冷却速度对含Ti非调质钢中晶内铁素体形成的影响  

Effect of cooling rate on formation of intragranular ferrite in Ti-containing non-quenched and tempered steel

作　　者：杨占兵[1] 王森[1] 王福明[1] 宋波[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《金属热处理》2008年第6期24-27,共4页Heat Treatment of Metals

基　　金：国家自然基金资助项目(No50574010);教育部博士点基金(No20030008010)

摘　　要：观察了不同冷速下获得的含Ti非调质钢的显微组织,并绘制了静态连续冷却转变曲线（CCT曲线）。结果表明,在0·5-2·5℃/s的冷速范围内,会有晶内铁素体析出,其中在2℃/s冷却时可以获得大量针状铁素体。空冷条件下获得细小无序分布的晶内铁素体,明显提高试验用含Ti非调质钢的韧性。：The microstructure of Ti-containing non-quenched and tempered steel obtained at different cooling rates was studied, and the continuous cooling transformation（CCT） diagram of the tested steel was also obtained. The results show that, at the cooling rate range of 0.5 ℃/s - 2.5℃/s, multiple intragranular ferrite forms, while at the rate of 2 ℃/s, the microstructure is mainly acicular ferrite. And by air cooled ,the tested Ti-containing non-quenched and tempered steel obtains fine and chaos intragranular ferrite,which improves the toughness greatly.

关 键 词：非调质钢 晶内铁素体 冷却速度 

分 类 号：TG142.13[一般工业技术—材料科学与工程]