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Method for producing extra-deep drawing cold-rolled steel plate based on ASP process

A technology of cold-rolled steel sheets and ultra-deep drawing grades, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve problems such as cold-rolled steel sheets that have not yet been used, so as to broaden the range of product varieties, improve product competitiveness, and produce low cost effect

Inactive Publication Date: 2013-05-08
SHANDONG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ASP production process has not been used to produce cold-rolled steel sheets for deep-drawing and ultra-deep-drawing grades and above.

Method used

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  • Method for producing extra-deep drawing cold-rolled steel plate based on ASP process
  • Method for producing extra-deep drawing cold-rolled steel plate based on ASP process
  • Method for producing extra-deep drawing cold-rolled steel plate based on ASP process

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Embodiment 1

[0028] Embodiment 1 of the present invention comprises the following steps successively:

[0029] (1) Hot metal pretreatment: use the KR method for hot metal pretreatment for deep desulfurization, and control the sulfur content of the molten iron into the furnace below 0.003% (wt / wt) after slag removal;

[0030] Steelmaking: The steelmaking furnace adopts a 120-ton converter, the tapping volume is 148.61 tons, the weight percentage of carbon is 0.0469% when tapping, and the tapping temperature is 1644°C;

[0031] The molten steel from the converter is deoxidized and slagged and temperature controlled in the LF refining furnace. The specific process: the treatment cycle is 61 minutes, the heating time is 34 minutes, the arrival temperature is 1563°C, the exit temperature is 1642°C, and the compressed air flow rate is 300m 3 , Feed 120kg of aluminum pellets.

[0032] The molten steel from the steelmaking furnace is refined in the RH furnace, and the alloy composition is adjuste...

Embodiment 2

[0051] Embodiment 2 of the present invention comprises the following steps successively:

[0052] (1) Hot metal pretreatment: use the KR method for hot metal pretreatment for deep desulfurization, and control the sulfur content of the molten iron into the furnace below 0.003% (wt / wt) after slag removal;

[0053] Steelmaking: The steelmaking furnace adopts a 120-ton converter, the tapping volume is 144.5 tons, the weight percentage of carbon is 0.0497% when tapping, and the tapping temperature is 1631°C;

[0054] The molten steel from the converter is deoxidized and slagged and temperature controlled in the LF refining furnace. The specific process: the treatment cycle is 52 minutes, the heating time is 24 minutes, the arrival temperature is 1554°C, the exit temperature is 1648°C, and the compressed air flow rate is 100m 3 , Feed 110kg of aluminum pellets.

[0055] The molten steel from the steelmaking furnace is refined in the RH furnace, and the alloy composition is adjusted...

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Abstract

The invention discloses a method for producing an extra-deep drawing cold-rolled steel plate based on a sheet billet continuous casting and rolling process in ASP, and belongs to the technical field of rolled steel. After molten steel meeting the component requirement is obtained by adopting molten iron pretreatment, a converter, LF and RH, a hot-rolled substrate is produced by the sheet billet continuous casting and rolling process in the ASP, and the hot-rolled substrate is subjected to acid washing, cold rolling, cover annealing and leveling processes to obtain the extra-deep drawing cold-rolled steel plate. Compared with the prior art, the performance of the produced extra-deep drawing cold-rolled steel plate meets the European standard EN10130-2006, meanwhile, the production cost is reduced, energy is saved and consumption is reduced. The method broadens the variety range of products produced by a sheet billet continuous casting and rolling production line in the ASP, can meet the increasing requirements of the industries of automobiles, home appliances, buildings, transports, light industry and the like for plates, and improves the product competitiveness of enterprises.

Description

technical field [0001] The invention relates to a method for producing ultra-deep drawing cold-rolled steel sheets, in particular to a method for producing ultra-deep drawing cold-rolled steel sheets based on the thin slab continuous casting and rolling process in ASP. Background technique [0002] The production process of the traditional ultra-deep drawing cold-rolled steel plate is: molten steel + continuous casting + continuous casting slab reheating + hot rolling + cold rolling + annealing + smoothing, the thickness of the continuous casting slab is generally 230mm, and the continuous casting slab Hot rolling is required after reheating. At present, there is no report on the production of cold-rolled steel sheets above the deep-drawing grade by the hot-feeding and hot-charging process during hot rolling. Patent 200710130974.1 reports a method for producing deep-drawing grade cold-rolled steel plates using the thin slab continuous casting and rolling (CSP) process. Rol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B45/02B21B37/00C21C7/064C21C5/30C21C7/06C21C7/068C23G1/02C21D9/663
Inventor 孙卫华夏茂森王金华陈银莉徐学永岳峰高元军张磊郭宏伟韩文殿米振莉唐荻
Owner SHANDONG IRON & STEEL CO LTD
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