The defects in the coldrollingroll detected by ultrasonic flaw detector are mainly the cracking defects, the non-metallic inclusions plays an important role for producing the cracking defects.
冷轧辊坯超声波探伤超标的主要原因是裂纹性缺陷,非金属夹杂物对裂纹性缺陷的产生起到了重要的作用。
2
So, it is very important to solve this problem of providing raw material (large-specification roll of steel plates) forcold-rolling mill.
因此,如何解决攀钢冷轧板厂用原料(大直径热轧板卷)的铁路运输问题就成了当务之急。
3
The principal problems with respect to roll working life are cracking at the surface of rollfor hot-rolling and that effective zone of quench-hardening of rollforcold-rolling is too narrow.