表面纳米化对304不锈钢渗碳层组织和性能的影响
发布时间：2018-09-06 13:12
【摘要】：利用表面机械研磨(SMAT)对304不锈钢进行表面自纳米化处理,并对其纳米化表面进行渗碳处理。利用光学显微镜、X-射线衍射仪、磨料磨损试验机和显微硬度仪对处理后的不锈钢表面组织和性能进行研究。结果表明:经SMAT处理并渗碳后,渗碳层晶粒细化,组织发生奥氏体向马氏体转变,显著提高了材料的力学性能;表面机械研磨处理后的材料的渗碳层厚度明显高于直接渗碳的粗晶材料的渗碳层厚度,渗碳层组织中主要碳化物为Cr7C3和Cr23C6,显微硬度也有明显提高;经过表面自纳米化和渗碳复合处理,材料的耐磨性得到较大提升。
[Abstract]:The surface of 304 stainless steel was treated by surface mechanical grinding (SMAT), and the surface of 304 stainless steel was treated by Carburizing. The microstructure and properties of the treated stainless steel surface were studied by means of optical microscope X ray diffractometer, abrasive wear tester and microhardness tester. The results show that after SMAT treatment and Carburizing, the grain size of carburized layer is refined, and the austenite to martensite is transformed into martensite, which improves the mechanical properties of the material. The carburized layer thickness of the surface mechanical grinding treated material is obviously higher than that of the coarse grain material with direct carburizing. The main carbides in the carburized layer are Cr7C3 and Cr23C6, microhardness. After surface self-nanocrystalline treatment and Carburizing composite treatment, the wear resistance of the material was greatly improved.
【作者单位】： 西南交通大学材料科学与工程学院;中车青岛四方机车车辆股份有限公司;中车长春轨道客车股份有限公司;
【基金】：国家重点研发计划(2016YFB1200505-006)~~
【分类号】：TG156.81
[Abstract]:The surface of 304 stainless steel was treated by surface mechanical grinding (SMAT), and the surface of 304 stainless steel was treated by Carburizing. The microstructure and properties of the treated stainless steel surface were studied by means of optical microscope X ray diffractometer, abrasive wear tester and microhardness tester. The results show that after SMAT treatment and Carburizing, the grain size of carburized layer is refined, and the austenite to martensite is transformed into martensite, which improves the mechanical properties of the material. The carburized layer thickness of the surface mechanical grinding treated material is obviously higher than that of the coarse grain material with direct carburizing. The main carbides in the carburized layer are Cr7C3 and Cr23C6, microhardness. After surface self-nanocrystalline treatment and Carburizing composite treatment, the wear resistance of the material was greatly improved.
【作者单位】： 西南交通大学材料科学与工程学院;中车青岛四方机车车辆股份有限公司;中车长春轨道客车股份有限公司;
【基金】：国家重点研发计划(2016YFB1200505-006)~~
【分类号】：TG156.81
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