Preparation method for improving friction and wear properties of 6xxx series aluminum alloy

A friction and wear, aluminum alloy technology, which is applied in the field of preparation of improving the friction and wear properties of 6xxx series aluminum alloys, can solve the problems of low friction and wear properties, low manufacturing costs, etc., and achieves improved friction and wear properties, reduced energy consumption, and high plastic toughness. Effect

Inactive Publication Date: 2018-09-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the problem of low friction and wear properties of the existing 6xxx series Al-Mg-Si-Cu aluminum alloys, to provide ultra-fine grain 6xxx series Al-Mg-Si-Cu alloys with high friction and wear properties. A new preparation method of Cu aluminum alloy, by changing the chemical composition of 6xxx series Al-Mg-Si-Cu aluminum alloy, adopting dynamic aging of equal channel angular extrusion at different temperatures after solution quenching, to refine the grain size of 6xxx series aluminum alloy To the ultra-fine grain size of less than 260nm, and introduce a spherical

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  • Preparation method for improving friction and wear properties of 6xxx series aluminum alloy
  • Preparation method for improving friction and wear properties of 6xxx series aluminum alloy
  • Preparation method for improving friction and wear properties of 6xxx series aluminum alloy

Examples

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Effect test

Embodiment 1

[0071] Example 1 (dynamic aging at 170°C)

[0072] The 6xxx series Al-Mg-Si-Cu aluminum alloy is cast into a round billet with a diameter of 100mm, processed into a profile with a size of 80×80×300mm by turning, and the profile is processed in a circulating air resistance furnace for 520 Homogenization treatment at ℃×24h, the homogenized profile is subjected to solution treatment and water quenching at 530°C×2h in a circulating air resistance furnace, and then the profile after solution quenching is immediately subjected to equal-channel angular extrusion dynamics Aging, the temperature of dynamic aging for equal channel angular extrusion is 170°C, the process of equal channel angular extrusion is: the inner intersection angle of two channels Φ = 90°, the outer arc angle Ψ = 0°, extrusion 4 passes, extrusion The speed is 5mm s -1 , followed by the average grain size determination, tensile test and friction and wear test of the 170 °C equal channel angular extrusion dynamicall...

Embodiment 2

[0075] Example 2 (dynamic aging at 110°C)

[0076] The 6xxx series Al-Mg-Si-Cu aluminum alloy is cast into a round billet with a diameter of 100mm, processed into a profile with a size of 80×80×300mm by turning, and the profile is processed in a circulating air resistance furnace for 520 Homogenization treatment at ℃×24h, the homogenized profile is subjected to solution treatment and water quenching at 530°C×2h in a circulating air resistance furnace, and then the profile after solution quenching is immediately subjected to equal-channel angular extrusion dynamics Aging, the temperature of dynamic aging for equal channel angular extrusion is 110°C, the process of equal channel angular extrusion is: the inner intersection angle of two channels Φ = 90°, the outer arc angle Ψ = 0°, 4 passes of extrusion, extrusion The speed is 5mm s -1 , followed by 110 ° C equal channel angular extrusion dynamic aging of the aluminum alloy for the determination of the average grain size, tensil...

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Abstract

The invention belongs to the technical field of metal and alloy preparation, and relates to a preparation method for improving friction and wear properties of 6xxx series aluminum alloy. The preparation method is characterized in that chemical compositions of a 6xxx series Al-Mg-Si-Cu aluminum alloy are changed; the method comprises the steps: firstly casting the aluminum alloy to form an as-castblank, then, turning the as-cast blank into an equa-channel angular pressing profiled bar, and carrying out homogenization treatment and solid solution quenching treatment; subsequently, carrying outequa-channel angular pressing dynamic aging treatment of 2 to 6 passes on the profiled bar at 50-180 DEG C immediately after the solid solution quenching treatment is carried out. According to the invention, by equal-channel angular pressing dynamic aging at different temperatures, the grain size of the alloy is remarkably thinned, and the morphology and distribution of a nano-aging precipitated phase are more reasonable; through fine grain strengthening, nano-precipitated phase beta' and interaction with dislocation, the strength, ductility and toughness of the alloy are significantly improved, and thereby the friction and wear properties of the alloy are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of metals and alloys, and relates to a preparation method for improving the friction and wear properties of 6xxx series aluminum alloys. Background technique [0002] According to statistics, about 1 / 3 to 1 / 2 of the world's energy consumption is in various forms of friction, and about 80% of component failures are caused by various forms of wear. With the advancement of science and technology, the requirements for the wear resistance of materials are getting higher and higher. How to improve the wear resistance of materials and develop materials with better wear resistance has become a development direction of material science research. [0003] Aluminum alloy has the advantages of low density, high specific strength, excellent electrical and thermal conductivity, and good formability. As an important lightweight metal material, it has been widely used in aerospace, marine ships, petrochemical...

Claims

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Application Information

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IPC IPC(8): C22F1/043C22C21/02
CPCC22F1/043C22C21/02
Inventor 刘满平程晓农孙少纯张振亚焦雷刘强
Owner JIANGSU UNIV
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