Method for preparing bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials

A technology of solid-liquid composite and composite materials, which is applied in the field of preparing bimetallic composites through solid-liquid composite casting and post-drawing combination process, can solve the problems of low performance, thermal cracking, and component segregation of interacting bimetallic composites, and achieves Improve mechanical properties and physical properties, avoid oxidation slag inclusion, improve shear performance

Inactive Publication Date: 2016-05-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the defects in the prior art, the purpose of the present invention is to provide a method for preparing bimetallic composite materials by solid-liquid composite and drawing combination of solid aluminum materials, so as to solve the problem that the existing composite technology often leads to the formation of oxidized slag inclusions and gas absorption in the bonding area. , thermal cracking, composition segregation, and the existence of oxide film seriously affects the interaction between the two metals and the low performance of bimetallic composites, etc., so that the metallurgical bonding between the two aluminum alloys is formed, which has excellent mechanical properties

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  • Method for preparing bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials

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Embodiment 1

[0033] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid aluminum, including the following steps:

[0034] Step 1. Perform thermal spraying zinc surface treatment on the solid 6101 extruded aluminum alloy material to be connected, and the thickness of the zinc layer is 10 μm;

[0035] Step 2. Presetting the surface-treated solid 6101 extruded aluminum alloy at the required position in the mold cavity;

[0036] Step 3: Melt the AZ91 magnesium alloy in the resistance furnace and pour it into the mold cavity. Using the processing technology of squeeze casting, the pouring temperature is 700 ° C, and the squeeze casting pressure is 60 MPa to form a metallurgical bond between aluminum and magnesium;

[0037] Step 4: Perform annealing treatment on the obtained 6101-AZ91 aluminum-magnesium bimetal drawing blank before drawing, the annealing temperature is 100°C, the annealing time is 300min, ...

Embodiment 2

[0041] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid aluminum, including the following steps:

[0042] Step 1. Electrogalvanizing surface treatment is performed on the solid A356 cast aluminum alloy preset material to be connected, and the thickness of the zinc layer is 0.1 μm;

[0043] Step 2, presetting the surface-treated solid A356 cast aluminum alloy in the required position in the mold cavity;

[0044] Step 3: Melt the AZ31 magnesium alloy in the resistance furnace and pour it into the mold cavity. Using the processing technology of squeeze casting, the pouring temperature is 660°C, and the squeeze casting pressure is 30MPa, so that the metallurgical bond between aluminum and magnesium is formed;

[0045] Step 4: Perform annealing treatment on the obtained A356-AZ31 aluminum-magnesium bimetallic drawing blank before drawing, the annealing temperature is 300°C, the annealing t...

Embodiment 3

[0049] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid aluminum, including the following steps:

[0050] Step 1. Perform thermal spraying zinc surface treatment on the solid pure aluminum preset material to be connected, and the thickness of the zinc layer is 15 μm;

[0051] Step 2. Presetting the surface-treated solid solid pure aluminum at the required position in the mold cavity;

[0052] Step 3: Melt the ZA-12 zinc alloy in the resistance furnace and pour it into the mold cavity. Using the metal mold casting process, the pouring temperature is 700 ° C to form a metallurgical bond between aluminum and zinc;

[0053] Step 4, drawing the obtained pure aluminum-ZA-12 aluminum-zinc bimetal, the process is direct drawing, the drawing temperature is 250°C, the diameter reduction ratio is 10 / 100, and the drawing speed is 20m / min;

[0054] Step 5. Put the obtained Al-Zn bimetallic compos...

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Abstract

The invention discloses a method for preparing a bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials. The method comprises the step of preparing a bimetallic drawing blank through solid-liquid compounding casting and the step of drawing the blank to prepare the bimetallic composite. The method has the beneficial effects that the technological means of solid-liquid connection adopted after protection of a surface zinc layer is utilized, a series of problems that oxide inclusion, air suction, heat cracking, ingredient segregation and the like are likely to exist when aluminum and other materials are connected in a traditional welding method are solved, and the problem that oxide films are likely to be formed on the surfaces of aluminum materials at high temperature, and consequently metallurgical bonding between the aluminum and other materials is hindered is solved; and forming is achieved through a drawing method, intermediate compounds formed on an interface in the solid-liquid compounding process are broken, and the mechanical property and the physical property of the bimetallic composite and a base material are improved. According to the method, gas shield is not needed, the compounding technology is simple, the technological conditions are wide, operation is easy, the technological equipment requirement is simple, the interface bonding strength is high, and electric conductivity is good.

Description

technical field [0001] The invention belongs to the field of preparation of bimetallic composite materials, in particular to a method for preparing bimetallic composite materials through solid-liquid composite and drawing combination of solid aluminum materials, especially a method for preparing bimetallic composite materials through solid-liquid composite casting and drawing combination process Composite methods. Background technique [0002] With the development of modern industrial technology, the requirements for the comprehensive performance of materials are getting higher and higher. Under many working conditions, it is difficult for a single component metal material to meet the requirements. Bimetallic composite material is a new type of composite material prepared by combining two metals with different properties through various composite technologies. Compared with single-element metal materials, bimetallic composite materials can comprehensively utilize the physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B21C1/00C22F1/04
CPCB22D19/16B21C1/00C22F1/04
Inventor 刘腾王渠东刘国平
Owner SHANGHAI JIAO TONG UNIV
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