Manufacturing method for hierarchical pore metal fiber sintered plate

Abstract

The invention discloses a manufacturing method for a hierarchical pore metal fiber sintered plate. The manufacturing method comprises the following steps of preparing fibers with uniform lengths from a first metal material, and performing prepressing on the fibers by a die to form at least two fiber plates with different preset porosities; placing a middle layer prepared from a second metal material between the fiber plates with different porosities to form a laminated structure, and placing the laminated structure into the die for pressing; putting the die into a sintering furnace for sintering, cooling the die to room temperature in the furnace after sintering is finished, and detaching the die to obtain the hierarchical pore metal fiber sintered plate. According to the manufacturing method, the technology is simple, and the production efficiency is high; the manufacturing method has the advantages of high connection speed, small deformation, low connection temperature, low residual stress, high connection head strength and the like.

Description

technical field

[0001] The invention belongs to the field of composite metals, in particular to a method for manufacturing a multi-level porous metal fiber sintered plate. Background technique

[0002] Porous metal materials are composed of metal materials and their internal pore structures, which have excellent physical properties and good mechanical properties. Porous metal materials have been widely used in buffer shock absorbers, filter purifiers, heat exchangers, exhaust mufflers, catalyst carriers, battery electrodes, and rocket nose cones in the automotive industry, building energy conservation, energy environmental protection, chemical industry, and aerospace fields. And empennage cooling sweating material, underwater submarine muffler, etc. At present, porous metal fiber materials mainly include two types: foam metal materials and metal fiber porous materials. Foam metal is generally made by foaming manufacturing process, which has the advantages of high porosity,...

Examples

Embodiment 1

[0025] In this embodiment, copper is used as the first metal to make fibers, and aluminum is used as the second metal to make the middle layer aluminum foil. The manufacture of copper fiber can be processed on an ordinary lathe by turning copper rods with special multi-tooth tools. The surface roughness of the metal fiber processed by this method is appropriate, and the equivalent diameter is 50-100 μm. In particular, the copper fiber of 50 μm is used in this embodiment. Next, the copper fiber is cut into appropriate small sections with a length of about 10-20 mm, especially, 10 mm is used in this embodiment. Copper fibers are pressed into copper fiber sheets with a predetermined porosity.

[0026] The present invention designs and manufactures a special mold for metal fiber sintered plates, and its structural schematic diagram is as follows figure 1 shown. The mold is composed of a bottom plate 1, a pressing plate 2, a plurality of gaskets 3 of different thicknesses, bolts...

Embodiment 2

[0031] In this embodiment, aluminum is used as the first metal, tin is used as the second metal, and the structure of the mold is the same as that of Embodiment 1. Aluminum fibers with a length of 10-20 mm and a diameter of 75 μm are made of aluminum. According to the relationship between mass and porosity, a certain mass of aluminum fiber is weighed and pre-pressed by a mold to form a fiberboard with a predetermined porosity, and the thickness range is 5-100mm. The relationship between porosity and mass is E=1-m / (ρV), where E is porosity, m is the mass of aluminum fiber, ρ is the density of aluminum, and V is the volume of aluminum fiberboard. Make two aluminum fiber boards with a porosity of 85% and 98% respectively, cut the tin foil with a thickness of less than 0.1mm into the middle layer of the corresponding size of the aluminum fiber board, place it between the two aluminum fiber boards to form a laminated structure, and place it in the mold suppress. The mold is put i...

