Surface modification method of tungsten and aluminum composite material

A composite material and surface modification technology, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve problems such as low hardness, low material bonding force, and reduce surface quality, and improve wear resistance and corrosion resistance. , good density effect

Active Publication Date: 2017-05-31
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high content of the aluminum matrix and the low hardness of the W / Al composite material, the surface is often scratched due to various reasons during use, which affects the appearance and surface performance of the material and reduces the surface quality; in a corrosive environment , due to the different electrode potentials of additives such as tungsten and the aluminum substrate, the material shows a strong tendency of electrochemical corrosion and poor corrosion resistance
The quality of the anti-corrosion coating prepared by conventional aluminum alloy anti-corrosion treatment methods such as anodizing, electroplating and spraying is very poor, and the bonding force with the material is not high, so a good anti-corrosion effect cannot be achieved

Method used

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  • Surface modification method of tungsten and aluminum composite material
  • Surface modification method of tungsten and aluminum composite material
  • Surface modification method of tungsten and aluminum composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for surface modification of a W / Al composite material, specifically comprising the steps of:

[0026] (1) First place the W / 2024Al composite material with a volume percentage of W of 5% in a high-frequency induction heating furnace, and adjust the position of the material in the high-frequency induction heating coil;

[0027] (2) Turn on the power of the equipment, vacuumize the induction heating furnace (less than 0.1Pa) or pass in an inert gas (argon or nitrogen, etc.) to protect the atmosphere;

[0028] (3) Set the frequency of induction heating to 10KHZ, start induction heating, each induction heating time is 5s, and continue the next induction heating after the pause time is greater than 10min, and conduct induction heating for a total of 5 times until the surface heating temperature reaches 600°C , to generate a dense protective layer of tungsten-aluminum intermetallic compound on the surface area of ​​the material.

[0029] According to XRD, SEM and app...

Embodiment 2

[0031] A method for surface modification of a W / Al composite material, specifically comprising the steps of:

[0032] (1) First, place the W / 2024Al composite material with a W volume percentage of 20% in a high-frequency induction heating furnace, and adjust the position of the material in the high-frequency induction heating coil;

[0033] (2) Turn on the power of the equipment, vacuumize the induction heating furnace (less than 0.1Pa) or pass in an inert gas (argon or nitrogen, etc.) to protect the atmosphere;

[0034] (3) Set the frequency of induction heating to 100KHZ, start induction heating, each induction heating time is 5s, and continue the next induction heating after the pause time is greater than 10min, and conduct induction heating for a total of 5 times until the surface heating temperature reaches 700°C , to generate a dense protective layer of tungsten-aluminum intermetallic compound on the surface area of ​​the material.

[0035] According to XRD, SEM and app...

Embodiment 3

[0037] A method for surface modification of a W / Al composite material, specifically comprising the steps of:

[0038] (1) first place the W / Al composite material with a volume percentage of W of 10% in a high-frequency induction heating furnace, and adjust the position of the material in the high-frequency induction heating coil;

[0039] (2) Turn on the power of the equipment, vacuumize the induction heating furnace (less than 0.1Pa) or pass in an inert gas (argon or nitrogen, etc.) to protect the atmosphere;

[0040] (3) Set the frequency of induction heating to 50KHZ, start induction heating, each induction heating time is 5s, and continue the next induction heating after the pause time is greater than 10min, a total of 5 times of induction heating, until the surface heating temperature reaches 600°C , to generate a dense protective layer of tungsten-aluminum intermetallic compound on the surface area of ​​the material.

[0041] According to XRD, SEM and appearance inspect...

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Abstract

The invention belongs to the technical field of surface heat treatment and particularly relates to a surface modification method of a tungsten and aluminum composite material. The tungsten and aluminum composite material is subjected to surface heat treatment through a high-frequency induction heating furnace, a compound protection layer between tungsten and aluminum alloy is formed on the surface of the material, the protection layer is good in density, and obvious holes or cracks do not exist. By means of the modification method, wear resistance and corrosion resistance of the surface of the tungsten and aluminum composite material are improved, and application of the tungsten and aluminum composite material to a complex environment can be met.

Description

technical field [0001] The invention belongs to the technical field of surface heat treatment, and in particular relates to a surface modification method of a tungsten-aluminum composite material. Background technique [0002] Tungsten-aluminum (W / Al) composite material is a kind of aluminum or aluminum alloy (such as 2024, 7075) as the matrix, with W, B 4 C, etc. are aluminum-based composite materials with added phases. This material has high radiation resistance shielding performance, light weight, and good mechanical properties. It has broad application prospects in radiation shielding technology and other fields. [0003] Due to the high content of the aluminum matrix and the low hardness of the W / Al composite material, the surface is often scratched due to various reasons during use, which affects the appearance and surface performance of the material and reduces the surface quality; in a corrosive environment , due to the different electrode potentials of the additive...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F1/18C21D1/74C21D1/10
CPCC21D1/10C21D1/74C22F1/04C22F1/18Y02P10/25
Inventor 马书旺王军锋苟醒梁秋实杨剑刘坤王健杨志民
Owner GRIMAT ENG INST CO LTD
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