Pulse current assisted equal-diameter angular extrusion equipment and method

A technology of equal-diameter angular extrusion and pulse current, which is applied in the direction of metal extrusion dies, etc., can solve the problems that cannot be completely solved in the equal-diameter angular extrusion process, and achieve the effects of continuous and efficient processing, rapid heating, and improved strength and plasticity

Inactive Publication Date: 2019-11-22
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, these solutions still cannot completely solve a series of problems in the equal radial angle extrusion process

Method used

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  • Pulse current assisted equal-diameter angular extrusion equipment and method
  • Pulse current assisted equal-diameter angular extrusion equipment and method
  • Pulse current assisted equal-diameter angular extrusion equipment and method

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Embodiment

[0053] Taking the pulse current-assisted equal angular extrusion processing of AZ61 magnesium alloy billet as an example, the implementation of the patent is described in detail.

[0054] 1. Assemble the concave mold and punch of the equal diameter angular extrusion equipment according to the description of the above specific embodiment, and place the concave mold on the horizontal anvil of the press.

[0055] 2. Cut out a number of quadrangular prism-shaped blanks with a size of 16mm×16mm×70mm on the AZ61 magnesium alloy ingot that has undergone solution heat treatment, and fully polish the surface with sandpaper until the surface is smooth. After smearing the grease containing molybdenum disulfide on the surface of the blank, put the blank into the longitudinal channel of the die.

[0056] 3. Apply a layer of synthetic grease containing molybdenum disulfide on the outer surface of the insulating sleeve of the punch, and press the assembled punch into the die, so that the AZ6...

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Abstract

The invention relates to pulse current assisted equal-diameter angular extrusion equipment and method, and belongs to the field of metal material processing. An inner corner module insulation bushinginsulates an inner corner conductive module from the rest of a mold; a male mold insulating sleeve and a longitudinal channel insulation bushing are arranged so that it can be ensured that a metal blank is insulated from a male die pressing rod and a female mold longitudinal channel; the inner corner conductive module and a combined type female mold sleeve are connected to two poles of a pulse power supply correspondingly; the metal blank is in contact with inner and outer corners in the deformation process to be connected into a circuit, and blanks at the corners participate in conduction; and the pulse power supply should have the good adjustment performance, and the temperature of blanks in a deformation zone is controlled by adjusting pulse current parameters in the extrusion processing procedure. Pulse current is used for replacing traditional mold heating, plastic deformation of the metal blanks at the corners is used for assistance, wrinkles and cracks are prevented, the yield is improved, energy consumption is saved, and continuous and efficient processing is achieved; and the overheating growth of crystal grains is effectively suppressed, uniform and fine grains are obtained, and the strength and plasticity are greatly improved.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to the field of improving the mechanical properties of metal materials through plastic deformation, especially a pulse current-assisted equal-diameter angular extrusion equipment and method. Background technique [0002] Large plastic deformation technology (SPD) effectively refines the grains of metal materials by accumulating plastic strain, and obtains an effective combination of high strength and high plasticity. Equal angular extrusion technology (ECAP) is considered to be the most promising SPD method for industrial applications due to its advantages such as simple equipment, remarkable thinning effect, easy multi-pass deformation, and the ability to prepare large-size bulk materials. [0003] After searching the current literature reports, it is found that many scholars have successfully prepared copper alloys and aluminum alloys with ultra-fine grain struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/18B21C25/02B21C23/32
CPCB21C23/18B21C23/32B21C25/02
Inventor 张平宇徐虹黄钰周游国志鹏
Owner JILIN UNIV
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