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Production method of ultrathin hot-rolled strip steel

A technology of hot-rolled strip steel and production methods, applied in heat treatment furnaces, metal rolling, heat treatment equipment, etc., can solve problems such as deterioration of steel performance and quality, cracking, and increased production operating costs, and achieve economical production processes and low cost. Short Effect of Carbon Requirements

Inactive Publication Date: 2020-03-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Electric furnace steelmaking is used to provide molten steel, and scrap steel is used as the main raw material. Traditional processes such as die casting or thick plate continuous casting have a solidification cooling rate of only 10 -1 ~10°C / s, these residual elements in the scrap steel will segregate at the grain boundary during the solidification process, which will deteriorate the performance and quality of the steel, and in severe cases, cracking and fracture will occur directly. Therefore, in the traditional process, these harmful elements Strict control is required in the selection of scrap raw materials, some pre-screening is required, and some special treatment is required in the steelmaking process, such as adding some concentrates for dilution, etc., which undoubtedly increases the cost of production operations

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  • Production method of ultrathin hot-rolled strip steel

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings of the present invention. In order to keep the following description of the present invention clear and concise, a detailed description of known techniques is omitted in the detailed description.

[0017] Such as figure 1 As shown, the production method of the ultra-thin hot-rolled steel strip of the present invention includes the following process steps: smelting process, refining process, continuous casting process, hot rolling process and cooling coiling process. Each process step is described in detail below:

[0018] A, smelting process: the steel scrap is sent to the induction furnace 1 for smelting, so that the steel scrap is melted into molten steel;

[0019] Put the steel scrap (unified waste grade) that does not need to be so...

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Abstract

The invention discloses a production method of ultrathin hot-rolled strip steel. The method comprises the following process steps of A, smelting procedure: feeding scrap steel into an electric induction furnace for smelting such that the scrap steel is smelted into molten steel; B, refining procedure: refining the molten steel by using a ladle refining furnace and a ladle vacuum degassing furnace;C, continuous casting procedure: casting the refined molten steel into a casting strip blank with the thickness of 1.6-2.5 mm through a double-roller thin strip continuous casting system; D, hot rolling procedure: directly sending the casting strip blank formed in the continuous casting procedure into a single-rack hot rolling mill to be rolled to prepare hot-rolled strip steel with the thicknessof 0.8-1.5 mm; and E, cooling and coiling procedure: carrying out atomization cooling treatment on the hot-rolled strip steel, controlling the temperature of the strip steel to be 400-750 DEG C, andcoiling. According to the method, an extremely compact, environment-friendly and economic ultrathin hot-rolled strip steel production process flow is realized, and the environment-friendly and economic continuous production of metal plates and strips is realized.

Description

technical field [0001] The invention relates to the technical field of hot-rolled steel strip production, in particular to a production method of ultra-thin hot-rolled steel strip. Background technique [0002] In recent years, hot-rolled strip steel has gradually developed in the direction of ultra-thin specifications. Thin-gauge hot-rolled strips can not only reduce the number of cold-rolled rolling passes and reduce production costs when used as cold-rolled raw materials, but also open up new uses and new markets for hot-rolled strips, and some products can replace cold-rolled strips , Bring huge economic benefits to manufacturers and users. [0003] In order to save investment cost and production cost, modern iron and steel production enterprises actively carry out technological innovation on the existing production process. Aiming at the problems of long process length, many equipments and complexity in the existing hot strip production process, many manufacturers clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/06B22D11/116B22D11/12B21B1/46
CPCB22D11/0622B22D11/116B22D11/12B21B1/463B22D11/1206B22D11/124B22D11/144B22D11/14B22D11/18B22D11/20B22D41/13B22D1/00B22D11/103B21B37/76C21D8/0215C21D8/0226C21D1/667C21D8/0263C21D9/46Y02P10/20B21B1/22B21B2001/225B22D11/1246C21D8/0205C21D9/52
Inventor 方园吴建春张健
Owner BAOSHAN IRON & STEEL CO LTD
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