首页|Notably Accelerated Nano-Bainite Transformation via Increasing Undissolved Carbides Content on GCr1 5Si1 Mo Bearing Steel

Notably Accelerated Nano-Bainite Transformation via Increasing Undissolved Carbides Content on GCr1 5Si1 Mo Bearing Steel

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In this study,a high-carbon nano-bainitic GCr15SilMo bearing steel was investigated.Specifically,the effects of content and size of undissolved carbides on the microstructure and transformationkinetics of nano-bainite were analyzed.The results demonstrated that after prolonged austempering at low temperatures,the mixed microstructure composed of nano-bainite(NB),undissolved carbides(UC),and retained austenite(RA)was obtained in GCr15SiMo steel.When the experimental steel was austenitized at 900 ℃,the undissolved carbides gradually dissolved until reaching a stable state with increasing holding time.Furthermore,at the same austempering temperature,despite different volume fractions of undissolved carbides in the substrate,the volume fractions of nano-bainite in the final microstructures remained essentially the same.Moreover,the higher the content of undissolved carbides in steel,the faster the transformation rate of nano-bainite and the shorter the total transformation time.

Nano-bainiteUndissolved carbidesBainitic transformation kineticsCarbon concentration

Yan-Hui Wang、Hua-Qiang Sun、Wen-Jing Feng、Lei-Jie Zhao、Xiang Chen、Qing-An Chen、Hai-Tao Sun、Jian-Jun Wang、Zhi-Nan Yang

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Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province,School of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan 056038,China

Collaborative Innovation Center for Modern Equipment Manufacturing of Jinan New Area,Hebei University of Engineering,Handan 056038,China

School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

Avic Shang da Superalloys Company Limited,Xingtai 054800,China

National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHebei Natural Science FoundationHebei Natural Science FoundationHebei Natural Science FoundationScience and Technology Project of Hebei Education DepartmentCentral Guidance for Local Science and Technology Development Funding Project

5200110552122410E2022402107E2023203259E2020402101BJ2021012236Z1021G

2024

10.1007/s40195-023-01652-2

金属学报(英文版)
中国金属学会

金属学报(英文版)

CSTPCD
影响因子：0.77
ISSN：1006-7191
年,卷(期)：2024.37(4)
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