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Severe plastic deformation process for powder substances

A technology of severe plasticity and substance, applied in the field of powder materials, can solve the problems of low preparation density and low tensile strength, achieve good heating effect, high tensile strength, and improve the effect of tensile strength

Pending Publication Date: 2021-10-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and problems of low preparation density and low tensile strength existing in the prior art, and provide a severe plastic deformation process for preparing powder materials with high density and high tensile strength

Method used

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  • Severe plastic deformation process for powder substances
  • Severe plastic deformation process for powder substances
  • Severe plastic deformation process for powder substances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] see Figure 1 to Figure 8 , a severe plastic deformation process for a powdery substance, the severe plastic deformation process comprises the following steps:

[0055] Feeding steps of the powder material: firstly seal the discharge port 7 of the lower mold 2, and then inject the powder material from the feed port 6 of the lower mold 2 into the cavity 5 of the die, and the powder material is located in the cavity of the die In the channel 5; the compaction steps of the powder material: firstly, the upper mold 1 is moved vertically downward to drive the punch 3 on the upper mold 1 to move downward together, and then the lower punch 3 pairs the concave The powder material in the die channel 5 is extruded. During the pressing process of the punch 3, the powder material continues to be under the pressure exerted by the punch 3, and the pressed powder material moves down along the die channel 5, During the downward movement of the powdery material, the powdery material is ...

Embodiment 2

[0058] Basic content is the same as embodiment 1, the difference is:

[0059] see Figure 1 to Figure 8 , the bottom surface of the lower mold 2 and the top surface of the upper mold 1 are planar structures, the upper mold 1 is connected with the slide block of the press, the lower mold 2 is connected with the workbench of the press, and the upper mold 1 The bottom of the bottom is provided with a punch 3, the top of the lower mold 2 is provided with a die 4, the die 4 is provided with a die channel 5, and the top of the die 4 is provided with a feed port 6, the One side of the die 4 is provided with a discharge port 7, and the feed port 6 communicates with the discharge port 7 through the die passage 5; the die passage 5 includes a first vertical cavity 51, a second vertical cavity 52 , the third vertical cavity 53, the curved cavity 54 and the horizontal cavity 55, the first vertical cavity 51, the second vertical cavity 52, and the third vertical cavity 53 are connected in...

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Abstract

A severe plastic deformation process for powder substances comprises the steps of a powder substance feeding step, wherein firstly, a discharge port of a lower die is sealed, then the powder substances are injected into a female die channel from a feed port of the lower die, and at the moment, the powder substances are located in the female die channel; and a powder substance compaction step, wherein firstly, an upper die vertically moves from top to bottom so as to drive a male die on the upper die to move downwards together, then the powder substance in the female die channel are extruded by the male die moving downwards, the powder substances continuously bear pressure applied by the male die in the downward pressing process of the male die, the pressed powder substances move downwards along the female die channel, in the downward moving process of the powder substances, the powder substances firstly bear radial pressure and thrust, the powder substances continue to move in the female die channel and bear thrust, then the powder substances bear equal channel angular extrusion and thrust, and the powder substances continue to be compacted. According to the design, the preparation density is high, and the tensile strength is high.

Description

technical field [0001] The invention relates to the technical field of powder substances, in particular to a process for severe plastic deformation of powder substances, which is mainly suitable for improving the preparation density and tensile strength. Background technique [0002] Powder materials are mostly in the form of powder materials. Powder materials often need to be extruded so that they can be processed into required materials. Powder materials are compacted by extrusion methods, and then sintered. The strength is further strengthened, and materials with better performance are obtained. Powder materials can be used in a wide range of applications. Powder materials can be formed into new materials with good performance through the deformation process. [0003] Chinese patent, the application publication number CN201811275171.X, the application publication date is March 08, 2019. The invention application proposes a powder material molding method, wherein the powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B15/02B30B15/34
CPCB30B15/022B30B15/34
Inventor 左斯玉刘艳雄
Owner WUHAN UNIV OF TECH
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