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A mold and method for preparing a porous metal material body

A porous metal and green body technology, applied in the field of material processing and manufacturing, can solve the problems of shortened service life, failure to operate, unstable performance, etc., and achieve the effects of reduced production costs, reasonable mold structure, and complete shape

Active Publication Date: 2019-12-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current preparation methods of porous metal materials are extrusion forming and compression molding. In these two methods, different formulations of binders added to the raw metal powder during the preparation process can solve the problem that the final formed porous metal material can not be cracked or cracked. The disadvantage of layering, but with the addition of the binder, the binder needs to be removed during later sintering, which increases the difficulty of the sintering process. Increase the sintering temperature or prolong the sintering time, or in the sintering process It needs to be carried out in multiple stages, but the binder still remains in the final porous metal material, which will lead to unstable performance of the material, shortened service life, pollution of the use medium, etc.
Most of the existing molds for preparing porous metal materials use a mold body with a cavity and a mold cover plate for loading raw materials. A mold needle is designed at the bottom of the mold body. When demoulding, the mold is buckled upside down on the platform, and then the mold body is removed. , to get the green body, but there is a process of overturning and undercutting in the demoulding process, and the mold cover plate after extrusion is embedded in the mold body. When undercutting, the green body will fall from the die needle under the influence of its own weight Falling down, this will cause the body to vibrate when it falls on the platform, which may cause damage to the content of the body, and may not be able to line up after sintering. Therefore, it is necessary to design a porous metal material that can obtain no cracks and no points. layered porous metal material body

Method used

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  • A mold and method for preparing a porous metal material body
  • A mold and method for preparing a porous metal material body
  • A mold and method for preparing a porous metal material body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 , figure 2 and image 3 A mold for preparing a porous metal material blank is shown, including a base plate 5, a lining plate 8 fixedly arranged on the base plate 5, and a release plate 3 inverted on the lining plate 8, and the top center of the lining plate 8 is A groove is opened at the position, and a needle plate 6 is placed in the groove, and a plurality of mold needles 7 passing through the top of the stripping plate 3 are arranged on the needle plate 6, and the top of the stripping plate 3 is provided with a useful On the female mold 1 loaded with metal powder, the female mold 1 is provided with a female mold pressing plate 2, the outer periphery of the stripping plate 3 is fixedly provided with a handle 4, and the inner side of the stripping plate 3 is provided with a slider 9. The liner 8 is provided with a chute corresponding to the position of the slider 9, and the horizontal cross-section of the die pin 7 is circular, square or hexagonal....

Embodiment 2

[0032] The preparation method of the porous metal material green body in this embodiment includes the following steps:

[0033] Step 1. Evenly pack 350-mesh iron-chromium-aluminum metal powder into the female mold 1 of the mould, and then cover the female mold pressing plate 2;

[0034] Step 2: first use a hydraulic press to compact the iron-chromium-aluminum metal powder in the mold with a pressure of 300 MPa, then slide the stripping plate 3 upwards through the handle 4 to separate the stripping plate 3 from the lining plate 8, and then place the stripping plate 3 Place on the platform for 10 minutes, then open the female mold 1, and finally remove the female mold pressing plate 2 to obtain a porous iron-chromium-aluminum metal body.

[0035] The porous iron-chromium-aluminum metal material body obtained in this example has no cracks, no delamination, and is integral and free of defects. The porous iron-chromium-aluminum metal material body is placed in a sintering furnace a...

Embodiment 3

[0037] The preparation method of the porous metal material green body in this embodiment includes the following steps:

[0038] Step 1. Evenly pack 200-mesh iron-chromium-aluminum metal powder into the female mold 1 of the mould, and then cover the female mold pressing plate 2;

[0039] Step 2: Use a hydraulic press to compact the iron-chromium-aluminum metal powder in the mold with a pressure of 500 MPa, then slide the stripping plate 3 upward through the handle 4 to separate the stripping plate 3 from the liner 8, and then place the stripping plate 3 Place on the platform for 5 minutes, then open the female mold 1, and finally remove the female mold pressing plate 2 to obtain a porous iron-chromium-aluminum metal body.

[0040]The porous iron-chromium-aluminum metal material body obtained in this example has no cracks, no delamination, and is integral and free of defects. The porous iron-chromium-aluminum metal material body is placed in a sintering furnace and heated at a r...

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Abstract

The invention provides a mould for preparing a porous metal material blank. The mould comprises a substrate, a liner plate and a demoulding plate; the liner plate is fixedly arranged on the substrate;the demoulding plate is reversely buckled on the liner plate; a groove is formed in the center position of the top of the liner plate; a needle plate is placed in the groove; a plurality of mould needles penetrating through the top of the demoulding plate are arranged on the needle plate; a female mould used for loading metal powder is arranged at the top of the demoulding plate; a female mould pressure plate is arranged on the female mould; a handle is fixedly arranged at the periphery of the demoulding plate; sliding blocks are arranged on the inner side of the demoulding plate; sliding grooves are formed in the liner plate; and positions of the sliding grooves correspond to those of the sliding blocks. The invention further discloses a method for preparing the porous metal material blank. The blank prepared by the mould does not crack or layer, the rate of finished products can reach 100%, and a bonding agent is not used in the preparation process, so that the prepared porous metalmaterial blank is more uniform in component, and impurities are not produced.

Description

technical field [0001] The invention belongs to the technical field of material processing and manufacturing, and in particular relates to a mold and a method for preparing a porous metal material body. Background technique [0002] The current preparation methods of porous metal materials are extrusion forming and compression molding. In these two methods, different formulations of binders added to the raw metal powder during the preparation process can solve the problem that the final formed porous metal material can not be cracked or cracked. The disadvantage of layering, but with the addition of the binder, the binder needs to be removed during later sintering, which increases the difficulty of the sintering process. Increase the sintering temperature or prolong the sintering time, or in the sintering process It needs to be carried out in multiple stages, but the binder still remains in the final porous metal material, which will lead to unstable performance of the mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/03B22F3/04B22F3/11
CPCB22F3/03B22F3/04B22F3/11
Inventor 敖庆波王建忠马军王晓罡吴琛
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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