“零保温”淬火对35CrMo钢低温韧性的影响  

Effect of “Zero Time Holding” Quenching on Low Temperature Toughness of 35CrMo Steel

作　　者：田玉知[1] 高万夫[1] 雷晓维[1] 

机构地区：[1]中国石油大学(北京)材料科学与工程系,北京102249

出　　处：《热加工工艺》2012年第18期170-172,176,共4页Hot Working Technology

基　　金：中石化项目"高寒地区石油装备与材料研究"(JW08001)

摘　　要：为提高35CrMo钢的低温韧性,采用常规热处理和"零保温"淬火工艺进行对比,通过对比金相组织、硬度、冲击功及断口的宏微观形貌,研究"零保温"淬火对钢低温韧性的影响。结果表明,"零保温"淬火可使35CrMo钢获得非常细小的板条马氏体,能有效改善其低温韧性;890℃"零保温"淬火可使材料获得组织均匀细小的索氏体,材料低温韧性明显提高。To improve the low temperature toughness of 35CrMo steel,speciments treated by the traditional heat treatment and ＂zero time holding＂ quenching technic were compared.The influences of ＂zero time holding＂ quenching on the low temperature toughness of the steel were studied by microstructure,hardness,impact power and section image.The results indicate that the steel can obtain lath martensite which is very thin,and this kind of metallurgical structure can improve the low temperature toughness of the steel remarkably.When the ＂zero time holding＂ quenching temperature is 890 ℃,and the tempering temperature is 500 ℃,the steel can obtain well-distributed and small sorbite,and the low temperature toughness increases obviously.

关 键 词：“零保温”淬火 35CRMO钢 低温韧性 冲击实验 

分 类 号：TG156.3[金属学及工艺—热处理]