Cold-rolling annealing method of cold-rolled strip steel

Abstract

The invention discloses a cold-rolling annealing method of cold-rolled strip steel. The method` comprises the following steps that S1, strip steel is selected, the strip steel Is machined until a thickness is 2.0 mm-3.5 mm, then the strip steel is placed on a conveying mechanism, the conveying mechanism is enabled to face an inlet of a preheating furnace, and the strip steel is fed into a preheating furnace for preheating and treatment; S2, the strip steel is heated, specifically, the preheated strip steel is conveyed into a heating furnace to be heated, and a temperature rising speed of a temperature is changed according to the requirement of heating of the strip steel; S3, strip steel heat preservation is conducted, specifically, the heated strip steel enters a balancing furnace to be subjected to heat preservation, and the heat preservation time is 12 h-15 h; and S4, the strip steel is cooled, the strip steel is taken out of the furnace after heat preservation to be subjected to hotline pickling, continuous pickling is performed by adopting a special pickling line, and meanwhile, electrolysis is performed. The tail sticking problem of the cold-rolled strip steel is thoroughly solved, and a first-grade product rate of a finished product is greatly increased. After tail sticking is solved and the mechanical property of the finished product is improved, the machining cost is controlled, and the application field of the product is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled strip steel production, and in particular relates to a cold-rolled annealing method for cold-rolled strip steel. Background technique [0002] Steel is a narrow and long steel plate produced by various steel rolling enterprises to meet the needs of industrial production of various metal or mechanical products in different industrial sectors. Strip steel, also known as steel strip, is within 1300mm in width, and the length is slightly different according to the size of each roll. [0003] The uneven deformation and high-temperature annealing in the cold rolling process provide energy for the particle diffusion inside the steel plate. Generally, the particle diffusion is only carried out in the plate, but due to the close contact between the strip steel layer and the layer, with the annealing process, the particle diffusion Continuously, the grains on the surface of the steel plate grow, and th...

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Problems solved by technology

[0003] The uneven deformation and high-temperature annealing in the cold rolling process provide energy for the particle diffusion inside the steel plate. Generally, the particle diffusion is only carried out in the plate, but due to the close contact between the strip steel layer and the layer, with the annealing process, the particle diffusion Continuously, the grains on the surface of the steel plate grow, and the grain boundaries overlap to gradually form symbiotic grains between the strip steel layers, and finally form the same metal entity between the strip steel layers and layers, which causes the bonding between the steel plates

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