Preparation of foamed metal sandwich board using clad rolling method

Abstract

A process for preparing sandwich plate of foam metal by wrapping-rolling method includes such steps as proportioning metal powder and foaming agent and controlling their granularity, mixing them, wrapping the mixture under stirring to uniformity, cold rolling, hot rolling for compactness, and foaming. Its advantages are simple apparatus and high binding strength between foamed core and metal plate and specific rigidity. It can be used to damp sound and vibration and insulate heat.

Description

1. Technical field

[0001] The invention relates to a foamed metal sandwich plate (a plate with a metal plate on the surface and a metal foamed core) and a preparation method thereof, belonging to the field of porous metal foam materials. 2. Background technology

[0002] Foam metal sandwich panels have the characteristics of light weight, high specific rigidity, sound attenuation, shock absorption, heat preservation, and heat insulation. They have huge market potential in the fields of construction, decoration, aviation, ships, sound attenuation and shock absorbers, and sporting goods. At present, the preparation process of the known metal foam sandwich panel is to obtain the powder plate by the following two methods (1) powder rolling, and then foam the powder plate and the metal plate; (2) obtain it by other methods Foam metal is processed into plates and then connected with metal plates. These two methods all have: (1) the preparation process cycle is long; (2) the combi...

Examples

Embodiment 1

[0031] After the AlSi6 aluminum alloy powder is annealed, after passing through a 200-mesh sub-sieve, mix it with titanium hydride of the same particle size (consumption is 2% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1: 1, 100 rpm / min), after grinding the surface of pure aluminum plate with a thickness of 0.8 mm, it is wrapped with a mixture of metal powder and titanium hydride (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 450 ° C (30% reduction) to 3.5 mm, foaming at 620 ° C for 10 minutes, can obtain aluminum with a thickness of 15-17 mm, a surface layer thickness of 0.6 mm, a pore diameter of 0.8-2 mm, and a porosity of 60%-70% - Aluminum sandwich panel with porous foam.

Embodiment 2

[0033] After the 6061 aluminum alloy powder is annealed and passed through a 300-mesh sieve, it is mixed evenly with titanium hydride of the same particle size (the amount is 2% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1:1, speed 120 rpm / min), the surface of the pure copper plate with a thickness of 0.6 mm is polished, and then wrapped with a mixture of metal powder and titanium hydride (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 500 ° C ( 30% reduction) to 3.5 mm, foaming at 680 degrees for 12 minutes to obtain copper with a thickness of 15-17 mm, a surface layer thickness of 0.5 mm, a pore size of 1-3 mm, and a porosity of 60%-80% - Aluminum sandwich panel with porous foam.

Embodiment 3

[0035] After the H68 copper alloy powder is annealed, after passing through a 200-mesh sub-sieve, mix it with calcium carbonate of the same particle size (the amount is 3% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1: 1, 100 rpm / min), the surface of the Q235 steel plate with a thickness of 0.6 mm is ground, and then wrapped with a mixture of metal powder and calcium carbonate (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 700 ° C ( 30% reduction) to 3.5mm, foaming at 1000°C for 8 minutes to obtain steel with a thickness of 15-17mm, a surface layer thickness of 0.5mm, a pore diameter of 0.3-0.6mm, and a porosity of 60%-80%- Porous foam copper sandwich panel.

1. Technical field

[0001] The invention relates to a foamed metal sandwich plate (a plate with a metal plate on the surface and a metal foamed core) and a preparation method thereof, belonging to the field of porous metal foam materials. 2. Background technology

[0002] Foam metal sandwich panels have the characteristics of light weight, high specific rigidity, sound attenuation, shock absorption, heat preservation, and heat insulation. They have huge market potential in the fields of construction, decoration, aviation, ships, sound attenuation and shock absorbers, and sporting goods. At present, the preparation process of the known metal foam sandwich panel is to obtain the powder plate by the following two methods (1) powder rolling, and then foam the powder plate and the metal plate; (2) obtain it by other methods Foam metal is processed into plates and then connected with metal plates. These two methods all have: (1) the preparation process cycle is long; (2) the combi...

Examples

Embodiment 1

[0031] After the AlSi6 aluminum alloy powder is annealed, after passing through a 200-mesh sub-sieve, mix it with titanium hydride of the same particle size (consumption is 2% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1: 1, 100 rpm / min), after grinding the surface of pure aluminum plate with a thickness of 0.8 mm, it is wrapped with a mixture of metal powder and titanium hydride (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 450 ° C (30% reduction) to 3.5 mm, foaming at 620 ° C for 10 minutes, can obtain aluminum with a thickness of 15-17 mm, a surface layer thickness of 0.6 mm, a pore diameter of 0.8-2 mm, and a porosity of 60%-70% - Aluminum sandwich panel with porous foam.

Embodiment 2

[0033] After the 6061 aluminum alloy powder is annealed and passed through a 300-mesh sieve, it is mixed evenly with titanium hydride of the same particle size (the amount is 2% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1:1, speed 120 rpm / min), the surface of the pure copper plate with a thickness of 0.6 mm is polished, and then wrapped with a mixture of metal powder and titanium hydride (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 500 ° C ( 30% reduction) to 3.5 mm, foaming at 680 degrees for 12 minutes to obtain copper with a thickness of 15-17 mm, a surface layer thickness of 0.5 mm, a pore size of 1-3 mm, and a porosity of 60%-80% - Aluminum sandwich panel with porous foam.

Embodiment 3

[0035] After the H68 copper alloy powder is annealed, after passing through a 200-mesh sub-sieve, mix it with calcium carbonate of the same particle size (the amount is 3% of the total mass of the powder mixture) in a ball mill (ball-to-material ratio 1: 1, 100 rpm / min), the surface of the Q235 steel plate with a thickness of 0.6 mm is ground, and then wrapped with a mixture of metal powder and calcium carbonate (the height of the sleeve is 15 mm), cold-rolled to a thickness of 5 mm, and then hot-rolled at a temperature of 700 ° C ( 30% reduction) to 3.5mm, foaming at 1000°C for 8 minutes to obtain steel with a thickness of 15-17mm, a surface layer thickness of 0.5mm, a pore diameter of 0.3-0.6mm, and a porosity of 60%-80%- Porous foam copper sandwich panel.

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