Cr12MoV钢CD渗碳后M／B_下复相组织对自攻钉搓丝板疲劳磨损失效的影响  

Effect of Duplex Microstructures of CD Carburized of Cr12MoV Steel on the Failure of Fatigue Wear in Self-Tapping Screw Dies

作　　者：王兴贵[1] 刘春梅[1] 夏立明[1] 卢弘 宁玫 

机构地区：[1]天津理工学院一分院,天津无缝钢管公司

出　　处：《材料工程》1995年第2期27-29,共3页Journal of Materials Engineering

摘　　要：分析了Ｃｒ１２ＭｏＶ钢渗碳等温处理后各区域的组织、弯曲断口形貌和自攻钉搓丝板疲劳磨损的机理，以及Ｍ／Ｂ_下复相组织对疲劳磨损的影响。试验结果表明，表层高含碳量的Ｍ推迟疲劳裂纹的形核期，Ｍ／Ｂ_下复相组织阻碍疲劳裂纹的扩展，认为高碳高合金模具钢通过ＣＤ渗碳等温处理是提高模具服役寿命的有效途径。his paper deals with the duplex microstructures of M/ B formed during austemepring after CD carbur-izing,the bending fracture topography,the michanism of fatigue wear in self-tapping screw dies and effectof duplex microstructure of M/ B on fatigue wear.The test revealed that the nucleation peried of fatiguecrack is put off because the martensite in carburizing layer keeps high carbon content,duplex microstruc-ture of M/Ehinder the spread of fatigue crack.The process of austemepring after CD carburing in highcarbon and alloy elements die steel seems to be effective methed that prolongs service life of dies.

关 键 词：渗碳 模具钢 疲劳 磨损 CR12MOV钢 

分 类 号：TG161.81[金属学及工艺—热处理]