure and Properties of Mn-Si-Cr Steel. J. of Materi Eng and Perform 31, 8655–8667 (2022). https://doi.org/10.1007/s11665-022-06871-9

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  • DOI: https://doi.org/10.1007/s11665-022-06871-9

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