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An Ultrasonic-Assisted Equal Channel Angular Stretch Processing Method

An equal channel angle, ultrasonic-assisted technology, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve problems such as lowering the pulling force, and achieve the effect of greatly reducing the pulling force, softening and deformation resistance, and facilitating continuous processing.

Active Publication Date: 2022-03-08
ANHUI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide an ultrasonic-assisted equal-channel angular stretching treatment method, which takes metal or metal-based foils and thin wires as objects, and develops a new continuous equal-channel tensioning method based on the ECAD method combined with ultrasonic vibration. The channel angle stretching device and technology improve the above-mentioned shortcomings of the current channel angle stretching technology through the characteristics brought about by ultrasonic vibration: use the reciprocating forging in the vertical direction of the ultrasonic to destroy the bending mechanism in the process of corner stretching deformation, eliminate The thinning behavior of the angular stretching process; the discontinuous contact between the vibration process that constitutes the upper surface of the channel and the surface of the foil is used to reduce the frictional resistance that needs to be overcome during the drawing process, and the required drawing force is greatly reduced. Finally, in Continuous scale-up SPD processing without thinning on thin-layer metals

Method used

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  • An Ultrasonic-Assisted Equal Channel Angular Stretch Processing Method
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  • An Ultrasonic-Assisted Equal Channel Angular Stretch Processing Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Ultrasonic-assisted equal-channel angular stretching of 100 micron T2 rolled copper foil, the device system such as figure 2 with 3 As shown, this ultrasonic-assisted equal-channel angular stretching processing method comprises the following steps:

[0053] (1) Clean the surface of T2 rolled copper foil to remove dirt;

[0054] (2) Apply inert lubricating oil on the surface of copper foil to form an oil film for protection and lubrication;

[0055] (3) The intersection angle of the V-shaped channel of the ultrasonic-assisted equal-channel angular stretching device is 90°, the amplitude of the ultrasonic impact head is 20 microns, and the vibration frequency is 20KHZ; the angular thickness of the channel is 120 microns; the V-shaped ultrasonic tool punch and V-shaped The base is made of high-hardness and wear-resistant high-carbon steel; water cooling is used to cool down;

[0056] (3) Turn on the ultrasonic device of the processing system, and pass the foil forward ...

Embodiment 2

[0062] Ultrasonic-assisted equal-channel angular stretching of 50 micron 304 stainless steel foil, the device system such as figure 2 with 3 As shown, this ultrasonic-assisted equal-channel angular stretching processing method comprises the following steps:

[0063] (1) Clean the surface of the stainless steel foil to remove dirt;

[0064] (2) Apply inert lubricating oil on the surface of the steel foil to form an oil film for protection and lubrication;

[0065] (3) The intersection angle of the V-shaped channel of the ultrasonic-assisted equal-channel angular stretching device is 120°, the amplitude of the ultrasonic impact head is 15 microns, and the vibration frequency is 28KHZ; the angular thickness of the channel is 65 microns; the V-shaped ultrasonic tool punch and V-shaped The base is made of high hardness and wear-resistant hard alloy tungsten steel; it is cooled by water;

[0066] (3) Turn on the ultrasonic device of the processing system, and pass the foil forwa...

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Abstract

The invention discloses an ultrasonic-assisted equal-channel angular stretching processing method. Aiming at defects such as bending in the angular stretching process and inherent deformation of the stretching deformation in the conventional equal-channel angular stretching process, the present invention The bending mechanism in the conventional equal-channel angular stretching process is replaced by ultrasonic impact forging with a direction perpendicular to the continuous shear plane; finally, the foil or wire can be repeated for multiple passes without obvious cross-sectional thinning Large effective plastic deformation can be obtained through the channel corner area of ​​equal cross-section, the effect of obtaining ultra-fine grain and improving the original texture structure, and the reduction of required pulling force is convenient for continuous processing, which has practical engineering application value.

Description

technical field [0001] The invention relates to the technical field of severely plastically deformed fine grains, in particular to an ultrasonic-assisted equal-channel angular stretching treatment method. Background technique [0002] Refinement of grains can not only improve the strength of the material, but also improve the plasticity, which has always been a research hotspot in metal structural materials. Grain refinement is an effective means to improve material properties, and traditional pressure processing techniques (such as rolling, extrusion, drawing, and forging, etc.) can refine grains (micron scale). Nanostructured metals exhibit excellent physical and mechanical properties due to their small grain size (20---500nm) and unique defect structure. [0003] Severe plastic deformation (Sever Plastic Deformation—SPD) has great potential to refine the grains of coarse-grained materials to the nanometer level, and is a unique ultrafine particle (nanocrystalline and sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J3/00B21D33/00B21D37/18B21C37/04C21D1/32
CPCB21J5/002B21J3/00B21D33/00B21D37/18B21C37/04C21D1/32
Inventor 陈志浩刘洋曹伟朱协彬姚敏
Owner ANHUI POLYTECHNIC UNIV
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