the ear has burrs, is it the billet problem or the rolling mill problem, will it be caused by the blowhole of the billet?
Billet sent from the steelmaking plant, first into the furnace, then after rolling mill rolling
The rolling process of rolling mill of hot rolling and cold rolling process for the two step: a hot rolling process: from out of billet steel plant is only semi-finished products, to the rolling mill for rolling, in order to become a qualified product.
Do not worry, you can go to the hospital to check
