Method for rolling heavy-gauge silicon steel raw material to form standard-thickness cold rolling product

• Main Author: HAN YULONG
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2017
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention discloses a method for rolling a heavy-gauge silicon steel raw material to form a standard-thickness cold rolling product. The method comprises the steps of acid pickling and rolling a hot rolling silicon steel coiled plate with the thickness being 2.75mm to 6.0mm through a pickling-rolling combination unit so as to obtain a cold hard coiled plate with the thickness being 1.8mm to 2.75mm, and then carrying out cover annealing treatment in a bell-type furnace; changing the inner diameter of the silicon steel coiled plate subjected to cover annealing treatment from 610mm into 730 to 762mm in a recoiling and roll-dividing unit; and secondarily rolling the diameter-expanded silicon steel coiled plate through the pickling-rolling unit so as to obtain a silicon steel cold hard coil with the thickness being 0.5mm, and then carrying out continuous annealing treatment. According to the method, the work efficiency is improved, the cost is saved, the inner diameter of the steel coil is expanded to meet the