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A surface coating laser treatment method for improving the mechanical properties of tungsten-copper alloy

A tungsten-copper alloy and laser processing technology, which is applied in the direction of improving energy efficiency, process efficiency, additive manufacturing, etc., can solve problems such as cost increase, small amount of ultra-fine crystal or nanocrystalline powder, and limited popularization and application, so as to prevent Effects of crack initiation and propagation, low cost, increased strength and plastic deformation capacity

Active Publication Date: 2021-05-18
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 the field of engineering applications; moreover, the cost of ultrafine crystal or nanocrystalline powder is lower than that of micron powder Greatly improved, limiting its promotion and application

Method used

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  • A surface coating laser treatment method for improving the mechanical properties of tungsten-copper alloy
  • A surface coating laser treatment method for improving the mechanical properties of tungsten-copper alloy
  • A surface coating laser treatment method for improving the mechanical properties of tungsten-copper alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1, mixing ultrafine / nanocrystalline powder

[0030] The ultrafine crystal or nanocrystalline tungsten powder is mixed with copper powder to obtain ultrafine crystal / nanocrystalline tungsten copper powder; the above mixed powder is composed of 30% tungsten and 70% copper respectively by mass percentage;

[0031] Step 2, powder the surface

[0032] Place the tungsten-copper alloy on the substrate of the selective laser melting equipment workbench, then cover the surface of the tungsten-copper alloy with the ultra-fine crystal / nanocrystalline tungsten-copper powder obtained in step 1, with a thickness of 10nm, close the hatch and vacuumize After filling with argon;

[0033] Step 3, Laser Treatment

[0034] Scan the ultra-fine crystal / nanocrystalline tungsten copper powder coated in step 2 by the laser beam of the selective laser melting equipment. The specific laser surface treatment parameters are: laser power 20W, scanning speed 50mm / s, scanning distance 0.01mm, a...

Embodiment 2

[0036] Step 1, mixing ultrafine / nanocrystalline powder

[0037] Ultrafine crystal or nanocrystalline tungsten powder is mixed with copper powder to obtain ultrafine crystal / nanocrystalline tungsten copper powder; the above mixed powder is composed of 95% tungsten and 5% copper respectively by mass percentage.

[0038] Step 2, powder the surface

[0039] Place the tungsten-copper alloy on the substrate of the selective laser melting equipment workbench, and then cover the surface of the tungsten-copper alloy with the ultra-fine crystal / nanocrystalline tungsten-copper powder obtained in step 1, with a thickness of 500 μm, close the hatch and vacuumize Then fill with nitrogen.

[0040] Step 3, Laser Treatment

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

Embodiment 3

[0043] Step 1, mixing ultrafine / nanocrystalline powder

[0044] Ultrafine crystal or nanocrystalline tungsten powder is mixed with copper powder to obtain ultrafine crystal / nanocrystalline tungsten copper powder; the above mixed powder is composed of 50% tungsten and 50% copper respectively by mass percentage.

[0045] Step 2, powder 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 crystal / nanocrystalline tungsten-copper powder obtained in step 1, with a thickness of 100 μm, close the hatch and vacuumize Then filled with argon.

[0047] Step 3, Laser Treatment

[0048] Scan the ultra-fine crystal / nanocrystalline tungsten copper powder coated in step 2 by the laser beam of the selective laser melting equipment. The specific laser surface treatment parameters are: laser power 500W, scanning speed 1000mm / s, scanning distance...

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Abstract

A surface coating powder laser treatment method for improving the mechanical properties of tungsten-copper alloys, comprising the following steps: step 1, mixing ultra-fine-grain or nano-crystal tungsten powder with copper powder to obtain ultra-fine-grain / nano-crystal tungsten-copper powder; step 2 , put the tungsten-copper alloy on the substrate of the selective laser melting equipment workbench, then cover the surface of the tungsten-copper alloy with the ultra-fine crystal / nanocrystalline tungsten-copper powder obtained in step 1, close the hatch and vacuumize and fill it into Inert gas such as argon or nitrogen; step 3, scan the ultrafine crystal / nanocrystalline tungsten copper powder coated in step 2 by the laser beam of the selective laser melting equipment, and complete the laser sintering or melting process of the powder; after the alloy is cooled , the required material can be obtained by taking it out from the studio of the selective laser melting equipment. This method significantly improves the mechanical properties 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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Patent Type & Authority Patents(China)
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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