Novel slag system for improving quality of electroslag remelted steel ingots

A technology of electroslag remelting steel and slag system, applied in the field of new slag system, to achieve the effect of improving structure and performance, good submerged arc performance, and improving hot workability

Inactive Publication Date: 2010-05-19
SHANGHAI UNIV
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Problems solved by technology

But at the same time, electroslag may also become a source of impurities in steel

Method used

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  • Novel slag system for improving quality of electroslag remelted steel ingots
  • Novel slag system for improving quality of electroslag remelted steel ingots
  • Novel slag system for improving quality of electroslag remelted steel ingots

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Embodiment Construction

[0023] Specific embodiments of the present invention are described below.

[0024] The present embodiment adopts specific composition and weight percentage as follows:

[0025] CaF 2 65%,

[0026] Al 2 o 3 twenty two%,

[0027] CaCO 3 8%,

[0028] Y 2 o 3 5%.

[0029] The method of use is as follows:

[0030] Firstly, batching is carried out according to the above-mentioned formula, and slag is obtained for matching blanking. The electroslag remelting and refining of the consumable electrode steel ingot is carried out by using a commonly used crystallizer with a molten pool or a molten pool. First use hot slag to ignite, that is, to melt the electroslag at 1500°C with a melting slag furnace, and then inject it between the consumable electrode and the crystallizer, so that the slag covers the steel ingot, and acts as a resistance heating element to carry out electroslag gravity The process of melting and refining.

[0031] Electroslag ingo...

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Abstract

The invention relates to secondary refining in metallurgical engineering, namely a novel slag system for improving quality of electroslag remelted steel ingots, which belongs to the technical field of metallurgical metal refining. The novel slag system capable of improving quality of electroslag remelted steel ingots is characterized in that the slag system has the following components in percentage by mass: 62 to 68 percent of CaF2, 20 to 26 percent of Al2O3, 6 to 8 percent of CaCO3, and 4 to 8 percent of Y2O3, and the slag system is low in melting point, good in stability and strong in capability of adsorbing inclusions. The slag system can ensure no burning loss of active elements in steel and alloy in the electroslag remelting process, and can effectively reduce the content of gas and inclusions in the alloy so as to significantly improve the quality of remelted ingots.

Description

technical field [0001] The invention relates to a new type of slag system for secondary refining in metallurgical engineering, namely electroslag remelting to improve the quality of steel ingots. It belongs to the technical field of metallurgical engineering metal refining. Background technique [0002] Electroslag Remelting (ElectroslagRemelting referred to as ESR) is also called electroslag refining. It casts or forges steel smelted in converter, electric arc furnace or induction furnace as a consumable electrode (the electrode can be cast, forged or welded by cutting the head and tail of steel), and is heated by slag resistance. The secondary remelting makes the electrode melt into the slag pool, and the liquid metal crystallizes at the bottom of the slag pool to form an ingot. Before smelting, put the bottom pad of the same steel type on the crystallizer chassis, and then put the broken steel chips and the mixed solid flux. Melting begins, after the molten liquid is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 李绍宏吴晓春谢殷子吕广奇
Owner SHANGHAI UNIV
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