Low-carbon steel for deep drawing and smelting method thereof

A smelting method and low-carbon steel technology, applied in the direction of manufacturing converters, etc., can solve the problems of long smelting cycle and high smelting cost, and achieve the effects of shortening smelting cycle, reducing smelting cost, and widening the control window of converter end point

Inactive Publication Date: 2015-09-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a low-carbon steel for deep drawing and its smelting method, which solves or partially solves the technical problems of long smelting period and high smelting cost in the prior art

Method used

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  • Low-carbon steel for deep drawing and smelting method thereof
  • Low-carbon steel for deep drawing and smelting method thereof
  • Low-carbon steel for deep drawing and smelting method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 3

[0067] The embodiment of the present invention takes 3 furnaces as an example, specifically comprising the following steps:

[0068] Step 1, molten iron KR desulfurization treatment, adding desulfurized molten iron into the dephosphorization converter and decarburization converter for double smelting, the composition and temperature of the converter end point are shown in Table 1.

[0069] Stoves

[C] / ％

[O] / ppm

temperature / ℃

1

0.044

550

1686

2

0.058

440

1670

3

0.048

480

1679

[0070] Table 1 Composition and temperature at end point of converter

[0071] In step 2, the molten steel is directly tapped without deoxidation, the slag is added to modify the slag during the tapping process, and the slag is used to tap the steel during the tapping process. The slag material and ladle slag thickness added in the tapping process are shown in Table 2.

[0072] Stoves

Small grains of lime / kg...

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Abstract

The present invention relates to the technical field of steel-making, and discloses a low-carbon steel for deep drawing and a smelting method thereof. The method comprises: adding desulfurized molten iron into dephosphorization converter and decarbonization converter for duplex smelting; blowing in decarbonization converter and directly tapping, which is tapping without converter deoxidation; carrying out light treatment refining process on the molten steel after tapping to obtain low-carbon steel for deep drawing. The method not only shortens the refining cycle, but also reduces the cost of smelting.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a low-carbon steel for deep drawing and a smelting method thereof. Background technique [0002] IF steel, the full name of Interstitial-Free Steel, that is, interstitial-free steel, sometimes called ultra-low carbon steel, has excellent deep drawing properties, and now the elongation and r value can reach 50% and more than 2.0, and it is widely used in the automotive industry. has been widely used. [0003] In the existing smelting process of IF steel, since converter deoxidation tapping is required and molten steel is subjected to RH deep decarburization treatment, the smelting period of the existing IF steel for deep drawing is long and the smelting cost is high. [0004] To sum up, a method for smelting low-carbon steel for deep drawing with short smelting period and low smelting cost is needed. Contents of the invention [0005] The invention provides a low-carbon st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21C5/28C21C7/10
Inventor 李一丁刘再旺季晨曦黄学启崔阳王志鹏潘宏伟代乐乐曾智薛勇强
Owner SHOUGANG CORPORATION
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