Production process of laminated-rolled wide sheet

Abstract

The invention discloses a production process of a laminated-rolled wide sheet. The production process specifically comprises the following steps that (1) a blank is selected, the selected blank is bloomed to 70-75 mm, and then a bloomed sheet is subjected to flame cutting and sizing; (2) milling is carried out on the blank sheet subjected to primary sizing; (3) a groove is formed in the surface ofa lower blank, an isolating agent is sprayed in the groove, and the isolating agent is dried; (4) aligning and compounding are carried out on the dried lower blank and upper blank, and welding is carried out; (5) a blank boss is machined; (6) the blank sheet is placed in a stepping type heating furnace for heating; (7) descaling is carried out with high-pressure water; (8) broadening rolling is carried out by a 5000 mm rolling mill; (9) straightening is carried out; and (10) plasma cutting and sheet separating are carried out. According to the production process of the laminated-rolled wide sheet, limitation on a roll gap of a 5m rolling mill in producing wide sheets with the thickness of 6 mm or below by using the CVC technology can be solved, and meanwhile, the problems that a wide sheet with the thickness of 8 mm or below is high in curvature and large in plate projection degree are solved.

Description

technical field [0001] The invention relates to a production process of stack rolling wide thin plates. Background technique [0002] With the development of the steel market, downstream customers have increased demand for thin plates below 10mm. In order to better adapt to the situation of the steel industry, Nangang Wide and Heavy Plate Factory not only produces thick plates, but also develops wide and thin plates; at present, it has successfully developed 6mm wide thin plates, which exceeded the lower limit of the original product outline; but due to the 5m rolling mill CVC technology Due to the limitation of conventional blanks, it is not possible to use conventional blanks to produce thin plates with a width of less than 6mm. Using blank composite technology, composite blanks are produced for stacked rolling production. Through heating process, rolling schedule arrangement, plate crown control, temperature model optimization, pre-leveling and straightening The research...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the 5m rolling mill CVC technology limits the production of thin plates with a width of less than 6mm on the roll gap, and at the same time solves the problems of high curvature and large protrusion of thin plates with a width of less than 8mm, aiming at the shortcomings of the above existing technologies , providing a production process for stacked wide thin plates