高强度结构钢直接淬火回火工艺试验研究  

Study of Direct Quenching and Tempering Process for High Strength Steel Plate

作　　者：胡淑娥[1] 孙卫华[1] 冯勇[1] 周兰聚[1] 李梅广[1] 

机构地区：[1]济南钢铁股份有限公司技术中心,山东济南250101

出　　处：《山东冶金》2010年第3期45-47,共3页Shandong Metallurgy

基　　金：国家科技支撑计划重点资助项目;项目编号2007BAE51B07

摘　　要：通过合理的成分设计,采用直接淬火回火(DQ-T)工艺,在实验室成功试制了1000MPa级高强钢,并结合金相、透射电子显微技术,研究了不同回火温度对试验钢组织、析出与性能的影响规律。结果表明,随回火温度的升高,强度呈现起伏现象;在400～450℃区间出现回火脆性。直接淬火回火工艺获得显微结构为回火索氏体与回火贝氏体组织,各项性能指标均满足1000MPa级高强钢的要求。Through proper chemical composition design,adopting DQ-T technology,the high strength steels of grade 1000 MPa were successfully trial-manufactured in laboratory.The relationship among different temper temperature,microstructure,precipitation and mechanical properties was studied by metallographic analysis and TEM technology.The results indicated that the strength of the steel fluctuated along with the increase of tempering temperature.When the steel tempered at 400～450℃,the temper brittleness appeared obviously.The microstructure was composed of tempered sorbite and bainite,every property of the test steel all accorded with the grade 1000 MPa standard.

关 键 词：高强度结构钢 直接淬火回火 回火温度 显微结构 析出 

分 类 号：TG142.41[一般工业技术—材料科学与工程]