Solid-liquid connecting method for aluminum-aluminum metal

A connection method and aluminum metal technology, applied in metal processing equipment, casting molding equipment, casting molds, etc., can solve problems affecting the performance of interactive joints, composition segregation, etc., to avoid oxidation slag inclusions, small constraints, and solve surface problems. The effect of the problem of oxide film

Inactive Publication Date: 2016-12-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a solid-liquid connection method of aluminum-aluminum metal, which solves the problem that the existing aluminum-aluminum connection technology often causes oxidized slag inclusion, gas absorption, thermal cracking, and composition in the joint area. At the same time, the existence of oxide film will seriously affect a series of problems such as the interaction between the two metals and the performance of the connecting parts, so that the two aluminum alloys form a metallurgical bond with excellent mechanical properties

Method used

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  • Solid-liquid connecting method for aluminum-aluminum metal
  • Solid-liquid connecting method for aluminum-aluminum metal
  • Solid-liquid connecting method for aluminum-aluminum metal

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Experimental program
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Embodiment 1

[0028] An aluminum-aluminum connection method related to this embodiment includes the following steps:

[0029] Step 1. Nickel plating is performed on the 6061 plate to be connected, and the thickness of the nickel layer is 5 μm;

[0030] Step 2, melting and refining the cast 6061 to be poured;

[0031] Step 3, presetting the nickel-plated 6061 plate obtained in step 1 in the mold cavity;

[0032] Step 4. Using the metal mold casting method, pour liquid 6061 aluminum into the cavity of the mold at 720°C to form a metallurgical bond between aluminum and aluminum, that is, to complete the solid-liquid connection of aluminum-aluminum metal.

[0033] figure 2 It is the metallographic diagram of the 6061 plate and the as-cast interface area under this condition. From the figure, it can be observed that there are no defects such as oxidized slag inclusions, gas absorption, and hot cracks in the bonding area; a metallurgical bond is formed between the two materials, and the interf...

Embodiment 2

[0035] This embodiment relates to a solid-liquid connection method for an aluminum alloy, and the specific scheme is the same as that of Embodiment 1, except that:

[0036] In step 1, the thickness of the nickel layer is 1 μm;

[0037] The casting temperature in step 4 is 680°C.

[0038] The results show that under this condition, after the solid-liquid combination of solid 6061 aluminum alloy and 6061 cast aluminum alloy, there are no defects such as oxidized slag inclusions, gas absorption, thermal cracking, etc. in the bonding area; there is no obvious interface between the two aluminum alloys, forming a Metallurgical bonding, using the surface protection zinc layer to solve the problem that the oxide film hinders the formation of metallurgical bonding. After tensile test, the connection strength is 135MPa.

Embodiment 3

[0040] This embodiment relates to a solid-liquid connection method for an aluminum alloy, and the specific scheme is the same as that of Embodiment 1, except that:

[0041] In step 1, the thickness of the nickel layer is 10 μm;

[0042] The casting temperature in step 4 is 750°C.

[0043] The results show that under this condition, after the solid-liquid combination of solid 6061 aluminum alloy and 6061 cast aluminum alloy, there are no defects such as oxidized slag inclusions, gas absorption, thermal cracking, etc. in the bonding area; there is no obvious interface between the two aluminum alloys, forming a Metallurgical bonding, using the surface protection zinc layer to solve the problem that the oxide film hinders the formation of metallurgical bonding. After tensile test, the connection strength is 145MPa.

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Abstract

The invention provides a solid-liquid connecting method for aluminum-aluminum metal, comprising the following steps of placing a solid aluminum material into a die cavity after carrying out nickel layer protection on the surface of the solid aluminum material; and pouring the molten aluminum material into the die cavity to cast, and forming metallurgical bonding between aluminum-aluminum metal materials to finish solid-liquid connection of the aluminum-aluminum metal. Compared with the prior art, the solid-liquid connecting method has the following beneficial effects that 1, compared with the traditional welding method, the solid-liquid connecting method is used for avoiding problems such as oxidation slag inclusion, air suction, hot crack and component segregation; 2, compared with a solid-solid connecting method, the solid-liquid connecting method is constrained a little by an appearance condition and can theoretically realize any-shaped aluminum-aluminum connection; and 3, the surface oxidation film problem is favorably solved by using a composite surface treatment process, a uniform and continuous nickel layer can be formed on the surface of a solid aluminum prefabricated material, so that the aluminum-aluminum connecting strength reaches to the relatively high level.

Description

technical field [0001] The invention relates to a solid-liquid connection method of aluminum-aluminum metal, which belongs to the field of preparation of bimetallic composite materials. Background technique [0002] As a representative of lightweight materials, aluminum alloys have been widely used in automobiles, electronics, aerospace and other industries. With the rapid development of industries and continuous advancement of technology, it is difficult to meet the requirements of material properties in various fields with a single casting or deformation material. Therefore, it is necessary to connect different materials together by welding, rolling, extrusion and other processes to maximize the advantages of different materials and make them have good comprehensive performance. [0003] However, when using traditional welding methods to join aluminum-aluminum alloys, due to the unique physical and chemical properties of aluminum alloys, a series of problems such as oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22C9/06B22D18/02
CPCB22D19/0081B22C9/06B22D18/02B22D19/16
Inventor 叶兵冯剑蒋海燕丁文江王渠东
Owner SHANGHAI JIAO TONG UNIV
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