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Method for manufacturing bi-metal composite material through combination of solid aluminum solid and liquid compounding and extruding

A composite material, solid-liquid composite technology, applied in other directions of manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of low performance, composition segregation, thermal cracking of interacting bimetallic composite materials, and improve mechanical and physical properties. , The effect of improving shear performance and avoiding oxidation slag inclusion

Inactive Publication Date: 2016-05-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 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 casting and extrusion combination of aluminum materials, so as to solve the problem of joint areas often caused when the existing composite technology connects aluminum materials and other materials. The formation of oxide slag, gas absorption, thermal cracking, and composition segregation problems, while solving a series of problems such as the existence of oxide film that seriously affects the interaction between the two metals and the low performance of bimetallic composite materials, so that the two Metallurgical bonding is formed between alloys, with excellent mechanical properties

Method used

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  • Method for manufacturing bi-metal composite material through combination of solid aluminum solid and liquid compounding and extruding

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Embodiment 1

[0032] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid composite casting and extrusion combined process of solid aluminum material, including the following steps:

[0033] Step 1. Perform thermal spraying zinc surface treatment on the solid 6101 extruded aluminum alloy preset material to be connected, and the thickness of the zinc layer is 15 μm;

[0034] Step 2. Presetting the surface-treated solid 6101 extruded aluminum alloy at the required position in the mold cavity;

[0035] 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 50 MPa to form a metallurgical bond between aluminum and magnesium;

[0036] Step 4: Perform pre-extrusion annealing treatment on the obtained 6101-AZ91 aluminum-magnesium bimetallic extrusion billet, the annealing temperature is 100...

Embodiment 2

[0040] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid composite casting and extrusion combined process of solid aluminum material, including the following steps:

[0041] Step 1. Perform thermal spraying zinc surface treatment on the solid A356 cast aluminum alloy preset material to be connected, and the thickness of the zinc layer is 50 μm;

[0042] Step 2, presetting the surface-treated solid A356 cast aluminum alloy in the required position in the mold cavity;

[0043] Step 3: Melting the AZ31 magnesium alloy in the resistance furnace and then pouring it into the mold cavity, using the processing technology of sand casting, the pouring temperature is 800 ° C, so that the metallurgical bond between aluminum and magnesium is formed;

[0044] Step 4: Perform pre-extrusion annealing treatment on the obtained A356-AZ31 aluminum-magnesium bimetallic extrusion billet, the annealing temperature is 100°C, the annealing time is 500mi...

Embodiment 3

[0048] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid composite casting and extrusion combined process of solid aluminum material, including the following steps:

[0049] Step 1. Electrogalvanizing surface treatment is performed on the solid pure aluminum preset material to be connected, and the thickness of the zinc layer is 0.1 μm;

[0050] Step 2. Presetting the surface-treated solid pure aluminum at the desired position in the mold cavity;

[0051] Step 3. Melt the ZA-12 zinc alloy in the resistance furnace and pour it into the mold cavity. Using the processing technology of squeeze casting, the pouring temperature is 560°C, and the squeeze casting pressure is 120MPa, so that a metallurgical bond is formed between aluminum and zinc. combined;

[0052] Step 4. Perform pre-extrusion annealing treatment on the obtained pure aluminum-ZA-12 aluminum-zinc bimetallic extrusion billet. The annealing temperature is 300°C, and the ...

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Abstract

The invention discloses a method for manufacturing a bi-metal composite material through combination of solid aluminum solid and liquid compounding and extruding. The method includes the step of casting and manufacturing a bi-metal extrusion blank through solid and liquid compounding and the step of manufacturing the bi-metal composite material by extruding the blank. The method is characterized in that the technical means that solid and liquid connection is conducted after surface zinc layer protection is adopted, a series of problems of oxide inclusion, air suction, hot tearing, composition segregation and the like caused when aluminum and other materials are connected through a traditional welding method are solved, and the problem of hindering of forming of metallurgical bonding between the aluminum and other materials due to the fact that an oxide film is liable to be formed on the surface of the aluminum at a high temperature is solved; and forming is achieved through an extrusion method, an intermediate compound formed on an interface in the solid and liquid compounding process is broken, and the mechanical performance and the physical performance of the bi-metal composite material and a base material are improved. By means of the method, gas shield is not needed, the compounding technology is simple, technology conditions are wide, operation is easy, the requirement for technology equipment is low, the interface combining strength is high, and electricity conductivity and heat conductivity are high.

Description

technical field [0001] The invention belongs to the field of preparation of bimetallic composite materials, and specifically relates to a method for preparing bimetallic composite materials by combining solid-liquid composite casting and extrusion of aluminum materials, that is, a method of solid-liquid composite casting and extrusion after presetting solid aluminum materials. A method for preparing a bimetallic composite material by a combined process. 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. Therefore, the research and preparation of new composite materials has become an important development direction in the field of materials science and engineering. Bimetallic composite material is a new type of composite material prepared b...

Claims

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Application Information

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IPC IPC(8): B23P23/04B22D19/16
CPCB23P23/04B22D19/16
Inventor 王渠东刘腾刘国平
Owner SHANGHAI JIAO TONG UNIV
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