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Wear Properties of a Sulfnitrided Layer Formed on AISI 4140 Steel by Using Plasma Treatments

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Abstract

In this study, sulfnitriding treatments were performed to improve the properties of wear resistance of AISI4140 as steel for machine structural use. Prior to these plasma treatments, a thick compound layer, a thickness of 7 to 10 μm, was formed on the surfaces of the specimens, after which the sulfnitriding treatments were performed in the same chamber. Plasma nitriding was carried out at 813 K for 2 h in an atmosphere of 75 vol% N2 and 25 vol% H2 in addition to C2H2 flowing at 50 sccm. To form a sulphide layer of about 2 to 5 μm in thickness, we carried out plasma sulfnitriding at temperature of 723 K-813 K for 2 h in the plasma nitriding in addition to H2S flowing at 100 sccm. The friction coefficient of AISI 4140 steels was reduced to 0.4 by changing the process temperature during plasma sulfnitriding. The wear volume loss also were decreased with increasing sulfnitriding process temperatures.

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Acknowledgments

This work was supported by the Technology Innovation Program (No. 10067499, Development of a low pressure carburizing furnace and process with 30% higher energy efficient and a capacity of 1 ton) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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Authors and Affiliations

  1. Korea Institute of Industrial Technology, Production Technology R&D Division Heat Treatment Group, Cheonan, 15014, Korea

    Hyunjun Park, Hanchan Lee & Kyoungil Moon

  2. Department of Electronic Engineering, Namseoul University, Cheonan, 31020, Korea

    Boongjoo Lee

Authors
  1. Hyunjun Park
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  2. Hanchan Lee
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  3. Kyoungil Moon
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  4. Boongjoo Lee
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Correspondence to Kyoungil Moon.

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Park, H., Lee, H., Moon, K. et al. Wear Properties of a Sulfnitrided Layer Formed on AISI 4140 Steel by Using Plasma Treatments. J. Korean Phys. Soc. 74, 880–884 (2019). https://doi.org/10.3938/jkps.74.880

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  • DOI: https://doi.org/10.3938/jkps.74.880

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