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A high corrosion-resistant alloy flange and its preparation method

A corrosion-resistant alloy and corrosion-resistant coating technology, applied in flange connection, mechanical equipment, pipeline anti-corrosion/anti-rust protection, etc., can solve problems such as affecting the strength of alloy use

Active Publication Date: 2021-07-06
无锡市星达石化配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al-Zn-Mg alloy is a heat treatment-strengthened high-strength aluminum alloy, which has high strength, large specific modulus, low density, and good corrosion resistance and thermal processing performance. However, the alloy has dynamic recrystallization during thermal processing and solid solution 1. There is recrystallization phenomenon in the alloy during aging treatment, which affects the service strength of the alloy

Method used

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  • A high corrosion-resistant alloy flange and its preparation method
  • A high corrosion-resistant alloy flange and its preparation method
  • A high corrosion-resistant alloy flange and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The high corrosion-resistant alloy flange includes an aluminum alloy substrate and a corrosion-resistant coating; the aluminum alloy substrate is composed of an aluminum-zinc borate whisker reinforcement phase and an Al-Zn-Mg alloy substrate; the corrosion-resistant coating is NiF 2 -TiF 4 -Ni coating.

[0029] The chemical composition of Al-Zn-Mg alloy includes: 5wt% Zn, 2wt% Mg, 1wt% Li, 1wt% Ca, 0.5wt% Cu, 0.1wt% Mo, 0.01wt% Y, 0.01wt% La, the balance is Al.

[0030] The mass ratio of Al-Zn-Mg alloy material to aluminum-zinc borate whiskers is 100:1.

[0031] The aluminum alloy matrix material is prepared by the following method:

[0032]S1. Weigh the raw materials of the Al-Zn-Mg alloy in proportion, melt them in a vacuum induction furnace protected by argon, and keep the alloy liquid at 670°C for 20 minutes;

[0033] S2. Put the powder obtained after pulverizing the aluminum-zinc borate whiskers into a stirring ball mill, fill it with liquid nitrogen, and start...

Embodiment 2

[0040] High corrosion-resistant alloy flanges include aluminum alloy materials and corrosion-resistant coatings, and the corrosion-resistant coatings are NiF 2 -TiF 4 - Ni coating; the aluminum alloy material is composed of aluminum zinc borate whisker reinforcement phase and Al-Zn-Mg alloy matrix.

[0041] The chemical composition of Al-Zn-Mg alloy includes: 12wt% Zn, 5wt% Mg, 3wt% Li, 2wt% Ca, 1.2wt% Cu, 0.2wt% Mo, 0.05wt% Y, 0.03wt% La, the balance is Al.

[0042] The mass ratio of Al-Zn-Mg alloy material to aluminum-zinc borate whiskers is 100:5.

[0043] The aluminum alloy matrix material is prepared by the following method:

[0044] S1. Weigh the raw materials of the Al-Zn-Mg alloy in proportion, melt them in a vacuum induction furnace protected by argon, and keep the alloy liquid at 700°C for 30 minutes;

[0045] S2. Put the powder obtained after pulverizing the aluminum-zinc borate whiskers into a stirring ball mill, fill it with liquid nitrogen, and start ball mil...

Embodiment 3

[0052] High corrosion-resistant alloy flanges include aluminum alloy materials and corrosion-resistant coatings, and the corrosion-resistant coatings are NiF 2 -TiF 4 - Ni coating; the aluminum alloy material is composed of aluminum zinc borate whisker reinforcement phase and Al-Zn-Mg alloy matrix.

[0053] The chemical composition of Al-Zn-Mg alloy includes: 7wt% Zn, 4wt% Mg, 2wt% Li, 2wt% Ca, 1wt% Cu, 0.15wt% Mo, 0.03wt% Y, 0.02wt% La, and the balance is Al .

[0054] The mass ratio of Al-Zn-Mg alloy material to aluminum-zinc borate whiskers is 100:3.

[0055] The aluminum alloy matrix material is prepared by the following method:

[0056] S1. Weigh the raw materials of the Al-Zn-Mg alloy in proportion, melt them in a vacuum induction furnace protected by argon, and keep the alloy liquid at 685°C for 25 minutes;

[0057] S2. Put the powder obtained after pulverizing the aluminum-zinc borate whiskers into a stirring ball mill, fill it with liquid nitrogen, and start ball ...

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Abstract

The invention proposes a high corrosion-resistant alloy flange and a preparation method thereof, including an aluminum alloy material and a corrosion-resistant coating, and the corrosion-resistant coating is NiF 2 ‑TiF 4 ‑Ni coating; the aluminum alloy material is composed of an aluminum zinc borate whisker reinforcement phase and an Al‑Zn‑Mg alloy matrix. The present invention utilizes NiF 2 ‑TiF 4 ‑Ni coating to enhance the corrosion resistance of aluminum alloy, the chemical corrosion resistance of the resulting product has been greatly improved, adding low-cost alloying elements Al and Ca to the Mg‑Li alloy to form Al with a high calcium-aluminum ratio ‑Zn‑Mg alloy, which improves the mechanical and corrosion resistance properties of the alloy.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a highly corrosion-resistant alloy flange. Background technique [0002] The ability of metal materials to resist medium erosion in corrosive grafting is called the corrosion resistance of metals. Metal corrosion is the most harmful spontaneous process in industry. Therefore, the development and application of corrosion-resistant alloys has great social significance and economic value. The current corrosion-resistant alloys mainly include corrosion-resistant stainless steel and nickel-based alloys. Although both corrosion-resistant stainless steel and nickel-based alloys have certain corrosion resistance, as the whole society pursues higher and higher quality, it is necessary to further improve the corrosion resistance. The corrosion resistance of corrosion alloys remains an ongoing topic in industry development. [0003] Many studies have shown that adding trace rare e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/08C22C49/06C22C49/14C22F1/02C22F1/053C25D3/56C25D5/20C25D5/44F16L23/00F16L58/08F16L58/18C22C101/08
CPCC22C47/08C22C49/06C22C49/14C22F1/02C22F1/053C25D3/562C25D5/20C25D5/44F16L23/00F16L58/08F16L58/187
Inventor 费新海费爱华邵德金
Owner 无锡市星达石化配件有限公司
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