一种低碳多元微合金化结构钢的应用  

Application of a low-carbon micro-alloyed structural steel

作　　者：王观礼 张亚昌 伍玉娇[2] 蒋世华 张超[3] 梁柔 童庆安 

机构地区：[1]贵州高峰石油机械股份有限公司,贵州贵阳550081 [2]贵州理工学院,贵州贵阳550003 [3]贵州大学,贵州贵阳550025

出　　处：《贵州科学》2016年第6期69-75,共7页Guizhou Science

基　　金：贵州省工业攻关项目;合同号黔科合(2014)3034

摘　　要：石油机械重要零件用合金结构钢具有尺寸大、受力环境恶劣、受力形式复杂多样,要求大截面、厚壁零件采用材料具有较高淬透性并兼有优良的热处理工艺性能,以获得高而均匀的综合机械性能,提高其疲劳寿命,减少井下事故带来的巨大损失。利用低碳马氏体的特点以及多元微合金化提高淬透性,利用强韧化机理研发设计并成功生产应用的—相对于40Cr Mn Mo和4145H具有较高淬透性,一种低碳多元微合金化结构钢(高峰2号钢),其明显优势在于水淬不裂并具有更高的淬透性。The alloyed structural steel used in important parts of petroleum machinery is large in size,works in harsh environment and under various farces,which requires the material to have high hardenability and good heat treatment performance,so that the fatigue life of the parts can be prolonged and downhole accidents can be avoided. In this study,we took advantage of the characteristics of low-carbon martensite and micro-alloying to improve the hardenability of the material,and developed 40 Cr Mn Mo and 4145 H with relatively higher hardenability,which was a type of low-carbon micro-alloyed structural steel（ Gaofeng No. 2 Steel）. The new material has the advantages of not cracking when water quenching,and higher hardenability.

关 键 词：微合金化合金结构钢 大型零件 淬透性 淬裂倾向 

分 类 号：TG141[一般工业技术—材料科学与工程]