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Nickel-based alloy and preparation method and application thereof

A technology of nickel-based alloys and alloy strips, applied in the field of metallurgy, can solve the problems of insufficient strength and poor plasticity of superalloys, and achieve the effects of less surface cracks, good plasticity, and good resistance to high temperature oxidation.

Active Publication Date: 2022-03-15
北冶功能材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To this end, the present invention provides a nickel-based alloy and its preparation method and application to solve the technical problems of high-temperature alloys such as insufficient strength and poor plasticity faced by CrCoNi medium-entropy alloys

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  • Nickel-based alloy and preparation method and application thereof

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preparation example Construction

[0047] The preparation method of the high-temperature nickel-based alloy strip comprises the following steps:

[0048] Put the raw materials Cr, Co, W, Mo, Fe, Ni and some C raw materials into the crucible of the vacuum induction melting furnace, and then vacuumize it. When the vacuum degree reaches ≤1Pa, heat it with a low power of ≤150KW to discharge the adhering to the furnace material. gas.

[0049] When the vacuum degree reaches ≤0.1Pa, use 200-250KW power to melt the material until the furnace material is completely melted; after the furnace material is completely melted, raise the temperature to 1550-1650°C, and power off after 30-40 minutes of high-temperature refining; heat up with a high power of 240-280KW Break the membrane, add the remaining part of raw material C through the hopper after breaking the membrane, and stir evenly.

[0050] Secondary refining of the alloy: continue to heat up, refining for 4-6 minutes when the temperature of the furnace charge is 1600...

Embodiment 1-3

[0055] The preparation method of the nickel base alloy of present embodiment 1-3 comprises the following steps:

[0056] Dosing according to the composition combinations shown in alloys 1 to 3 in Table 1 respectively, weigh C, Co, Ni, Cr, Mo, W, Fe raw materials respectively, wherein, the raw material Cr is a block with a purity of 99.99%, and the raw material Fe It is in the form of a block with a purity of 99.8%, and the raw material Ni is in the form of a block with a purity of 99.99%.

[0057] Put the raw materials Cr, Co, W, Mo, Fe, Ni and some C raw materials into the crucible of the vacuum induction melting furnace, and then vacuumize it. When the vacuum degree reaches 1Pa, heat it with a low power of 150KW to discharge the gas attached to the furnace material.

[0058] When the vacuum degree reaches 0.1Pa, use 200KW power to melt the material until the furnace material is completely melted; after the furnace material is completely melted, raise the temperature to 1550°...

Embodiment 4-6

[0070] The preparation method of the nickel base alloy of present embodiment 4-6 comprises the following steps:

[0071] According to the ingredients shown in the alloys 4-6 in Table 1, respectively, weigh C, Co, Ni, Cr, Mo, W, Fe raw materials, the raw material Cr is a block with a purity of 99.99%, and the raw material Fe is a purity of 99.8%. The raw material Ni is in the form of a block with a purity of 99.99%.

[0072] Put the raw materials Cr, Co, W, Mo, Fe, Ni and some C raw materials into the crucible of the vacuum induction melting furnace, and then vacuumize it. When the vacuum degree reaches 0.5Pa, heat it with a low power of 100KW to discharge the gas attached to the furnace material. .

[0073] When the vacuum degree reaches 0.05Pa, use 220KW power to melt the material until the furnace material is completely melted; after the furnace material is completely melted, raise the temperature to 1600°C, refine at high temperature for 35 minutes, and then power off the ...

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Abstract

The invention discloses a nickel-based alloy and a preparation method and application thereof, and the nickel-based alloy comprises the following components in percentage by weight: 21.5-25.5% of Cr, 24.5-27.5% of Co, 24.5-27.5% of Ni, 14-17% of Fe, 2.5-4.5% of Mo, 3.5-5.5% of W, 0.08-0.15% of C, and the sum of Mo and W is greater than or equal to 7.5% and less than or equal to 9.5%. The nickel-based alloy prepared through the method is a high-temperature alloy strip with the advantages of being small in density, high in elasticity modulus, resistant to high temperature and abrasion, resistant to high temperature and corrosion, resistant to oxidation, high in strength, high in toughness, easy to machine and form, easy to weld and the like. The nickel-based alloy strip has a reasonable composition proportion, a wide hot working window and a heat treatment system, and the prepared alloy strip has high strength, high elastic modulus and good oxidation resistance and corrosion resistance, and is a candidate material for hot end parts of aero-engines and industrial gas turbines.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a nickel-based alloy and its preparation method and application. Background technique [0002] High-entropy alloy is a new type of alloy material developed in recent years that is different from traditional alloys. It is composed of 5 to 13 main elements, and the constituent elements have equal or approximately equal atomic ratios. After the solidification of multi-principal high-entropy alloys, complex intermetallic compounds will not be formed, but simple FCC or BCC solid solutions will be formed. High-entropy alloys have thermodynamic high-entropy effects, structural lattice distortion effects, kinetic hysteretic diffusion effects, and performance cocktail effects. Utilizing these effects and rationally designing the composition of the alloy, good comprehensive properties such as high hardness, high elasticity, high strength, good wear resistance, corrosion resistance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C19/07C22C19/05C22C1/02C22F1/00C21D8/02C21D1/32
CPCC22C30/00C22C19/07C22C19/055C22C1/02C22F1/10C21D8/0226C21D8/0247C21D8/0236C21D1/32C22C1/023
Inventor 安宁赵文倩李慧威李重阳安杨胡博炜刘杨擎宇牛永吉
Owner 北冶功能材料(江苏)有限公司
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