Smelting manufacturing method for high temperature ferric alloy

An iron-based superalloy and production method technology, applied in the field of smelting and casting of superalloys in the metallurgical industry, can solve problems such as rising raw material costs, poor stirring performance of molten steel, and high requirements for N content, and achieve strong versatility in equipment and processes , Reduce smelting cost and reduce production cost

Inactive Publication Date: 2004-04-21
宝钢特钢有限公司
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AI Technical Summary

Problems solved by technology

[0005] In addition, compared with the smelting method of "vacuum self-consumption induction furnace" to produce iron-based superalloys, "salt water lining electric arc furnace smelting method" has the advantages of low smelting cost and no carbon in the furnace lining, but due to the characteristics of the electric arc furnace itself, During smelting, the stirring performance of molten steel is poor, the effect of removing harmful gases and impurities in molten steel is poor, and the desu

Method used

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Embodiment Construction

[0030] specific implementation plan

[0031] The steelmaking workshop of an iron and steel company implements the patent of the invention to produce 2 furnaces of GH2132 grade iron-based superalloy. The process flow is 20 tons of AC electric arc furnace (asphalt lining) melting primary refining-→18 tons of AOD melting-→18 tons of LF refining Furnace adjustment-→ casting Φ430 electrode rod (argon protection casting). The first step is the melting of the electric arc furnace (asphalt lining) and the primary smelting: the primary smelting furnace is the same as other general stainless steel operations, and the melting is greater than 80%, and then oxygen is blown to help the melting; Afterwards, take a full analysis of the samples and pull all the slag; adjust the composition according to the analysis results, the lower limit of Cr, the lower limit of Ni, Si≤0).35%; the temperature is higher than 1630 ° C and tapped. The second step is to melt iron-based superalloy molten steel ...

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Abstract

A technology for smelting the refractory Fe-base alloy includes such steps as primary smelting in ordinary electric arc furnace by return oxygen blowing method and smelting the qualified refractory Fe-base alloy in AOD furnace. Said second step includes blowing the mixture of argon gas and O2 in ratio of 4:1 for decarbonizing, heating, blowing the mixture of argon gas and O2 in ratio of 1:1 when C content is 0.1%, sampling and analyzing, regulating contents of its components, blowing argon gas when C content is 0.03%, adding prereducing slags, prereducing, sampling and analyzing, adding reducing slags, blowing argon for dissolving slags, blowing argon for 3 min, adding Ti in ladle, tapping, and casting rod electrodes.

Description

technical field [0001] The invention relates to a method for smelting and casting a superalloy in the metallurgical industry, in particular to a method for smelting and casting an iron-based superalloy. Background technique [0002] Superalloys are important metal materials necessary for modern aero-engines and rocket engines. It can be used for a long time under high-temperature (generally 600-1000°C) oxidizing atmosphere and gas corrosion conditions under greater stress. Iron-based superalloys are common high-temperature alloys with a high degree of alloying, especially containing active alloying elements (such as aluminum and titanium) and high requirements for alloy purity, so the requirements for smelting processes are strict. [0003] At present, the smelting methods of iron-based superalloys mainly include "vacuum consumable induction furnace smelting + electroslag remelting" or "electric arc furnace smelting + LF refining furnace + electroslag remelting". The use o...

Claims

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Application Information

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IPC IPC(8): C22C33/04
Inventor 胡俊辉刘军占徐明华顾家强季文龙王华赵玉才
Owner 宝钢特钢有限公司
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