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CN-121244681-B - Brass aluminum brass composite material and preparation method and application of cold composite material

CN121244681BCN 121244681 BCN121244681 BCN 121244681BCN-121244681-B

Abstract

The application provides a brass aluminum brass composite material and a preparation method and application of cold compounding thereof, wherein the preparation method comprises the steps of carrying out solid-solid cold compounding rolling on brass, aluminum and brass to obtain a first intermediate composite material, wherein the thickness ratio of the brass, the aluminum and the brass is 1 (1-8): 1, the solid-solid cold compounding rolling is single-pass rolling, and the single-pass rolling reduction rate is 50% -70%; and performing diffusion annealing treatment at the temperature of 350-480 ℃ for 2-10 min, and finally performing cold rolling treatment to obtain the composite material with the target thickness. The interlayer surface oxide film of the two metals is extruded and crushed by the reduction deformation of 50-70%, and an intermetallic compound layer is formed at the joint of the two metals by controlling the diffusion annealing process, so that the bonding strength between the metals is improved. The composite material has high interlayer bonding strength, improved heat conduction performance, lower density and good electric conduction performance compared with brass.

Inventors

  • WANG QIAO
  • LIAO MINGSHUN
  • DONG XING
  • HUANG CHANGHAO
  • WANG XUEMENG

Assignees

  • 广州众山功能材料有限公司

Dates

Publication Date
20260505
Application Date
20251203

Claims (8)

  1. 1. The preparation method of the brass aluminum brass composite material is characterized by comprising the following steps: Carrying out solid-cold composite rolling on the first brass, the aluminum material and the second brass to obtain a first intermediate composite material, wherein the solid-cold composite rolling is single-pass rolling, the single-pass rolling reduction is 50% -70%, the thickness ratio of the first brass, the aluminum material and the second brass is 1 (1-8): 1, the aluminum material is one selected from 1-series aluminum alloy, 3-series aluminum alloy, 5-series aluminum alloy and 8-series aluminum alloy, and the mass fraction of copper in the first brass and the second brass is more than 58%; performing diffusion annealing treatment on the first intermediate composite material to obtain a second intermediate composite material, wherein the temperature of the diffusion annealing treatment is 350-480 ℃, and the time of the diffusion annealing treatment is 2-5 min; And carrying out cold rolling treatment on the second intermediate composite material to obtain a brass-aluminum-brass composite material with target thickness, wherein a 200-500nm intermetallic compound layer is arranged between a brass layer and an aluminum layer in the brass-aluminum-brass composite material.
  2. 2. The method according to claim 1, wherein the rolling speed of the solid-solid cold clad-rolling is 1-3m/min.
  3. 3. The production method according to claim 1 or 2, wherein the cold rolling treatment includes rough rolling and finish rolling; The total rolling reduction of the rough rolling treatment is 50% -75%, the single-pass rolling reduction is 15% -25%, and the surface roughness Ra of the working roll is 0.4-1.2 mu m; The total rolling reduction rate of the finish rolling treatment is 50% -75%, the single-pass rolling reduction rate is 15% -25%, and the surface roughness Ra of the working roll is 0.2-0.8 mu m.
  4. 4. A method of preparing according to claim 3, further comprising: performing intermediate annealing after rough rolling, wherein the temperature of the intermediate annealing is 350-450 ℃; and carrying out finished product annealing after finish rolling, wherein the temperature of the finished product annealing is 350-450 ℃.
  5. 5. The method of manufacturing according to claim 1 or 2, characterized in that the surface of the first and second brass comprises a layer of pure copper of 200-1000nm before the solid-solid cold clad-rolling.
  6. 6. The production method according to claim 1 or 2, characterized in that before the solid-solid cold clad-rolling, the production method further comprises: and roughening the surfaces of the first brass, the second brass and the aluminum material by an online roughening machine.
  7. 7. The brass aluminum brass composite material is characterized in that the brass aluminum brass composite material is prepared by the preparation method of any one of claims 1-6, and the thickness ratio of a brass layer, an aluminum layer and a brass layer in the brass aluminum brass composite material is 1 (1-8): 1; An intermetallic compound layer of 200-500nm is included between the brass layer and the aluminum layer.
  8. 8. An LED fixture prepared from the brass aluminum brass composite material of claim 7.

