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High-density copper alloy coating and preparation method thereof
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A coating and dense technology, applied in the field of high-density copper alloy coating and its preparation, can solve the problems of high oxidation degree, low density, low-high density copper alloy coating, etc.
Active Publication Date: 2020-04-14
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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[0007] The purpose of the present invention is to provide a high-density copper alloy coating with a lower oxidation degree and its preparation method in view of the problems of high oxidation degree and low density of the copper alloy coating prepared by the existing thermal spraying technology.
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Embodiment 1）
[0021] The high-density copper alloy coating in this embodiment is a red copper coating, and the chemical composition of the red copper coating is as follows: 88.17wt% copper, 10.36wt% carbon, and 1.47wt% oxygen.
[0022] The scanning electron microscope photos and metallographic microscope photos of the copper coating are shown in figure 1 with figure 2 .
[0023] Depend on figure 1 It can be seen that the thickness of the copper coating is about 1.2 mm.
[0024] Depend on figure 2 It can be calculated that the porosity of the copper coating is about 1.27%.
[0025] The preparation method of the red copper coating of the present embodiment is as follows:
[0026] ① Degreasing, derusting and sand blasting roughening pretreatment on the surface of the copper alloy substrate.
[0027] The copper alloy base material used in this embodiment is H62 brass, and the size is 50mm×30mm×10mm.
[0028] The sandblasting roughening process is as follows: the sand material is brown ...
Embodiment 2）
[0032] The high-density copper alloy coating in this embodiment is a brass coating, and the chemical composition of the brass coating is as follows: 56.24wt% copper, 11.20wt% carbon, 31.38wt% zinc, and 1.18wt% oxygen.
[0033] The scanning electron micrographs and metallographic micrographs of the brass coating are shown in image 3 with Figure 4 .
[0034] Depend on image 3 It can be seen that the thickness of the brass coating is about 0.4mm.
[0035] Depend on Figure 4 The porosity of this brass coating can be calculated to be about 0.88%.
[0036] The preparation method of the brass coating of the present embodiment is as follows:
[0037] ① Same as Example 1.
[0038] ②Brass wire with a diameter of 2mm is used as the spraying material, and the plasma transfer arc is used as the heat source. The copper alloy wire is ignited by the plasma non-transfer arc to the plasma transfer arc and melted into droplets, and atomized in compressed air The brass coating is obtai...
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Abstract
The invention discloses a high-density copper alloy coating and a preparation method thereof. The high-density copper alloy coating is a red copper coating or a brass coating with a thickness of 0.1-1.5 mm, porosity of 0.37%-3.56% and oxygen element content of 1.10-1.50wt%. A preparation method for the high-density copper alloy coating is an air wire plasma spraying technology which takes a copperalloy wire as a spraying material, takes a plasma transfer arc as a heat source, utilizes a plasma non-transferred arc to strike the copper alloy wire to the plasma transfer arc and melt into liquiddrops; and the liquid drops are sprayed to the surface of copper alloy matrix at a high speed under action of compressed air atomization to prepare the copper alloy coating. According to the high-density copper alloy coating disclosed by the invention, the air wire plasma spraying technology is combined with a plasma arc to perform spraying, and the copper alloy wire is taken as a spraying material, so that the high-density red copper coating with relatively low oxygen content and the brass coating can be prepared, and therefore, the defects of an existing thermal spraying technology are overcome.
Description
technical field [0001] The invention belongs to the technical field of copper alloy coating preparation, and in particular relates to a high-density copper alloy coating and a preparation method thereof. Background technique [0002] Thermal spraying technology is a method that uses a heat source to heat the sprayed material to a melted or semi-melted state, and sprays and deposits it on the surface of the pretreated substrate at a certain speed to form a coating. [0003] According to the different types of heat sources, thermal spraying mainly includes flame spraying and arc spraying. The former mainly includes flame spraying, explosive spraying and supersonic spraying; the latter mainly includes arc spraying and plasma spraying. [0004] Arc spraying is to generate an arc between two wire-like metal materials. The heat generated by the arc makes the metal wire gradually melt, and the molten part is sprayed to the surface of the substrate by the compressed air flow to for...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/06C22C9/04C22C9/00
CPCC22C9/00C22C9/04C23C4/06C23C4/134
Inventor 王晓明朱胜赵阳韩国峰周超极
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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