Embodiment 3

[0033]In this embodiment, stainless steel is used as the first metal, manganese is used as the second metal, and the structure of the mold is the same as that of Embodiment 1. Stainless steel fibers with a length of 10-20 mm and a diameter of 100 μm are made of stainless steel. According to the relationship between mass and porosity, a certain mass of stainless steel fibers is weighed and pre-pressed by a mold to form a fiberboard with a predetermined porosity, and the thickness range is 5-100mm. The relationship between porosity and mass is E=1-m / (ρV), where E is porosity, m is the mass of stainless steel fiber, ρ is the density of stainless steel aluminum, and V is the volume of stainless steel fiber plate. Two stainless steel fiber plates with a porosity of 60% and 70% were made, and the manganese foil with a thickness of less than 0.1 mm was cut into an intermediate layer of the corresponding size as the stainless steel fiber plate and placed between the two stainless stee...

technical field

[0001] The invention belongs to the field of composite metals, in particular to a method for manufacturing a multi-level porous metal fiber sintered plate. Background technique

[0002] Porous metal materials are composed of metal materials and their internal pore structures, which have excellent physical properties and good mechanical properties. Porous metal materials have been widely used in buffer shock absorbers, filter purifiers, heat exchangers, exhaust mufflers, catalyst carriers, battery electrodes, and rocket nose cones in the automotive industry, building energy conservation, energy environmental protection, chemical industry, and aerospace fields. And empennage cooling sweating material, underwater submarine muffler, etc. At present, porous metal fiber materials mainly include two types: foam metal materials and metal fiber porous materials. Foam metal is generally made by foaming manufacturing process, which has the advantages of high porosity,...

Examples

Embodiment 1

[0025] In this embodiment, copper is used as the first metal to make fibers, and aluminum is used as the second metal to make the middle layer aluminum foil. The manufacture of copper fiber can be processed on an ordinary lathe by turning copper rods with special multi-tooth tools. The surface roughness of the metal fiber processed by this method is appropriate, and the equivalent diameter is 50-100 μm. In particular, the copper fiber of 50 μm is used in this embodiment. Next, the copper fiber is cut into appropriate small sections with a length of about 10-20 mm, especially, 10 mm is used in this embodiment. Copper fibers are pressed into copper fiber sheets with a predetermined porosity.

[0026] The present invention designs and manufactures a special mold for metal fiber sintered plates, and its structural schematic diagram is as follows figure 1 shown. The mold is composed of a bottom plate 1, a pressing plate 2, a plurality of gaskets 3 of different thicknesses, bolts...

Embodiment 2

[0031] In this embodiment, aluminum is used as the first metal, tin is used as the second metal, and the structure of the mold is the same as that of Embodiment 1. Aluminum fibers with a length of 10-20 mm and a diameter of 75 μm are made of aluminum. According to the relationship between mass and porosity, a certain mass of aluminum fiber is weighed and pre-pressed by a mold to form a fiberboard with a predetermined porosity, and the thickness range is 5-100mm. The relationship between porosity and mass is E=1-m / (ρV), where E is porosity, m is the mass of aluminum fiber, ρ is the density of aluminum, and V is the volume of aluminum fiberboard. Make two aluminum fiber boards with a porosity of 85% and 98% respectively, cut the tin foil with a thickness of less than 0.1mm into the middle layer of the corresponding size of the aluminum fiber board, place it between the two aluminum fiber boards to form a laminated structure, and place it in the mold suppress. The mold is put i...

Embodiment 3

[0033]In this embodiment, stainless steel is used as the first metal, manganese is used as the second metal, and the structure of the mold is the same as that of Embodiment 1. Stainless steel fibers with a length of 10-20 mm and a diameter of 100 μm are made of stainless steel. According to the relationship between mass and porosity, a certain mass of stainless steel fibers is weighed and pre-pressed by a mold to form a fiberboard with a predetermined porosity, and the thickness range is 5-100mm. The relationship between porosity and mass is E=1-m / (ρV), where E is porosity, m is the mass of stainless steel fiber, ρ is the density of stainless steel aluminum, and V is the volume of stainless steel fiber plate. Two stainless steel fiber plates with a porosity of 60% and 70% were made, and the manganese foil with a thickness of less than 0.1 mm was cut into an intermediate layer of the corresponding size as the stainless steel fiber plate and placed between the two stainless stee...

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