Cold-rolled steel sheet for lampshade and production method of cold-rolled steel sheet

A technology of cold-rolled steel sheet and production method, which is applied in metal rolling, metal rolling, workpiece cooling device, etc., can solve the problems of unstable material performance and high manufacturing cost, and can solve the problem of uneven performance, low manufacturing cost, and satisfying Effects of performance requirements

Inactive Publication Date: 2021-05-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a cold-rolled steel plate for lampshades and its production method, which mainly solves the technical problems of high manufacturing cost and unstable material properties of the existing cold-rolled steel plates for lampshades

Method used

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  • Cold-rolled steel sheet for lampshade and production method of cold-rolled steel sheet
  • Cold-rolled steel sheet for lampshade and production method of cold-rolled steel sheet
  • Cold-rolled steel sheet for lampshade and production method of cold-rolled steel sheet

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with specific examples 1-5, as shown in Table 1-4, Table 1 is the chemical composition (by weight percentage) of the steel of the embodiment of the present invention, and the balance is Fe and unavoidable impurities.

[0044] Table 1 Chemical composition of the steel of the embodiment of the present invention, unit: weight percent.

[0045]

[0046]

[0047] The molten steel that meets the basic requirements of the chemical composition is obtained through converter smelting. After the molten steel is desulfurized in the LF ladle refining furnace and the alloy composition is fine-tuned, it is poured by the continuous casting machine to obtain the continuous casting slab; the thickness of the slab is 210-230mm, and the width is 900-1400mm , the length is 8500-11000mm.

[0048] The cut-to-length slab produced by steelmaking is directly sent to the heating furnace for reheating, and then sent to the ...

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Abstract

The invention discloses a cold-rolled steel sheet for a lampshade and a production method of the cold-rolled steel sheet, and mainly aims to solve the technical problems of high manufacturing cost and unstable material performance of existing cold-rolled steel sheets for lampshades. The cold-rolled steel sheet for the lampshade comprises, in percentage by weight, the chemical components of 0.026-0.049% of C, <=0.034% of Si, 0.15-0.25% of Mn, <=0.020% of P, <=0.0154% of S, <=0.0035% of N, 0.025-0.05% of Al, 0.001-0.002% of B and the balance of Fe and inevitable impurity elements. According to the cold-rolled steel sheet with the thickness of 0.25-0.40mm, the yield strength RP0.2 is 220-260MPa, the tensile strength Rm is 330-380MPa, and the percentage elongation after fracture A50mm is 35-45%. The product is mainly suitable for cold-rolled steel sheets for lampshades.

Description

technical field [0001] The invention relates to a cold-rolled steel plate and a production method thereof, in particular to a cold-rolled steel plate for a lampshade and a production method thereof, and belongs to the technical field of iron-based alloys. Background technique [0002] The main function of the cold-rolled steel plate for the lampshade is to stamp the steel plate into the lampshade of the desk lamp. The key performance requirement is that the steel plate has uniform performance and good stamping performance. Steel for cold-rolled lamp shades requires steel plate yield strength R P0.2 220~260MPa, tensile strength R m 330~380MPa, elongation after breaking A 50mm 35-45%, and the surface roughness Ra of the steel plate is 0.50-0.80 μm. [0003] The key to the production process of cold-rolled steel sheets is to match the product composition with the hot-rolling process, cold-rolling process, and continuous annealing process to obtain the final product performan...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D6/00C21D8/02C21D9/00C22C38/02C22C38/04C22C38/06B21B1/22B21B37/74B21B45/02
CPCC21D1/26C21D8/0221C21D9/0081C21D6/005C21D6/008C22C38/02C22C38/04C22C38/002C22C38/001C22C38/06B21B1/22B21B45/0203B21B37/74C21D2211/005C21D2211/009B21B2001/225
Inventor 刘洪李雯王运起闫秉昊孙明军许姣姣
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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