How to solve the problem of internal cracks in weathering steel?

Measures to resolve internal cracks in weathering steel:

(1) Strictly control the overheating of the tundish according to the requirements of weathering steel, reduce the formation of small shrinkage holes inside the weathering steel bridge casting billet or reduce the development of columnar crystals.

(2) Strictly follow the standard to reduce the speed of the tundish and carry out the tail cutting operation according to the standard to ensure the internal quality of the weathering steel tailstock.

(3) To replace the mold, the foot roller and the arc section should be inspected for the arc, and the weathering steel mold and the foot roller must be inspected from time to time.

(4) The weathering steel should be carefully inspected for the conditions of the secondary cold water and roller table after each pouring time. If the requirements are not met, no production is allowed.

(5) The main controller of weathering steel continuous casting must keep abreast of the current fluctuation of electromagnetic stirring. If the current fluctuation of electromagnetic stirring is greater than ±10A, record the current number, start and end time, and the electromagnetic stirring cannot be turned on or the current is lower than 400A. Cut waste to standard length.

(6) If the polarization of the crystallizer is found before the machine, notify the maintenance personnel to measure the polarization amplitude of the crystallizer and adjust it in time.

(7) Constant drawing speed pouring.