35SiMnMo截齿钢淬火不同温度回火组织和性能的研究  

Effects of Quenching and Different Temperature Tempering on Microstructure and Properties of 35SiMnMo Pick Steel

作　　者：徐美玲[1] 程巨强[1] 刘志学[1] 刘男杰[1] 

机构地区：[1]西安工业大学材料与化工学院,西安710032

出　　处：《煤矿机械》2011年第10期70-72,共3页Coal Mine Machinery

基　　金：陕西省教育厅专项科研计划项目(09JK489)

摘　　要：研制了一种截齿用新型35SiMnMo钢,研究了淬火不同温度回火对新型截齿钢组织与性能的影响。结果表明,35SiMnMo截齿钢在880℃油淬200～350℃回火,具有超高强度和较高的冲击韧度,550～600℃回火,具有高强度和很高的冲击韧度,400℃回火出现回火脆性。880℃油淬350℃以下回火的组织为板条马氏体、贝氏体和残余奥氏体组织,超过350℃回火,碳化物逐渐析出,550～600℃回火组织为索氏体,具有较高的冲击值。880℃油淬200℃回火的冲击试样断裂机制为韧窝机制,400℃回火冲击试样断裂机制主要为准解理断裂。A new type 35SiMnMo pick steel has been developed.The effects of quenching and different temperature tempering on microstructure and properties of new type pick steel has been studied.The results show that 35SiMnMo pick steel has super high strength and better impact toughness in oil-cooling at 880 ℃ and tempering at 200~350 ℃ and in oil-cooling at 880 ℃ and tempering at 550~600 ℃ 35SiMnMo pick steel has better strength and best impact toughness.It appears temper brittleness tempering at 400℃.The microstructure is lath martensite and a small amount of bainite and retained austenite in oil-cooling at 880 ℃and below tempering at 350℃ and temper temperature above 350 ℃ carbide was precipitated,tempering at 550~600 ℃ microstructure is tempered sorbite and it has highest impact toughness.The fracture mechanism of 35SiMnMo pick steel is dimple mechanism in oil-cooling at 880℃and tempering at 200 ℃ and quasi-cleavage crack mechanism tempering at 400 ℃.

关 键 词：截齿 35SiMnMo钢 淬火 回火 组织 性能 

分 类 号：TG142.24[一般工业技术—材料科学与工程]