离子渗氮对304不锈钢组织和性能的影响  

Effect of ion nitriding on microstructure and properties of 304 stainless steel

作　　者：牛毅[1,2] 贺占胥 王明利 张杰 牛文朋 刘贯军 Niu Yi;He Zhanxu;Wang Mingli;Zhang Jie;Niu Wenpeng;Liu Guanjun(Higher Vocational and Technical College,Henan Institute of Science and Technology,Xinxiang Henan 453600,China;Xinxiang Gaofu Machinery Co.,Ltd.,Xinxiang Henan 453700,China;School of Mechanical and Electrical Engineering,Henan Institute of Science and Technology,Xinxiang Henan 453003,China)

机构地区：[1]河南科技学院高等职业技术学院,河南新乡453600 [2]新乡市高服机械股份有限公司,河南新乡453700 [3]河南科技学院机电学院,河南新乡453003

出　　处：《金属热处理》2022年第8期287-291,共5页Heat Treatment of Metals

基　　金：河南省联合自然基金(U1804142)。

摘　　要：为了提高旋振筛机在筛分锂能电池的正、负极材料时的使用寿命和物料的纯洁度,研究了304不锈钢试块在520℃下离子渗氮时间对其组织、硬度和耐蚀性能的影响。利用维氏显微硬度计和光学显微镜对渗氮层进行了硬度和深度测试,用球盘式旋转摩擦磨损试验机对渗氮层进行了摩擦磨损性能测试,用电化学工作站进行了耐蚀性能测试,并用X射线衍射仪对试样渗层进行了物相分析。结果表明,相比未经渗氮处理,304不锈钢试块经过渗氮处理后,渗层30μm深度处的硬度提高了5~6倍,渗层相对耐磨性为未经处理的24.5倍;尽管耐盐蚀性能降低,但其耐碱蚀性能提高。考虑到锂能电池的正极材料偏碱性和负极材料中性特点,旋振筛机上的304不锈钢网架和筛框经过离子渗氮处理后既可以大大提高旋振筛机的使用寿命,还能提高所筛分物料的纯洁度。In order to improve the service life and the purity of the material when sieving the positive and negative materials of the lithium battery by the rotary vibrating screen, the microstructure, hardness and corrosion resistance of the 304 stainless steel test block ion nitrided at 520 ℃ for different time were studied. The hardness and depth of the nitrided layer were tested by Vickers microhardness and optical microscope, the friction and wear properties of the nitrided layer were tested by ball disc rotary friction and wear tester, the corrosion resistance was tested by electrochemical workstation, and the phase of the nitrided layer was analyzed by X-ray diffractometer. The results show that compared with the untreated 304 stainless steel, the hardness of the nitrided layer at 30 μm on 304 stainless steel is improved by 5-6 times, and the relative wear resistance of the nitrided layer is 24.5 times of that of the untreated 304 stainless steel. Although the salt corrosion resistance of the specimen ion nitrided decreases, the alkaline corrosion resistance improves. Considering the characteristics of alkaline cathode material and neutral cathode material of lithium energy battery, the 304 stainless steel grid and screen frame on the rotary vibrating screen can not only greatly improve the service life of the rotary vibrating screen, but also improve the purity of the screened materials.

关 键 词：304不锈钢 离子渗氮 硬度 耐磨性 耐腐蚀性 

分 类 号：TG113[金属学及工艺—物理冶金]