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CN-117660954-B - Method for producing metal composite and metal composite

CN117660954BCN 117660954 BCN117660954 BCN 117660954BCN-117660954-B

Abstract

The invention discloses a preparation method of a metal composite part and the metal composite part prepared by the preparation method of the metal composite part. The preparation method of the metal composite part comprises the steps of providing a first metal part, arranging a metal powder layer on the first metal part, melting the metal powder layer to form the metal composite layer, wherein the metal powder layer comprises a plurality of first powder blocks formed by first metal powder and a plurality of second powder blocks formed by second metal powder, arranging a second metal powder layer formed by the second metal powder on the metal composite layer, and melting the second metal powder layer to form the second metal layer to obtain the required metal composite part. In the metal composite part prepared by the preparation method of the metal composite part, the bonding strength of the metal composite layer and the first metal part and the bonding strength of the metal composite layer and the second metal layer are both higher, so that the tensile strength of the metal composite part is higher.

Inventors

  • ZHU YUETONG
  • WANG ZHIWEI

Assignees

  • 常州瑞德丰精密技术有限公司

Dates

Publication Date
20260505
Application Date
20231130

Claims (8)

  1. 1. A method of making a metal composite comprising the steps of: Providing a first metal piece; The method comprises the steps of arranging a metal powder layer on a first metal piece, melting the metal powder layer to form a metal composite layer, wherein the metal powder layer comprises a plurality of first powder blocks formed by first metal powder and a plurality of second powder blocks formed by second metal powder, two adjacent first powder blocks are separated by the second powder blocks or two adjacent second powder blocks are separated by the first powder blocks, the materials of the first metal piece and the first metal powder are all first metal or alloy containing the first metal, the materials of the second metal powder are second metal or alloy containing the second metal, and the first metal and the second metal are different; A second metal powder layer formed by the second metal powder is arranged on the metal composite layer, and the second metal powder layer is melted to form a second metal layer, so that a required metal composite piece is obtained; The first powder blocks and the second powder blocks are a plurality of strip-shaped blocks, the first powder blocks and the second powder blocks are alternately arranged, and an included angle of 90 degrees is formed in the length direction of two first powder blocks in two adjacent metal composite layers.
  2. 2. The method of producing a metal composite according to claim 1, wherein an area of projection of the first powder mass on the first metal member in one of the at least two metal composite layers, which is closer to the first metal member, is not smaller than an area of projection of the first powder mass on the first metal member in one of the metal composite layers, which is farther from the first metal member.
  3. 3. The method for producing a metal composite according to any one of claims 1 to 2, wherein the operation of melting the metal powder layer is to melt the metal powder layer with a laser.
  4. 4. A method of producing a metal composite according to claim 3, wherein a thickness of the metal powder layer in the metal powder layer is 20 μm to 60 μm, a particle diameter of the first metal powder is 20 μm to 50 μm, and a particle diameter of the second metal powder is 20 μm to 50 μm.
  5. 5. The method according to claim 4, wherein the first metal is copper and the second metal is aluminum, wherein the laser power density is 9554w/mm 2 ~14331w/mm 2 , the laser scanning speed is 700mm/s to 1000mm/s, and the spot diameter is 0.2mm when the first metal powder is melted by laser, and the laser power density is 6369w/mm 2 ~11146w/mm 2 , the laser scanning speed is 600mm/s to 1000mm/s, and the spot diameter is 0.2mm when the second metal powder is melted by laser; Or the first metal is aluminum and the second metal is copper, when the first metal powder is melted by laser, the laser power density is 6369w/mm 2 ~11146w/mm 2 , the laser scanning speed is 600-1000 mm/s, the light spot diameter is 0.2mm, when the second metal powder is melted by laser, the laser power density is 9554w/mm 2 ~14331w/mm 2 , the laser scanning speed is 700-1000 mm/s, and the light spot diameter is 0.2mm.
  6. 6. The method of producing a metal composite according to claim 4, further comprising, after the operation of providing a first metal piece, before the operation of providing a metal powder layer on the first metal piece, performing the operations of: carrying out surface deoxidation treatment on the first metal piece; and/or arranging a first metal powder layer formed by the first metal powder on the first metal piece, and melting the first metal powder layer to form a first metal layer.
  7. 7. The method according to claim 4, further comprising, after the second metal powder layer is melted to form the second metal layer, repeating the above-mentioned operation of providing the second metal powder layer formed of the second metal powder, melting the second metal powder layer to form the second metal layer at least once, and forming at least two second metal layers, before the operation of obtaining the desired metal composite; The method of producing the metal composite further includes, after the operation of obtaining the desired metal composite, performing an operation of annealing the metal composite.
  8. 8. A metal composite, characterized in that the metal composite is prepared by the method for preparing a metal composite according to any one of claims 1 to 7.

