吐丝温度对高硅焊丝钢氧化皮结构及剥离性的影响  

Effect of Laying Temperature on the Structure and Descaling Property of Oxide Scale on High Silicon Welding Wire Steel

作　　者：郭慧英 张亚运 王纳 张宇 GUO Huiying;ZHANG Yayun;WANG Na;ZHANG Yu(Institute of Research of Iron and Steel(IRIS),Shasteel,Zhangjiagang Jiangsu 215625,China)

机构地区：[1]江苏省(沙钢)钢铁研究院

出　　处：《上海金属》2019年第6期29-33,共5页Shanghai Metals

摘　　要：研究了吐丝温度对ER70S-6高硅焊丝钢盘条氧化皮结构的影响,并采用扭转试验评价了氧化皮的机械剥离性。结果表明:高硅焊丝钢盘条轧制后形成的氧化皮具有4层结构,从基体侧向外依次为Fe 2SiO 4、Fe 1-x O、Fe 3O 4和Fe 2O 3层;吐丝温度对氧化皮的总厚度及物相比例具有显著影响。当吐丝温度从840℃增加至920℃时,氧化皮总厚度从约7μm增加至13μm,中间层Fe 1-x O的厚度比例增加至50%;扭转试验时氧化皮剥离形态由粉末状逐渐转变为块状和长条状,氧化皮残留量逐渐减少,这表明提高吐丝温度可改善盘条表面氧化皮的机械剥离性。Effect of laying temperature on the structure of oxide scale on high silicon welding wire steel was studied and the mechanical descaling property of the oxide scale was evaluated by mechanical twisting test.The results showed that the oxide scale on high silicon welding wire rod surface contained four layers,namely Fe 2SiO 4,Fe 1-x O,Fe 3O 4 and Fe 2O 3 from the matrix side to the outside.The whole thickness and phase proportion of oxide scale were obviously affected by laying temperature.When the layer temperature increased from 840℃to 920℃,the whole thickness of oxide scale increased from 7μm to 13μm,and the thickness ratio of Fe 1-x O middle layer increased to 50%;during the twisting test,the descaling pattern of the oxide scale changed from powder to bulk and strip,and the residual oxide scale decreased gradually,which indicated that increasing the laying temperature can improve the mechanical descaling property of oxide scale.

关 键 词：氧化皮 焊丝钢 吐丝温度 机械剥离 

分 类 号：TG3[金属学及工艺—金属压力加工]