Continuous casting and rolling productive technology for figured steel and arc simultaneous motion crystallizer
A technology of continuous casting, continuous rolling and production process, applied in metal rolling and other directions, can solve the problems of difficult surface quality control, large drawing resistance, difficult casting, etc., to reduce surface defects, reduce investment, and achieve good product quality.
Inactive Publication Date: 2006-10-11
LAIWU IRON & STEEL GRP
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Problems solved by technology
Near-net-shape continuous casting of special-shaped steel, due to relatively large surface area and complex cross-section (for example, the web thickness of H-shaped steel is less than 30mm), it is difficult to control the surface quality by traditional continuous casting technology, the casting resistance is large, and pouring is difficult. Whether or not high casting speed can be achieved is a restrictive link in the realization of continuous casting and rolling.
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and with the accompanying drawings as examples.
[0036]The continuous casting and rolling production process of special-shaped steel in the present invention is a combination of ultra-high-speed near-net-shape continuous casting technology and a new generation of steel material production technology. The process flow is: molten steel supply—steel receiving area—continuous casting ——Secondary cooling zone——Straightening—Tunnel-type billet temperature-controlled furnace—Finish rolling.
[0037] The so-called ultra-high-speed near-net shape continuous casting is carried out in an arc-shaped synchronous motion mold, single-strand continuous casting, casting speed 10-120m / min, casting radius 2.50-4.50m, the best casting radius is 3m. In order to prevent secondary oxidation during pouring, it is necessary to protect the ladle with argon gas. The dummy head is used ...
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Abstract
The invention is a continuous casting and rolling production process of special-shaped steel, which combines the ultra-high speed near-net shape continuous casting technology with the new generation of steel material rolling technology, and can realize full-automatic control of the whole line; it has production efficiency High, low energy consumption, compact process, no need to use any mold powder or lubricant during continuous casting, the crystallizer and billet shell keep synchronous movement, when the continuous casting machine starts, only the dummy head is used to seal the bottom of the crystallizer, and the billet shell After demoulding from the crystallizer, after passing through the secondary cooling section, the pinch rolls are sent to the rolling straightening machine for straightening and then rolled directly. The process is compact, the logistics is reasonable, and it is friendly to the environment. It can realize the integrated production of casting and rolling of special-shaped steel products. In particular, it can realize the integrated casting and rolling production of near-net shape special-shaped H-beam, which is 1 / 10-1 / 5 of the investment in the original near-net-shape continuous casting special-shaped billet H-beam production process line.
Description
technical field [0001] The invention belongs to the production technology of steel products, and in particular relates to the integrated production technology of continuous casting and rolling, and specifically relates to the integrated production of near-end casting and rolling of special-shaped section steel profiles. Background technique [0002] In order to further improve production efficiency and reduce costs, near net shape continuous casting and rolling is the mainstream of development. The near-net shape thin strip continuous casting and rolling technology is at the forefront. For example: (1) CSP production process: Schloemann-Siemag (SMS) compact hot strip production (CSP) uses a funnel-shaped crystallizer to solve the problem of molten steel supply. After being heated in a channel heating furnace and dephosphorized by high-pressure water, it is rolled by a multi-stand finishing mill. (2) ISP production process: The online tropical production (ISP) process was d...
Claims
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IPC IPC(8): B21B1/46
Inventor 张胜生董杰李丰功张君法傅博丛玉伟李伟刘平焉永刚杜传治杨君胜李焱郭颖韬张兆柱谢宝木王召祥刘国权王军潘辉
Owner LAIWU IRON & STEEL GRP