Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel

In this study, the effect of cryogenic treatment on the microstructure, especially the retained austenite (RA) evolution behavior, and mechanical properties of 55Cr17Mo1VN plastic die steel was investigated. The quenching microstructure consisted of martensite, RA, and undissolved carbides. After th...

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Autores principales:	Congpeng Kang, Fubin Liu, Zhouhua Jiang, Haoyang Suo, Xinhao Yu, Haibao Zhang, Shineng Ding
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Cryogenic treatment Retained austenite Martensite Mechanical properties Precipitates Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/2a610702325940a68f9a4f15caf56d11
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spelling	oai:doaj.org-article:2a610702325940a68f9a4f15caf56d112021-11-12T04:35:55ZEffect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel2238-785410.1016/j.jmrt.2021.10.124https://doaj.org/article/2a610702325940a68f9a4f15caf56d112021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012606https://doaj.org/toc/2238-7854In this study, the effect of cryogenic treatment on the microstructure, especially the retained austenite (RA) evolution behavior, and mechanical properties of 55Cr17Mo1VN plastic die steel was investigated. The quenching microstructure consisted of martensite, RA, and undissolved carbides. After the cryogenic treatment, the RA volume fraction decreased from 44.7 to 35.4%, while the hardness increased from 39.0 to 54.6 HRC because of the increase in the dislocation density. Besides, the “new martensite” phase broke the blocky RA phase during the cryogenic treatment, and the two phases keep a strict K–S or N–W orientation relationship, which improved the stability of the steel. Interestingly, in the cryogenically treated sample, the RA decomposed completely. On the other hand, the untreated sample retained 20.7% of its RA phase after the tempering process. The cryogenic treatment decreased the thermal stability of the RA phase during the tempering process, which can be attributed to the release of the hydrostatic pressure and the generation of a large number of precipitates from the RA phase. As a result of precipitation strengthening, fine grain strengthening, and dislocation strengthening, the cryogenically treated sample showed excellent tensile strength (∼2241 MPa) and high hardness (∼56.2 HRC).Congpeng KangFubin LiuZhouhua JiangHaoyang SuoXinhao YuHaibao ZhangShineng DingElsevierarticleCryogenic treatmentRetained austeniteMartensiteMechanical propertiesPrecipitatesMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5128-5140 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cryogenic treatment Retained austenite Martensite Mechanical properties Precipitates Mining engineering. Metallurgy TN1-997
spellingShingle	Cryogenic treatment Retained austenite Martensite Mechanical properties Precipitates Mining engineering. Metallurgy TN1-997 Congpeng Kang Fubin Liu Zhouhua Jiang Haoyang Suo Xinhao Yu Haibao Zhang Shineng Ding Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
description	In this study, the effect of cryogenic treatment on the microstructure, especially the retained austenite (RA) evolution behavior, and mechanical properties of 55Cr17Mo1VN plastic die steel was investigated. The quenching microstructure consisted of martensite, RA, and undissolved carbides. After the cryogenic treatment, the RA volume fraction decreased from 44.7 to 35.4%, while the hardness increased from 39.0 to 54.6 HRC because of the increase in the dislocation density. Besides, the “new martensite” phase broke the blocky RA phase during the cryogenic treatment, and the two phases keep a strict K–S or N–W orientation relationship, which improved the stability of the steel. Interestingly, in the cryogenically treated sample, the RA decomposed completely. On the other hand, the untreated sample retained 20.7% of its RA phase after the tempering process. The cryogenic treatment decreased the thermal stability of the RA phase during the tempering process, which can be attributed to the release of the hydrostatic pressure and the generation of a large number of precipitates from the RA phase. As a result of precipitation strengthening, fine grain strengthening, and dislocation strengthening, the cryogenically treated sample showed excellent tensile strength (∼2241 MPa) and high hardness (∼56.2 HRC).
format	article
author	Congpeng Kang Fubin Liu Zhouhua Jiang Haoyang Suo Xinhao Yu Haibao Zhang Shineng Ding
author_facet	Congpeng Kang Fubin Liu Zhouhua Jiang Haoyang Suo Xinhao Yu Haibao Zhang Shineng Ding
author_sort	Congpeng Kang
title	Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
title_short	Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
title_full	Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
title_fullStr	Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
title_full_unstemmed	Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
title_sort	effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2a610702325940a68f9a4f15caf56d11
work_keys_str_mv	AT congpengkang effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT fubinliu effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT zhouhuajiang effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT haoyangsuo effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT xinhaoyu effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT haibaozhang effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel AT shinengding effectofcryogenictreatmentonmicrostructureevolutionandmechanicalpropertiesofhighnitrogenplasticdiesteel
_version_	1718431221157986304

Effect of cryogenic treatment on microstructure evolution and mechanical properties of high nitrogen plastic die steel

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