电工钢板带中间坯料孔洞缺陷成因分析  

Analysis on Causes of Cavity Defect for Electric Steels Intermediate Blank

作　　者：曾松盛[1] 彭明耀[1] 王仕华[1] 周峰[1] 王磊[1] 

机构地区：[1]湖南华菱涟源钢铁集团有限公司技术中心,湖南娄底417009

出　　处：《中国冶金》2012年第5期38-41,共4页China Metallurgy

摘　　要：采用微观组织分析法,分别从裂纹附近的氧化圆点层厚度和尺度大小、金相组织、脱硅层的厚度和硅钢高温力学性能等着手,对涟钢生产的W600热轧电工钢中间坯料孔洞缺陷的成因进行了一系列分析。结果表明,该类热轧电工钢中间坯料的孔洞缺陷是由于板坯堆放不当产生各种热应力作用,并使板坯表面产生微裂纹而且裂纹呈现交错分布,经后续加热工艺进一步氧化,经粗轧轧制而导致孔洞缺陷的发生。The causes of cavity defects on W600 hot-rolled intermediate blank were analyzed by metallographic analy sis from the band thickness and the size of the oxidized round spots, metallographic mierostrueture, the thickness of desilieation band near the crack and the high-temperature mechanical property of the electral steel. The results con- firm that the cavity defects of the intermediate bland of electral steel result from the microcrack which are rooted in all sorts of stress in the slab. The mierocrack is oxidized further by the heating process and enlarged further by the rough rolling process.

关 键 词：硅钢 孔洞缺陷 裂纹 氧化圆点 脱硅 

分 类 号：TG335.5[金属学及工艺—金属压力加工]