Q235 H型钢轧后强冷工艺对组织和性能的影响  

Analysis of Mechanical Properties and Microstructure of Q235 H-beam Steel after Hot Rolling and Fast Cooling

作　　者：鲁怀敏[1] 汪开忠[2] 吴胜付[3] 黄贞益[3] 

机构地区：[1]沙洲职业工学院机电工程系,江苏苏州215600 [2]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [3]安徽工业大学材料学院,安徽马鞍山243000

出　　处：《钢铁钒钛》2011年第3期64-69,共6页Iron Steel Vanadium Titanium

基　　金：十一五国家科技支撑计划子项(2007DAE30B01)

摘　　要：轧后经强冷的Q235H型钢铁素体晶粒大小和机械性能与轧后奥氏体晶粒大小和温降速度密切相关。以马钢现有轧后强冷系统为试验设备,以现有常规轧制工艺为条件,在水压和水流密度不变的前提下,通过改变冷却段的长度,即改变强冷时间,得到Q235H型钢不同温降速度、晶粒大小和机械强度及分布,同时验证了Hall-Petch公式的正确性,为制定合理的冷却工艺提供了依据。Ferrite grain size and mechanical properties of Q235 H-beam steel after hot rolling and fast cooling were concerned with austenite grain size and cooling rate.Under experimental conditions of the Masteel＇s built cooling system and common rolling process and constant water pressure and flow density,different cooling rate,ferrite grain size,mechanical properties and its distribution of Q235 H-beam steel were obtained by changing fast cooling time.At the same time,the result proved the correctness of the Hall-Petch formula and provided the basis of set down resonable cooling process.

关 键 词：Q235 H型钢 快速冷却 铁素体晶粒 屈服强度 

分 类 号：TG335.4[金属学及工艺—金属压力加工]