Tungsten alloy coating preparation equipment and method

An alloy coating, tungsten alloy technology, applied in metal material coating process, coating, gaseous chemical plating and other directions, to achieve good high temperature resistance, improve the ability to resist high temperature gas oxidation erosion, reduce equipment costs

Active Publication Date: 2020-11-24
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a new type of low-toxicity preparation equipment and method for high-temperature-resistant and corrosion-resistant metal tungsten alloy coatings for the deficiencies of the existing high-temperature-resistant or corrosion-resistant metal tungsten alloy coating preparation methods

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  • Tungsten alloy coating preparation equipment and method

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Embodiment 1

[0066] This embodiment provides a kind of preparation method of tungsten alloy coating:

[0067] Firstly, the sample 2 (sample 2 is a cuboid 30CrMnSi structure, length 100mm×width 60mm×height 5mm) after pretreatment such as sanding and drying is suspended in the reactor 3 . First pass pure argon and pure hydrogen to discharge the air in the reactor 3, adjust the temperature of the heating furnace 1 to 500°C, and then set W(CO) respectively 6 Evaporator, Mo(CO) 6 The heating temperature of the evaporator and the counter is 80°C and 90°C, and the gas flow rate is Q H2 =800ml / min, W(CO) 6 Argon carrying flow Q 载Ar1 =200ml / min, Mo(CO) 6 Carrier gas flow Q 载Ar2 =50ml / min, the deposition time is 2h, after the deposition is completed, continue to flow argon to cool to room temperature. The thickness of the coating is 50 microns, the content of tungsten in the coating is 93.8%, and the content of molybdenum is 6.2%. The neutral salt spray test is carried out on sample 2, and the...

Embodiment 2

[0069] This embodiment provides a kind of preparation method of tungsten alloy coating:

[0070] First, the sample 2 (sample 2 is a TC4 titanium alloy pipe fitting with an inner diameter of 25 mm, an outer diameter of 30 mm, and a length of 100 mm) that has been pretreated by sanding and drying is placed in the reactor 3 . First feed pure argon and pure hydrogen to discharge the air in the reactor 3, adjust the temperature of the heating furnace 1 to 700°C, and then set W(CO) respectively 6 Evaporator, Mo(CO) 6 The heating temperature of the evaporator and the counter is 80°C and 90°C, and the gas flow rate is Q H2 =600ml / min, W(CO)6 Argon carrying flow Q 载Ar1 =200ml / min, Mo(CO) 6 The carrier gas flow rate is Q 载Ar2 =100ml / min, the deposition time is 3h, after the deposition is completed, continue to flow argon gas to cool to room temperature. The thickness of the coating is 430 microns, the content of tungsten in the coating is 83.6%, and the content of molybdenum is 16....

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Abstract

The invention provides tungsten alloy coating preparation equipment and method and relates to the technical field of surface engineering, in particular to tungsten alloy coating preparation equipmentcomprising a reactor arranged in a heating furnace. The reactor communicates with a tail gas treatment device through an exhaust pipeline and communicates with hydrogen, argon, tungsten hexacarbonyl and molybdenum hexacarbonyl through gas delivery pipelines correspondingly, and the argon and the tungsten hexacarbonyl communicate with the molybdenum hexacarbonyl. The invention further provides thetungsten alloy coating preparation method comprising the steps that an atmospheric pressure chemical vapor deposition method is adopted for preparing a metal tungsten alloy coating, precursors used for deposition are the tungsten hexacarbonyl and the molybdenum hexacarbonyl, decomposition reaction is conducted under low temperature to prepare a tungsten coating, and the reaction equation is W(CO)6->W+6CO, Mo(CO)6->Mo+6CO. the technical scheme is adopted, resistance to high temperature gas oxidation scouring and resistance to corrosive medium erosion of a C / C composite, graphite, steel, titanium and other materials can be improved, and service time is prolonged.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a tungsten alloy coating preparation equipment and method, suitable for high-temperature or corrosion-resistant protection of substrates such as C / C composite materials, graphite, steel, and titanium. Background technique [0002] Metal tungsten is the metal with the highest melting point, and its vapor pressure is low, its evaporation rate is small, and its chemical properties are relatively stable. It can be used as a high-temperature or corrosion-resistant protective coating material for C / C composite materials, graphite, steel, titanium and other substrates. The coating is brittle, and the toughness of pure tungsten can be improved by adding molybdenum for toughening. [0003] The preparation process of tungsten alloy coating mainly includes plasma spraying method, molten salt electroplating method and vapor phase deposition method. Among them, the plasma sprayin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/16C23C16/44
CPCC23C16/16C23C16/44
Inventor 吴护林何庆兵李忠盛丛大龙宋凯强赵子鹏张敏陈海涛
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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