Description

Brass aluminum brass composite material and preparation method and application of cold composite material Technical Field The application relates to the field of metal composite material processing, in particular to a brass aluminum brass composite material and a preparation method and application of cold compounding of the brass aluminum brass composite material. Background As a key structural member of an LED package, a light emitting Diode (LIGHT EMITTING Diode, abbreviated as LED) holder is required to have characteristics such as electrical conductivity, thermal conductivity, mechanical support, and weight reduction. The traditional LED support adopts brass (such as C2680) and other single metal materials, the density of the single metal brass is higher (about 8.9 g/cm < 3 >), the whole weight of the LED support product is larger, the light weight requirement is not facilitated, and the heat dissipation performance of the LED support of the single metal brass is poor. Therefore, a material that is lightweight and can satisfy the heat dissipation, electrical conduction and mechanical properties of LEDs is needed. Disclosure of Invention The application provides a brass aluminum brass composite material and a preparation method and application of a cold composite thereof, which are used for meeting the requirements of light weight, heat dissipation, electric conduction and mechanical properties of an LED bracket. In a first aspect, the application provides a method for preparing a brass aluminum brass composite material by cold compounding, comprising the following steps: carrying out solid-cold composite rolling on the first brass, the aluminum material and the second brass to obtain a first intermediate composite material, wherein the solid-cold composite rolling is single-pass rolling, the single-pass rolling reduction is 50% -70%, and the thickness ratio of the first brass to the aluminum material to the second brass is 1 (1-8): 1; Performing diffusion annealing treatment on the first intermediate composite material to obtain a second intermediate composite material, wherein the temperature of the diffusion annealing treatment is 350-480 ℃, and the time of the diffusion annealing treatment is 2-10 min; And performing cold rolling treatment on the second intermediate composite material to obtain the brass-aluminum-brass composite material with the target thickness. Further, the aluminum material is selected from one of a 1-series aluminum alloy, a 3-series aluminum alloy, a 5-series aluminum alloy and an 8-series aluminum alloy; And/or, the mass fraction of copper in the first brass and the second brass is greater than 58%. Further, the rolling speed of the solid-solid cold composite rolling is 1-3m/min. Further, the cold rolling treatment includes rough rolling and finish rolling; The total rolling reduction rate of the rough rolling treatment is 50% -75%, the single-pass rolling reduction rate is 15% -25%, the pre-rolling tension and the post-rolling tension are 300-600 Kg, the rolling speed is 10-40m/min, and the surface roughness Ra of the working roller is 0.4-1.2 mu m; The total rolling reduction rate of the finish rolling treatment is 50% -75%, the single-pass rolling reduction rate is 15% -25%, the pre-rolling tension and the post-rolling tension are 200-400 Kg, the rolling speed is controlled to be 10-40m/min, and the surface roughness Ra of the working roll is 0.2-0.8 mu m. Further, the preparation method further comprises the following steps: and performing intermediate annealing after the rough rolling treatment, wherein the temperature of the intermediate annealing is 350-450 ℃, and the time of the intermediate annealing is 5-12 min. And carrying out finished product annealing after the finish rolling treatment, wherein the temperature of the finished product annealing is 350-450 ℃, and the time of the finished product annealing is 5-12 min. Further, the surfaces of the first and second brass comprise a layer of pure copper of 200-1000nm prior to the solid-to-solid cold clad-rolling. Further, before the solid-solid cold clad-rolling, the preparation method further comprises: And roughening the surface of the brass and the surface of the aluminum material by an online roughening machine. In a second aspect, the application provides a brass aluminum brass composite material, which is prepared by the preparation method of any one of the first aspects, wherein the thickness ratio of a brass layer to an aluminum layer to a brass layer in the brass aluminum brass composite material is 1 (1-8): 1. Further, an intermetallic compound layer of 200-500nm is included between the brass layer and the aluminum layer. In a second aspect, the application provides an LED support, which is prepared from the brass-aluminum-brass composite material in the second aspect. The preparation method improves the bonding strength between metal layers through the reduction deformation of 50-70%, and improves the bondi