A corrosion-resistant high-strength Fe-rich multi-component alloy and preparation method thereof

A multi-component, corrosion-resistant technology, applied in the field of metal materials, can solve problems such as low strength and poor corrosion resistance, and achieve the effects of improving corrosion resistance, improving overall performance, and realizing grain refinement

Active Publication Date: 2022-03-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 Fe-rich multi-component alloy material and its preparation method, and solve the problem of low strength and poor corrosion resistance of a large number of existing multi-component alloys. technical problem

Method used

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  • A corrosion-resistant high-strength Fe-rich multi-component alloy and preparation method thereof
  • A corrosion-resistant high-strength Fe-rich multi-component alloy and preparation method thereof
  • A corrosion-resistant high-strength Fe-rich multi-component alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to the chemical formula Fe 35 Ni 20 Cr 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 4 times. During melting, the vacuum degree is 0.01 Pa, the melting temperature is 1600°C, and the temperature is kept for 10 minutes.

[0055] After obtaining the smelted alloy ingot, the alloy is subjected to multi-pass hot rolling treatment. The hot rolling temperature is 900°C, the single rolling reduction is 10%, and the total rolling reduction is 50%.

[0056] The hot-rolled alloy block is subjected to high-temperature homogenization treatment in an argon protective atmosphere (argon pressure is 10 Pa), the temperature is 1200° C., the homogenization treatment time is 2 hours, and then water quenching.

[0057] The alloy block homogenized at high temperature is subjected to multi-pass room temperature c...

Embodiment 2

[0061] According to the chemical formula Fe 35 Ni 20 Cr 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 4 times. During melting, the vacuum degree is 0.01 Pa, the melting temperature is 1600°C, and the temperature is kept for 10 minutes. The smelted alloy ingot is subjected to multi-pass hot rolling treatment, the hot rolling temperature is 1000° C., the single rolling reduction is 10%, and the total rolling reduction is 50%.

[0062]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. Depend on Figure 4 It can be seen that after homogenization treatment, the grain size in the face-centered cubic equiaxed grain struc...

Embodiment 3

[0067] Fe-rich alloys Fe 35.1 Ni 20.1 Cr 19.9 co 19.8 Ti 1 Al 2.5 Cu 1 Si 0.5 (atomic percent), melted under vacuum conditions after preparing the material, repeated melting 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 20 minutes. The smelted alloy ingot 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%.

[0068] The hot-rolled alloy block is subjected to high-temperature homogenization treatment (the pressure of argon gas is about 10 Pa) in an argon protective atmosphere, the temperature is 1200°C, the homogenization treatment time is 4 hours, and then water quenched. The alloy block homogenized at high temperature is subjected to multi-pass room temperature rolling, the single-pass rolling reduction is 15%, and the total rolling reduction is 60%.

[0069] The cold...

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Abstract

A corrosion-resistant, high-strength, Fe-rich multi-component alloy material, comprising the following components by atomic percentage, Fe 30-50%, Ni 5-25%, Cr 5-25%, Co 5-20%, Ti 0.1~2.50%, Al 0.1~3.50%, Cu 0.01~2.50%, Si 0.1~2.50%; and the sum of Fe, Ni, Cr, Co atomic percentage ≥ 90%; Ti, Al, Cu, Si The sum of the atomic percentages is ≤10%; the sum of the atomic percentages of each component is 100%. Its preparation method is to mix the components according to the designed atomic ratio of each component of the alloy, melt them under vacuum or inert gas protection conditions, and pour them after heat preservation to obtain alloy billets; the billets are hot-rolled, homogenized, cooled After rolling and annealing, the Fe-rich multi-component alloy bulk material is obtained. The Fe-rich multi-component alloy matrix prepared by the present invention is characterized by a face-centered cubic structure, which has a good combination of strength and plasticity; at the same time, it has excellent corrosion resistance, and the corrosion dissolution rate in dilute sulfuric acid solution is higher than that of existing CoCrFeMnNi Component alloys are much slower; applicable to structural components serving in corrosive environments.

Description

technical field [0001] The invention relates to a corrosion-resistant, high-strength and tough Fe-rich multi-component alloy material and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] A large number of corrosion-resistant structural materials are used in many industrial sectors such as petroleum, chemical industry, and national defense. These widely used engineering equipment materials not only need to have superior corrosion resistance, but also have good mechanical properties, such as high strength and plasticity. The development of modern industry has higher and higher performance requirements for these engineering structural materials. On the one hand, the corrosion resistance of the corresponding structural materials is required to be more superior. On the other hand, the strength and plasticity also need to be higher, so as to improve energy utilization efficiency and the safety of engineering component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C22C38/52C22C38/50C22C38/06C22C38/42C22C38/34C22C38/02C22F1/00C21D8/00
CPCC22C30/02C22C38/52C22C38/50C22C38/06C22C38/42C22C38/34C22C38/02C22F1/00C21D8/005
Inventor 李志明严定舜甘科夫朱书亚伍鹏飞
Owner CENT SOUTH UNIV
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