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A kind of Ni-rich multi-component alloy with high strength, toughness and corrosion resistance and preparation method thereof

A multi-component, corrosion-resistant technology, applied in the field of metal materials, can solve problems such as poor corrosion resistance and insufficient strength, and achieve the effects of improving strength, corrosion resistance, and solid solution strengthening effect

Active Publication Date: 2022-04-05
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a corrosion-resistant and high-strength Ni-rich multi-component alloy material and its preparation method, and solve the problem of poor corrosion resistance and insufficient strength of a large number of existing multi-component alloys. technical problem

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  • A kind of Ni-rich multi-component alloy with high strength, toughness and corrosion resistance and preparation method thereof
  • A kind of Ni-rich multi-component alloy with high strength, toughness and corrosion resistance and preparation method thereof
  • A kind of Ni-rich multi-component alloy with high strength, toughness and corrosion resistance and preparation method thereof

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preparation example Construction

[0056] The preparation method of this type of high-strength, toughness and corrosion-resistant Ni-rich multi-component alloy material provided by the present invention has the following steps:

[0057] Dosing according to the metering ratio of each component in the above chemical formula (using pure elements or blocks or particles of intermediate alloys as raw materials), and then smelting under vacuum or inert gas protection conditions. In order to ensure the uniformity of the ingredients in the alloy ingot, it is generally necessary to repeat the melting 2 to 4 times.

[0058] After obtaining high-quality alloy ingots, the alloys are hot-rolled. During the hot rolling process, the hot rolling temperature is 750°C-1200°C, the single rolling reduction is less than or equal to 30%, and the total rolling reduction is 30%-80%.

[0059] Homogenize the hot-rolled alloy block at high temperature. The homogenization treatment is carried out under the condition of vacuum or inert ga...

Embodiment 1

[0064] According to the chemical formula Ni 35 Cr 20 Fe 20 co 20 Ti 1 Al 2.5 Cu 1 Si 0.5 (atomic percentage) is carried out batching, and raw material uses the block body corresponding to each pure element, then smelts under vacuum condition, and smelts repeatedly 3 times. During smelting, the vacuum degree is about 0.01 Pa, the melting temperature is about 1700°C, and the temperature is kept for 10 minutes.

[0065] After obtaining the smelted alloy ingot, the alloy is subjected to multi-pass hot rolling treatment. The hot rolling temperature is 950°C, the single rolling reduction is 15%, and the total rolling reduction is 60%.

[0066] The hot-rolled alloy block is subjected to high-temperature homogenization treatment in an argon protective atmosphere (argon pressure is about 10Pa), the temperature is 1200°C, the homogenization treatment time is 3 hours, and then water quenched.

[0067] The high-temperature homogenized alloy block is subjected to multi-pass room t...

Embodiment 2

[0070] According to the chemical formula Ni 35 Cr 20 Fe 20 co 20 Ti 1 Al 2.5 Cu 1 Si 0.5 (atomic percentage) is carried out batching, and raw material uses the block body corresponding to each element, then smelts under vacuum condition, repeats smelting 4 times. During smelting, the vacuum degree is about 0.01 Pa, the melting temperature is about 1700°C, and the temperature is kept for 10 minutes. The smelted alloy ingot is subjected to hot rolling treatment, the hot rolling temperature is 1000°C, the single-pass rolling reduction is 10%, and the total rolling reduction is 50%.

[0071] The hot-rolled alloy block is subjected to high-temperature homogenization treatment in an argon protective atmosphere (argon pressure is about 10Pa), the temperature is 1200°C, the homogenization treatment time is 2 hours, and then water quenched. The alloy block homogenized at high temperature is subjected to multi-pass room temperature cold rolling, the single-pass rolling reduction...

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Abstract

The invention relates to a high-strength, toughness-resistant and corrosion-resistant Ni-rich multi-component alloy material, which comprises the following components by atomic percentage: Ni 25-45%, Cr 5-25%, Fe 5-25%, Co 5-20% , Ti 0.1 to 3.50%, Al 0.1 to 3.50%, Cu 0.01 to 4.50%, Si 0.1 to 3.50%; and the sum of the atomic percentages of Ni, Cr, Fe, Co ≥ 85%; Ti, Al, Cu The sum of the atomic percentages is ≤15%; the sum of the atomic percentages of each component is 100%. Its preparation method is to take each component according to the designed alloy composition, smelt it under the condition of vacuum or inert gas protection, pour it after heat preservation, and obtain the alloy billet; after the billet is hot-rolled, homogenized, cold-rolled and annealed, A Ni-rich multi-component alloy bulk material is obtained. The Ni-rich multi-component alloy prepared by the invention has a face-centered cubic structure as a matrix, exhibits high strength and plasticity, and has excellent corrosion resistance. This kind of Ni-rich multi-component alloy can be applied to structural components serving in corrosive environments, and solves the problems of low strength and poor corrosion resistance of a large number of existing multi-component alloys.

Description

technical field [0001] The invention relates to a Ni-rich multi-component alloy material with high strength, toughness and corrosion resistance and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Corrosion-resistant structural materials are widely used in key equipment in many industrial sectors such as petroleum, chemical industry, and national defense. These key engineering equipment materials not only need to have superior corrosion resistance, but also have good mechanical properties, such as better strength and plasticity. The development of modern industry has higher and higher performance requirements for these engineering structural materials, which not only require the corresponding structural materials to have better corrosion resistance, but also require higher strength and plasticity, so as to improve energy utilization efficiency and ensure engineering components in more stringent conditions. Safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/02C22C1/02C22F1/10C22F1/16
CPCC22C19/058C22C30/02C22C1/02C22C1/023C22F1/10C22F1/16
Inventor 李志明严定舜甘科夫伍鹏飞朱书亚
Owner CENT SOUTH UNIV