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A kind of low carbon steel for stamping based on thin strip casting and rolling and its manufacturing method

A manufacturing method and thin strip casting and rolling technology, applied in the field of steel production, can solve the problems of inconsistent deformation in all directions, and achieve the effects of reducing ear making, good stamping performance and fewer production processes

Active Publication Date: 2021-10-29
SHAGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention provides a production method of low-carbon steel for stamping based on thin-strip casting and rolling, to solve the problems of inconsistent deformation in all directions during deep drawing of conventional low-carbon steel, and to achieve energy saving and environmental protection

Method used

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  • A kind of low carbon steel for stamping based on thin strip casting and rolling and its manufacturing method
  • A kind of low carbon steel for stamping based on thin strip casting and rolling and its manufacturing method
  • A kind of low carbon steel for stamping based on thin strip casting and rolling and its manufacturing method

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Embodiment 1

[0039] (1) Smelting: In step (1), EAF electric furnace steelmaking is used, VD vacuum decarburization and deoxidation, and LF refining are used to obtain molten steel with qualified components. Percent by weight: C: 0.022, Mn: 0.476, Si: 0.133, P: 0.011, S: 0.002, Al: 0.002, and the balance is Fe and impurity elements.

[0040] (2) Thin strip continuous casting: The molten steel with qualified components is cast and rolled by twin-roll thin strip casting and rolling equipment. With continuous casting. A cast strip having a thickness of 1.82 mm was obtained.

[0041] (3) Hot rolling: the cast strip is then rolled into a thin strip of 1.5mm through one pass of hot rolling with a reduction of 18%, and the rolling exit temperature is 870°C.

[0042] (4) Cooling and coiling: the hot-rolled thin strip is cooled to 580°C by an air-mist cooling system, and the hot-rolled coil is obtained after coiling, and then air-cooled to room temperature. The stamping test of the obtained thin ...

Embodiment 2

[0046] (1) Smelting: In step (1), EAF electric furnace steelmaking is used, VD vacuum decarburization and deoxidation, and LF refining are used to obtain molten steel with qualified components. Percent by weight: C: 0.022, Mn: 0.476, Si: 0.133, P: 0.011, S: 0.002, Al: 0.002, and the balance is Fe and impurity elements.

[0047](2) Thin strip continuous casting: The molten steel with qualified components is cast and rolled by twin-roll thin strip casting and rolling equipment. With continuous casting. A cast strip having a thickness of 1.82 mm was obtained.

[0048] (3) Hot rolling: the cast strip is then rolled into a thin strip of 1.5mm through one pass of hot rolling with a reduction of 18%, and the rolling exit temperature is 870°C.

[0049] (4) Cooling and coiling: the hot-rolled thin strip is cooled to 580°C by an air-mist cooling system, and the hot-rolled coil is obtained after coiling, and then air-cooled to room temperature. The stamping test of the obtained thin p...

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Abstract

The invention provides a method for manufacturing low-carbon steel for stamping based on thin-strip casting and rolling. : ≤0.003%, P: ≤0.02% and greater than 0, S: ≤0.005% and greater than 0, and the balance is Fe and impurity elements. The raw materials are smelted to obtain molten steel with qualified components, and cast strips are obtained through thin strip continuous casting. After the cast strips are hot-rolled with a reduction of 5-40% in one pass, they are cooled by an air-mist cooling system and coiled to obtain thin strip steel. Among them, the exit temperature of the rolling mill is 1000-850°C, and the coiling temperature is 450-700°C. The invention solves the problems of long production process and high energy consumption of traditional low-carbon steel for stamping, and solves the problem that the traditional strip steel for stamping has great difference in transverse and rolling properties, which is unfavorable for deep drawing.

Description

technical field [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to a low-carbon steel for stamping based on thin strip casting and rolling and a manufacturing method thereof. Background technique [0002] Due to its good tensile and bending properties and good stamping formability, low carbon steel can be cold formed by curling, bending, stamping and other methods, and is widely used in industries such as automobiles, home appliances and construction, and the market demand is relatively big. [0003] The existing production process of low-carbon steel plate for stamping is: molten steel smelting→thick slab (or thin slab) continuous casting→rough rolling→hot continuous rolling→laminar water cooling→coiling. The existing production process has problems such as long production process, many manufacturing processes, large energy consumption, and large environmental load. Moreover, due to the limitation of the producti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/04C22C38/02B22D11/06C21D8/02
CPCB22D11/0622C21D8/0226C21D2211/005C22C38/02C22C38/04C22C38/06
Inventor 冯庆晓李化龙刘俭施一新李霞马毅史华跃周东升顾小祥
Owner SHAGANG GROUP