高强轴承钢GCr15在NaCl溶液中的腐蚀行为  

Corrosion Behavior of High Strength Bearing Steel GC15 in NaCl Solution

作　　者：刘珑[1] 时军波[1] 徐娜[1] 李囡 丁秋月 丁宁[1] 胡志文[2] LIU Long;SHI Junbo;XU Na;LI Nan;DING Qiuyue;DING Ning;HU Zhiwen(Shandong Engineering Technology Center for Material Failure Analysis and Safety Assessment,Shandong Academy of Sciences,Jinan 250014,China;Department of Physics and Materials Science,City University of Hongkong,Hongkong 999077,China)

机构地区：[1]山东省科学院山东省材料失效分析与安全评估工程技术研究中心,济南250014 [2]香港城市大学物理及材料科学系,香港999077

出　　处：《腐蚀与防护》2018年第12期897-900,911,共5页Corrosion & Protection

基　　金：国家自然科学基金(11404192;11605106);山东省重点研发计划项目(2015GSF120002);山东省"泰山学者"海外特聘专家专项经费(tshw20120745);山东省优秀中青年科学家科研奖励基金(BS2014CL002);山东省科学院青年基金(2015QN003;2017QN001)

摘　　要：对高强轴承钢GCr15进行了淬火加低温回火的热处理,通过金相显微镜、体式显微镜和电子探针等手段研究了热处理后GCr15钢在NaCl溶液中腐蚀后的组织变化和腐蚀行为。结果表明:热处理后GCr15钢在NaCl溶液中会发生严重局部腐蚀;热处理后GCr15钢的局部存在诱发腐蚀的活性点,故该位置较早发生腐蚀;回火马氏体的耐蚀性较差,发生吸氧腐蚀,而回火马氏体之间的残余奥氏体具有较强的耐蚀性,对基体的进一步腐蚀有一定的阻碍作用。Heat - treatment of quenching and low - temperature tempering was conducted for high strength bearing steelGCr15.The changes of microstructure and corrosion behavior of the heat - treated GCr15steel corroded in NaClsolution were studied by means of metallographic microscope , stereo microscope and electron probe.The results showthat severe localized corrosion happened to the heat - treated GCr15steel corroded in NaCl solution.There were someactive points inducing localized corrosion in the heat- treated GCr15steel , so localized corrosion occurred early in thesepositions.The tempered martensite in the heat - treated GCr15steel suffered oxygen corrosion because of bad corrosionresistance , and the residual austenite in the tempered martensite could delay the further corrosion of substrate because of good corrosion resistance.

关 键 词：腐蚀行为 淬火 高强轴承钢GCr15 低温回火 

分 类 号：TG172.5[金属学及工艺—金属表面处理]