2Cr13钢440℃等离子体渗氮  

Plasma nitriding of 2Cr13 steel at 440 ℃

作　　者：由园[1,2] 闫纪红[1] 闫牧夫[3] 景立伟[2] 陶玉斌[2] 王超会[2] 孙皓[2] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001 [2]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006 [3]哈尔滨工业大学金属精密热加工国家级重点实验室材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《金属热处理》2017年第5期172-175,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(51401113;51371070);黑龙江省科学基金(E2016069;E2015044);黑龙江省博士后经费(LBH-Z16061)

摘　　要：对2Cr13钢进行了440℃等离子体渗氮,利用金相显微镜(OM)、分析天平、X射线衍射仪(XRD)、显微硬度计和电化学工作站等仪器,对渗氮层的显微结构、增重、相组成、硬度分布和耐腐蚀性能进行了测试。结果表明:2Cr13钢在440℃氮氢比为1∶3条件下渗氮4 h、8 h和16 h后,渗氮层厚度逐渐增加,最厚为58.9μm;渗氮层质量随时间的增加而增大,增重最高为1.57×10^(-3)g/cm^2;渗氮层显微硬度显著增高,最大为1170.0 HV0.05;渗氮层表面由ε-Fe_3N和γ'-Fe_4N组成;渗氮层表面极化曲线出现钝化区,腐蚀速率显著下降,耐蚀性显著提高。Plasma nitriding for 2Cr13 steel is carried out at 440℃ for 4h, 8h and 12h with nitrogen hydrogen ratio of 1：3. The nitrided surface layer＇s microstructures, mass gain, phase composition, microhardness and corrosion resistance are characterized by optical microscopy, analytical balance, XRD, microhardness tester and electrochemical workstation. The result shows that layer depth and mass gain increase with the increasing of nitriding time, reaching to 58.9 μm and 1.57×10-3g/cm2 respectively. The microhardness of the nitrided layer is significantly increased with the greatest value of 1170.0 HV0.05. The microstrueture in the nitriding layers mainly consists of ε-Fe3N and γ′-Fe4N. The corrosion resistance of the nitriding steel is remarkably enhanced.

关 键 词：2CR13钢 等离子体渗氮 显微组织 显微硬度 耐蚀性 

分 类 号：TG156.8[金属学及工艺—热处理]