【摘要】：利用表面機(jī)械研磨(SMAT)對(duì)304不銹鋼進(jìn)行表面自納米化處理,并對(duì)其納米化表面進(jìn)行滲碳處理。利用光學(xué)顯微鏡、X-射線衍射儀、磨料磨損試驗(yàn)機(jī)和顯微硬度儀對(duì)處理后的不銹鋼表面組織和性能進(jìn)行研究。結(jié)果表明:經(jīng)SMAT處理并滲碳后,滲碳層晶粒細(xì)化,組織發(fā)生奧氏體向馬氏體轉(zhuǎn)變,顯著提高了材料的力學(xué)性能;表面機(jī)械研磨處理后的材料的滲碳層厚度明顯高于直接滲碳的粗晶材料的滲碳層厚度,滲碳層組織中主要碳化物為Cr7C3和Cr23C6,顯微硬度也有明顯提高;經(jīng)過表面自納米化和滲碳復(fù)合處理,材料的耐磨性得到較大提升。
[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.
【作者單位】： 西南交通大學(xué)材料科學(xué)與工程學(xué)院;中車青島四方機(jī)車車輛股份有限公司;中車長(zhǎng)春軌道客車股份有限公司;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFB1200505-006)~~
【分類號(hào)】：TG156.81

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