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CSP process low-carbon steel plate with good forming performance and manufacturing method thereof

A technology of formability and manufacturing method, applied in the field of low carbon steel plate with excellent formability in CSP process and its manufacturing field, can solve problems such as increasing production cost, and achieve the effects of improving production efficiency, excellent formability, and reducing the amount of acid solution

Inactive Publication Date: 2018-10-02
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For low-carbon steel with a carbon content of 0.045-0.065%, these methods are either not suitable or will increase production costs. At present, there is no technology related to reducing its strength and improving formability without increasing production costs.

Method used

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  • CSP process low-carbon steel plate with good forming performance and manufacturing method thereof
  • CSP process low-carbon steel plate with good forming performance and manufacturing method thereof
  • CSP process low-carbon steel plate with good forming performance and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A low-carbon steel plate with excellent formability in the CSP process, its chemical composition weight percentage content is shown in Table 1 below.

[0034] A method for manufacturing a low-carbon steel plate with excellent formability in a CSP process, the method is:

[0035] 1) Converter smelting first, then LF furnace refining, and then continuous casting;

[0036] 2) The billet enters the heating furnace for heating;

[0037] 3) Rolling, after high-pressure water descaling, enter the 7-stand finishing mill for rolling;

[0038] 4) After rolling, the steel plate is coiled after laminar flow cooling.

[0039] The thickness of the continuous casting slab is controlled to be 70 mm, and the heating temperature, final rolling temperature, laminar cooling rate and coiling temperature are controlled. The specific process parameters are shown in Table 2 below.

Embodiment 2-5

[0041] A low-carbon steel plate with excellent formability in the CSP process, its chemical composition weight percentage content is shown in Table 1 below.

[0042] A kind of manufacturing method of the low-carbon steel plate with good formability of CSP flow process, method is the same as embodiment 1, and specific process parameter is as follows table 2:

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Abstract

The invention provides a CSP process low-carbon steel plate with good forming performance and a manufacturing method thereof. The CSP process low-carbon steel plate with good forming performance comprises the chemical components of, by weight, 0.045-0.065% of C, 0.010-0.060% of Si, 0.08-0.30% of Mn, no greater than 0.015% of P, no greater than 0.010% of S, 0.020-0.060% of Al, and the balance Fe and unavoidable impurities. Compared with the prior art, the technical scheme makes the low-carbon steel plate obtain the good forming performance, the thickness of scale of the low-carbon steel plate is remarkably reduced, the amount of acid liquor is reduced for low-carbon steel plates needing the pickling procedure, and the production efficiency is improved. The low-carbon steel plate is mainly used for manufacturing various forming structural parts.

Description

technical field [0001] The invention relates to the technical field of production technology of thin slab continuous casting and rolling steel, in particular to a low-carbon steel plate with excellent formability in CSP process and a manufacturing method thereof. Background technique [0002] The CSP process produces low-carbon steel with a carbon content of 0.045-0.065%. Due to the characteristics of the process itself, its structure is relatively small and its strength is relatively high. The yield strength is about 290-330MPa, the tensile strength is about 350-390MPa, and the strain hardening When the index n value is below 0.20, the plastic strain ratio The value is below 1.0, so that the formability of the low carbon steel plate produced by CSP is relatively poor. [0003] A number of patents have been applied for methods for reducing the strength of low-carbon steel plates in the CSP process and improving their formability. For example: Patent CN 106244921A on Decem...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C33/04B21C37/02
CPCB21C37/02C22C33/04C22C38/02C22C38/04C22C38/06
Inventor 胡学文彭欢李耀辉刘茂林王海波
Owner MAGANG (GROUP) HOLDING CO LTD