Pulse discharge flash sintering metal-based part near-net forming technology method

A technology of pulse discharge and sintering metal, which is applied in the field of powder metallurgy, can solve the problems of insufficient attention to technology and achieve the effects of simplified process flow, low power utilization rate and high product quality

Inactive Publication Date: 2019-06-18
YANGZHOUSSHINE POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in my country, only the Institute of Metal Research, Chinese Academy of Sciences has carried out basic research work on the technology of sintering WC-Co, and domestic attention to this technology is seriously insufficient.

Method used

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  • Pulse discharge flash sintering metal-based part near-net forming technology method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. Calculating the powder loading amount of metal powder for manufacturing iron-based gears through the theoretical powder density;

[0043] b. Prepare the mold 3 and die punch matched with the iron-based gear in advance, push the metal powder in step a into the mold 3 by the feeding device 6, and shape the metal powder by the die punch; use the die punch as The electrode of the pulse discharge body, which performs pulse discharge synchronously on the metal powder during the molding process; that is, the die punch includes the upper die punch 4 and the lower die punch 5, and the upper die punch 4 and one of the electrodes of the pulse capacitor bank 2 Electrical connection, the lower die punch 5 is electrically connected to the other electrode of the pulse capacitor bank 2; the pulse capacitor bank 2 is charged during the metal powder pushing process and / or the mold punching and ejection process; the pulse current waveform generated by the discharge of the pulse capacito...

Embodiment 2

[0049] a. Calculating the powder loading amount of metal powder for manufacturing iron-based gears through the theoretical powder density;

[0050] b. Prepare the mold 3 and die punch matched with the iron-based gear in advance, push the metal powder in step a into the mold 3 by the feeding device 6, and shape the metal powder by the die punch; use the die punch as The electrode of the pulse discharge body, which performs pulse discharge synchronously on the metal powder during the molding process; that is, the die punch includes the upper die punch 4 and the lower die punch 5, and the upper die punch 4 and one of the electrodes of the pulse capacitor bank 2 Electrical connection, the lower die punch 5 is electrically connected to the other electrode of the pulse capacitor bank 2; the pulse capacitor bank 2 is charged during the metal powder pushing process and / or the mold punching and ejection process; the pulse current waveform generated by the discharge of the pulse capacito...

Embodiment 3

[0055] a. Calculating the powder loading amount of metal powder for manufacturing iron-based gears through the theoretical powder density;

[0056] b. Prepare the mold 3 and die punch matched with the iron-based gear in advance, push the metal powder in step a into the mold 3 by the feeding device 6, and shape the metal powder by the die punch; use the die punch as The electrode of the pulse discharge body, which performs pulse discharge synchronously on the metal powder during the molding process; that is, the die punch includes the upper die punch 4 and the lower die punch 5, and the upper die punch 4 and one of the electrodes of the pulse capacitor bank 2 Electrical connection, the lower die punch 5 is electrically connected to the other electrode of the pulse capacitor bank 2; the pulse capacitor bank 2 is charged during the metal powder pushing process and / or the mold punching and ejection process; the pulse current waveform generated by the discharge of the pulse capacito...

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Abstract

The invention discloses a pulse discharge flash sintering metal-based part near-net forming technology method, and belongs to the technical field of powder metallurgy. The problems that a traditionalpowder metallurgy part production process is high in power consumption, tedious and complex in process flow and low in production efficiency are solved. The method mainly comprises the steps of pushing metal powder into a mold, and forming the metal powder through stamping; enabling the inner wall, making contact with the metal powder, of the mold to have the insulation property; and enabling stamping to serve as an electrode of a pulse discharge body, and enabling stamping to synchronously carry out pulse discharge in the metal powder forming process. According to the method, the process flowis greatly simplified, large-scale industrialized application is easily achieved, the near-net forming advantage is achieved, the product quality is high, porosity adjusting control is convenient, practicality is high, and the method has the important significance in the powder metallurgy industry manufacturing field.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular, relates to a pulse discharge flashlight that effectively reduces energy consumption, simplifies the process flow, integrates molding / sintering, has low upgrading cost, high product quality, and greatly improves production efficiency. A near-net-shape process for sintered metal-based components. Background technique [0002] The production process of traditional powder metallurgy parts generally includes steps such as material preparation, forming, sintering, heat treatment, and surface treatment in sequence. The sintering equipment is usually an electric furnace, which has disadvantages such as high energy consumption, low utilization rate of electric energy, slow heating and cooling rate, and long holding time, which greatly limit the production efficiency and product performance of powder metallurgy parts. Due to the low density of traditional powder metallurgy pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00
Inventor 张新房黄雁宇梁艺涵游进明翟高华
Owner YANGZHOUSSHINE POWDER METALLURGY
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