基于硅酸亚铁缓冲层的Q355B钢氧化铁剥落控制  

Oxide Scale Peeling Flaking Control of Q355B Steel based on Ferrous Silicate Buffer

作　　者：王庆军[1] 宋玉玮 Wang Qingjun;Song Yuwei(Tianjin Rockcheck United Steel Group Co.,Ltd.,Tianjin 300352;School of Mechanical Engineering,Beijing University of Science and Technology,Beijing 100083)

机构地区：[1]天津荣程联合钢铁集团有限公司,天津300352 [2]北京科技大学机械工程学院,北京100083

出　　处：《冶金设备》2023年第2期1-5,15,共6页Metallurgical Equipment

摘　　要：为了探究硅元素化合物对Q355B氧化铁皮变形规律及其剥落特性的影响,本文通过氧化铁皮轴向压缩实验,模拟了Q355B高强钢氧化铁皮在精轧过程中的变形情况。通过氧化层微观结构及成分分析,发现Q355B钢氧化铁皮最内层生成了不规则锯齿条带状的硅酸亚铁化合物缓冲层。在变形过程中,氧化铁皮表现出塑性与脆性混合的变形特性,并且随着压下率增大,硅酸亚铁厚度呈现增加的趋势,且空洞和碎裂也随之增加,但仍不会引起氧化铁皮的大块碎裂。研究表明,添加适量硅元素有助于改善Q355B表面质量,可有效控制其氧化铁皮粉状剥落现象。In order to investigate the effect of elemental silicon compounds on the deformation pattern of iron oxide of Q355B steel and its flaking characteristics,this paper simulates the deformation of iron oxide of Q355B steel during the finishing rolling process through iron oxide axial compression experiments.Through the microstructure and composition analysis of the oxide layer,it was found that the innermost layer of the iron oxide skin of Q355B steel generated an irregular serrated strip-like buffer layer of ferrous silicate compound.During the deformation process,the iron oxide exhibited the deformation characteristics of mixed plasticity and brttleness.And with the increase of the depression rate,the thickness of ferrous silicate showed a tendency to increase.The voids and fragmentation also increased,but still did not cause large fragmentation of the iron oxide.The study shows that the addition of appropriate amount of elemental silicon helps to improve the surface quality of Q355B steel,and can effectively control the powdered iron oxide flaking of Q355B steel.

关 键 词：Q355B钢 氧化铁皮 硅酸亚铁 变形 

分 类 号：TG335.11[金属学及工艺—金属压力加工]