Pure aluminum surface treatment method for aluminum/nickel diffusion bonding

A technology of surface treatment and diffusion connection, which is applied in the direction of welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of application limitation, high surface treatment temperature, complex equipment, etc., and achieve improved connection quality, less gaps, and better welding rate-enhancing effect

Active Publication Date: 2016-01-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has complex equipment, high surface treatment temperature and easy chemical reaction to generate metal compounds, which will greatly limit the application in the field of welding

Method used

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  • Pure aluminum surface treatment method for aluminum/nickel diffusion bonding
  • Pure aluminum surface treatment method for aluminum/nickel diffusion bonding
  • Pure aluminum surface treatment method for aluminum/nickel diffusion bonding

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specific Embodiment approach 1

[0020] Specific embodiment one: a kind of pure aluminum surface treatment method that is used for aluminum / nickel diffusion connection of this embodiment, it is to adopt mechanical vibration surface treatment method to process pure aluminum surface; Specific treatment method is as follows:

[0021] After softening and annealing pure aluminum, stick it to the bottom of the stainless steel tank, add nickel powder and stainless steel balls into the tank, rigidly fix the stainless steel tank on a vibrating table that reciprocates up and down, and perform mechanical vibration surface treatment to complete the process. The pure aluminum surface treatment for aluminum / nickel diffusion connection described above; wherein, the mechanical vibration surface treatment conditions are: vibration time 30-60min, vibration amplitude 5mm, vibration frequency 50Hz, ball diameter 2.5-5mm, small The number of balls is 100-200; the amount of nickel powder added is 5-10g.

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the pure aluminum is a pure aluminum plate with a thickness of 1.5 mm, a diameter of 6 cm, and a mass purity of 99.9%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 in that the pure aluminum plate is processed into a pure aluminum plate with a thickness of 1.5 mm and a diameter of 6 cm by wire cutting before softening and annealing treatment. Others are the same as in the first embodiment.

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Abstract

The invention relates to pure aluminum surface treatment methods, in particular to a pure aluminum surface treatment method for aluminum/nickel diffusion bonding. According to the pure aluminum surface treatment method, a pure aluminum base material surface treatment method is a mechanical vibration treatment method, small stainless steel balls bonded with nickel powder constantly collide with a pure aluminum base material subjected to softening annealing treatment, and crushing of oxide films on pure aluminum surfaces is facilitated; cold welding is constantly conducted through energy rise caused by collision between the nickel powder and the pure aluminum base material, and part of nickel is inlaid in the pure aluminum base material; and finally, a coating nonuniform in thickness can be formed, so that the surface treatment effect is achieved. According to the method, diffusion bonding is conducted on the pure aluminum base material subjected to mechanical vibration surface treatment and the nickel, the oxide films on the aluminum surfaces are crushed more easily, and nickel-and-nickel bonding occurs, so that atomic diffusion is more sufficient, the number of gaps is smaller, the welding rate is increased significantly, and bonding quality is improved remarkably.

Description

technical field [0001] The invention relates to a surface treatment method of pure aluminum material and its application in aluminum / nickel diffusion connection. Background technique [0002] Aluminum and aluminum alloys have the advantages of low density, high toughness, good thermal stability, and good electrical and thermal conductivity, and are currently one of the most widely used metal materials. Nickel is a metal material suitable for various harsh corrosive environments. Connecting these two materials to make aluminum / nickel composite components can give full play to the excellent properties of these two materials, which has important theoretical and practical significance. [0003] Since a dense aluminum oxide film is easily formed on the surface of pure aluminum, and the physical and chemical properties of aluminum oxide are stable, it is difficult to spontaneously decompose or dissolve in the metal during the welding process. Therefore, the joining methods widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/24B23K20/02
CPCB23K20/02B23K20/24
Inventor 曹健盖磊王义峰亓钧雷张丽霞冯吉才
Owner HARBIN INST OF TECH
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