Cargando…

Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel

The automobile covering parts mold is a key piece of equipment in the automobile industry, and its drawbead is the core element that affects the life of the mold and the quality of the parts made. Due to the complex structure of the mold cavity for covering parts, there exist differences between mat...

Descripción completa

Detalles Bibliográficos
Autores principales: Feng, Aixin, Zhao, Jian, Lin, Jinhao, Pan, Xiaoming, Feng, Huibin, Wang, Changyu, Lu, Zhengyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9570892/
https://www.ncbi.nlm.nih.gov/pubmed/36234035
http://dx.doi.org/10.3390/ma15196693
_version_ 1784810224256811008
author Feng, Aixin
Zhao, Jian
Lin, Jinhao
Pan, Xiaoming
Feng, Huibin
Wang, Changyu
Lu, Zhengyuan
author_facet Feng, Aixin
Zhao, Jian
Lin, Jinhao
Pan, Xiaoming
Feng, Huibin
Wang, Changyu
Lu, Zhengyuan
author_sort Feng, Aixin
collection PubMed
description The automobile covering parts mold is a key piece of equipment in the automobile industry, and its drawbead is the core element that affects the life of the mold and the quality of the parts made. Due to the complex structure of the mold cavity for covering parts, there exist differences between material flow characteristics, load conditions, stress strain, failure forms and so on in the surface of different parts of its drawbead and the different directions of the same part of the drawbead, thus putting forward new requirements for material strengthening. For the differentiated lose efficacy forms of the dangerous end faces of the tension bars, this study carried out research into the effect of laser quenching–shock peening strengthening (LQ-LSP) on the organization, plastic deformation resistance and wear resistance of Cr12MoV steel. It was shown that the microhardness (722.30 HV) and residual stress (−383.84 MPa) of the specimens were further enhanced after laser quenching–shock peening composite strengthening. The residual austenite content of the specimen was reduced to 0.8%, and the eutectic carbide distribution morphology was improved. After three rounds of laser composite peening, the specimens had the smallest displacement of the nanoindentation load–depth curve, which exhibited the greatest nanohardness (20.0 Pa) and modulus of elasticity (565.25 Pa), while reducing the coefficient of friction (0.61) and surface roughness (0.152 Ra). The smooth and flat surface of the specimen with shallow and narrow plow grooves improved the resistance of Cr12MoV steel to plastic deformation and wear.
format Online
Article
Text
id pubmed-9570892
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-95708922022-10-17 Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel Feng, Aixin Zhao, Jian Lin, Jinhao Pan, Xiaoming Feng, Huibin Wang, Changyu Lu, Zhengyuan Materials (Basel) Article The automobile covering parts mold is a key piece of equipment in the automobile industry, and its drawbead is the core element that affects the life of the mold and the quality of the parts made. Due to the complex structure of the mold cavity for covering parts, there exist differences between material flow characteristics, load conditions, stress strain, failure forms and so on in the surface of different parts of its drawbead and the different directions of the same part of the drawbead, thus putting forward new requirements for material strengthening. For the differentiated lose efficacy forms of the dangerous end faces of the tension bars, this study carried out research into the effect of laser quenching–shock peening strengthening (LQ-LSP) on the organization, plastic deformation resistance and wear resistance of Cr12MoV steel. It was shown that the microhardness (722.30 HV) and residual stress (−383.84 MPa) of the specimens were further enhanced after laser quenching–shock peening composite strengthening. The residual austenite content of the specimen was reduced to 0.8%, and the eutectic carbide distribution morphology was improved. After three rounds of laser composite peening, the specimens had the smallest displacement of the nanoindentation load–depth curve, which exhibited the greatest nanohardness (20.0 Pa) and modulus of elasticity (565.25 Pa), while reducing the coefficient of friction (0.61) and surface roughness (0.152 Ra). The smooth and flat surface of the specimen with shallow and narrow plow grooves improved the resistance of Cr12MoV steel to plastic deformation and wear. MDPI 2022-09-27 /pmc/articles/PMC9570892/ /pubmed/36234035 http://dx.doi.org/10.3390/ma15196693 Text en © 2022 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
Feng, Aixin
Zhao, Jian
Lin, Jinhao
Pan, Xiaoming
Feng, Huibin
Wang, Changyu
Lu, Zhengyuan
Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title_full Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title_fullStr Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title_full_unstemmed Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title_short Effect of Laser Quenching-Shock Peening Strengthening on the Microstructure and Mechanical Properties of Cr12MoV Steel
title_sort effect of laser quenching-shock peening strengthening on the microstructure and mechanical properties of cr12mov steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9570892/
https://www.ncbi.nlm.nih.gov/pubmed/36234035
http://dx.doi.org/10.3390/ma15196693
work_keys_str_mv AT fengaixin effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT zhaojian effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT linjinhao effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT panxiaoming effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT fenghuibin effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT wangchangyu effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel
AT luzhengyuan effectoflaserquenchingshockpeeningstrengtheningonthemicrostructureandmechanicalpropertiesofcr12movsteel