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Spark plasma sintering system for powder metallurgy

A technology of discharge plasma and powder metallurgy, which is applied in the field of powder metallurgy, can solve problems such as insufficient pressure, lack of intelligent operation, and slow powder forming speed, and achieve the effects of good sealing, uniform and stable release, and accelerated forming speed

Pending Publication Date: 2022-02-18
宁波新睦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing spark plasma sintering technology heats and presses the raw material powder through pulse current, which provides insufficient pressure, resulting in a slow powder forming speed, and lacks an intelligent control system to realize the whole process of sintering intelligently. Chemical work

Method used

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  • Spark plasma sintering system for powder metallurgy
  • Spark plasma sintering system for powder metallurgy
  • Spark plasma sintering system for powder metallurgy

Examples

Experimental program
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Effect test

Embodiment 1

[0032] see Figure 1-4 , a discharge plasma sintering device for powder metallurgy, comprising a bottom plate 1, a loading frame 2 is arranged on the bottom plate 1, a sintering chamber 3 is arranged on the loading frame 2, a pressing mold mechanism 4 is arranged on the sintering chamber 3, and a pressing Die mechanism 4 is used for setting raw material powder;

[0033] Two hydraulic cylinders 502 are symmetrically arranged on the loading frame 2, and the two hydraulic cylinders 502 are both slidably arranged in the sintering chamber 3, and the upper electrode 5 and the lower electrode 501 are respectively arranged on the two hydraulic cylinders 502, and the upper electrode 5 and the lower electrode 501 are symmetrically arranged in the sintering chamber 3;

[0034] The sintering chamber 3 is also provided with a first through hole 301 , the bottom plate 1 is provided with a vacuum pump 6 , the vacuum pump 6 is provided with a first pipeline 601 , and the vacuum pump 6 is con...

Embodiment 2

[0037] see Figure 1-4 , the stamping mechanism 4 includes a mold 401 arranged in the sintering chamber 3, two stamping heads 402 are slidably arranged in the mold 401, and the two stamping heads 402 are symmetrically arranged in the mold 401, and the two stamping heads 402 are all provided with There are spacers 403 .

[0038] In this embodiment: there are two stamping heads 402 that slide symmetrically up and down in the mold 401, and gaskets 403 are arranged near the ends of the two stamping heads 402, and the raw material powder is placed between the two gaskets 403, and the two stamping heads 402 The farthest ends are in contact with the upper electrode 5 and the lower electrode 501 respectively. The raw material powder can be sintered into different shapes by selecting molds 401 and stamping heads 402 of different shapes. Insert into the mold 401 from the bottom, then weigh the raw material powder and pour it into it, then put another gasket 403 and another stamping hea...

Embodiment 3

[0042] see Figure 1-4 , the sintering chamber 3 is movably hinged with a door panel 303 through a hinge shaft, and an electromagnetic switch 304 is arranged on the door panel 303 .

[0043] In this embodiment: the opening and closing of the door panel 303 can be controlled by the electromagnetic switch 304, without manual switching of the door panel 303, and at the same time, the closing force generated by the electromagnetic switch 304 is also greater, so that the sealing of the sintering chamber 3 during sintering is better , to avoid heat dissipation and damage to the vacuum environment.

[0044] The sintering chamber 3 is also provided with a second through hole 302, the bottom plate 1 is provided with an inert gas input pump 7, the inert gas input pump 7 is provided with a second pipeline 701, and the inert gas input pump 7 passes through the second pipeline 701 and The second through hole 302 is connected.

[0045] In this embodiment: the sintering chamber 3 is also p...

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Abstract

The invention relates to the technical field of powder metallurgy, and discloses a spark plasma sintering system for powder metallurgy. The system comprises a bottom plate, a loading frame is arranged on the bottom plate, a sintering chamber is arranged on the loading frame, a die pressing mechanism is arranged on the sintering chamber, and the die pressing mechanism is used for shaping raw material powder; two hydraulic cylinders are symmetrically arranged on the loading frame; and a first through hole is further formed in the sintering cavity, a vacuum pump is arranged on the bottom plate, and a first pipeline is arranged on the vacuum pump. According to the spark plasma sintering system for powder metallurgy, the upper electrode and the lower electrode generate discharge plasma, discharge impact pressure and Joule heat, extra pressure is applied to raw material powder through the two hydraulic cylinders; and the forming speed of the raw material powder can be increased, and the whole-process intelligent operation of the sintering process is achieved through a control system composed of a terminal module, an execution module and a measurement module.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a discharge plasma sintering system for powder metallurgy. Background technique [0002] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. The powder metallurgy method has similarities with the production of ceramics, and both belong to the powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials. The spark plasma sintering is an advanced powder metallurgy method. The spark plasma sintering (SPS f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/00
CPCB22F3/105B22F3/003B22F2003/1051
Inventor 姚国强
Owner 宁波新睦科技有限公司
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