Method for producing high-temperature alloy by induction heating vacuum refining

A technology of induction heating and high-temperature alloys, which is applied in the field of high-temperature alloys, can solve the problems of poor product quality, high cost of raw materials, and poor ability to remove inclusions, and achieve the effects of reduced gas content in finished products, reduced inclusions in molten steel, and reduced production costs

Inactive Publication Date: 2008-12-17
上海丰渠特种合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect that this new technology allows for better quality control while minimizing unwanted impurities from being produced by improving the efficiency of producing high-quality products through continuous processing techniques such as casting processes. This results in fewer defective parts and increased overall yield compared to previous methods.

Problems solved by technology

This patents describes different ways to produce alloyed metals with improved properties such as strength or durability without requiring expensive equipment like an electric arc weld machine (EWI). However, current processes are limited because they require either large amounts of energy input during production or involve harmful chemical substances that may contaminate the environment when produced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Production of GH2132 superalloy

[0029] Use induction heating to melt the GH2132 molten steel matched in proportion in a 2-ton induction steelmaking furnace;

[0030] Raise the temperature of molten steel to 1450°C;

[0031] Adding CaO-Al on the surface of molten steel 2 o 3 Refining slag is 30kg; of which: CaO-Al 2 o 3 Medium is 10% Al 2 o 3 ;

[0032] After melting the refining slag, add a vacuum cover for vacuum treatment; during this process: on the one hand, argon gas is supplied to the furnace from the vent plug at the bottom of the refining ladle, and the flow rate of argon gas is kept at 10 liters per minute; on the other hand, the induction refining The vacuum in the steel furnace is kept at 5Pa;

[0033] Keep the heating power of the induction steelmaking furnace at 150KW;

[0034] Refining time is controlled at 25 minutes;

[0035] Refining is completed, vacuum treatment is completed, and slag is removed;

[0036] Under the protection of argon, the s

Embodiment 2

[0038] Production of Inconel600 superalloy

[0039] In a 2-ton induction steelmaking furnace, use induction heating to melt the Inconel600 molten steel matched in proportion;

[0040] Raise the temperature of molten steel to 1550°C;

[0041] Adding CaO-Al on the surface of molten steel 2 o 3 Refining slag is 50kg; of which: CaO-Al 2 o 3 Medium is 20% Al 2 o 3 ;

[0042] After melting the refining slag, add a vacuum cover for vacuum treatment; during this process: on the one hand, argon gas is supplied to the furnace from the vent plug at the bottom of the refining ladle, and the flow rate of argon gas is kept at 15 liters per minute; on the other hand, the induction refining The vacuum in the steel furnace is kept at 5Pa;

[0043] Keep the heating power of the induction steelmaking furnace at 250KW;

[0044] Refining time is controlled at 30 minutes;

[0045] Refining is completed, vacuum treatment is completed, and slag is removed;

[0046] Under the protection of arg

Embodiment 3

[0048] Production of Incoloy800H superalloy

[0049] In a 2-ton induction steelmaking furnace, use induction heating to melt the Incoloy800H molten steel matched in proportion;

[0050] Raise the temperature of molten steel to 1600°C;

[0051] Adding CaO-Al on the surface of molten steel 2 o 3 Refining slag is 60kg; of which: CaO-Al 2 o 3 Medium is 15% Al 2 o 3 ;

[0052] After melting the refining slag, add a vacuum cover for vacuum treatment; during this process: on the one hand, argon gas is supplied to the furnace from the vent plug at the bottom of the refining ladle, and the flow rate of argon gas is kept at 20 liters per minute; on the other hand, the induction refining The vacuum in the steel furnace is kept at 10Pa;

[0053] Keep the heating power of the induction steelmaking furnace at 500KW;

[0054] Refining time is controlled at 40min;

[0055] Refining is completed, vacuum treatment is completed, and slag is removed;

[0056] Under the protection of argon

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Abstract

The invention discloses a method for producing high-temperature alloy by adopting induction heating vacuum refining, which is realized through the following steps that: in a 1 to 3-ton induction steelmaking furnace, induction is utilized to heat molten steel; the temperature of the molten steel is increased to 1380 DEG C to 1650 DEG C; 20 to 80 kg of CaO-Al2O3 (5 to 30 percent of Al2O3) refining slag series is added to the surface of the molten steel, wherein, CaO-Al2O3 contains 5 percent to 30 percent of Al2O3; after melting and refining slag, vacuum treatment is carried out by being covered with a vacuum cover; during the vacuum treatment, on one hand, argon gas is fed into the furnace through a porous plug at the bottom of the induction steelmaking furnace, and the flow of argon gas is kept at 5 to 20 liters/minute; on the other hand, the vacuum pressure in the induction steelmaking furnace is kept between 0 and 10Pa; the heating power of the induction steelmaking furnace is kept between 100 and 600KW; the refining time is kept between 15 and 45 minutes; after refining and vacuum treatment, slagging-off is carried out; under the protection of argon gas, tapping and ingot teeming are carried out; by adopting the method of the invention, gas contained in finished product and impurity contained in molten steel are greatly reduced; chemical compositions are very much uniform; product performance is greatly improved; besides, the production cost is greatly reduced.

Description

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Claims

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Application Information

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Owner 上海丰渠特种合金有限公司
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