终轧温度和晶粒度对非调质钢JGF45V冲击功的影响  

Effect of Finishing Rolling Temperature and Grain Size on Impact Energy of Non-Quenched-Tempered JGF45V Steel

作　　者：韩怀宾 宋建锋 王清波 白瑞娟[3] 王维 虞学庆 Han Huaibin;Song Jianfeng;Wang Qingbo;Bai Ruijuan;Wang Wei;Yu Xueqing(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819;Henan Special Steel Advance Materials Research Institute Co Ltd,Jiyuan 459000;Henan Jiyuan Iron&Steel(Group)Co Ltd,Jiyuan 459000)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819 [2]河南省特殊钢材料研究院有限公司,济源459000 [3]河南济源钢铁(集团)有限公司,济源459000

出　　处：《特殊钢》2021年第3期67-70,共4页Special Steel

摘　　要：对非调质钢JGF45V终轧1000℃热轧态和860℃正火态冲击功试样进行金相分析和扫描电镜分析,得出晶粒度是影响非调质钢JGF45V室温冲击功的重要参数。通过终轧温度由1000℃降低至900~930℃,冷却速度为0.3℃/s的工艺试验,晶粒度级别由5提高到7,室温U型冲击功由32 J提高到≥55 J。The impact energy samples of non-quenched-tempered steel JGF45 V hot-rolled state by finishing rolling at1000℃and normalized state by normalizing at 860℃are analyzed by metallography and scanning electron microscope.It is obtained that grain size is an important parameter affecting room temperature impact energy of non-quenched-tempered JGF45 V steel.Through process test of decreasing the finishing rolling temperature from 1000℃to 900~930℃with the cooling rate being 0.3℃/s,the grain size rating of steel increases from 5 to 7,and the room U-shaped impact energy increases from 32 J to≥55 J.

关 键 词：非调质钢JGF45V 冲击功 晶粒度 终轧温度 冷速 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG335[金属学及工艺—金属材料]