Nickel-based high-temperature alloy and preparation method thereof
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A technology of nickel-based superalloy, mass percentage content, applied in the field of alloy smelting
Active Publication Date: 2022-03-01
ZHEJIANG DALONG ALLOY STEEL
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[0004] But at present, the tensile strength and specified plastic elon
Method used
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preparation example Construction
[0037] The present invention also provides a method for preparing the nickel-based superalloy described in the above technical solution, comprising the following steps:
[0038] The alloy raw materials are subjected to rough refining, refining, VODC method degassing and pouring in sequence to obtain steel ingots;
[0039] Annealing the steel ingot to obtain the nickel-based superalloy.
[0040] In the invention, alloy raw materials are sequentially subjected to rough refining, refining, VODC method degassing and pouring to obtain steel ingots.
[0041] In the present invention, the rough smelting preferably includes EAF electric arc furnace rough smelting; the EAF electric arc furnace rough smelting preferably includes melting, oxidation and reduction in sequence.
[0042] In the present invention, the melting power is preferably 4800-5000 kV·A, more preferably 4900 kV·A; the temperature is preferably ≥1620°C, more preferably 1620-1700°C. In the present invention, the mass p...
Embodiment 1
[0059] The ratio of raw materials is C 0.07%, Si 0.6%, Mn 1.15%, P 0.05%, S 0.01%, Cr 20.0%, Ni31.0%, Cu 0.25%, Al 0.22%, Ti 0.25%, and the balance is Fe raw material.
[0060] Preparation methods include:
[0061] Weigh the alloy raw material according to the above composition, place it in the EAF electric arc furnace for rough smelting in the EAF electric arc furnace; melting stage: the power is 4800KV·A, the temperature is 1620°C, the mass content of P in the system to be melted is ≤0.004%, and the oxidation stage is carried out ; The power in the oxidation stage is 4500KV·A, the temperature is 1650°C, the mass percentage of C in the system to be oxidized is ≤0.15%, and it enters the reduction stage; the power in the reduction stage is 4500KV·A, and the temperature is 1650°C; the system to be reduced The medium slag (FeO) is about 5%, S≤0.005%, and then enters the LF refining furnace for refining in the LF refining furnace; the conditions for refining in the LF refining fu...
Embodiment 2
[0064] The ratio of raw materials is: C 0.07%, Si 0.42%, Mn 1.0%, P 0.06%, S 0.02%, Cr 19.0%, Ni32%, Cu 0.15%, Al 0.25%, Ti 0.28%, and the balance Fe.
[0065] The preparation method is the same as in Example 1.
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Abstract
The invention belongs to the technical field of alloy preparation, and provides a nickel-based high-temperature alloy and a preparation method thereof. The nickel-based high-temperature alloy comprises the following components in percentage by mass: 0.07-0.10% of C, 0 < Si < = 1.00%, 0 < Mn < = 1.50%, less than or equal to 0.020% of P, less than or equal to 0.005% of S, 19.0-23.0% of Cr, 31.0-34.5% of Ni, 0 < Cu < = 0.75%, 0.15-0.60% of Al, 0.15-0.60% of Ti and the balance of Fe. The mass percentage content of Ni is adjusted to 31.0-34.5%, meanwhile, P is controlled to be smaller than or equal to 0.020%, S is controlled to be smaller than or equal to 0.005%, and the mechanical property is improved. The embodiment shows that the tensile strength of the obtained nickel-based high-temperature alloy is larger than or equal to 460 MPa, the specified plastic extension strength is larger than or equal to 180 MPa, and the section elongation is larger than or equal to 35%.
Description
technical field [0001] The invention relates to the technical field of alloy smelting, in particular to a nickel-based superalloy and a preparation method thereof. Background technique [0002] The steel for solar monocrystalline silicon reactor mainly refers to the materials suitable for the manufacture of auxiliary chambers, furnace covers, furnace cylinders, pipes, etc. of monocrystalline silicon reactors to support the basic structure of the reactor. The temperature of silicon single crystal production is high, and it is necessary to prevent the material volatilization of the single crystal furnace shell from affecting the purity of silicon single crystal. The interlayer of the single crystal furnace shell needs to be cooled by cooling water, so it is also necessary to prevent the cooling water from affecting the single crystal. Corrosion of the furnace chamber shell. Austenitic stainless steel not only has excellent corrosion resistance, plasticity, high temperature re...
Claims
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