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作者用实验室的3机座串联式的轧机再现了在高 Si 热轧带钢上经常所见的红鳞缺陷,并且就热轧除鳞条件对带钢表面颜色和氧化铁皮的构造之影响作了分析。无论钢的含 Si 量如何,在轧制前氧化铁皮厚度超过20μm,且轧制温度在900℃以下时,热轧带钢表面总是红色的。粉状的氧化铁皮在冷却过程中因氧化而生 Fe_2O_3亦即红鳞。在轧制低 Si 钢板坯之前在热处理过程中生成的厚氧化铁皮,则可用高压水除鳞法彻底清除,然而高 Si 钢中的氧化铁皮却无法予以彻底清除。这种残留下来的氧化铁皮在轧制并冷却后就产生红鳞缺陷。文章还探讨了应用本研究结果生产无红鳞缺陷带钢的可能性。
The authors reproduce the red scale defects commonly found on high-Si hot-rolled steel strip using a 3-stand laboratory tandem mill and the effect of hot rolling descaling on the strip surface color and scale structure Analysis. Regardless of the Si content of the steel, the surface of the hot-rolled steel strip is always red when the scale thickness exceeds 20 μm before rolling and the rolling temperature is below 900 ° C. Powdery iron oxide scale in the cooling process due to oxidation of Fe_2O_3 that red scales. The thick scale formed during the heat treatment prior to rolling the low Si steel slab can be thoroughly removed by high pressure water descaling, however, the scale in high Si steel can not be completely removed. This remnants of the scale is rolled and cooled to produce red scale defects. The article also explored the possibility of producing strip-free flake strips using the results of this study.