Description

Method for producing metal composite and metal composite Technical Field The invention relates to the technical field of metal materials, in particular to a preparation method of a metal composite part and the metal composite part. Background The electronic device has a limited internal space, so that a conductive element with better conductive effect, such as a copper element, is usually used in the electronic device, and copper wires are not used in the external wire for saving cost, so that a metal composite part is needed on the electronic device to electrically connect the conductive element in the device and the external wire respectively. Copper and aluminum are used as two common metals with excellent conductivity, and have wide application in the field of conductive materials, and copper-aluminum composite parts are also gradually becoming important conductive elements. For example, the copper-aluminum composite pole block and the copper-aluminum composite pole column of the power battery are respectively connected with a copper element inside the power battery and an aluminum wire outside the power battery. In the conventional metal composite part manufacturing method, two metals, such as copper and aluminum, are often manufactured into a metal composite part by adopting methods of surface overlaying, explosion cladding, rolling cladding and the like, so that two metal interfaces which are in contact with each other are formed at the joint of the two metals, the two metal interfaces are well-defined, and the materials of the two metal interfaces are different, so that the bonding strength between the two metal interfaces is lower, and the bonding strength of the joint of the two metals is lower, so that the tensile strength of the conventional metal composite part is lower. Disclosure of Invention Based on this, it is necessary to provide a method for producing a metal composite that can solve the above-mentioned problems. In addition, there is a need to provide a metal composite part prepared by the method for preparing a metal composite part. A method of making a metal composite comprising the steps of: Providing a first metal piece; A metal powder layer is arranged on the first metal piece, the metal powder layer is melted, and a metal composite layer is formed, wherein the metal powder layer comprises a plurality of first powder blocks formed by first metal powder and a plurality of second powder blocks formed by second metal powder, two adjacent first powder blocks are separated by the second powder blocks or two adjacent second powder blocks are separated by the first powder blocks, the materials of the first metal piece and the first metal powder are both first metal or alloy containing the first metal, the material of the second metal powder is second metal or alloy containing the second metal, and the first metal and the second metal are different; And arranging a second metal powder layer formed by the second metal powder on the metal composite layer, and melting the second metal powder layer to form a second metal layer to obtain the required metal composite piece. In one embodiment, the method further comprises repeating the above-mentioned operation of disposing the metal powder layer, melting the metal powder layer, and forming the metal composite layer at least once, to form at least two metal composite layers, after the operation of melting the metal powder layer to form the metal composite layer, and before the operation of disposing the second metal powder layer formed of the second metal powder on the metal composite layer. In one embodiment, the first powder blocks and the second powder blocks are a plurality of long-strip-shaped blocks, the first powder blocks and the second powder blocks are alternately arranged, and an included angle of 0-90 degrees is formed in the length direction of two first powder blocks in two adjacent metal composite layers. In one embodiment, the area of the projection of the first powder block in one of the metal composite layers closer to the first metal piece on the first metal piece is not smaller than the area of the projection of the first powder block in one of the metal composite layers farther from the first metal piece on the first metal piece in at least two of the metal composite layers. In one embodiment, the operation of melting the metal powder layer is to melt the metal powder layer with a laser. In one embodiment, the thickness of the metal powder layer is 20-60 μm, the particle size of the first metal powder is 20-50 μm, and the particle size of the second metal powder is 20-50 μm. In one embodiment, the first metal is copper and the second metal is aluminum, when the first metal powder is melted by laser, the laser power density is 9554w/mm 2～14331w/mm2, the laser scanning speed is 700-1000 mm/s, the light spot diameter is 0.2mm, when the second metal powder is melted by laser, the laser power density is 6369w/mm 2～11146w/mm2, the