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Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 32, Number 10(3) (2020)
Copyright(C) MYU K.K.
pp. 3383-3397
S&M2346 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2020.2929
Published: October 30, 2020

Effects of Heat Generated during Grind Hardening on Hardness and Microstructure of Alloy Metal: Optimal Process to Improve Efficiency [PDF]

Shunxing Gao, Judong Liu, Songwei Huang, and Rongchuan Lin

(Received April 22, 2020; Accepted August 25, 2020)

Keywords: grind hardening, hardness, microstructure, regrinding value, softening zone, steel

Grind hardening is an alternative process to the conventional quenching process. The heat generated during grinding transforms the surface layer of workpieces into the martensitic structure. In this study, we simulated the temperature distribution during grind hardening to investigate the effects of heat on the changes in hardness and microstructure with different regrinding values using AISI 5140 alloy metal. We also compared the experimental results of single- and double-pass grind hardening processes. The results showed that the regrinding value affected the lateral distribution of hardness on the surface of the metal during grind hardening. The process created a softening width between the first and second ground layers, where a decreased softening width indicated the improved efficiency of grind hardening. It was found that double-pass grind hardening yielded the desired grinding results that reduced the softening width. The results of this study obtained using the AISI 5140 alloy metal also suggest that double-pass grind hardening can be used in high-efficiency quenching for various alloy metals.

Corresponding author: Judong Liu, Rongchuan Lin


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Cite this article
Shunxing Gao, Judong Liu, Songwei Huang, and Rongchuan Lin, Effects of Heat Generated during Grind Hardening on Hardness and Microstructure of Alloy Metal: Optimal Process to Improve Efficiency, Sens. Mater., Vol. 32, No. 10, 2020, p. 3383-3397.



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