A kind of high-strength refractory nickel-based superalloy and preparation method thereof

A nickel-based superalloy, hard-to-deform technology, applied in the field of preparation of nickel-based superalloys, can solve the problems of high Co content, high alloy manufacturing costs, etc., to achieve the effect of improving bonding force, excellent durability, and improving temperature bearing capacity

Active Publication Date: 2022-07-15
宝武特种冶金有限公司
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Problems solved by technology

The mass percentages of the main elements of the high-strength nickel-based deformed superalloy are: Cr: 10.0% to 25.0%; Co: 10.0% to 20.0%; Mo: 0.1% to 6.0%; W: 0.1% to 6.0%; Al: 0.1 %~6.0%; Ti: 0.1%~6.0%; Nb: 0.05%~1.5%; Fe: 0.1%~2.0%; C: 0.001%~0.10%; B: 0.001%~0.05%; Zr: 0.01%~ 0.1%; Ce: 0.001% ~ 0.10%; Mg: 0.001% ~ 0.10%; Hf: 0.01% ~ 0.5%; Slag remelting + vacuum self-consumption remelting to obtain high-purity ingots, perform high-temperature diffusion and uniform annealing on the ingots in the range of 1170°C to 1190°C, heat the annealed ingots to 1130°C to 1160°C, and keep them warm for 2 hours ~4h, forge the required bar with a fast forging machine and heat-treat the bar sample to obtain the alloy material that meets the requirements of the design of the present invention; but because the Co content in the high-strength nickel-based deformed superalloy is relatively high, This alloy is expensive to manufacture

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  • A kind of high-strength refractory nickel-based superalloy and preparation method thereof
  • A kind of high-strength refractory nickel-based superalloy and preparation method thereof
  • A kind of high-strength refractory nickel-based superalloy and preparation method thereof

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preparation example Construction

[0047] The above-mentioned high-strength refractory nickel-based superalloy adopts the following preparation method, comprising the following steps:

[0048] S1, vacuum induction smelting, batching is carried out according to the above element ratio, Ni, Cr, Co, W, Mo, C are added to the induction furnace, and the material is smelted under the conditions of vacuum degree ≤2.7Pa and power of 300-600KW, and full melting After refining, the power is 600-800KW and the refining temperature is 1520-1580℃ for 30-60min; then reduce the power to 200-600KW, lower the molten steel temperature to 1470-1520℃, add Ti, Al, Nb, Ta , Zr and B are alloyed and smelted to obtain molten steel. The measured elements in molten steel meet the requirements of C: 0.005-0.02%, Cr: 15.0-19.0%, Co: 8.0-11.0%, Al: 1.0-2.0%, Ti: 3.0- 4.0%, Nb: 1.0 to 2.0%, Ta: 0.3 to 1.0%, Mo: 1.0 to 3.0%, W: 7.0 to 9.0%, B: 0.004 to 0.01%, Zr: 0.05 to 0.11%, and then charged with 10000Pa Ar After adding Y, continue smelti...

Embodiment 1

[0059]S1, vacuum induction smelting, using selected high-purity raw materials as alloy raw materials and ingredients according to the above element ratio, to ensure that the surface of the alloy raw material block is derusted, clean and free of oil pollution, etc., special attention should be paid to Si, Mn, Cu Substitute C according to the upper limit; add Ni, Cr, Co, W, Mo, and C to the induction furnace, and carry out chemical mixing under the conditions of vacuum degree ≤2.7Pa and power of 300-600KW. After full melting, the power is 600 ~800KW and refining temperature of 1520℃ for 30min; then reduce the power to 200~600KW, reduce the temperature of molten steel to 1480℃, add Ti, Al, Nb, Ta, Zr, B for alloying and smelting to obtain molten steel, Measured in molten steel to satisfy C: 0.010%, Cr: 18.1%, Co: 10.0%, Mo: 2.60%, W: 8.2%, Al: 1.3%, Ti: 3.3%, Nb: 1.5%, Ta: 0.5%, B: 0.005%, Zr: 0.06%, the content of each element in the molten steel is within the index range of hig...

Embodiment 2

[0069] S1, vacuum induction smelting, using selected high-purity raw materials as alloy raw materials and ingredients according to the above element ratio, to ensure that the surface of the alloy raw material block is derusted, clean and free of oil pollution, etc., special attention should be paid to Si, Mn, Cu Substitute C according to the upper limit; add Ni, Cr, Co, W, Mo, and C to the induction furnace, and carry out chemical mixing under the conditions of vacuum degree ≤2.7Pa and power of 300-600KW. After full melting, the power is 600 ~800KW and refining temperature of 1540℃ for 45min; then reduce the power to 200~600KW, lower the molten steel temperature to 1500℃, add Ti, Al, Nb, Ta, Zr, B for alloying and smelting to obtain molten steel, The measured element content in molten steel satisfies C: 0.012%, Cr: 16.9%, Co: 9.6%, Mo: 2.50%, W: 7.9%, Al: 1.5%, Ti: 3.2%, Nb: 1.4%, Ta: 0.8 %, B: 0.006%, Zr: 0.05%, the content of each element in the molten steel is within the in...

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Abstract

The invention discloses a high-strength refractory nickel-based superalloy and a preparation method thereof. By optimizing the alloy composition, vacuum induction smelting, electroslag remelting, vacuum consumable remelting, forging and heat treatment are adopted, and the processes of each process are controlled. The parameters ensure the feasibility of the engineering application of the high-strength refractory nickel-based superalloy, so as to obtain a high-strength refractory nickel-based superalloy with high strength, high microstructure stability and good hot workability. , its tensile strength and durability at 650 °C are better than those of GH4169 alloy, and its tensile strength and durability at 750 °C are better than those of GH738 alloy.

Description

technical field [0001] The invention relates to a preparation technology of a nickel-based superalloy, in particular to a high-strength and difficult-to-deform nickel-based superalloy and a preparation method thereof. Background technique [0002] Superalloys refer to a class of alloys that can withstand certain stress at temperatures above 600 °C and have oxidation resistance and corrosion resistance; the performance of superalloys depends on alloy composition and manufacturing process system, including high temperature strength, microstructure stability, oxidation resistance. Corrosion performance is the most important performance of superalloys, which is ultimately determined by the microstructural state of the finished steel; according to the matrix, it can be divided into iron-based, nickel-based and cobalt-based, among which nickel-based superalloys have excellent oxidation corrosion resistance and High high temperature strength is widely used in aerospace engines, gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C1/02C22F1/10
CPCC22C19/056C22C1/023C22F1/10
Inventor 代朋超马天军赵欣田沛玉王庆增余式昌
Owner 宝武特种冶金有限公司
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