冷間壓延用 作業 롤의 Spalling 發生原因에 관한 硏究 = A Study on the Spalling Causes of Work Roll for Cold Rolling

다국어 초록 (Multilingual Abstract)

A study on the spalling causes of work roll for cold rolling was performed in the cold rolling mill. Performance of work roll is dependent to a great extent on spalling so that both roll manufacturers and users show great interest in spalling. So this paper shows that spalling phenomena were investigated and causes determined because of more than 85％ of spalling has its origin on the roll surface. As being well known, spalling mostly occurred due to developing fatigue fracture originated a crack on a roll. But such spalling can be prevented by proper roll maintenance. The spalling accidents have sharply decreased since 1981 because of the use of ultrasonic test to detect cracks on a roll.