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Real-time online heating constant temperature equal channel angular extrusion device and method

A technology of equal-channel corners and extrusion devices, which is applied in the direction of metal extrusion dies, can solve the problems of uncontrollable temperature of extrusion materials, high preparation cost of ultra-fine-grained materials, and lower temperature, so as to improve energy utilization and extrusion Compression efficiency, improvement of preparation efficiency and energy utilization, and effect of reduction in ejection load

Active Publication Date: 2021-03-09
SHANDONG UNIV
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Problems solved by technology

The advantage of non-isothermal angular extrusion is that the mold structure is simple and the operation process is flexible. The disadvantage is that during the transfer and extrusion process of the material, due to the inconsistency between the ambient temperature and the mold temperature, the temperature drops and the temperature distribution is uneven. Extrusion The temperature of the material is uncontrollable, which may easily cause cracks on the surface of the sample material, making it impossible to carry out multi-pass repeated extrusion deformation
The process of constant-temperature equal-channel angular extrusion is controllable, and the surface quality of the material after extrusion deformation is good, which is conducive to the accumulation of large plastic deformation through repeated extrusion deformation in multiple passes. However, the mold structure of this method is complicated, especially for high-strength alloys such as titanium alloys. Equal-channel angular extrusion of metal materials requires high extrusion temperature, high requirements on the high temperature resistance of the mold, easy wear of the mold, high energy consumption, and high production cost of ultra-fine-grained materials

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  • Real-time online heating constant temperature equal channel angular extrusion device and method
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  • Real-time online heating constant temperature equal channel angular extrusion device and method

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[0044] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0045] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, their Indicate the presence of features, steps, operations, means, components and / or combinations thereof;

[0046] For the convenience of description, if the words "up", "down", "left" and "right" appear in th...

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Abstract

The invention discloses a real-time online heating constant temperature equal channel angular extrusion device and method. The device comprises a heating body, an insulating sleeve, an extrusion die,a die sleeve, a die fixing seat and an extrusion rod. The extrusion die is cone-shaped integrally and is mounted in the die sleeve, the die sleeve is fixedly connected to the die fixing seat, an extrusion channel is arranged in the extrusion die, the extrusion bar is matched with the extrusion channel, the extrusion channel is composed of an extrusion-in channel, an extrusion channel and an extrusion corner, the cross section of the extrusion channel is smaller than that of the extrusion-in channel; the extrusion corner is formed in a connecting position of the extrusion-in position and the extrusion channel, and the angle of the extrusion corner is 90-150 degrees; and a duct is arranged around the extrusion channel, the insulating sleeve is placed in the duct, and the heating body is arranged in the insulating sleeve.

Description

technical field [0001] The invention relates to the field of metal plastic deformation, in particular to an on-line heating constant-temperature equal-channel angular extrusion device and method. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The equal channel angular extrusion technology is a special method for refining the grain structure of materials by using severe plastic deformation. This technology was proposed by former Soviet scientist Segal in 1977, and its original purpose was to prepare bulk ultrafine-grained metal materials. The basic principle is that the material undergoes almost pure shear plastic deformation at the corner of the channel, so that Grain It is refined, the mechanical and physical properties are improved, and the cross-sectional shape and size of the sample before and after deformation can be kept unchanged, so mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C29/04B21C23/00B21C23/32
CPCB21C25/02B21C29/04B21C23/001B21C23/32
Inventor 赵志勇高军褚兴荣岳振明
Owner SHANDONG UNIV
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