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US 9,427,817 B2Granted
Brazing method
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKosuke Nishikawa, Tetsuya Morifuji, Kyozo Mizuno, Nobuki Negoro
Life of this patent
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Abstract
According to this brazing method, a first base member having a non-plated surface, a metal layer for functioning as a diffusion barrier layer, a brazing foil, and a second base member having a surface are arranged in this order so that the non-plated surface of the first base member and the surface of the second base member are faced with each other. The first base member and the second base member are brazed by using the brazing foil. The cost of providing a diffusion barrier layer between the first base member and the brazing foil is thereby reduced.
Claims10
A brazing method comprising:
- arranging a first base member having a non-plated first surface, a metal layer serving as a diffusion barrier layer, a brazing foil, and a second base member having a second surface in order of the first base member, the metal layer, the brazing foil, and the second base member, wherein the non-plated first surface of the first base member and the second surface of the second base member face each other;
- and
- brazing the first base member and the second base member using the brazing foil,
- wherein the arranging comprises contacting the first base member with the metal layer, contacting the metal layer with the brazing foil, and contacting the brazing foil with the second base member,
- wherein the brazing comprises heating in a state where the first base member contacts with the metal layer, the metal layer contacts with the brazing foil, and the brazing foil contacts with the second base member,
- wherein the metal layer is not bonded to the first base member before the brazing of the first base member and the second base member,
- wherein the brazing foil is made of cobalt-based brazing material, nickel-based brazing material, copper-based brazing material, palladium-based brazing material, silver-based brazing material, or gold-based brazing material,
- and wherein a thickness of the metal layer is 5 μm to 20 μm.
5 more elements
A method of making a combustion chamber of a rocket engine comprising:
- arranging a first base member having a non-plated first surface, a metal layer serving as a diffusion barrier layer, a brazing foil, and a second base member having a second surface in order of the first base member, the metal layer, the brazing foil, and the second base member, wherein the non-plated first surface of the first base member and the second surface of the second base member face each other;
- and
- brazing the first base member and the second base member using the brazing foil,
- wherein a coolant channel serving as a flow passage of coolant fluid is formed in the non-plated first surface,
- wherein the brazing foil is made of cobalt-based brazing material, nickel-based brazing material, copper-based brazing material, palladium-based brazing material, silver-based brazing material, or gold-based brazing material,
- wherein the metal layer is not bonded to the first base member before the brazing of the first base member and the second base member,
- and wherein a thickness of the metal layer is 5 μm to 20 μm.
4 more elements
A brazing method comprising:
- arranging a first base member having a non-plated first surface, a first metal foil serving as a diffusion barrier layer, a brazing foil, a second metal foil serving as a diffusion barrier layer and a second base member having a non-plated second surface in order of the first base member, the first metal foil, the brazing foil, the second metal foil, and the second base member, wherein the non-plated first surface of the first base member and the non-plated second surface of the second base member face each other;
- and
- brazing the first base member and the second base member using the brazing foil,
- wherein the arranging comprises contacting the first base member with the first metal foil, contacting the first metal foil with the brazing foil, contacting the brazing foil with the second metal foil, and contacting the second metal foil with the second base member,
- wherein the brazing comprises heating in a state where the first base member contacts with the first metal foil, the first metal foil contacts with the brazing foil, the brazing foil contacts with the second metal foil, and the second metal foil contacts with the second base member,
- wherein a material of the first metal foil is different from a material of the second metal foil,
- wherein the first metal foil has a different composition from the second metal foil, and
- wherein the brazing foil is made of cobalt-based brazing material, nickel-based brazing material, copper-based brazing material, palladium-based brazing material, silver-based brazing material, or gold-based brazing material,
- wherein the first metal foil and the second metal foil are not bonded to the first base and the second base member, respectively, before the brazing of the first base member and the second base member,
- and wherein a thickness of the first metal foil is 5 μm to 20 μm and a thickness of the second metal foil is 5 μm to 20 μm.
7 more elements
Dependencies are inferred from the claim text.