摘要
研究了固体硼碳共渗及复合渗技术工艺参数对12Cr13马氏体不锈钢的组织和性能的影响。共渗方面对12Cr13钢进行不同硼碳比例的固体硼碳共渗热处理;复合渗方面对12Cr13马氏体不锈钢先进行固体渗碳,然后再进行渗硼处理,得出最优的复合渗参数。对最优参数下的共渗及复合渗12Cr13马氏体不锈钢试样进行显微硬度、XRD物相结构、电化学下耐腐蚀和摩擦磨损性能检测分析。结果表明:共渗温度950℃、共渗6 h条件下,硼碳共渗最优渗剂硼碳比为6∶4;化学渗6 h条件下,硼碳复合渗最优参数为950℃渗碳,950℃渗硼;硼碳共渗和复合渗试件经过最终热处理(淬火+低温回火)后,表层组织硬度最高可达1 507.3 HV0.98 N,心部硬度为420.6 HV0.98 N,最优参数下硼碳共渗及复合渗渗层厚度分别为976μm和1 125μm;电化学测试表明硼碳共渗和硼碳复合渗处理后材料的耐蚀性有所提高,共渗腐蚀电位为-0.578 V,复合渗为-0.582 V。磨损试验显示硼碳共渗和硼碳复合渗后经化学热处理可以显著提高12Cr13马氏体不锈钢的耐磨性能。
The effects of technological parameters of solid boroncarburizing and boron⁃carbon compound carburizing on the microstructure and properties of 12Cr13 martensitic stainless steel were studied.For the co⁃carburizing,12Cr13 steel was treated by solid borocarburizing heat treatment with different boron⁃carbon ratios;as for the boron⁃carbon compound carburizing,12Cr13 martensitic stainless steel was solid carbu⁃rized first,then the boronizing treatment was carried out to get the optimal composite carburizing parameters.The microhardness,XRD phase structure,corrosion resistance under electrochemistry,friction and wear properties of 12Cr13 martensitic stainless steel samples under the opti⁃mum co⁃carburizing and compound carburizing parameters were tested and analyzed.Results showed that under the co⁃carburizing conditions of 950℃and 6 h,the optimum boron⁃carbon ratio of borocarburizing agent was 6:4;Under the condition of chemical compound carburizing for 6 h,the optimum parameters of boron⁃carbon compound carburizing were 950℃carburizing and 950℃boronizing.After the final heat treat⁃ment(quenching+low temperature tempering)of borocarburizing and compound carburizing test pieces,the hardness of the surface layer could reach 1507.3 HV 0.98 N,and the hardness of the core was 420.6 HV 0.98 N.The thickness of the borocarburizing and compound carburizing layers under the optimum parameters was 976μm and 1125μm,respectively.The electrochemical test showed that the corrosion resistance of the material was improved after borocarburizing and boron⁃carbon compound carburizing,and the corrosion potential was-0.578 V for borocarburi⁃zing and-0.582 V for boron⁃carbon compound carburizing.The wear test showed that the borocarburizing and boron⁃carbon compound carburi⁃zing could significantly improve the wear resistance of 12Cr13 martensitic stainless steel.
作者
邵红红
刘凡
李承龙
赵恩旭
杨柳
程晓农
SHAO Hong-hong;LIU Fan;LI Cheng-long;ZHAO En-xu;YANG Liu;CHENG Xiao-nong(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《材料保护》
CAS
CSCD
2023年第3期98-105,共8页
Materials Protection
关键词
马氏体不锈钢
硼碳共渗
硼碳复合渗
硬度
耐磨性
martensitic stainless steel
borocarburizing
boron⁃carbon compound carburizing
hardness
wear resistance
