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Metallic material acute plastic deformation extrusion die and using method of die

A severe plastic deformation, extrusion die technology, applied in metal extrusion die, metal extrusion, metal processing equipment and other directions, can solve the problems of extrusion test failure, reverse extrusion, etc., to achieve a wide range of use, easy to use, improve The effect of the test success rate

Pending Publication Date: 2020-04-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a mold for severe plastic deformation of metal materials and its use method, to solve the technical problem that the sample is back-extruded during the extrusion process, which leads to the failure of the extrusion test, and satisfies the Severe plastic deformation extrusion process of different metal materials, simple structure, easy processing

Method used

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  • Metallic material acute plastic deformation extrusion die and using method of die
  • Metallic material acute plastic deformation extrusion die and using method of die
  • Metallic material acute plastic deformation extrusion die and using method of die

Examples

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Effect test

example 1

[0051] In Example 1, under room temperature conditions, commercially pure titanium TA1 is processed into a φ20mm rod-shaped extrusion sample, and the rod-shaped extrusion sample is put into the vertical extrusion channel and the horizontal extrusion channel after rough grinding, fineness and polishing In the severe plastic deformation mold with an included angle of 135°; the inside of the extrusion channel is evenly coated with MnS 2 + Graphite milk mixed lubricant, then put the mold with the rod-shaped extrusion sample on the test bench, set the extrusion speed to 3.5mm / s, turn on the testing machine at room temperature for extrusion test, wait for the rod-shaped sample After the deformation is completed, stop the machine, open the extrusion die and take out the deformed extrusion sample.

[0052] The deformed extruded sample was prepared as a transmission electron microscope sample, and the structure of the industrial pure titanium sample was observed by the transmission ele...

example 2

[0054] In Example 2, commercially pure titanium is processed into a rectangular plate-shaped sample of 18×20×150 mm at room temperature, and the rectangular plate-shaped sample is put into a vertical extrusion channel and laterally extruded after rough grinding, fineness and polishing In a severe plastic deformation mold with a channel angle of 120°; MnS is evenly coated inside the extrusion channel 2 Lubricant mixed with graphite milk in a certain proportion, then put the extrusion die equipped with a rectangular plate sample on the test bench, set the extrusion speed to 2mm / s, and turn on the testing machine at room temperature for extrusion test After the deformation of the rectangular plate sample is completed, stop the machine, open the mold and take out the extruded sample of industrial pure titanium after extrusion deformation.

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Abstract

The invention discloses a metallic material acute plastic deformation extrusion die and a using method of the die. The die comprises an extrusion barrel, an extrusion stem, an extrusion stem die holder and an extrusion cushion block. Extrusion channels are arranged in the extrusion barrel. An extrusion sample is arranged in the extrusion channels. The extrusion channels include the vertical extrusion channel and the transverse extrusion channel. The upper end of the vertical extrusion channel communicates with the upper surface of the extrusion barrel. The lower end of the vertical extrusion channel communicates with one end of the transverse extrusion channel. The other end of the transverse extrusion channel communicates with the surface of the side wall of the extrusion barrel. The extrusion stem penetrates through the vertical extrusion channel. The upper end of the extrusion stem is fixedly connected with the extrusion stem die holder. The lower end of the extrusion stem makes contact with the extrusion sample. The extrusion cushion block is arranged between the extrusion stem and the extrusion sample. According to the metallic material acute plastic deformation extrusion dieand the using method of the die, because the extrusion cushion block is arranged between the extrusion stem and the extrusion sample, during testing, it is avoided that a test fails because an extrusion sample is reversely extruded in the extrusion process, extrusion force is reduced, the test success rate is increased, and a test result is accurate.

Description

technical field [0001] The invention relates to the technical field of severe plastic deformation of metal materials, in particular to a mold for severe plastic deformation of metal materials and a use method thereof. Background technique [0002] Ultra-fine crystal / nanocrystalline metal materials have a series of advantages such as high strength, wear resistance, excellent fatigue performance and creep performance, and have a very wide application prospect in aerospace, automobile and shipbuilding, biomedical and other industries. The preparation of ultra-fine-grained / nano-crystalline metallic materials is accomplished by extrusion dies with severe plastic deformation. The traditional severe plastic deformation extrusion die has a complex structure, cumbersome preparation process, and low yield, which greatly limits the application range of ultrafine crystal / nanocrystalline metal materials; Larger, poor fit, resulting in back-extrusion of the metal material during the extr...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C26/00B21C23/00
CPCB21C23/001B21C25/02B21C26/00
Inventor 罗雷段西明吴维维杨西荣刘晓燕王苗张琪高飞龙王敬忠
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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