摘要
对GCr15Si1MoV新型微合金化轴承钢进行Ms以上温度等温淬火处理和回火处理,利用扫描电镜、X射线衍射仪、电化学工作站研究了不同等温淬火工艺对试验钢微观组织与耐蚀性能的影响。结果表明:等温淬火+回火后试验钢微观组织主要为贝氏体、薄膜状残留奥氏体及少量回火马氏体,同时分布着球状未溶碳化物;在200℃等温淬火时,在24 h等温后试验钢耐蚀性最佳,随着等温时间的延长,残留奥氏体体积分数降低的同时其稳定性增加,致使试验钢的耐蚀性能随之提高;等温24 h时,随着等温淬火温度升高,试验钢的耐蚀性能呈先上升后降低趋势,未溶碳化物含量增加会降低试验钢的耐蚀性能。
Novel microalloyed bearing steel GCr15Si1MoV was performed with austempering treatment above Ms and tempering.The effects of different austempering processes on the microstructure and corrosion resistance of the tested steel were studied by means of scanning electron microscope,X-ray diffractometer and electrochemical workstation.The results show that the microstructure of the tested steel after austempering and tempering is mainly composed of bainite,film-like retained austenite and a small amount of tempered martensite,with distribution of spherical undissolved carbides.After austempering at 200 ℃ for 24 h,the steel achieves the best corrosion resistance.With the extension of austempering time,the volume fraction of retained austenite decreases with its increasing stability,resulting in an improvement in the corrosion resistance of the tested steel.When austempered for 24 h,as the austempering temperature increases,the corrosion resistance of the tested steel first increases and then decreases.The increase in content of undissolved carbides reduces the corrosion resistance of the steel.
作者
朱丽华
张银萍
刘柏松
冯文静
李丽
秦峰
张欣杰
王艳辉
Zhu Lihua;Zhang Yinping;Liu Baisong;Feng Wenjing;Li Li;Qin Feng;Zhang Xinjie;Wang Yanhui(Henan Boiler and Pressure Vessel Inspection Technology Research Institute,Zhengzhou Henan 450003,China;Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province,Hebei University of Engineering,Handan Hebei 056038,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei Anhui 230009,China;Key Laboratory of Hebei Province on High Temperature Alloy Regeneration Technology,Zhonghangshangda Superalloys Co.,Ltd.,Xingtai Hebei 054800,China)
出处
《金属热处理》
北大核心
2025年第5期16-21,共6页
Heat Treatment of Metals
基金
河北省高等学校科学技术研究产学研合作专项(CXY2024040)
河南省基本科研业务费支持项目(2023KY12)
中航上大高温合金材料股份有限公司院士合作重点单位项目
邢台市重大科技专项(2023ZZ001)
河北省军民融合科技创新项目(SJMYF202409)。
关键词
新型微合金化轴承钢
低温贝氏体
残留奥氏体
未溶碳化物
耐蚀性能
novel microalloyed bearing steel
low temperature bainite
retained austenite
undissolved carbides
corrosion resistance
