深冷处理次数对E690钢磨损性能与耐腐蚀性能的影响  

Effect of Cryogenic Treatment Times on Wear and Corrosion Resistance of E690 Steel

作　　者：王建波 孙新宇 苏波泳 张森 WANG Jianbo;SUN Xinyu;SU Boyong;ZHANG Sen(Engineering Training Center of Nantong University,Nantong 226019,China;College of Mechanical Engineering,Nantong University,Nantong 226019,China;Tai Shan Insitute of Science and Technology,Tai'an 271000,China)

机构地区：[1]南通大学工程训练中心,江苏南通226019 [2]南通大学机械工程学院,江苏南通226019 [3]泰山科学技术研究院,山东泰安271000

出　　处：《热加工工艺》2022年第24期147-151,共5页Hot Working Technology

基　　金：国家重点研发计划项目(2019YFB2005300,2019YFB2005305);南通市应用研究计划项目(JC2019060)。

摘　　要：研究深冷处理次数对海工用钢E690磨损性能与耐腐蚀性能的影响,对E690钢进行-190℃总时长为6 h的单次深冷和多次循环深冷。采用光学显微镜对试样进行金相组织观察,采用摩擦磨损试验机测量摩擦系数,采用失重法比较不同试样的磨损性能,采用SEM观察磨痕表面形貌,采用电化学工作站测定极化曲线。结果表明,深冷处理后,E690钢相对磨损率最多下降11.4%,自腐蚀电位从-0.57 V最大升至-0.43 V,深冷处理促使了试样中显微组织转变为马氏体和贝氏体,细小碳化物析出且弥散于基体中,从而提高E690钢性能。3次循环深冷后试样各项性能达到最优,4次循环深冷后各项性能变化不大,其中耐腐蚀性略降低。The effect of cryogenic treatment times at -190 ℃ for a total length of 6 h on the wear and corrosion resistance properties of marine steel E690 were studied. The metallographic structure of the sample was observed by optical microscope and the friction coefficient was measured by the friction-wear tester. The wear properties of different samples were compared by weight loss method. The wear morphologies were investigated by SEM. The polarization curves were measured at an electrochemical workstation. The results show that the relative wear rate of E690 steel decreases by 11.4% at most after cryogenic treatment. The maximum self-corrosion potential increases from -0.57 V to -0.43 V. The cryogenic treatment promotes the transformation of the micro-structure into martensite and bainite. Meanwhile, fine carbides are precipitated and dispersed in the matrix. As a result, E690 steel performance is improved. After 3 cycles of cryogenic, the properties of the samples reaches the optimum, and the properties of the samples change little after 4 cycles of cryogenic, among which the corrosion resistance is slightly reduced.

关 键 词：E690钢 深冷处理 显微组织 磨损机理 腐蚀 

分 类 号：TG156.91[金属学及工艺—热处理]