晶内铁素体型高强韧性微合金非调质钢的进展  

Development of Microalloyed Intragranular Ferrite Steel With High Strength and Toughness

作　　者：陈思联[1] 林军[2] 戴观文[3] 

机构地区：[1]北京科技大学,北京100083 [2]宝钢阿赛洛激光拼焊有限公司,上海201805 [3]石家庄钢铁有限责任公司,石家庄050031

出　　处：《特殊钢》2005年第3期35-38,共4页Special Steel

基　　金："十五"国家科技攻关计划项目

摘　　要：晶内铁素体型微合金非调质钢成分一般为(%):0.2～0.4C,0.2～0.8Si,1.0～1.7Mn,0.05～0.15V,采用再结晶锻造或轧制、控制相变区间冷却速率以促进形成细小弥散的晶内铁素体组织是提高铁素体珠光体型微合金非调质钢强韧性的重要手段。选择合适的脱氧工艺,获得一定组成的细小、弥散的氧化物,使之成为MnS、VN和V4 C3等的析出核心,利于晶内铁素体析出的氧化物冶金是近来提高该钢强韧性的重要进展。介绍了国内外晶内铁素体型微合金非调质钢的化学成分和生产工艺,并分析了晶内铁素体形成机理。The general chemical compositions of microalloyed intragranular ferrite steels are 0.2～0.4C, 0.2～0.8Si, 1.0～1.7Mn, 0.05～0.15V. It is a main measure to increase the strength and toughness of ferrite- pearlite microalloyed steel using recrystallized forging and rolling to control cooling rate in phase transformation range in order to promote formation of fine dispersed intragranular ferrite structure. Recently an important advance to increase strength and toughness of this steel is to select suitable deoxidizing process, get fine, dispersed oxides with definite ingredient which become precipitated nucleus of MnS, VN and V 4C 3. The chemical compositions and production of microalloyed intragranular ferrite steels at home and abroad are presented and the formation mechanism of intragranular ferrite is analyzed in this paper.

关 键 词：微合金非调质钢 体型 高强韧性 晶内铁素体 氧化物冶金 冷却速率 脱氧工艺 生产工艺 化学成分 形成机理 再结晶 体组织 MNS 国内外 弥散 析出 轧制 锻造 相变 

分 类 号：TG142[一般工业技术—材料科学与工程]