准贝氏体钢渗碳层耐磨性及磨损机制研究  

Wear Resistance and Wear Mechanism of Carburized Layer of Meta-Bainitic Steel

作　　者：贺自强[1] 康沫狂[2] 杨延清[2] 王新林[1] 

机构地区：[1]钢铁研究总院功能材料研究所,北京100081 [2]西北工业大学材料科学与工程学院,陕西西安710072

出　　处：《材料热处理学报》2004年第4期72-76,共5页Transactions of Materials and Heat Treatment

摘　　要：研究了准贝氏体钢销盘磨料磨损和冲击磨料磨损的耐磨性和磨损机制 ,确定了回火温度对耐磨性的影响 ,探讨了残余奥氏体的机械稳定性及其对耐磨性的作用。结果表明 :准贝氏体钢渗碳层的耐磨性接近或优于 18Cr2Ni4WA钢 ;以微切削型磨料磨损为主的准贝氏体钢渗碳件 ,宜采用 180℃回火 ,以应变疲劳型磨料磨损为主的准贝氏体钢渗碳件 ,宜采用 2 80℃回火 ;残余奥氏体的机械稳定性对材料的耐磨性具有重要作用。对于微切削型磨料磨损 ,机械稳定性高的残余奥氏体不利于提高耐磨性 ;对于应变疲劳型磨料磨损 ,机械稳定性高的残余奥氏体明显提高耐磨性。Wear resistance and wear mechanism of carburized layer of meta-bainitic steel in pin-on-disk abrasive wear and impact abrasive wear were investigated. The mechanical stability of retained austenite and its effect on wear resistance are discussed. The results show that the wear resistance of carburized layer of meta-bainitic steel approach or supevior to that of 18Cr2Ni4WA steel. Tempering at 180°C is recommended for the carburized parts of meta-bainitic steel subjected to micro-cutting abrasive wear, and for the carburized parts of meta-bainitic steel subjected to strain-fatigue abrasive wear the recommended tempering temperature is 280°C. The mechanical stability of retained austenite has a great effect on the resistance to abrasive wear. The retained austenite with high mechanical stability is not of benefit to wear resistance for micro-cutting abrasive wear, but is of obvious benefit to wear resistance for strain-fatigue abrasive wear.

关 键 词：准贝氏体钢 渗碳层 耐磨性 磨损机制 残余奥氏体 机械稳定性 

分 类 号：TG156.8[金属学及工艺—热处理] TG113[金属学及工艺—金属学]