A kind of production method of low-temperature annealing ultra-deep drawing cold-rolled steel plate and cold-rolled steel plate

Abstract

The invention discloses a production method of low-temperature annealed ultra-deep drawing cold-rolled steel plate, which comprises the following steps: controlling the components of the steel plate according to the weight percentage, and continuously casting each component into a continuous casting slab after smelting; heating the casting slab After reaching 1190°C-1220°C, rough rolling and finish rolling are carried out sequentially to obtain hot-rolled sheets with a thickness of 3-6mm; Coil rolling; hot-rolled coils are uncoiled, and then cold-rolled to obtain strip steel after cleaning; the strip steel is annealed in a continuous annealing furnace; the strip steel after continuous annealing is cooled to room temperature in a water bath, and skin-passed. By controlling the temperature in the production process, the good mechanical properties of the finished product can be achieved, and the steel plate with low yield strength and high elongation can be obtained. The invention also discloses the low-temperature annealed ultra-deep drawn cold-rolled steel plate produced by the production method.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and particularly relates to a production method of a low-temperature annealing ultra-deep drawing cold-rolled steel plate and a low-temperature annealing ultra-deep-drawing cold-rolled steel plate produced by the method. Background technique [0002] With the continuous development of the automotive industry, the market's requirements for home appliance boards continue to increase. On the premise of ensuring performance, the stamping performance is gradually improved. Good stamping properties require steel sheets with lower yield strength and higher elongation. In the prior art, methods such as deep decarburization and addition of alloying elements are usually used to meet the mechanical property requirements of the steel plate, but this undoubtedly increases the production cost of the steel plate. SUMMARY OF THE INVENTION [0003] In order to solve the existing technical problems, the p...

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Problems solved by technology

The existing technology usually adopts deep decarburization, adding alloy elements, etc. to meet the mechanical performance requirements of the steel plate, but this undoubtedly increases the production cost of the steel plate

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