Twin-roller double-strip composite-structured thin strip continuous casting and rolling method

A composite structure, continuous casting and rolling technology, applied in metal rolling and other directions, can solve the problems of low surface grade, low steel strip continuous casting speed, and high thermal energy, and achieve easy control, strong production process adaptability, and surface quality. high effect

Inactive Publication Date: 2011-05-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the materials produced by thin strip continuous casting are steel plates with low surface grades. The problem of surface quality is the main bottleneck restricting the development of thin c

Method used

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  • Twin-roller double-strip composite-structured thin strip continuous casting and rolling method
  • Twin-roller double-strip composite-structured thin strip continuous casting and rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]In order to achieve industrial production of twin-roll twin-belt continuous casting, the laboratory simulates the method of making thin boxes from bimetallic plates. 2mm thick low-carbon steel plate is used to make a thin box with a width of 1 meter, a length of 100mm, and a thickness of 6mm. The outside of the thin box is cooled by a copper water tank. Use a 2mm nozzle to inject molten steel into the middle groove of the thin box, and then send it to the rolling mill for rolling after it is completely filled. The thickness of the final strip is 2mm. The cast strip has good surface quality and no internal defects, with an average grain size of 5 microns.

Embodiment 2

[0041] Process is the same as embodiment 1, is the thin box that is made of stainless steel. The thin strip finally obtained is a thin strip with a surface layer of stainless steel and a diffusion layer at the interface. The surface quality reaches the quality of hot-rolled stainless steel.

Embodiment 3

[0043] The process is the same as in Example 1, except that one side is a thin box made of 2mm stainless steel and the other side is a 3mm copper plate. The thin strip finally obtained is a thin strip whose surface layer is stainless steel on one side and copper on the other. The diffusion layer at the copper-steel interface is relatively large and well bonded. The surface quality reaches the quality of hot-rolled stainless steel, and the copper surface is oxidized to a certain extent, and the deformation is relatively large.

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Abstract

The invention relates to a twin-roller double-strip composite-structured thin strip continuous casting and rolling method. In a twin-roller continuous casting process, a molten steel bath is formed jointly by two metal master strips respectively through two crystallizing rollers rotating oppositely, molten metal is crystallized and solidified on the master strips so as to from a composite casting strip under the casting-rolling effect of the crystallizing rollers, and then the finished thin strip is formed after rolling. The method disclosed by the invention guarantees high surface quality of the composite casting strip and high casting efficiency, without a cast-on problem, and can be used for casting composite-constituted and composite-structured thin strips.

Description

technical field [0001] The invention relates to the thin metal strip continuous casting technology, in particular to a thin strip continuous casting and rolling method with a double-roller double-belt composite structure. Background technique [0002] Thin strip continuous casting technology is a cutting-edge technology in the field of metallurgy and material research. Its appearance is bringing a revolution to the iron and steel industry. It has changed the production process of thin steel in the traditional metallurgical industry. [0003] Traditional thin steel generally adopts the slab continuous casting method, which needs to go through multiple passes of hot rolling and repeated cold rolling in production. Disadvantages such as high energy consumption, complex process, long production cycle, high labor intensity, high product cost, and difficulty in changing production. Thick slab (200-300mm) continuous casting and rolling process line length is generally between 500-...

Claims

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Application Information

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IPC IPC(8): B21B1/46
Inventor 张俊宝方园叶长宏
Owner BAOSHAN IRON & STEEL CO LTD
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