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Kinetics Analysis Of Higher Temperature Salt Bath Nitriding For Aisi 1045 Steel

Author

Listed:
  • MINGYANG DAI

    (School of Materials Science and Engineering, Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China)

  • YAO CHEN

    (School of Materials Science and Engineering, Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China)

  • YATING CHAI

    (#x2020;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China‡Materials Research and Education Center, Auburn University, AL36849, USA)

  • JING HU

    (School of Materials Science and Engineering, Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China†Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China‡Materials Research and Education Center, Auburn University, AL36849, USA)

Abstract

Rapid salt bath nitriding was conducted at higher temperature above 600∘C instead of normally used 560∘C for AISI 1045 steel. Optical microscopy (OM), X-ray diffraction (XRD) and micro-hardness tester were employed to characterize the microstructure, phase constituents and micro-hardness of the treated specimens. The results showed that salt bath nitriding at higher temperature could significantly increase the compound layer thickness and higher cross-sectional hardness can be obtained. Kinetics analysis illustrated that the nitrogen atoms diffusion coefficient was obviously increased with temperature, and the activation energy of nitrogen atom diffusion was decreased from 220kJ⋅mol−1 to 142kJ⋅mol−1.

Suggested Citation

  • Mingyang Dai & Yao Chen & Yating Chai & Jing Hu, 2016. "Kinetics Analysis Of Higher Temperature Salt Bath Nitriding For Aisi 1045 Steel," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 23(06), pages 1-5, December.
    • Handle: RePEc:wsi:srlxxx:v:23:y:2016:i:06:n:s0218625x16500499
    DOI: 10.1142/S0218625X16500499
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