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答:这种缺陷在钢板表面呈明显的点状、块状和长条状的分布。其颜色一般为红棕色,淡黄或灰白色。表面夹杂具有一定的深度。产生这类缺陷的原因除原料本身带有非金属夹杂物外,还与加热有关。如加热时,炉顶或炉墙的耐火材料落在原料的表面,经轧制后压入表面,就产生表面夹杂。处理这类缺陷时,应根据面积的大小和深度,采取不同的方法。对于小块或较浅的表面夹杂,一般用修磨的方法清理;对于大块或较深的,则采用切除的方法清理。
A: This defect in the steel surface was obvious punctate, massive and long strip distribution. Its color is generally reddish brown, pale yellow or gray. Surface inclusions have a certain depth. The reasons for such defects in addition to the raw material itself with non-metallic inclusions, but also with the heating. If heated, the top of the furnace or furnace refractory material fell on the surface of the raw material, after rolling into the surface, resulting in surface inclusions. When dealing with such defects, take a different approach depending on the size and depth of the area. For small or shallow surface inclusions, the general method of grinding clean; For large or dark, then use the method of removal clean.