电机用轴承材料不同生产环节碳化物的定量表征和分析

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Quantitative Characterizationand Analysis of CarbidesatDifferent Production StagesofMotorBearingMaterials

YUHaibao1 BAI Qincheng1 CUI Yongfeng1 XIETingting1 GUO Zhongtang² （1. Zibo Municipal General Institute of Inspectionand Metrology;2.Zibo Transportation Group Co.，Ltd.）

Abstract：Bearingsare widelyused inmodernindustry，and their performance largelydependsonthemorphologyand distributionoftheircarbides.This paper testsandcharacterizes thevariationpatternsofcarbides in GCrl5bearing stel in diferentproductionprocesses.Inthehot-roledstate，thereticularcarbidesaredistributedintermitentlyalongtheaustenite grain boundaries，with an average width of 0.28μm and an area fraction of approximately 4.8% .After spheroidizing annealing，thereticularcarbidesmeltandfusetoformsphericalcarbides，andthelamellarcementitesinpearlitealsoundergo spheroidization and form spherical carbides.The average particle size of these spherical carbides is 0.42μm and their volume fractionisapproximately 14.5% .By controlling the hot rolling temperature and cooling rate，the formation of reticular carbides canbereduced.Byspheroidizinganealing，reticularcarbidescanbe transformed intosphericalcarbides，improving the performance of bearing steel.

Keywords：bearing steel; hot rolling;spheroidizing annealing;carbides

0 引言

在现代工业领域中，电机作为一种关键的动力设备，广泛应用于各个行业，是推动工业生产与社会运转的重要力量。（剩余4210字）