420 MPa级冷轧低合金高强钢研发及组织性能研究  

RESEARCH AND DEVELOPMENT OF 420 MPa COLD ROLLED LOW ALLOY HIGH STRENGTH STEEL AND STUDY ON ITS MICROSTRUCTURE AND PROPERTIES

作　　者：蒋才灵 董苑华 叶姜 余轶峰 Jiang Cailing;Dong Yuanhua;Ye Jiang;Yu Yifeng(Guangxi Liuzhou Iron and Steel Group Co.,Ltd.Liuzhou 545002,China)

机构地区：[1]广西柳州钢铁集团有限公司,柳州545002

出　　处：《冶金信息导刊》2025年第2期18-21,共4页Metallurgical Information Review

基　　金：广西创新驱动发展专项资金资助项目“先进汽车用冷轧及热镀锌高强钢的开发及应用关键技术研究”(桂科AA22068079)。

摘　　要：冷轧低合金高强钢是最常见的结构用钢之一,细晶强化和沉淀强化是低合金高强钢的主要强化手段,对提高强度有重要作用。采用试验室热处理的方式制备冷轧低合金高强钢,通过对成分、制备工艺、显微组织特征、力学性能等综合分析,得到基于罩式退火工艺的420 MPa级冷轧高强钢的强韧化机理及控制方法,并优化冷轧低合金高强钢的生产工艺,以满足客户要求。Cold rolled low-alloy high-strength steel is one of the most common structural steels,and fine grain strengthening and precipitation strengthening are the main strengthening methods for low-alloy high-strength steel,which play an important role in improving strength.This article uses laboratory heat treatment to prepare cold-rolled low-alloy high-strength steel.Through comprehensive analysis of composition,preparation process,microstructure characteristics,mechanical properties,etc.,the strengthening and toughening mechanism and control method of 420 MPa grade cold-rolled high-strength steel based on hood annealing process are obtained,and the production process of coldrolled low-alloy high-strength steel is optimized to meet customer requirements.

关 键 词：冷轧低合金高强钢 退火工艺 强化机理 力学性能 微观组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]