Notice of retraction
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.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Effect of Generated Heat from Grind Hardening on Hardness and Microstructure of Alloy Metal: Optimal Process to Improve Efficiency

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 in 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. The results showed that the regrinding value affected the lateral distribution of hardness on the surface of the metal during the process. The process created a softening width between the first and second ground layers, where a decreased softening width indicated the improved efficiency of the grind hardening. It was found that double-pass grind hardening yielded the desired grinding results that minimized 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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