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316L不锈钢准平衡气体渗碳层残余应力研究

Residual stress of paraequilibrium gas carburized layer on 316L austenitic stainless steel
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摘要 利用X线衍射仪(XRD)、电子探针(EPMA)、扫描电子显微镜(SEM)、光学显微镜(OM)研究了316L奥氏体不锈钢准平衡气体渗碳层的残余应力、碳质量分数分布以及微观结构。结果表明:准平衡气体渗碳层内为单一的扩张奥氏体相(S相)结构;C原子的渗入及碳质量分数梯度分布,导致渗碳层表面产生极高的压缩残余应力,局部发生塑性变形。 The residual stress, carbon mass ratio and microstructure of paraequilibrium carhurized layers on 316L austenitic stainless steel were analyzed by X-Ray diffraction (XRD), electron probe microanalyzer (EPMA) , scanning electron microscopy ( SEM ) , and optical microscope ( OM ). Results demonstrated that the carburized layer was single expanded austenite (S-phase). Extremely high compressive residual stress was generated on the surface of carburized layer due to the penetration of carbon atoms and its gradient.Plastic deformation was found on local carburized layer surface.
出处 《南京工业大学学报(自然科学版)》 CAS 北大核心 2015年第6期39-43,共5页 Journal of Nanjing Tech University(Natural Science Edition)
基金 国家自然科学基金(51475224) 江苏省高校自然科学研究重大项目(14KJA470002) 江苏省普通高校研究生科研创新计划(CXZZ12_0420)
关键词 奥氏体不锈钢 准平衡气体渗碳 压缩残余应力 austenitic stainless steel paraequilibrium gas carburization compressive residual stress
作者简介 荣冬松(1985-),男,江苏宿迁人,博士生,主要研究方向为奥氏体不锈钢表面强化及其性能;巩建鸣(联系人),教授,E-mail:gongjm@njtech.edu.cn.
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