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Vacuum reaction intensity refining method and application of vacuum reaction intensity refining method to prepare nickel-based and iron-based alloys

An iron-based alloy, vacuum induction smelting technology, applied in the vacuum reaction strength refining, the application in the preparation of nickel-based iron-based alloys, the field of vacuum induction refining of nickel or nickel alloys or iron alloys, can solve the problem of not really understanding the melt and iron alloys The importance of contact in the vacuum area, etc., to achieve the effect of smaller size, uniform distribution, and improved stability of magnetic properties

Inactive Publication Date: 2018-12-07
沈阳金纳新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this patent, like the traditional vacuum induction melting method, does not really realize the importance of the contact between the melt and the vacuum area in vacuum induction melting, and the vacuum energy has important changes in the deep microstructure of the melt

Method used

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  • Vacuum reaction intensity refining method and application of vacuum reaction intensity refining method to prepare nickel-based and iron-based alloys
  • Vacuum reaction intensity refining method and application of vacuum reaction intensity refining method to prepare nickel-based and iron-based alloys
  • Vacuum reaction intensity refining method and application of vacuum reaction intensity refining method to prepare nickel-based and iron-based alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Taking the nickel-based superalloy Inconel 718 for aero-engine as an example, the implementation details of the vacuum reaction intensity refining method are illustrated.

[0040] Inconel 718 chemical composition percentage: C 0.045 max, Ti 0.80 ~ 1.15, Mn 0.35 max., Fe balance, P 0.010 max., Al 0.40 ~ 0.60, S 0.010 max., Mo 2.80 ~ 3.30, Si 0.35 max., Co 1.00 max., Ni 50. 0~55.0, Cu 0.230 max., Cr 17.0~21.0, B 0.0060max. (60ppm), Pb 0.0010 max. (10 ppm), Bi 0.00005 max. (0.5 ppm), Se0.0005 max. (5 ppm), Mg0.0060 max. (60 ppm), Ca 0.003 max. (30 ppm), Cb (Nb) + Ta 4.87~5.20.

[0041] Vacuum induction melting furnace adopts 3 tons (capacity) German VIDP400 type, with three-phase magnetic stirring function, and the ultimate vacuum degree is 10 -2 Pa. About the vacuum induction melting furnace, please refer to figure 1 , The outer peripheral wall of the furnace body 1 is arranged in sequence from top to bottom with three sets of induction coils, namely l1, l2, l3. see ...

Embodiment 2

[0049] Taking the iron-based superalloy A286 for aero-engine fasteners as an example, the implementation details of the vacuum reaction intensity refining method are illustrated.

[0050] A286 chemical composition percentage: C 0.08 max, Ti 1.9 ~ 2.35, Mn 0.35 max. Fe balance, P0.010 max. Al 0.1 ~ 0.35, S 0.002 max. Mo 1 ~ 1.50, Si 0.35 max. V 0.1 ~ 0.50, Ni24. 0~27.0, Cu 0.30 max. Cr 13.5~16.0, B 0.003~0.010, Pb 0.0010 max. , Bi0.00003 max. (0.3 ppm), Se 0.0005 max. (5 ppm), Mg 0.005 max. (50 ppm), Ca 0.004max. (40 ppm), O 20 ppm max, N50ppm.

[0051] A286 is an iron-based alloy, and the vacuum reaction refining temperature is 1550°C to 1650°C.

[0052] Vacuum induction melting furnace adopts 3 tons of German VIDP400 type, with three-phase magnetic stirring function, and the ultimate vacuum degree is 10 - 2 Pa, vacuum stirring cycle density value = 1 cycle / min.

[0053] The melting amount is 3 tons, the vacuum reaction incubation time is 50 minutes in total; the vacuum re...

Embodiment 3

[0058] Taking the American Standard wear-resistant high-chromium cast iron F45009 as an example to illustrate the implementation details of the vacuum reaction intensity refining method.

[0059] F45009 chemical composition percentage: C 2.0-3.3, Mn 2.0max., Fe balance, P 0.10 max., S0.060max., Mo 3 max, Si 1.5 max., Ni 2.5 max, Cu 1.2 max., Cr 23 ~ 30.

[0060] F45009 is an iron-based alloy, and its vacuum reaction refining temperature is 1550°C to 1650°C.

[0061] The vacuum induction melting furnace is a 3-ton German VIDP400 type, with three-phase magnetic stirring function, and the ultimate vacuum degree is 10 - 2 Pa, vacuum stirring cycle density value = 1 cycle / min.

[0062] The melting amount is 3 tons, the vacuum reaction incubation time is 40 minutes in total; the vacuum reaction intensity is 55 weeks, the vacuum cycle reaction time = vacuum reaction intensity value ÷ vacuum stirring cycle density value = 55 weeks ÷ 1 week / min = 55 minutes.

[0063] Determine the ...

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Abstract

The invention relates to a vacuum reaction intensity refining method and application of the vacuum reaction intensity refining method to prepare nickel-based and iron-based alloys. The vacuum reactionintensity refining method is technically characterized in that raw materials are thrown into a vacuum induction smelting furnace with a magnetic stirring function to be smelted, in the smelting process, melt generates the complete circulation in the vertical direction, in other words, the melt at the bottom of a furnace body is rapidly overturned to the top, accordingly, all atomic groups of themelt in the furnace circularly make contact with the upper vacuum face of the furnace body, and the melt is refined through enough vacuum reaction intensity. Through vacuum energy, an alloy deep-layermicrostructure is changed, the conventional alloy performance extreme is broken through, the vacuum induction smelting furnace prepares high-end nickel-based alloy and iron-based alloy materials through the vacuum reaction intensity refining method, and accordingly the strict requirements of the high-end alloy materials for the service life, deformation recovery precision, performance attenuation, corrosion resistance, magnetism and the like are met.

Description

technical field [0001] The invention relates to a refining method for non-ferrous metal alloys, in particular to a vacuum reaction intensity refining method and its application in the preparation of nickel-based iron-based alloys. By controlling the vacuum reaction intensity of a vacuum induction melting furnace, nickel or nickel alloys or iron alloys can be realized Vacuum induction refining method. Background technique [0002] Vacuum induction melting is an important means to prepare superalloys, corrosion-resistant alloys, precision alloys and high-end special steels. The conventional vacuum induction refining process realizes deoxidation and degassing of alloys by focusing on the combination of process parameters such as vacuum degree, refining temperature, and refining time. , Purify and isolate pollution. However, for microstructure control, deep deoxidation, liquid phase transformation, alloy element segregation control, alloy element metal bond strength, etc. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/04C22B4/06C22C1/02C22C33/04
CPCC22B4/06C22B9/04C22C1/023C22C33/04Y02P10/25
Inventor 李洪锡张湃
Owner 沈阳金纳新材料股份有限公司
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