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Microstructure and Mechanical Properties of Calcium Treated 42CRMO4 Steel with Improved Machinability

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Abstract

The steel 42CrMo4 with improved machinability was studied. The steel containing high amount of sulfur was calcium treated during metallurgical production stage. The size and area distribution of non-metallic inclusions present in the studied steel was analyzed and compared to the conventional Cr–Mn–Mo steels with low sulfur and calcium content. The dilatometric investigation was performed to reveal the features of the austenite transformations in studied Cr–Mn–Mo steels with various content of alloying elements. The mechanical properties of the high and low sulfur steels were analyzed in heat treated condition (oil quenching and tempering). The results proved that calcium treated 42CrMo4 steel with high sulfur content possessed almost the same characteristics of hardenability and mechanical behavior as the conventional low-sulfur steels. This implies that the steel with improved machinability can be successfully applied for the production of the heavy duty and high strength parts using automated lines and machines.

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Acknowledgements

This work was carried out with the financial support of Decree No. 211 of the Government of the Russian Federation, contract No. 02.A03.21.0006, within the framework of the state assignment of the Ministry of Education and Science of the Russian Federation, Project No. 11.1465.2014/К.

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Authors and Affiliations

  1. Ural Federal University, Mira str., 19, Yekaterniburg, Russian Federation, 620000

    Mikhail V. Maisuradze

  2. OVAKO AB, SE-111 87, Stockholm, Sweden

    Thomas Björk

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  1. Mikhail V. Maisuradze
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  2. Thomas Björk
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Correspondence to Mikhail V. Maisuradze.

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Maisuradze, M.V., Björk, T. Microstructure and Mechanical Properties of Calcium Treated 42CRMO4 Steel with Improved Machinability. Trans Indian Inst Met 75, 681–690 (2022). https://doi.org/10.1007/s12666-021-02463-8

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  • DOI: https://doi.org/10.1007/s12666-021-02463-8

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