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Preparation method of airplane hydraulic oil tank piston rod surface coating

A surface coating, aircraft hydraulic technology, applied in the direction of coating, metal material coating technology, metal processing equipment, etc., can solve the problems of low dilution rate, different working environment, etc., to reduce environmental pollution, improve surface hardness and durability. abrasive effect

Pending Publication Date: 2022-08-09
国营芜湖机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, in the Chinese patent No. 201910106080.1, a wear-resistant and corrosion-resistant nickel-based silicon carbide composite coating for marine hydraulic piston rods and its preparation method, the corresponding formula is used as the laser cladding material, and the powder formula is processed by an automatic powder feeder. Send it to the surface of the pretreated piston rod steel substrate, and at the same time, the powder is clad on the surface of the piston rod by laser radiation, and finally forms a coating with a thickness of 0.5-2.0mm. Metallurgical combination, low dilution rate, excellent corrosion resistance, abrasion resistance and sandy seawater erosion resistance, can significantly improve the service life of marine hydraulic piston rods, but laser cladding and ultra-high-speed laser cladding are two Different preparation methods; the prepared coating material is Ni-based, which is used in marine working conditions and not suitable for aircraft hydraulic oil tanks, and the working environment is different

Method used

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  • Preparation method of airplane hydraulic oil tank piston rod surface coating
  • Preparation method of airplane hydraulic oil tank piston rod surface coating
  • Preparation method of airplane hydraulic oil tank piston rod surface coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like Figure 1 to Figure 4 As shown, a preparation method of the surface coating of the piston rod of an aircraft hydraulic oil tank, the specific steps are as follows:

[0027] S1. The material of coating 4 is Fe-based nanophase composite material, and the mass percentage of each component is as follows: C: 0.28wt%, Si: 0.90wt%, Mn: 0.80%, Cr: 0.80%, Ni: 0.02wt%, P : 0.02wt%, S: 0.02wt%, Nanoparticle WC: 0.5wt%, Nanoparticle TiC: 0.5wt%, Nanoparticle NbC: 0.1wt%, Fe balance. The powder particle size of the Fe-based material is 50-100 μm, spherical or nearly spherical, and the fluidity is less than 20s / 50g, and the powder is vacuum-dried for use, the temperature is 100°C, and the time is 3h;

[0028] S2. Sandblast the surface of the piston rod 5 and clean it with alcohol;

[0029] S3. Use ultra-high-speed laser cladding on the surface of the piston rod 5 to prepare the coating 4, such as figure 1 As shown, the piston rod 5 is clamped on the high-speed turntable 6, wh...

Embodiment 2

[0036] like Figure 1 to Figure 4 As shown, a preparation method of the surface coating of the piston rod of an aircraft hydraulic oil tank, the specific steps are as follows:

[0037] S1. The material of coating 4 is Fe-based nanophase composite material, and the mass percentage of each component is as follows: C: 0.3wt%, Si: 1.0wt%, Mn: 0.9wt%, Cr: 1.1wt%, Ni: 0.03wt% , P: 0.02wt%, S: 0.02wt%, Nanoparticles WC: 1wt%, Nanoparticles TiC: 1wt% Nanoparticles NbC: 0.5wt%, Fe balance. The powder particle size of the Fe-based material is 50-100 μm, spherical or nearly spherical, and the fluidity is less than 20s / 50g, and the powder is vacuum-dried for use, the temperature is 100°C, and the time is 3h;

[0038] S2. Sandblast the surface of the piston rod 5 and clean it with alcohol;

[0039] S3. Use ultra-high-speed laser cladding on the surface of the piston rod 5 to prepare the coating 4, such as figure 1As shown, the piston rod 5 is clamped on the high-speed turntable 6, while...

Embodiment 3

[0046] like Figure 1 to Figure 4 As shown, a preparation method of the surface coating of the piston rod of an aircraft hydraulic oil tank, the specific steps are as follows:

[0047] S1. The material of coating 4 is Fe-based nanophase composite material, and the mass percentage of each component is as follows: C: 0.34wt%, Si: 1.2wt%, Mn: 1.1wt%, Cr: 1.5wt%, Ni: 0.03wt% , P: 0.025wt%, S: 0.025wt%, Nanoparticles WC: 1wt%, Nanoparticles TiC: 1.5wt% Nanoparticles NbC: 0.5wt%, Fe balance. The powder particle size of the Fe-based material is 50-100 μm, spherical or nearly spherical, and the fluidity is less than 20s / 50g, and the powder is vacuum-dried for use, the temperature is 100°C, and the time is 3h;

[0048] S2. Sandblast the surface of the piston rod 5 and clean it with alcohol;

[0049] S3. Use ultra-high-speed laser cladding on the surface of the piston rod 5 to prepare the coating 4, such as figure 1 As shown, the piston rod 5 is clamped on the high-speed turntable 6,...

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Abstract

The invention relates to the field of laser processing additive manufacturing, in particular to a preparation method of an airplane hydraulic oil tank piston rod surface coating, which comprises the following specific steps: S1, preparing a coating material; s3, a coating is prepared on the surface of the piston rod in an ultra-high-speed laser cladding mode; s4, processing post-treatment: carrying out polishing treatment on the surface of the prepared coating; s5, performance detection; a traditional electroplating method is replaced with an ultra-high-speed laser cladding preparation method, environmental pollution is reduced, the microhardness of the prepared coating is larger than 300 HB, the abrasion weight loss of the coating is reduced by 40-50 mg / 1 h compared with that of a base body, and the surface hardness and abrasion resistance of the piston rod can be effectively improved.

Description

technical field [0001] The invention relates to the field of laser processing additive manufacturing, in particular to a preparation method for a surface coating of a piston rod of an aircraft hydraulic oil tank. Background technique [0002] The aircraft hydraulic oil tank is a pressurized oil tank. Its function is to receive oil from the hydraulic system and use the reciprocating propulsion of the piston rod. When the hydraulic accessories are working, they compensate the oil volume to the accessories, pressurize the oil suction line of the hydraulic pump, and create the work of the oil pump. condition. The diameter of the piston rod of the aircraft hydraulic fuel tank is 28mm, the material is 30CrMnSiA, and the surface coating is prepared by electroplating chrome. Under the long-term operation of the hydraulic fuel tank, the chrome-plated layer on the surface of the piston rod will be scratched and peeled off, resulting in oil leakage from the fuel tank. Airplane flight ...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/065C22C38/02C22C38/04C22C38/40
CPCC23C24/103C22C38/02C22C38/04C22C38/40Y02P10/25
Inventor 白兵袁晨风蔡小叶程宗辉张志强范朝
Owner 国营芜湖机械厂
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