A method for preparing large-scale functional gradient materials by friction stir

A gradient functional material and friction stir technology, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of large pollution, cumbersome preparation process, and loose interface assembly, and achieve low energy consumption, simple process, The effect of avoiding pores

Inactive Publication Date: 2019-10-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at a series of problems such as expensive equipment, cumbersome preparation process, high cost, low energy utilization rate, large pollution, limited size of prepared materials, and loose interface assembly in the traditional preparation method of functionally gradient materials, the purpose of the present invention is to develop a A kind of preparation method of high-quality, large-size gradient functional material with simple process, low energy consumption, and environmental protection

Method used

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  • A method for preparing large-scale functional gradient materials by friction stir
  • A method for preparing large-scale functional gradient materials by friction stir
  • A method for preparing large-scale functional gradient materials by friction stir

Examples

Experimental program
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Effect test

Embodiment 1

[0062] This example prepares an aluminum / magnesium gradient functional material. Since the difference between the melting points of magnesium and aluminum is less than 500°C, the AZ31 magnesium alloy uses a solid plate. The specific preparation steps are as follows:

[0063] Step 1: If figure 1 As shown, select a plate A with a composition of Al6061 and a thickness of 5mm 1 and a plate B with a thickness of 1 mm of AZ31 magnesium alloy 1 , put A 1 and B 1 Grinding, cleaning and drying the surface to remove surface oil to facilitate processing, the A 1 and B 1 After stacking, it is clamped on the workbench and waits for processing;

[0064] Step 2: Select Stirring Head D 1 , the length of the stirring needle is 4.9mm, the diameter of the shoulder is 22mm, and the pressing amount of the shoulder used during processing is 0.1mm, the effective stirring depth is 5mm, specifically as figure 2 As shown, the position of the dotted line indicates the interface between the stirr...

example 1

[0067] Example 1 successfully prepared the aluminum / magnesium gradient functional material with successively increasing volume fractions of 6 layers of magnesium alloys, specifically as Figure 4 shown. The volume fraction of magnesium alloy in each layer can be calculated by the formula: 0, 20%, 36%, 48.8%, 59.04%, 67.23%; the thickness of each layer is 1mm, 1mm, 1mm, 1mm, 1mm, 5mm respectively.

Embodiment 2

[0069] This example prepares a SiC / aluminum alloy gradient material. Since the melting point difference between SiC and aluminum exceeds 500°C, SiC should be in powder form. The specific preparation steps are as follows:

[0070] Step 1: If figure 1 As shown, select a plate A with a composition of Al6061 and a thickness of 5mm 1 Spray SiC powder (average particle size 10 μm) with an average thickness of 0.08 mm on a plate with a composition of Al6061 and a thickness of 1 mm to form a plate B 1 , the plate A 1 and plate B with ingredient B powder 1 Laminate so that the SiC powder is between two sheets, placing sheet A 1 and plate B with ingredient B powder 1 Clamped on the workbench, waiting for processing;

[0071] Step 2: Select Stirring Head D 1 , the length of the stirring needle is 4.9mm, the diameter of the shoulder is 22mm, and the pressing amount of the shoulder used during processing is 0.1mm, the effective stirring depth is 5mm, specifically as figure 2 As sho...

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Abstract

The invention discloses a method for preparing large-size functionally graded materials through stirring and friction. A series of problems that in an existing preparation method, the cost is high, the energy utilization rate is low, contamination is large, the material size is small, and combination of an air hole and an interface is not tight are solved. By means of the heating, plasticizing, stirring and extruding effects in the stirring and friction machining process, two or more layers of different materials are partially mixed to be uniform into a layer of materials of different ingredients, on the basis, one or more layers of materials are stacked, stirring and friction are performed, and therefore another layer of materials of different ingredients is manufactured; due to repeatedmachining, the multiple layers of tightly-combined functionally graded materials of different ingredients are formed, and the method is easy to implement and control, environmentally friendly and capable of being industrially applied conveniently.

Description

technical field [0001] The invention belongs to the field of gradient material preparation, and relates to a method for preparing gradient functional materials by stirring friction, in particular to a preparation method for large-sized gradient functional materials. Background technique [0002] With the advancement of modern science and technology and the development of society, the competitiveness of materials science has gradually become one of the criteria for measuring a country's high-tech capabilities and development prospects. Gradient functional materials are a major research hotspot in the field of material preparation by contemporary scholars. Nowadays, functionally graded materials have been widely used in bioengineering, mechanical engineering, optoelectronic engineering, nuclear engineering and other fields. Examples of main applications include artificial teeth, inner walls of aerospace engines, knives, first wall materials of nuclear reactors, etc. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12B23K20/22B23K20/233
Inventor 呼咏吴彤王文阳赵宏伟王宇付忠国曹勇陈思远杨峥郭锦洲
Owner JILIN UNIV
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