石油机械用新型NJ110钢的热处理工艺  

Heat Treatment Process of New-type NJ110 Steel for Petro-Machinery

作　　者：尹永晶[1] 赵旭平[1] 张勇 胡志忠[3] 

机构地区：[1]石油大学机电学院,北京102249 [2]南阳二机石油装备(集团)有限公司,河南南阳473006 [3]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《金属热处理》2007年第9期36-38,共3页Heat Treatment of Metals

基　　金：河南省杰出青年科学基金项目(0412002700)

摘　　要：对石油机械用NJ110钢进行了4组热处理工艺试验,测试了常规拉伸性能和低温冲击韧性,并对冲击断口的形貌进行观察和显微组织分析。结果表明,NJ110钢采用930℃正火+920℃淬火油冷+200℃回火的工艺热处理后的组织中铁素体含量最少,断口呈准解理,屈服强度和低温冲击韧性皆满足使用要求。Four kinds of heat treatment process were preformed for new-type NJ110 steel for petro-machinery. Conventional tensile strength and low temperature impact toughness were tested, and the appearance and microstructure of the impact fracture were analyzed. The results show that the steel normalized at 930℃ ,then oil quenched at 920 ℃ and tempered at 200℃ has the least ferrite in microstructure and quasi-cleavage fractography, and both of its eligible yield strength and low temperature impact toughness meet the employ requirements.

关 键 词：NJ110钢 热处理工艺 低温冲击韧性 

分 类 号：TG162.7[金属学及工艺—热处理]