2Cr13钢的表面气体渗氮处理  

Surface nitriding for 2Cr13 steel

作　　者：杨剑群[1] 刘勇[1] 叶铸玉[1] 杨德庄[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《金属热处理》2009年第7期16-18,共3页Heat Treatment of Metals

摘　　要：用光学金相显微镜、扫描电子显微镜、X射线衍射(XRD)仪及显微硬度计对经气体渗氮处理的2Cr13钢试样进行了组织结构分析,并利用销-盘摩擦磨损试验机对渗氮的盘与未渗氮销摩擦副进行摩擦磨损试验。结果表明,520℃×20 h渗氮可使2Cr13马氏体不锈钢的渗氮层深度达到165μm,处理后试样的显微硬度约为处理前的2.5倍。处理后试样的耐磨性能得到了较大的提高,渗氮盘试样的磨损表面未出现裂纹,而未渗氮销的磨损表面存在严重的裂纹。The microstructure of 2Cr13 steel samples after gas nitriding was analyzed with optical microscopy, SEM, XRD and microhardness tester. Wear behavior of the gas nitrided 2Cr13 steel disk against unitrided 2Cr13 pins was investigated using a pin-on-disk type tribometer. The results show that gas nitriding at 520℃ for 20 h can obtain the nitrided depth of 2Cr13 steel up to 165μm. The microhardness of samples after nitriding increased by 2. 5 times compared with unitrided samples. The wear resistance of samples are increased significantly after nitriding. It is observed that there are no cracks appearing on the worn surfaces of nitrided 2Cr13 disks while severe cracks are appearing on the worn surfaces of unitrided 2Cr13 pins.

关 键 词：2CR13钢 气体渗氮 渗氮层 耐磨性 

分 类 号：TG156.8[金属学及工艺—热处理]