摘要
对40CrNiMo截齿用钢渗碳后再渗铌强化处理,用金相显微镜、扫描电镜及能谱、X射线衍射仪分析了渗铌层的组织与成分,并分别与常规强化样品在实验室和工况下作耐磨性对比试验。结果表明,渗铌层主要由NbC和Nb6C5构成,碳-铌复合渗强化试样的磨损量只是常规强化样的58.4%,其截齿使用寿命提高了69%～78%。
Strengthening treatment of carburizing and subsequently niobiumizing of 40CrNiMo steel used for cutting pick was carried out,and the microstructure and composition of niobiumizing layer are investigated by metallographic microscope,SEM and EDS,and XRD,which are compared with conventional strengthening treatment specimens in lab and working situation respectively.The results indicate that the main phases are NbC and Nb6C5in the niobiumized layer,and the loss weight of carbo-niobiumizing specimens is 58.4% of conventional strengthening ones,and the service life of cutting pick is increased by 69%-78%.
出处
《金属热处理》
CAS
CSCD
北大核心
2012年第3期99-102,共4页
Heat Treatment of Metals
