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Continuous casting production method for high-carbon high-manganese wear-resistant sheet billet

A production method and technology for steel slabs, which are applied in the field of casting production of high-carbon and high-manganese wear-resistant steel, can solve the problems of poor pourability, low liquidus temperature and difficulty in continuous casting production, and achieve universal equipment and technology. Strong performance, wide process applicability, and the effect of reducing production costs

Inactive Publication Date: 2012-11-28
BAOSTEEL SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the characteristics of Mn13, such as high carbon and manganese content, large alloy ratio, low liquidus temperature, and relatively large difference between solid and liquidus lines, it is difficult to control the continuous casting process, the castability of continuous casting production is not strong, and casting is difficult. It is relatively large. At present, die casting is generally used for production in China. Although a few manufacturers have succeeded in continuous casting, they are scrapped due to cracks and other defects in the hot rolling process.
[0004] Since this steel is a high-carbon and high-manganese steel, there are two main problems in the production process: carbide precipitation and thermal stress concentration. Major domestic manufacturers have carried out a large number of continuous casting production tests, because these two problems cannot be solved. re-production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Production of high carbon and high manganese steel by slab continuous casting:

[0038] The process flow is: AC electric arc furnace of more than 40 tons (EBT tapping, adding refining slag, various necessary ferroalloys, carburizers and aluminum deoxidizers) → ladle furnace refining of corresponding tonnage (bottom blowing argon) → corresponding Tonnage of vacuum furnace degassing → ladle casting - tundish continuous casting Mn13 slab (150 × 1100mm).

[0039]In the first step, in the AC electric furnace, the AC current and oxygen are fed in to melt the loaded furnace material into molten steel at a temperature range of 1580 ° C, and input about 29 cubic meters of oxygen per ton of steel into the molten steel, intermittently Outflow of oxidizing slag and replenishment of lime not greater than 8 kg / ton of steel. The temperature was measured at 1620°C before tapping.

[0040] The second step, (1) preparation of the ladle for receiving the molten steel: the refractory mat...

Embodiment 2

[0044] In the fourth step of slab continuous casting, the molten steel poured into the crystallizer from the tundish is protected by submerged nozzles. Others are the same as embodiment 1.

Embodiment 3

[0046] In the fourth slab continuous casting process, the molten steel poured into the crystallizer from the tundish is protected by submerged nozzles, and the molten steel in the crystallizer is covered with mold slag. Others are the same as embodiment 1.

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PUM

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Abstract

The invention provides a continuous casting production method for a high-carbon high-manganese wear-resistant sheet billet. The method comprises an electric furnace primary smelting process, a ladle furnace refining process, a ladle casting process and a tundish sheet billet continuous casting process, wherein the tundish sheet billet continuous casting process comprises the following steps of: allowing molten steel in a tundish to flow into a mold, regularly vibrating the mold, so that the molten steel gradually moves downwards, stirring and cooling in a secondary cooling zone during downward movement, and gradually solidifying to form continuous casting high-carbon high-manganese wear-resistant steel plate; controlling the superheat of the molten steel in the tundish to be 20 to 35 DEG C; and controlling the continuous casting pulling speed to be 0.5 to 0.70m per minute on a 200*(1,100-1,300)mm large section, and controlling the pulling speed to be 0.80 to 1.00m per minute on a 150*(1,100-1,300)mm large section. The billet continuous casting production method is suitable for general high-carbon high-manganese steel; and compared with the die casting, the continuous casting production method has the advantages that the yield is greatly improved, the production cost is reduced, and the competitiveness of an enterprise is improved.

Description

technical field [0001] The invention relates to the field of alloy steel smelting-casting in the metallurgical industry, in particular to a casting production method for high-carbon, high-manganese wear-resistant steel. Background technique [0002] High manganese wear-resistant steel plates have been widely used in parts that are easily worn by strong impact, such as wear-resistant lining plates of mechanical equipment. Castings have long been eliminated for liners and guards of foreign wear-resistant machinery, and high-manganese wear-resistant steel Mn13 rolled steel plates are used. High-manganese wear-resistant steel Mn13 hot-rolled steel plate is widely used in shot blasting machines, ball mills, pulverizers, safes, bulletproof vehicles and other parts that are easily worn by strong impact due to its excellent wear resistance. It has been used in shipbuilding, automobiles, machinery, etc. It has been widely used in high-end users of foreign capital and joint ventures ...

Claims

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Application Information

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IPC IPC(8): B22D11/16B22D11/22B22D11/053
Inventor 李元朱信国李泰庆施威刘军占顾家强
Owner BAOSTEEL SPECIAL STEEL CO LTD