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.
出处
《特殊钢》
北大核心
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
