高温钢坯的除磷技术研究  

Study on Descaling Technology of High Temperature Steel

作　　者：傅旻[1] 刘鹏 王锴 FU Min;LIU Peng;WANG Kai(College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 360222,China)

机构地区：[1]天津科技大学机械工程学院,天津360222

出　　处：《热加工工艺》2020年第18期45-50,55,共7页Hot Working Technology

摘　　要：在在线钢坯标识设备的设计中,可采用喷涂方式进行标识,将喷涂材料利用气体吹到钢坯表面形成字样。而钢坯从高温冷却至常温的过程中,钢坯表面氧化皮易开裂剥落,严重影响标识字符的完整度和清晰度。为保证标识字符的完整和清晰,需要去除标识区域钢坯表面氧化皮。对高温在线标识的除磷机理进行研究,高温下钢坯氧化皮塑性增强,增加了对钢坯表面的附着力而不易去除。采用旋转除磷刀冲击钢坯表面方式去除氧化皮。氧化皮与钢坯界面受外力冲击开裂,裂纹扩展,氧化皮自身受内应力破坏,晶体位错滑移导致结构断裂、氧化皮脱落。通过物理方程分析得到影响除磷效果的主要因素为降磷到刀片材料属性、速度、角度。利用UG软件建立三维模型,使用Abaqus有限元软件进行除磷过程的模拟,可得到材料、速度、角度与应力的变化曲线,由此可设计最优的除磷机构。In the design of on-line billet marking equipment, spraying method can be used to mark, and spraying material can be blown to the surface of the steel by gas to form words. In the process of steel cooling from high temperature to room temperature, the oxide scale on the surface of steel is easy to crack and peel off, which seriously affects the integrity and clarity of the marking characters. In order to ensure the integrity and clarity of the marking characters, it is necessary to remove the oxide scale on the surface of steel in the marking area. The mechanism of phosphorus removal by on-line marking at high temperature was studied. At high temperature, the plasticity of oxide skin of steel is enhanced, which increases the adhesion to the surface of billet and is not easy to remove. The oxide scale is removed by the impact of rotary dephosphorization knife on the surface of steel. The interface between oxide scale and steel is cracked by the external impact, cracks development, and the oxide scale itself is destroyed by internal stress, the crystal dislocation slip leads to structural fracture and oxide scale shedding. The main factors affecting phosphorus removal effect are descaling blade material properties, velocity and angle through physical equation analysis. A three-dimensional model was established by UG, and the process of phosphorus removal was simulated by Abaqus finite element software. The change curves of material, velocity, angle with stress were obtained.Therefore, the optimal descaling mechanism could be designed.

关 键 词：开裂剥落 高温 冲击 界面 

分 类 号：TG17[金属学及工艺—金属表面处理]