Process of producing high quality carbon steel ingot with aluminium and RE added for high grade forging

A technology of high-quality carbon steel and production process, applied in the field of iron and steel smelting, can solve the problems of coarse structure of steel ingots, unfavorable forging of high-quality forgings, etc., and achieve the effect of improving the level of flaw detection

Inactive Publication Date: 2007-06-27
RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The invention overcomes the disadvantages of simply using a certain deoxidizer for deoxidation, resulting in coarse structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Final deoxidation is used for 45# high-quality steel ingot 9.42T type 12, first add aluminum 0.5Kg / t steel to smelt for 10 minutes, then add rare earth 0.5Kg / t steel and then smelt, inject into the ingot mold, reaching 7-9 times the solidification time When demoulding, the steel ingot is forged into a shaft and the forging is tested for flaws. The flaw detection grades are all in line with the second level of the national standard.

Embodiment 2

[0013] Final deoxidation is adopted for 16 pieces of 35# high-quality steel ingot 9.0T type. First add aluminum 0.9Kg / t steel to smelt for 15 minutes, then add rare earth 0.8Kg / t steel to smelt and inject it into the ingot mold to reach 7-9 times the solidification time. When demoulding, and after forging the shaft, the forgings are inspected, and the inspection grades are all in line with the second level of the national standard.

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PUM

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Abstract

The present invention is the technological process of adding aluminum and RE to produce high quality carbon steel ingot for high grade forging. During producing high quality carbon steel ingot, final deoxidizing agent of aluminum and RE is adopted and aluminum in 0.5-0.9 Kg and RE in 0.5-0.8 Kg for each ton of steel are added successively while smelting, and the steel ingot is demolded after 7-9 times the setting time. The high quality carbon steel ingot of the present invention may be used in producing high grade forging.

Description

Technical field [0001] The invention relates to iron and steel smelting technology, in particular to a production process for adding aluminum and rare earths to high-quality carbon steel ingots to improve the flaw detection level of forgings. Background technique [0002] At present, the production method of high-quality carbon steel ingots is to first smelt solid raw materials into molten steel in an electric furnace, use refining slag for refining during the reduction period, and finally add trace amounts of aluminum or rare earths, silicon-aluminum-calcium-barium and other strong deoxidizers for deoxidation before pouring into molten steel. Cooling and forming in the ingot mold. Such a process is better than deoxidizing without a strong deoxidizer, but the structure of the steel ingot is coarse and the segregation is serious. When the steel ingot is used for forging products, it cannot guarantee that the flaw detection of the steel ingot after forging reaches the third level o...

Claims

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Application Information

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IPC IPC(8): C21C7/06B22D11/16
Inventor 刘南平陈振中周康官常忠
Owner RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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