冷却方式对稀土微合金高强度钢组织的影响  

Effect of cooling method on microstructure of RE microalloyed high strength steel

作　　者：张玲郁 任慧平 金自力[1] 康学良[1,2] 王硕[1,2] 李兵磊[1,2] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010

出　　处：《金属热处理》2016年第11期105-108,共4页Heat Treatment of Metals

基　　金：内蒙古自治区科技计划项目(414060901)

摘　　要：采用Gleeble-1500D热模拟试验机测定了试验钢的动态连续冷却转变曲线,结合国内某厂热连轧带钢的具体轧制条件,制定了多道次轧制工艺,研究了冷却方式对稀土微合金高强度钢组织的影响。结果表明：试验钢的室温组织为铁素体＋贝氏体双相组织,冷却速度在5-25℃/s范围内试验钢均可得到铁素体,铁素体含量约为30%,其平均尺寸约为15μm左右;试验钢选择在铁素体区冷却,冷却速度为10℃/s左右,可以得到细小均匀的铁素体＋贝氏体双相组织,其中铁素体含量约为29%,平均尺寸为13μm。According to the CCT curves of the RE microalloyed high strength steel measured by Gleeble-1500 thermal simulater as well as the specific rolling condition of continuous hot rolling strip in a domestic steel plant,multi-pass rolling process was developed to research the effect of cooling method on microstructure of RE micralloyed high strength seel. The results show that when the cooling rate is in the range of 5-25 ℃ / s,the experimental steel obtains ferrite-bainite dual phase structure with 30% ferrite and its average size about 15 μm. When the cooling rate is 10 ℃ / s,the experimental steel can obtain uniformly fine dual phase structure,in which the ferrite is about 29% and its average size is about 13 μm.

关 键 词：冷却速度 稀土低合金高强度钢 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]