A kind of preparation method of micro flow porous metal material

A porous metal, micro-flow technology, applied in the field of porous material preparation, can solve problems such as difficulty in meeting and low dimensional accuracy control, and achieve the effects of good processing performance, safe operation, and good corrosion resistance.

Active Publication Date: 2022-05-24
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of post-processing of the structure of porous metal materials, the dimensional accuracy control of porous metal materials is generally low at present.
In GB / T6886-2019 "Sintered Metal Filter Elements" and other national standards for porous metal materials, the tolerance of dimensional accuracy can reach ±3mm, which is difficult to meet the needs of modern industrial assembly

Method used

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  • A kind of preparation method of micro flow porous metal material

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment includes the following steps:

[0034] Step 1: Load the -500 mesh titanium powder into the mold, and press the cold isostatic pressing method at 100 MPa to obtain a porous tube blank. The heating rate is increased to 1050°C for 2 hours to obtain a porous titanium tube body; the pore diameter of the porous titanium tube body is not more than 10 μm;

[0035] Step 2: According to the size of the target product micro-flow porous titanium material, the surface of the porous metal tube body obtained in the step 1 is machined, the rotational speed used for machining is 280 rpm, and the feed rate is 0.5 mm to obtain the length of It is a porous titanium base tube with an outer diameter of 45mm±1mm and an outer diameter of 47.5mm;

[0036] Step 3: Process the dense titanium material to a size matching the porous titanium base tube obtained in the second step to obtain a dense titanium end cap, and select the dense titanium end cap to punch holes to a diameter of...

Embodiment 2

[0039] This embodiment includes the following steps:

[0040] Step 1. Put -500 mesh titanium powder into the mold, and press the cold isostatic pressing method at 120 MPa to obtain a porous tube blank. The heating rate is increased to 1100°C for 2 hours to obtain a porous titanium tube body; the pore diameter of the porous titanium tube body is not more than 10 μm;

[0041] Step 2: According to the size of the target product micro-flow porous titanium material, the surface of the porous metal tube body obtained in the step 1 is machined, the rotational speed used for machining is 280 rpm, and the feed rate is 0.5 mm to obtain the length of Porous titanium base tube with an outer diameter of 50mm±1mm and an outer diameter of 45mm;

[0042] Step 3: Process the dense titanium material to a size matching the porous titanium base tube obtained in the second step to obtain a dense titanium end cap, and select the dense titanium end cap to punch holes to a diameter of 10 mm to obtai...

Embodiment 3

[0045] This embodiment includes the following steps:

[0046] Step 1: Load the -500 mesh titanium powder into the mold, and press the cold isostatic pressing method at 150 MPa to obtain a porous tube blank. The heating rate is increased to 900°C for 1 hour to obtain a porous titanium tube body; the pore diameter of the porous titanium tube body is not more than 10 μm;

[0047] Step 2: According to the size of the target product micro-flow porous metal material, the surface of the porous metal tube body obtained in the step 1 is machined, and the rotational speed used for machining is 280 rpm, and the feed rate is 0.5 mm to obtain a length of It is a porous titanium base tube with an outer diameter of 45mm±1mm and an outer diameter of 44.5mm;

[0048] Step 3: Process the dense titanium material to a size matching the porous titanium base tube obtained in the second step to obtain a dense titanium end cap, and select the dense titanium end cap to punch holes to a diameter of 10...

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Abstract

The invention discloses a method for preparing a micro-flow porous metal material. The method comprises: 1. Pressing metal powder through cold isostatic pressing to obtain a porous tube blank, and sintering to obtain a porous metal tube body; 2. The surface of the tube body is machined to obtain a porous metal matrix tube; 3. The dense metal end cap and the dense metal end cap with holes are processed; 4. After the end cap is welded, the surface of the porous metal matrix tube is machined to form a small aperture structure , to obtain a micro-flow porous metal material with a gradient pore structure. In the present invention, part of the particles on the surface of the porous metal pipe body are melted and then solidified through machining, combined with the control of the process parameters of the machining treatment, a small pore structure is formed on the surface of the porous metal pipe body, and a micro-flow porous structure with a gradient pore structure is obtained. The metal material realizes the precise control of micro-flow, and overcomes the difficulties of traditional metal porous materials with large pore size and high porosity, which make it difficult to control micro-flow.

Description

technical field [0001] The invention belongs to the technical field of porous material preparation, and in particular relates to a preparation method of a micro-flow porous metal material. Background technique [0002] Porous metal materials have a three-dimensional interconnected pore structure, high adsorption capacity, material diversity, and good permeability. It is an efficient material for filtration, separation and flow control. Compared with traditional metal porous materials, micro-flow metal porous materials are represented by titanium and titanium alloys. Due to the advantages of light weight, high temperature resistance, high strength, corrosion resistance, and stable structure, they exhibit excellent performance in harsh environments such as high temperature and high pressure. Broad application prospects. [0003] The process route of pressing and sintering metal powder as raw material is one of the main technical methods for preparing metal porous materials at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B22F5/12B22F7/08B22F3/04B22F3/11B22F3/24
CPCB23P15/00B22F5/106B22F7/002B22F3/04B22F3/11B22F3/24B22F2003/247B22F2003/248
Inventor 荆鹏王建忠杨保军王晓罡
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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