CN-121976189-A - Preparation method of aluminum alloy armature modified film and aluminum alloy armature modified film

Abstract

The invention relates to the technical field of electromagnetic tracks, in particular to a preparation method of an aluminum alloy armature modified film and the aluminum alloy armature modified film. The preparation method of the aluminum alloy armature modified film layer comprises the following steps of carrying out surface treatment on an aluminum alloy armature, and then placing the aluminum alloy armature in a graphene plating solution for carrying out lifting dip plating, wherein the surface treatment comprises roughening treatment and hydroxylation treatment. The graphene plating solution is immersed through surface treatment and lifting, so that a uniform and continuous modified film is obtained, the surface roughness of the aluminum alloy is reduced, the current-carrying friction coefficient and the abrasion volume obtained by counter grinding with copper are greatly reduced, the abrasion phenomenon of an aluminum pivot/copper rail contact interface is effectively improved, meanwhile, the occurrence of ablation defects is avoided, the fused deposition of the aluminum alloy on the copper surface is reduced, and the service life and the emission efficiency of the copper rail are improved.

Inventors

• ZHANG XINWEN
• Ban Yuxuan
• LI YAN
• LI SHAOLIN
• SONG KEXING
• ZHANG GUOSHANG
• XIAO LILI
• RONG YI
• LIU SONG
• WANG XU

Assignees

• 河南省科学院材料研究所
• 河南省科学院
• 河南科技大学

Dates

Publication Date

20260505

Application Date

20260206

Claims (10)

1. 1. The preparation method of the aluminum alloy armature modified film layer is characterized by comprising the following steps of carrying out surface treatment on an aluminum alloy armature, and then placing the aluminum alloy armature in a graphene plating solution for carrying out lifting dip plating, wherein the surface treatment comprises roughening treatment and hydroxylation treatment.
2. 2. The method for preparing the aluminum alloy armature modified film according to claim 1, wherein the dip coating is a uniform-speed dip coating, the dip coating is performed at a uniform speed of 5-10 cm/s, and the number of times of the uniform-speed dip coating is 5-10 times.
3. 3. The method for preparing the aluminum alloy armature modified film according to claim 1, wherein the graphene plating solution is stirred in the process of dip-coating, and the stirring speed is 15-20 r/min.
4. 4. The method for preparing the aluminum alloy armature modified film according to claim 1, wherein the graphene plating solution comprises 1-5 wt.% of graphene, 1-3 wt.% of polyacrylamide and a solvent.
5. 5. The method for producing a modified film of an aluminum alloy armature as claimed in claim 1, wherein the roughness of the surface of the aluminum alloy armature after roughening is 0.3 to 0.5. Mu.m.
6. 6. The method for preparing the aluminum alloy armature modified film according to claim 1 or 5, wherein the roughening treatment is acid washing, the acid washing is that the aluminum alloy armature is soaked in acid liquid, the acid liquid comprises 10-20 vol.% nitric acid and 2.5-5 vol.% hydrofluoric acid, the mass concentration of the nitric acid is 65-70%, and the mass concentration of the hydrofluoric acid is 35-40%.
7. 7. The method for producing an aluminum alloy armature modified film according to claim 1, wherein the hydroxylation treatment is a plasma treatment of an aluminum alloy armature.
8. 8. The method for producing an aluminum alloy armature modified film according to claim 7, wherein the power during the plasma treatment is 80 to 120w for 100 to 600s.
9. 9. The method for preparing the aluminum alloy armature modified film according to claim 6, wherein the time for immersing the aluminum alloy armature in the acid solution is 2-5 min.
10. 10. An aluminum alloy armature-modified film prepared by the method for preparing an aluminum alloy armature-modified film according to any one of claims 1 to 9.

Description

Preparation method of aluminum alloy armature modified film and aluminum alloy armature modified film Technical Field The invention relates to the technical field of electromagnetic tracks, in particular to a preparation method of an aluminum alloy armature modified film and the aluminum alloy armature modified film. Background Electromagnetic emission refers to an emission mode containing electromagnetic energy, can break through the energy and speed limit of the traditional emission mode, and is a novel emission mode. The electromagnetic emission technology takes electric energy as a basic tissue form, is an energy conversion technology for directly converting electromagnetic energy into instantaneous kinetic energy required by an emission load, has the remarkable advantages of high emission kinetic energy, high system efficiency, high emission frequency, quick starting time, strong continuous emission capability, strong load adjustability and the like, and is a novel emission technology for replacing the traditional mechanical energy emission and chemical energy emission. In the service process of electromagnetic equipment, a pivot/rail interface relates to a severe service environment of electric, magnetic, thermal and force multi-field coupling, so that current-carrying abrasion, melting and ablation of an aluminum alloy material for an armature are easily caused, and the aluminum alloy is fused and deposited on the surface of a rail to cause contact deterioration of the pivot/rail interface, thereby influencing the emission efficiency and reducing the service life of an electromagnetic emission device. Through the structure and process optimization of materials, the armature surface modification is utilized to reduce the current-carrying friction force of the pivot/rail contact interface, inhibit the rail damage caused by aluminum alloy adhesion and improve the pivot/rail contact state. The application publication number CN115839637A of published application No. 3/24 of 2023 discloses an electromagnetic track gun armature capable of reducing aluminum adhesion and a surface modification method, wherein the electromagnetic track gun armature is formed by magnetron sputtering a modified film which is a pure tungsten film, a pure silver film, a titanium alloy film, a TiC alloy film, a tungsten stainless steel film or/and a chromium stainless steel film on the surface of an aluminum alloy armature, the thickness of the modified film is 800 nm-8 mu m, the modified film is in a columnar crystal structure, and the problem of aluminum alloy adhesion caused by melting deposition in the process of transmitting the electromagnetic gun armature can be effectively reduced by preparing the modified film on the surface of the armature. However, the magnetron sputtering film layer area and uniformity of the surface of the special-shaped armature are limited by the target material, the film layer quality is difficult to ensure effectively, and the cost of the pure tungsten and pure silver and other noble metal film layers is high. The Chinese patent application with publication number CN110450340A published in 11 months 15 of 2019 discloses a nano graphene/aluminum alloy based self-lubricating composite material and a preparation method thereof, wherein an aluminum alloy substrate is subjected to ultrasonic cleaning and then subjected to nano high-energy shot blasting treatment, a surface nano working layer is prepared on the aluminum alloy substrate through injection molding, the nano working layer comprises 30-40% of nano graphene, 20-40% of polyamide, 10-20% of molybdenum disulfide, 10-20% of sodium chloride and 5-10% of copper powder, and the defects of poor friction and wear performance, poor bonding strength, short service life and the like of a common aluminum alloy based composite material are overcome, and the composite material has the advantages of high bonding strength, good friction and wear performance, long service life, simplified production process, low cost and the like. However, when the aluminum alloy modified film is used as an aluminum alloy armature and a copper alloy electromagnetic track in a matched manner, the current-carrying friction performance is still poor, and the preparation method of the modified film is complex and has harsh conditions. Disclosure of Invention The first aim of the invention is to provide a preparation method of an aluminum alloy armature modified film layer, which solves the problem that the current-carrying friction performance of the existing aluminum alloy armature modified film is poor. The second purpose of the invention is to provide an aluminum alloy armature modified film layer, which solves the problem that the current-carrying friction performance of the existing aluminum alloy armature modified film is poor. In order to solve the technical problems, the technical scheme of the preparation method of the aluminum alloy armature modified film layer is as foll