Cargando…

Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment

Refined microstructures achieved by cyclic heat treatment significantly contribute to improving the wear resistance of steels. To acquire the refined microstructures of 65Mn low-alloy steel, first, the specimens were solid solution-treated; then, they were subjected to cyclic heat treatment at cycli...

Descripción completa

Detalles Bibliográficos
Autores principales: Tong, Ying, Zhang, Yu-Qing, Zhao, Jiang, Quan, Guo-Zheng, Xiong, Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703974/
https://www.ncbi.nlm.nih.gov/pubmed/34947232
http://dx.doi.org/10.3390/ma14247636
_version_ 1784621595242790912
author Tong, Ying
Zhang, Yu-Qing
Zhao, Jiang
Quan, Guo-Zheng
Xiong, Wei
author_facet Tong, Ying
Zhang, Yu-Qing
Zhao, Jiang
Quan, Guo-Zheng
Xiong, Wei
author_sort Tong, Ying
collection PubMed
description Refined microstructures achieved by cyclic heat treatment significantly contribute to improving the wear resistance of steels. To acquire the refined microstructures of 65Mn low-alloy steel, first, the specimens were solid solution-treated; then, they were subjected to cyclic heat treatment at cyclic quenching temperatures of 790–870 °C and quenching times of 1–4 with a fixed holding time of 5 min. The mechanical properties of 65Mn low-alloy steel in terms of hardness, tensile strength, elongation and wear resistance were characterized. Afterwards, the effect of cyclic heat treatment on microstructure evolution and the relationships between grain refinement and mechanical properties’ improvement were discussed. The results show that the average grain size firstly decreased and then increased with the increase in the quenching temperature. Hardness increased with grain refinement when the temperature was lower than 830 °C. Once the temperature exceeded 830 °C, hardness increased with the temperature increase owing to the enrichment of carbon content in the martensite. With the increase in cyclic quenching times, hardness continuously increased with grain refinement strengthening. In addition, both tensile strength and elongation could be significantly improved through grain refinement. The relationships among wear loss, hardness and average grain size showed that wear resistance was affected by the synthesis reaction of grain refinement and hardness. Higher hardness and refined grain size contributed to improving the wear resistance of 65Mn low-alloy steel.
format Online
Article
Text
id pubmed-8703974
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-87039742021-12-25 Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment Tong, Ying Zhang, Yu-Qing Zhao, Jiang Quan, Guo-Zheng Xiong, Wei Materials (Basel) Article Refined microstructures achieved by cyclic heat treatment significantly contribute to improving the wear resistance of steels. To acquire the refined microstructures of 65Mn low-alloy steel, first, the specimens were solid solution-treated; then, they were subjected to cyclic heat treatment at cyclic quenching temperatures of 790–870 °C and quenching times of 1–4 with a fixed holding time of 5 min. The mechanical properties of 65Mn low-alloy steel in terms of hardness, tensile strength, elongation and wear resistance were characterized. Afterwards, the effect of cyclic heat treatment on microstructure evolution and the relationships between grain refinement and mechanical properties’ improvement were discussed. The results show that the average grain size firstly decreased and then increased with the increase in the quenching temperature. Hardness increased with grain refinement when the temperature was lower than 830 °C. Once the temperature exceeded 830 °C, hardness increased with the temperature increase owing to the enrichment of carbon content in the martensite. With the increase in cyclic quenching times, hardness continuously increased with grain refinement strengthening. In addition, both tensile strength and elongation could be significantly improved through grain refinement. The relationships among wear loss, hardness and average grain size showed that wear resistance was affected by the synthesis reaction of grain refinement and hardness. Higher hardness and refined grain size contributed to improving the wear resistance of 65Mn low-alloy steel. MDPI 2021-12-11 /pmc/articles/PMC8703974/ /pubmed/34947232 http://dx.doi.org/10.3390/ma14247636 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tong, Ying
Zhang, Yu-Qing
Zhao, Jiang
Quan, Guo-Zheng
Xiong, Wei
Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title_full Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title_fullStr Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title_full_unstemmed Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title_short Wear-Resistance Improvement of 65Mn Low-Alloy Steel through Adjusting Grain Refinement by Cyclic Heat Treatment
title_sort wear-resistance improvement of 65mn low-alloy steel through adjusting grain refinement by cyclic heat treatment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703974/
https://www.ncbi.nlm.nih.gov/pubmed/34947232
http://dx.doi.org/10.3390/ma14247636
work_keys_str_mv AT tongying wearresistanceimprovementof65mnlowalloysteelthroughadjustinggrainrefinementbycyclicheattreatment
AT zhangyuqing wearresistanceimprovementof65mnlowalloysteelthroughadjustinggrainrefinementbycyclicheattreatment
AT zhaojiang wearresistanceimprovementof65mnlowalloysteelthroughadjustinggrainrefinementbycyclicheattreatment
AT quanguozheng wearresistanceimprovementof65mnlowalloysteelthroughadjustinggrainrefinementbycyclicheattreatment
AT xiongwei wearresistanceimprovementof65mnlowalloysteelthroughadjustinggrainrefinementbycyclicheattreatment