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Method for preparing duplex metal composite material through solid-liquid compounding and drawing combination of solid steel

A technology of solid-liquid compounding and composite materials, which is applied in the direction of metal extrusion control equipment, metal extrusion, metal processing equipment, etc., can solve the problem of low performance of interactive bimetallic composite materials, and achieve improved mechanical and physical properties , Shear performance improvement, performance improvement effect

Inactive Publication Date: 2016-05-04
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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 steel materials, so as to solve the problem that pores are often formed in the bonding area when the existing composite technology connects steel materials and other materials , Oxide slag inclusion, burn-through and a series of problems, while solving a series of problems such as the existence of oxide film and intermediate compounds that seriously affect 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

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  • Method for preparing duplex metal composite material through solid-liquid compounding and drawing combination of solid steel

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Embodiment 1

[0031] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid steel, including the following steps:

[0032] Step 1. Perform thermal spraying zinc surface treatment on the pre-installed material of the solid Q235A structural steel to be connected, and the thickness of the zinc layer is 0.1 μm;

[0033] Step 2, presetting the surface-treated solid Q235A structural steel at the required position in the mold cavity;

[0034] Step 3: Melt 6101 extruded aluminum alloy in the cavity of the resistance furnace, use the processing technology of metal mold casting, and the pouring temperature is 750°C, so that the metallurgical bond between steel and aluminum is formed;

[0035] Step 4. Perform annealing treatment on the obtained Q235-6101 steel-aluminum bimetal drawing blank before drawing. The annealing temperature is 100° C., and the annealing time is 300 minutes. Then, the drawing process is cont...

Embodiment 2

[0039] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid steel, including the following steps:

[0040] Step 1. Perform thermal spraying zinc surface treatment on the solid 316L stainless steel preset material to be connected, and the thickness of the zinc layer is 15 μm;

[0041] Step 2, presetting the surface-treated solid 316L stainless steel at the required position in the mold cavity;

[0042] Step 3: Melt the A356 cast aluminum 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 70MPa to form a metallurgical bond between steel and aluminum;

[0043] Step 4. Perform annealing treatment on the obtained 316L-A356 steel-aluminum bimetallic drawing blank before drawing. The annealing temperature is 300°C, and the annealing time is 50 minutes. The tem...

Embodiment 3

[0047] This embodiment relates to a method for preparing a bimetallic composite material by solid-liquid compounding and drawing combination of solid steel, including the following steps:

[0048] Step 1. Perform thermal spraying zinc surface treatment on the solid 316L stainless steel preset material to be connected, and the thickness of the zinc layer is 50 μm;

[0049] Step 2, presetting the surface-treated solid 316L stainless steel at the required position in the mold cavity;

[0050] 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 680 ° C, and the squeeze casting pressure is 50 MPa, so that the metallurgical bond between steel and magnesium is formed;

[0051] Step 4, drawing the obtained 316L-AZ91 steel-magnesium bimetal, the process is direct drawing, the drawing temperature is 250°C, the diameter reduction ratio is 50 / 100, and the drawing sp...

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Abstract

The invention discloses a method for preparing a duplex metal composite material through solid-liquid compounding and drawing combination of solid steel. The method includes the steps that a duplex metal drawing blank is prepared through solid-liquid composite casting; and the duplex metal composite material is prepared through drawing. The method is characterized in that a process method of solid-liquid connection after protection of a surface zinc layer is used, a series of problems that air holes, burnthrough, too-thick intermediate compound layers and the like are prone to occurrence when steel and other materials are connected in a traditional welding method are solved, and the problem that the lower surface of the steel at a high temperature is prone to forming an oxidation film so that metallurgical bonding between the steel and the other materials can be blocked is solved; and then molding in a drawing method is carried out, intermediate compounds formed on an interface in the solid-liquid compounding process are crushed, and therefore the mechanical property and the physical property of the duplex metal composite material and a base material are improved. According to the method, gas protection is not needed, the composite technology is simple, the process condition is wide, operation is easy, the requirement for process equipment is simple, the interface bonding intensity is high, and the electric conduction property and the heat-conducting property are 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 casting and drawing combination, especially a method for preparing copper-steel bimetallic composite materials through solid-liquid composite casting and drawing combination process. Methods for metal composites. 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 p...

Claims

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Application Information

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IPC IPC(8): B23P13/02B22D19/16B21C23/00B21C31/00
CPCB23P13/02B21C23/002B21C23/005B21C31/00B22D19/16
Inventor 刘腾王渠东刘国平
Owner SHANGHAI JIAO TONG UNIV
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