Prepn process of porous metal materrial

A metal porous and metal powder technology, which is applied in the field of preparing metal porous materials, can solve the problems of high porosity, low strength and toughness, etc.

Inactive Publication Date: 2005-04-27
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The methods described in the above patents are only sintering and bonding of m...

Method used

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  • Prepn process of porous metal materrial
  • Prepn process of porous metal materrial
  • Prepn process of porous metal materrial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Atomize 1Kg of stainless steel powder with SUS304L water with a sieving particle size of 10-175 μm and an average particle size of 50.37 μm, use hydroxymethyl cellulose as a binder, make a 2% aqueous solution, and add 500ml / Kg of metal powder for bonding Add 500ml of aqueous solution and mix well. The wire mesh is a commercially available 60-mesh 304 stainless steel wire mesh with a wire diameter of 0.18mm. The wire mesh is cut into a rectangle of 250mm×500mm, and the sheet weighs 78g. The wire mesh is cleaned with a metal cleaning agent to remove surface dirt, and then 20% 1HNO is used 3 +3HCl aqueous solution, soak for 20min., then rinse with water. First, tension the single-layer wire mesh with a bracket, and then use a rigid scraper to drive the slurry to slide at 45° along the tensioned wire mesh plane, so that the slurry can be evenly filled into the mesh grid and spread evenly on the surface of the wire mesh. Tiling, coating thickness 0.92mm. The coated blank ...

Embodiment 2

[0019] SUS304L water-atomized stainless steel powder with a sieving particle size of 4-90 μm and an average particle size of 36.72 μm is used, and the other is the same as in Example 1. The coating thickness is 0.65 mm, and the thickness before and after rolling is 0.62 mm and 0.52 mm respectively. Finally, this product is obtained. The single-sheet area of ​​the invention is 250mm×500mm, and the stainless steel porous body weighs 135g.

Embodiment 3

[0021] SUS304L water-atomized stainless steel powder with a sieving particle size of 2 to 70 μm and an average particle size of 25.87 μm is used, and the others are the same as in Example 1. The coating thickness is 0.55 mm, and the thicknesses before and after rolling are 0.50 mm and 0.42 mm respectively. Finally, this product is obtained. The single-sheet area of ​​the invention is 250mm×500mm, and the stainless steel porous body weighs 124g.

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Abstract

The present invention is preparation process of porous metal material, and features that metal powder and water soluble adhesive are mixed into slurry; the slurry is painted onto metal net, stoved and sintered in vacuum or reducing atmosphere; and the sintered metal net is rolled and flattened to obtain the said porous metal material. The present invention provides the preparation process of sintered porous metal material with high filtering precision, excellent permeating performance and excellent mechanical and physical performance. The porous metal material is used mainly in filtering and separating in industry, and may be also used in fluid distributing and control, catalyst carrier, energy exchange, electrode material, etc.

Description

technical field [0001] The invention relates to a method for preparing metal porous material. Background technique [0002] Metal porous materials are generally made of spherical or irregular metal or alloy powders by forming and sintering. The main uses are: filtration and separation, fluid distribution and control, catalytic carrier, energy exchange, electrode materials, etc., among which filtration and separation It is the largest industrial application field. [0003] The performance evaluation indexes of sintered metal porous materials used as filter materials include: filtration accuracy, permeability and mechanical properties. Filtration accuracy is determined by the pore size of the porous material and the divergence of the pore diameter. Fine powder can obtain fine pore diameter, and narrow powder particle size can obtain pore diameter with small divergence. The permeability is directly related to the porosity and thickness of the porous material. Materials with l...

Claims

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Application Information

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IPC IPC(8): B22F5/10
Inventor 蔡一湘张立华张殿武
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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