Thick-gauge ultra-deep drawing cold rolled steel plate and manufacturing method thereof

Abstract

The present invention relates to a thick-gauge ultra-deep drawing cold rolled steel plate and a manufacturing method thereof. In the prior art, when the cold rolling reduction rate is insufficient, the stamping performance of the ultra-deep drawing cold rolled steel plate with the thickness of 1.2-2.0 mm and produced by using the bell furnace annealing process does not meet the standard. A purpose of the present invention is to solve the technical problem in the prior art. The chemical components of the thick-gauge ultra-deep drawing cold rolled steel plate comprise, by weight, less than or equal to 0.003% of C, less than or equal to 0.03% of Si, 0.1-1.0% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, less than or equal to 0.005% of N, less than or equal to 0.05% of Alt, and the balance of Fe and unavoidable impurities, wherein the content of Ti% satisfies the equation that (Ti%)-3.4*(N%)-1.5*(S%)-4*(C%) is (0.004-0.03). According to the present invention, the thick-gauge ultra-deep drawing cold rolled steel plate is mainly used for outer covers, shells and other members of mechanical and electrical products.

Description

technical field [0001] The invention relates to an ultra-deep-drawn cold-rolled steel plate, in particular to a thick gauge ultra-deep-drawn cold-rolled steel plate and a manufacturing method thereof. Background technique [0002] The thick gauge cold-rolled sheet with a thickness of 1.2-2.0mm is mainly used in the outer cover and shell of electromechanical products. As a structural part, due to its good rigidity, it can be used for instruments and precision machinery operating under certain working conditions. To the protective effect, and to a certain extent to achieve the effect of shock absorption and noise reduction. With the miniaturization and diversification of applications of mechanical devices, the shapes of housings and casings are becoming more and more complex, and the requirements for materials in the stamping process are also increasing. [0003] Ultra-low carbon interstitial atom-free steel (IF steel), because it contains carbonitride-forming elements, can g...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a thick gauge ultra-deep drawn cold-rolled steel plate and its manufacturing method, to solve the problem of using the bell furnace annealing process to produce ultra-deep drawn cold-rolled steel plates with a thickness of 1.2-2.0mm when the existing cold-rolled reduction rate is insufficient The stamping performance is not up to standard technical problems

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