25Cr3Mo真空氮化膜的耐蚀性能研究  

Investigation on Corrosion Performance of Vacuum Nitriding Layer on 25Cr3Mo

作　　者：刘静[1] 刘运锦[1] 陆旭锋[1] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550001

出　　处：《铸造技术》2013年第6期695-697,共3页Foundry Technology

基　　金：贵州省重大专项资助项目(黔科合重大专项字[2010]6607号)

摘　　要：对25Cr3Mo钢进行真空渗氮处理。对其渗氮层组织进行金相观察及显微硬度分析,并结合能谱线扫描(EDS)对渗氮层进行了进一步分析研究,最后利用盐雾腐蚀试验对真空氮化处理前后的试样进行加速腐蚀,用腐蚀增重对比分析试样在盐雾环境中的腐蚀情况。结果表明:随着渗氮时间的延长,白亮层厚度增加,硬度也增加,但耐腐蚀性能呈现先下降后增加的趋势,经6 h真空氮化的试样具有最优的耐蚀性能。Vacuum nitriding was used in the surface modification of 25Cr3Mo.The microstructure of the nitrided layer was observed by metallurgical microscope, and the surface hardness was tested. The original sample and the processed samples were tested under the condition of salt spray. The corrosion rates of the experimental group and the control group in salt fog environment were examined with the method of corrosion weight increase. The corrosion features of 25Cr3Mo was studied by EDS. The results show that, with the increase of nitriding time, white layer thickness and hardness increase, but the corrosion resistance firstly decreases and then increases, the samples after vacuum nitriding for 6 h has the best corrosion resistance.

关 键 词：25Cr3Mo 真空渗氮 耐蚀性能 

分 类 号：TG174.445[金属学及工艺—金属表面处理]