Cold-rolled bifocal plate as well as manufacturing method and application thereof

Abstract

The invention belongs to the technical field of ferrous metallurgy and particularly relates to a manufacturing method of a cold-rolled bifocal plate. The manufacturing method is characterized by comprising the following steps: sequentially carrying out hot continuous rolling, acid pickling cold continuous rolling, batch annealing, levelling and finishing on a plate slab to obtain the cold-rolled bifocal plate; wherein the relative reduction rate of the acid pickling cold continuous rolling procedure is controlled to be 50% or above; the roughness of a last rack working roll in the acid pickling cold continuous rolling procedure is 1.5-2.0 microns to realize that the roughness of a chill roll obtained when the plate slab is sequentially subjected to the hot continuous rolling and acid pickling cold continuous rolling is 0.3-0.6 micron; and the roughness of a temper mill working roll is controlled to be 0.2-0.6 micron during the levelling procedure to realize that the roughness of the cold-rolled bifocal plate is 0.15-0.30 micron. Through copying and transferring of the roughness of the working roll, the purpose of producing the high-quality cold-rolled bifocal plate with the roughness being 0.15-0.30 micron is realized.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a cold-rolled double-bright plate and its manufacturing method and application. Background technique [0002] Cold-rolled double-light boards have high requirements on surface roughness, and generally require bright surfaces and small roughness; if the surface roughness of the incoming materials for manufacturing cold-rolled double-light boards is high, the roughness of the products often does not meet the requirements; currently The surface of incoming materials is generally smooth, but quality problems such as slippage are prone to occur during continuous annealing furnace production, so that the surface quality of cold-rolled double-light sheets cannot reach the production effect. [0003] Therefore, it is necessary to develop a method for manufacturing cold-rolled double-bright sheets that not only satisfies the low roughness of cold-rolled double-...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cold-rolled double-light sheet and its manufacturing method and application, so as to solve the problem that the cold-rolled double-light sheet in the prior art cannot meet low roughness and high quality at the same time

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