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对发生在节镍型不锈钢冷轧2B表面短条状缺陷进行显微结构、能谱分析,并结合其冶炼—热轧—冷轧一贯制生产工艺,得出缺陷的实质是热轧过程中咬入的氧化铁皮经过冷轧后的表现形式。通过对不同加热温度的统计对比、材料的热塑性分析以及热轧板氧化铁皮结构的分析,得出加热温度过高会影响材料的热塑性,导致加热和轧制过程出现微裂纹,热轧完成后演变为咬入式氧化铁皮缺陷。控制抽钢温度在1215℃以下可以有效降低缺陷发生率。
The microstructure and energy spectrum analysis of the short strip defects occurred on the surface of nodular nickel-free cold-rolled 2B were studied. The microstructure and energy spectrum analysis were combined with the production process of smelting-hot rolling-cold rolling. Into the oxide scale after cold-rolled form. Through the statistical comparison of different heating temperatures, the thermoplastic analysis of the material and the analysis of the structure of the hot-rolled steel oxide scale, it is concluded that the heating temperature is too high and will affect the thermoplasticity of the material, resulting in microcracks during the heating and rolling process. For bite-type oxide scale defects. Control of pumping temperature below 1215 ℃ can effectively reduce the incidence of defects.