Surface powder coating and laser treatment method for improving mechanical performance of tungsten-copper alloy

A tungsten-copper alloy and laser processing technology are applied in the direction of improving energy efficiency, process efficiency, and additive manufacturing. Cost, improvement of strength and plastic deformation ability, effect of preventing crack initiation and propagation

Active Publication Date: 2019-10-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of ultrafine crystal or nanocrystalline powder obtained by the above method is small, and its output is difficult to meet the use requirements for medium/large components in th

Method used

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  • Surface powder coating and laser treatment method for improving mechanical performance of tungsten-copper alloy
  • Surface powder coating and laser treatment method for improving mechanical performance of tungsten-copper alloy
  • Surface powder coating and laser treatment method for improving mechanical performance of tungsten-copper alloy

Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Step 1. Mixing ultrafine / nanocrystalline powder

[0030] Ultra-fine crystalline or nanocrystalline tungsten powder and copper powder are mixed to obtain ultra-fine crystalline / nanocrystalline tungsten copper powder; the above-mentioned mixed powder is composed of 30% tungsten and 70% copper respectively according to mass percentage;

[0031] Step 2, powder coating on the surface

[0032] Place the tungsten-copper alloy on the substrate of the workbench of the selected laser melting equipment, and then cover the surface of the tungsten-copper alloy with the ultrafine / nanocrystalline tungsten-copper powder obtained in step 1 with a thickness of 10nm. Close the hatch and vacuum After filling with argon;

[0033] Step 3. Laser processing

[0034] Scan the ultra-fine / nanocrystalline tungsten copper powder coated in step 2 with the laser beam of the selected laser melting equipment. The specific laser surface treatment parameters are: laser power 20W, scanning speed ...

Example Embodiment

[0035] Example 2

[0036] Step 1. Mixing ultrafine / nanocrystalline powder

[0037] Ultra-fine crystalline or nanocrystalline tungsten powder and copper powder are mixed to obtain ultra-fine crystalline / nanocrystalline tungsten copper powder; the above-mentioned mixed powder is composed of 95% tungsten and 5% copper according to mass percentages.

[0038] Step 2, powder coating on the surface

[0039] Place the tungsten copper alloy on the substrate of the workbench of the selected laser melting equipment, and then cover the surface of the tungsten copper alloy with the ultrafine / nanocrystalline tungsten copper powder obtained in step 1 with a thickness of 500μm. Close the hatch to vacuum Then fill with nitrogen.

[0040] Step 3. Laser processing

[0041] Scan the ultrafine / nanocrystalline tungsten copper powder coated in step 2 with the laser beam of the selective laser melting equipment. The specific laser surface treatment parameters are: laser power 1000W, scanning speed 1500mm / s, sc...

Example Embodiment

[0042] Example 3

[0043] Step 1. Mixing ultrafine / nanocrystalline powder

[0044] Ultra-fine crystalline or nanocrystalline tungsten powder and copper powder are mixed to obtain ultra-fine crystalline / nanocrystalline tungsten copper powder; the above-mentioned mixed powder is composed of 50% tungsten and 50% copper respectively according to mass percentage.

[0045] Step 2, powder coating on the surface

[0046] Place the tungsten-copper alloy on the substrate of the workbench of the selective laser melting equipment, and then cover the surface of the tungsten-copper alloy with the ultra-fine / nanocrystalline tungsten-copper powder obtained in step 1 with a thickness of 100μm. Close the hatch to vacuum After filling with argon gas.

[0047] Step 3. Laser processing

[0048] Scan the ultrafine / nanocrystalline tungsten copper powder coated in step 2 with the laser beam of the selective laser melting equipment. The specific laser surface treatment parameters are: laser power 500W, scanning...

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Abstract

A surface powder coating and laser treatment method for improving the mechanical performance of a tungsten-copper alloy comprises the following steps that firstly, after ultra-fine crystal or nanometer crystal tungsten powder and ultra-fine crystal or nanometer crystal copper powder are mixed, ultra-fine crystal or nanometer crystal tungsten-copper powder is obtained; secondly, the tungsten-copperalloy is arranged on a base plate of a workbench of a selective laser melting device, the ultra-fine crystal or nanometer crystal tungsten-copper powder obtained in the step 1 covers the surface of the tungsten-copper alloy for a layer, and after a cabin door is closed and vacuumizing is conducted, argon or nitrogen or other inert gas is fed; thirdly, the ultra-fine crystal or nanometer crystal tungsten-copper powder coated in the step 2 is scanned by a laser beam of the selective laser melting device, the powder laser sintering or melting process is completed, after the alloy is cooled, theneeded material can be obtained after being taken out from a work chamber of the selective laser melting device. The surface powder coating and laser treatment method significantly improves the mechanical performance of the tungsten-copper alloy.

Description

technical field [0001] The invention belongs to the technical field of composite material modification, and in particular relates to a powder-coated laser treatment method for improving the mechanical properties of tungsten-copper alloys. Background technique [0002] Tungsten-copper alloy combines the advantages of metal tungsten and copper, among which tungsten has high melting point, high density, and copper has excellent electrical and thermal conductivity. Therefore, tungsten-copper alloy is widely used in military high-temperature resistant materials, high-voltage switch electrical alloys, electrical processing electrodes, microelectronic Materials, as parts and components, are widely used in aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and other industries. With the continuous progress and development of technologies in the above fields, the performance of tungsten-copper alloys is currently facing more stringent requiremen...

Claims

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Application Information

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IPC IPC(8): C22C27/04B22F3/105B22F7/04
CPCC22C27/04B22F7/04B22F10/00B22F10/37B22F10/34B22F10/28B22F10/36B22F10/366B22F10/32Y02P10/25
Inventor 卓龙超张俊璐尹恩怀赵昭罗斌张一恒梁淑华张慧刘冬雪王海亮
Owner XIAN UNIV OF TECH
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