High-strength difficult-to-deform 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: 2022-03-18
宝武特种冶金有限公司
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  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • High-strength difficult-to-deform nickel-based superalloy and preparation method thereof
  • High-strength difficult-to-deform nickel-based superalloy and preparation method thereof
  • High-strength difficult-to-deform nickel-based superalloy and preparation method thereof

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preparation example Construction

[0047] The above-mentioned high-strength and difficult-to-deform nickel-based superalloy adopts the following preparation method, including the following steps:

[0048] S1, Vacuum induction smelting, batching according to the above element ratio, adding Ni, Cr, Co, W, Mo, C into the induction furnace, under the conditions of vacuum degree ≤ 2.7Pa, power 300 ~ 600KW, complete melting Afterwards, refine for 30-60 minutes under the conditions of power 600-800KW and refining temperature 1520-1580°C; then reduce the power to 200-600KW and lower the temperature of molten steel to 1470-1520°C, then add Ti, Al, Nb, Ta , Zr, and B are alloyed and smelted to obtain molten steel. The measured elements in molten steel satisfy 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: 1.0~2.0%, Ta: 0.3~1.0%, Mo: 1.0~3.0%, W: 7.0~9.0%, B: 0.004~0.01%, Zr: 0.05~0.11%, after charging 10000Pa Ar Gas, after adding Y, continue to smelt for 5-10 minutes under the power of 2...

Embodiment 1

[0059]S1, vacuum induction smelting, using selected high-purity raw materials as alloy raw materials and mixing them according to the ratio of the above elements. It is necessary to ensure that the surface of the alloy raw materials is derusted, clean and free of oil, etc., and special attention should be paid to Si, Mn, Cu Substituting C into the upper limit; put Ni, Cr, Co, W, Mo, C into the induction furnace, and carry out the material under the conditions of vacuum degree ≤ 2.7Pa and power of 300 ~ 600KW. After complete melting, the power is 600 ~800KW, refining temperature is 1520℃ for 30min; then reduce the power to 200~600KW, reduce the molten steel temperature to 1480℃, add Ti, Al, Nb, Ta, Zr, B for alloying and smelting to obtain molten steel, It is measured that molten steel satisfies 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 ra...

Embodiment 2

[0069] S1, vacuum induction smelting, using selected high-purity raw materials as alloy raw materials and mixing them according to the ratio of the above elements. It is necessary to ensure that the surface of the alloy raw materials is derusted, clean and free of oil, etc., and special attention should be paid to Si, Mn, Cu Substituting C into the upper limit; put Ni, Cr, Co, W, Mo, C into the induction furnace, and carry out the material under the conditions of vacuum degree ≤ 2.7Pa and power of 300 ~ 600KW. After complete melting, the power is 600 ~800KW, refining temperature 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...

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Abstract

According to the high-strength and difficult-to-deform nickel-based superalloy and the preparation method thereof, the feasibility of engineering application of the high-strength and difficult-to-deform nickel-based superalloy is guaranteed by optimizing alloy components, adopting the processes of vacuum induction smelting, electroslag remelting, vacuum consumable remelting, forging, heat treatment and the like and controlling the process parameters of all the processes; the high-strength difficult-to-deform nickel-based superalloy with high strength, high structure stability and better hot working performance is prepared, the tensile strength and durability of the high-strength difficult-to-deform nickel-based superalloy at 650 DEG C are superior to those of a GH4169 alloy, the tensile strength and durability of the high-strength difficult-to-deform nickel-based superalloy at 750 DEG C are superior to those of a GH738 alloy, the use temperature reaches 700 DEG C or above, and the high-strength difficult-to-deform nickel-based superalloy is expected to become an alternative material of a superalloy for a next

Description

technical field [0001] The invention relates to the 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 a certain stress at temperatures above 600°C and have oxidation resistance and corrosion resistance; the performance of superalloys depends on the alloy composition and manufacturing process system, among which high temperature strength, structural stability, oxidation resistance Corrosion performance is the most important performance of superalloys, which ultimately depends on the microstructure of the finished steel; according to the substrate, it can be divided into iron-based, nickel-based and cobalt-based, of which nickel-based superalloys are characterized by their excellent oxidation resistance and corrosion resistance. Due to its high high temperature strength, it ...

Claims

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Application Information

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Patent Type & Authority Applications(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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