Production method of low carbon deep drawing cold rolled steel sheet

A technology of cold-rolled steel plate and production method, which is applied in the production field of low-carbon deep-drawing cold-rolled steel plate, can solve the problems of increasing the difficulty of process control and high product cost, and achieves the advantages of low implementation difficulty, reduced comprehensive cost and low comprehensive cost. Effect

Active Publication Date: 2012-01-04
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
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Problems solved by technology

However, the addition of Ti increases the difficulty of process control in the smelting and continuous casting stages, and the product cost is high

Method used

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  • Production method of low carbon deep drawing cold rolled steel sheet
  • Production method of low carbon deep drawing cold rolled steel sheet
  • Production method of low carbon deep drawing cold rolled steel sheet

Examples

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Embodiment

[0025] The production process of the embodiment sequentially includes: molten iron pretreatment, molten steel smelting, molten steel refining, continuous casting, soaking, hot rolling, cooling, coiling, pickling, cold rolling, annealing, and leveling, and the equipment is conventional equipment. The weight percentage of the slab chemical composition is: C 0.03~0.08%, Si≤0.03%, Mn 0.15~0.40%, P≤0.020%, S≤0.025%, Al 0.020%~0.070%, the balance is Fe and unavoidable impurities.

[0026] According to the design parameters of the continuous casting equipment, the thickness of the continuous casting slab is 200mm. The final plate thickness specifications of the examples are all 1.0mm, the rough rolling reduction ratio of the slab in the hot rolling stage is controlled at 80% to 85%, the finishing rolling reduction ratio is controlled at 85% to 95%, and the reduction ratio in the cold rolling stage is controlled at 80% to 85%. The lower rate is controlled at 65% to 85%, and the elong...

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Abstract

The invention relates to a production method of a low carbon deep drawing cold rolled steel sheet and provides a production method for producing the low carbon deep drawing cold rolled steel sheet with the conventional equipment. A continuous casting slab has the same components as the 80Al steel and the thickness of the slab is no less than 180 mm. The production method is as follows: the slab is uniformly heated to 1150-1200 DEG C to perform hot rolling, wherein the rough rolling reduction rate of the hot rolling is 80-85%, and the precision rolling reduction rate is 85-95%; and finish rolling is performed at 860-900 DEG C; the obtained slab is forced to be cooled to 530-570 DEG C and then naturally cooled in the air to 510-550 DEG C for sheet coiling; the cold rolling reduction rate is65-85%; and a bell-type annealing furnace is used for annealing, wherein the coiled sheet is uniformly heated at 500-520 DEG C and then is heated at a speed of 25-30 DEG C / h, annealing is performed at a constant temperature of 690-720 DEG C for 20-22 h, and the product is cooled to 130 DEG C along with the furnace and then discharged for air cooling. The whole production method is easy to carry out and has good control performance; and the finished product has good comprehensive performance.

Description

technical field [0001] The invention relates to a production method of a low-carbon steel cold-rolled steel sheet, in particular to a production method of a low-carbon deep-drawn cold-rolled steel sheet. Background technique [0002] Deep-drawn cold-rolled steel plates, including two series of low-carbon steel and interstitial-free atomic steel, are used to produce complex deep-drawing and deformed parts such as automobiles. St14, EU grade DC04. In terms of composition, the deep-drawn cold-rolled steel sheet of the low-carbon steel series includes two types: 1. Low-carbon deep-drawn cold-rolled steel sheet. According to the requirements of the national standard, the chemical composition of the low-carbon deep-drawn cold-rolled steel sheet is: C≤ 0.08%, Si≤0.03%, Mn≤0.40%, P≤0.020%, S≤0.025%, Al 0.020%~0.070%, the balance is Fe and inevitable impurities; 2. Microalloys with alloying elements such as Ti added Steel deep-drawn cold-rolled steel sheet. [0003] The production...

Claims

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Application Information

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IPC IPC(8): C22C38/04C21D8/02
Inventor 王敏莉郑之旺梁英刘勇翁建军尹红国王平利张功庭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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