| 轧后冷却速率对GCr15轴承钢球化组织的影响 |
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| 引用本文： | 韩东序,杜林秀,吴红艳,齐敏.轧后冷却速率对GCr15轴承钢球化组织的影响[J].东北大学学报(自然科学版),2019,40(10):1392-1397. |
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| 作者姓名： | 韩东序 杜林秀 吴红艳 齐敏 |
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| 作者单位： | 东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819;东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819;东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819;东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819 |
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| 基金项目： | 国家高技术研究发展计划项目(2015AA03A501). |
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| 摘 要： | 采用电子探针和透射电子显微镜研究了模拟热轧后不同冷却速率对网状碳化物析出及后续离异共析转变过程中显微组织转变的影响.结果表明:在先共析碳化物形成温度区间采用快冷处理可以抑制网状碳化物的形成，减小片状珠光体的片层间距.当冷速控为20℃/s时，采用离异共析处理方式可将球化退火时间降低约2h，硬度可达1.95GPa左右.选区电子衍射分析表明球化处理后的球状碳化物类型为M3C，冷速的调控不会改变球化处理后碳化物的种类.
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| 关 键 词： | 轴承钢 珠光体 球化退火 网状碳化物 硬度 |
| 收稿时间： | 2018-11-15 |
| 修稿时间： | 2018-11-15 |
Effect of Cooling Rate on Spheroidized Microstructure of GCr15 Bearing Steel |
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| HAN Dong-xu,DU Lin-xiu,WU Hong-yan,QI Min.Effect of Cooling Rate on Spheroidized Microstructure of GCr15 Bearing Steel[J].Journal of Northeastern University(Natural Science),2019,40(10):1392-1397. |
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| Authors: | HAN Dong-xu DU Lin-xiu WU Hong-yan QI Min |
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| Institution: | State Key Laboratory of Rolling Technology and Automation， Northeastern University， Shenyang 110819，China. |
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| Abstract: | The effect of cooling rate after a simulated hot-rolling process on the microstructures of network carbide precipitation and subsequent divorced eutectoid transformation in GCr15 bearing steel was investigated using electron probe and transmission electron microscopy. The results indicated that the rapid cooling treatment in the range of pre-eutectoid carbide formation temperature can inhibit the formation of network carbides and reduce the inter-lamellar spacing of flaky pearlite in the steel.When the cooling rate is 20℃/s， the spheroidizing annealing time can be reduced to about 2h in divorcing eutectoid treatment and the hardness of the tested sample reaches 1.95GPa.The results from selected-area electron diffraction show that the type of spheroidal carbide in the steel after spheroidization is M3C， which can not be changed by the regulation of cooling rate. |
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| Keywords: | bearing steel pearlite spheroidizing annealing network carbides hardness |
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