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High-toughness corrosion-resistant Fe-rich Si-containing multi-component alloy as well as preparation method and application thereof

A multi-component, corrosion-resistant technology, applied in the field of metal materials, can solve the problems of poor resistance to chloride ion erosion, low room temperature strength, poor corrosion resistance, etc., to achieve high tensile strength, high yield strength, superior resistance Effect of Chloride Ion Erosion Properties

Active Publication Date: 2022-05-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, Co 20 Cr 20 Fe 20 mn 20 Ni 20 Many high-entropy alloys (or multi-component alloys) with good plasticity have poor corrosion resistance, and their resistance to chloride ion erosion is poor.
Moreover, its room temperature strength is low, and the yield is generally below 350MPa [F.Otto, A.Dlouhy, Ch.Somsen, H.Bei, G.Eggeler, E.P.George, Acta Materialia 61(2013) 5743-5755]

Method used

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  • High-toughness corrosion-resistant Fe-rich Si-containing multi-component alloy as well as preparation method and application thereof
  • High-toughness corrosion-resistant Fe-rich Si-containing multi-component alloy as well as preparation method and application thereof
  • High-toughness corrosion-resistant Fe-rich Si-containing multi-component alloy as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) According to the chemical formula Fe 34 Ni 21 Cr 20 co 20 Si 5 (atomic percentage) for batching, the raw materials use blocks corresponding to each pure element (purity>99.9%), after cleaning, smelting is carried out under argon gas conditions, and the smelting is repeated 4 times. During smelting, the argon pressure is about 400Pa, the smelting temperature is about 1700°C, and the temperature is kept for 10 minutes.

[0047] (2) After the smelted alloy ingot is obtained, the alloy is subjected to multi-pass hot rolling treatment, the hot rolling temperature is 1000° C., the single rolling reduction is 15%, and the total rolling reduction is 60%.

[0048] (3) Perform high-temperature homogenization treatment on the hot-rolled alloy block in a vacuum environment (atmospheric pressure of about 2 Pa), at a temperature of 1180° C., and a homogenization treatment time of 3 hours, followed by water quenching.

[0049] (4) The alloy block homogenized at high temperatu...

Embodiment 2

[0057] (1) According to the chemical formula Fe 33.8 Ni 19 Cr 19.2 co 20 Si 8 (atomic percentage) for batching, the raw materials use blocks corresponding to each element (purity>99.9%), after cleaning, smelting is carried out under argon gas conditions, and the smelting is repeated 4 times. During smelting, the argon pressure is about 400Pa, the smelting temperature is about 1700°C, and the temperature is kept for 10 minutes.

[0058] (2) The smelted alloy ingot is subjected to multi-pass hot rolling treatment, the hot rolling temperature is 1100°C, the single-pass rolling reduction is 10%, and the total rolling reduction is 50%.

[0059] (3) The hot-rolled alloy block is subjected to high-temperature homogenization treatment in a near-vacuum environment (atmospheric pressure of about 2Pa), the temperature is 1180°C, the homogenization treatment time is 2 hours, and then water quenched.

[0060] (4) The alloy block homogenized at high temperature is subjected to multi-pa...

Embodiment 3

[0068] (1) Use pure element particles (Fe, Ni, Cr, Co, Si) with a purity of 99.9% as raw materials, according to the chemical formula Fe 30 Ni 20 Cr 19 co 21 Si 10 (atomic percentage) for batching, after the raw materials are prepared, melt in a vacuum electric arc furnace, repeat the melting for 5 times, fill in a small amount of argon gas during melting, keep the pressure at about 400Pa, melt at about 1800°C, and keep warm for 20 minutes.

[0069] (2) The smelted alloy ingot is subjected to multi-pass hot rolling treatment, the hot rolling temperature is 1100° C., the single rolling reduction is 15%, and the total rolling reduction is 60%.

[0070] (3) The hot-rolled alloy block is subjected to a high-temperature homogenization treatment (atmospheric pressure of about 2Pa) in a near-vacuum environment, the temperature is 1200°C, the homogenization treatment time is 3 hours, and then water quenched.

[0071] (4) The high-temperature homogenized alloy block is subjected to...

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Abstract

The invention discloses a high-toughness corrosion-resistant Fe-rich Si-containing multi-component alloy and a preparation method and application thereof, and the Fe-rich Si-containing multi-component alloy comprises the following components in percentage by atom: 27-35% of Fe, 17-22% of Ni, 17-22% of Cr, 17-22% of Co and 3-15% of Si. Wherein the sum of the atomic percentage contents of Fe, Ni, Cr and Co is greater than or equal to 85%; the sum of the atom percentage contents of all the components is 100%. The Fe-rich Si-containing multi-component alloy prepared through the method has the tissue characteristic that a face-centered cubic structure serves as a matrix, high strength and plasticity are shown, and meanwhile excellent corrosion resistance is achieved; the Fe-rich Si-containing multi-component alloy can be applied to structural parts serving in a corrosive environment, and the problems that a large number of existing corrosion-resistant alloys for engineering structures are low in strength and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-strength, toughness, and corrosion-resistant Fe-rich and Si-containing multi-component alloy, a preparation method and application thereof. Background technique [0002] With the development of many fields such as petroleum, chemical industry, and national defense, the performance requirements of these engineering structural materials are getting higher and higher, and traditional materials cannot meet the requirements of some key equipment gradually. Some key engineering equipment materials not only need to have superior corrosion resistance, but also have good mechanical properties, such as good strength and toughness. The development of high-strength and corrosion-resistant structural materials can prolong the service life of components, reduce resource consumption, and ensure the safety of engineering components in more severe service environments. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/03C22F1/00
CPCC22C30/00C22C1/03C22F1/00
Inventor 李志明伍鹏飞严定舜甘科夫张勇
Owner CENT SOUTH UNIV