碳化铬表面增强Q390钢的耐磨与耐腐蚀性研究  

RESEARCH ON THE WEAR AND CORROSION RESISTANCE OF Q390 STEEL SURFACE REINFORCED BY CHROMIUM CARBIDE

作　　者：米永刚[1] 张海龙[1] 

机构地区：[1]西京学院,西安710123

出　　处：《钢结构》2017年第4期113-116,共4页Steel Construction

基　　金：西京学院院级科研项目(XJ130231);西京学院科研项目(XJ130226);全国工程专业学位研究生教育2016-2017年度研究课题(2016-ZX-437);陕西省教育厅科研项目(15JK2171)

摘　　要：以高碳铬铁粉为原料,采用等离子喷涂方法,利用高温下高碳铬铁中的铬与碳元素的原位反应,在Q390钢表面原位生成高硬度碳化铬增强层,对其微观组织、硬度分布、摩擦磨损性能和耐蚀性能进行研究。结果表明,采用等离子喷涂法在Q390工字钢表面制备出碳化物增强层,厚度约为110μm,内部组织为奥氏体和(Fe,Cr)7C3型碳化铬,表面硬度平均值为106 HRB,是基体硬度的1.4倍。表面碳化物增强层的耐磨性能较Q390钢基体明显提高,载荷为100 N时,表面摩擦系数降低到0.24。表面碳化物增强层的耐腐蚀性能明显提高,在中性盐雾环境中腐蚀480 h后的质量损失率仅为2.1%。Based on the in-suit reaction between chromium and carbide of high carbon ferrochrome at high temperatures,the microstructure,hardness distribution,wear resistance and corrosion resistance of chromium carbide surface reinforced Q390 steel were studied by high carbon ferrochrome plasma spraying.The results showed that the chromium carbide reinforced layer could be prepared on Q390 steel by plasma spraying,and the thickness of the layer was about 110 μm.The main phases of the layer were austenite and（Fe,Cr）7C3.The average hardness of the layer was 106 HRB,which was 1.4 times than that of the matrix.The corrosion resistance of Q390 steel improved obviously after plasma spraying,and the mass loss rate was only 2.1% after neutral salt corrosion.

关 键 词：Q390钢 碳化铬 耐磨性能 耐腐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]