超声表面轧制改善GCr15钢的表面组织和力学性能

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research-ibero-american Journal of Materials Pub Date : 2023-02-27 DOI:10.1590/1980-5373-mr-2022-0606
Xianmeng Xue, Shubo Xu, Xiquan Ma, JuanJuan Han, Wei Zheng
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引用次数: 1

摘要

采用超声表面轧制工艺(USRP)对gcr15轴承钢进行强化。建立了USRP有限元三维模型,分析了轴承钢表面的残余压应力和等效塑性应变分布。采用SEM、EBSD、x射线衍射(XRD)和电化学技术对USRP处理前后的微观结构、硬度、表面粗糙度和耐蚀性进行了表征。结果表明:USRP处理能显著改善材料的表面显微组织和残余压应力分布,获得约60μm的塑性应变层;USRP处理后,籽粒平均错取向(KAM)增加,位错活动性增强,导致晶界附近聚集,lagb的比例增加到38.8%。在表面晶粒细化、残余压应力和高光泽度表面的共同作用下,自腐蚀电流密度降低了两个数量级,耐蚀性显著提高。本研究提出了一种解决轴承失效问题的方法,并对理解超声表面轧制加工的变形机理具有重要意义。
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Surface Microstructure Refinement and Mechanical Properties of GCr15 Steels Improved During Ultrasonic Surface Rolling Processing
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来源期刊
Materials Research-ibero-american Journal of Materials
Materials Research-ibero-american Journal of Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
11.80%
发文量
161
审稿时长
3 months
期刊介绍: Information not localized
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