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

A technology of cold-rolled steel sheets and manufacturing methods, applied in the field of ultra-deep-drawn cold-rolled steel sheets, capable of solving problems such as insufficient reduction rate and substandard stamping performance of ultra-deep-drawn cold-rolled steel sheets, and achieving good stamping performance

Inactive Publication Date: 2016-06-01
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Application Information

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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 t

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

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Embodiment Construction

[0050] Below in conjunction with embodiment 1~6 and comparative example 1—disclosed in the Chinese patent publication number CN102884213A, comparative example 2—disclosed in the Chinese patent publication number CN101135025A, the present invention is further described, as shown in table 1~table 4 .

[0051] Table 1 Chemical composition of the present invention (% by weight), the balance is Fe and unavoidable impurities.

[0052]

[0053] According to the requirements of the material composition design of the present invention, pre-desulfurization of molten iron is adopted, combined blowing at the top and bottom of the converter, Ar blowing at the bottom of the Ar blowing station ensures stirring, and RH furnace vacuum circulation degassing treatment ensures that the pure degassing time of RH is more than 10 minutes, and the whole process is blown. Ar protection casting, cutting into length continuous casting slabs after casting.

[0054] After the continuous casting slab i...

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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...

Claims

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Application Information

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IPC IPC(8): C22C38/14C21D8/04
Inventor 金澜裴新华穆海玲
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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