Large equal channel angular large-strain extrusion die

A technology with equal channel angle and large strain, applied in the direction of metal extrusion dies, etc., can solve the problems that low-hardness materials cannot achieve continuous production, lack of large-scale dies, and difficult to achieve industrialized production, etc. Toughness, smooth extrusion without blocking effect

Active Publication Date: 2010-04-14
JIANGSU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to design a kind of equipment that can carry out equal-channel angular extrusion in batches continuously in view of the problems that the existing equal-channel angular extrusion processing lacks large-scale molds, which makes it difficult to realize industrial production and the continuous production of low-hardness materials. Large-scale equal-channel angular extrusion processing dies provide necessary equipment for realizing industrial production and utilization of equal-channel angular extrusion processing to greatly improve the structure and properties of metal materials

Method used

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  • Large equal channel angular large-strain extrusion die

Examples

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example 1

[0031] Example 1: The channel diameter of the equal-channel angular extrusion die is 90 mm, the inner angle φ of the mold is 120 degrees, and the outer angle ψ of the mold is 30 degrees. It can smoothly carry out continuous equal-channel large-strain extrusion processing of cast 3003Al and 6063Al with a diameter of 90mm, and crush the inclusions (AlFeMnSi) to less than 3μm and disperse them (see image 3 , 4 ).

example 2

[0032] Example 2: The channel diameter of the equal channel angular extrusion die is 20 mm, the inner angle φ of the die is 110 degrees, and the outer angle ψ of the die is 25 degrees. Continuous equal-channel large-strain extrusion processing can be carried out smoothly on as-cast 3003Al and 6063Al with a diameter of 20mm, and the hardness of 6063Al increases from 58.8Hv to 94.2Hv.

example 3

[0033]Example 3: The channel diameter of the equal channel angular extrusion die is 20 mm, the inner angle φ of the die is 100 degrees, and the outer angle ψ of the die is 24 degrees. The continuous equal-channel large-strain extrusion processing of as-cast 3003Al and 6063Al with a diameter of 20mm can be carried out smoothly, and the hardness of 6063Al increases from 58.8Hv to 96Hv.

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Abstract

The invention relates to a large equal channel angular large-strain extrusion die comprising an upper die holder (7), a die case (2), a punch (10) and a lower die holder (4). The large equal channel angular large-strain extrusion die is characterized in that the upper end of the punch (10) is fixedly mounted in a punch fixing board (12); the upper die holder (7), a punch backing plate (6) and the punch fixing board (12) are tightly connected to form a whole body; a front die core (15) and a rear die core (18) are embedded in the die case (2); the lower end of the punch (10) is inserted in an extrusion cavity (19) formed between the front die core (15) and the rear die core (18); the die case (2) is provided with a slantwise arranged extrusion channel (20) which is communicated with the extrusion cavity (19) and embedded in the lower die holder (4); the front die core (15), the rear die core (18) and the die case (2) are in taper fit; the lower die holder (4) is connected with the die case (2); and a discharge cavity (21) which is communicated with the extrusion channel (20) on the die case (2) is arranged on the lower die holder (4). The invention has the advantages of high strength, smooth extrusion and simple structure.

Description

technical field [0001] The invention relates to a metal material modification processing die, in particular to a large-diameter channel extrusion die which utilizes equal-channel extrusion deformation to change the material structure, in particular to a large-scale equal-channel push-type continuous extrusion Corner high strain extrusion die. Background technique [0002] As we all know, since the mid-1990s, Equal Channel Angular Pressing (ECAP) technology has been highly valued by the global material community, and has now developed into an important method for preparing high-performance metal materials. The processing of materials by ECAP technology has the characteristics of large shear force, large shear strain, efficient refinement of material structure and inclusions, and elimination of hole defects, and the processed materials have basically unchanged geometric shape, high strength, and good plasticity , good formability, good fatigue performance, good corrosion resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02
Inventor 许晓静张增雷成城潘励樊曙天姜银方袁国定刘桂玲戴亚春戈晓岚王宏宇程晓农
Owner JIANGSU UNIV
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