Dissimilar metal joint including flame-retardant magnesium alloy layer

Patent metadata

Field	Value
Publication number	US-2020384578-A1
Application number	US-201816482410-A
Country	US
Kind code	A1
Filing date	Apr 4, 2018
Priority date	Apr 14, 2017
Publication date	Dec 10, 2020
Grant date	—

Abstract

Provided is a multimaterial joint material that contributes to multimaterialization and a reduction in weight of a transport apparatus, the multimaterial joint material being configured from: a flame-retardant magnesium alloy; and a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel. This multimaterial joint material is such that two or more layers of different types of metal materials are joined, wherein the multimaterial joint material is characterized in that: of the two or more layers of metal materials, at least one layer comprises a flame-retardant magnesium alloy, and another layer comprises a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel; and the two or more layers of metal materials are joined together across the entire surface of joining surfaces that overlap each other.

First claim

1 . A dissimilar metal joint in which two or more layers of different types of metal materials are joined, wherein at least one layer of the two or more layers of metal materials is composed of a flame-retardant magnesium alloy, another layer is composed of a metal or alloy selected from the group consisting of aluminum alloy, titanium alloy, stainless steel and steel, and the two or more layers of metal materials are mutually joined over the entire joining surfaces that respectively overlap.

2 . The dissimilar metal joint according to claim 1 , wherein the joining surfaces are such that the two or more layers of metal materials are mutually joined directly by solid phase bonding without having an adhesive layer interposed there between, and the thickness of a transition layer formed due to plastic flow and/or heat at the joining interface is 300 μm or less.

3 . The dissimilar metal joint according to claim 1 , wherein the shear strength at the joining interface is 70% or more of the shear strength of the metal material having the lowest shear strength among the metal materials composing the dissimilar metal joint.

4 . The dissimilar metal joint according to claim 1 , wherein the layer thickness of the dissimilar metal joint is 3 mm or more.

5 . The dissimilar metal joint according to claim 1 , wherein the dissimilar metal joint can be cut, machined or bent to a shape suitable for the shape of the transport equipment structure.

6 . A transport equipment structure provided with the dissimilar metal joint according to claim 1 .

7 . A method for producing the dissimilar metal joint according to claim 1 , comprising: a step for carrying out joining by colliding flame-retardant magnesium with a metal or alloy selected from the group consisting of aluminum alloy, titanium alloy, stainless steel and steel at high speed by utilizing explosive gas, laser or electricity/electromagnetism.

Assignees

• Asahi Chemical Ind

Inventors

• Keno Hiroki
• Otsuka Masahiko

Classifications

• B23K20/08 Primary

  Explosive welding · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title

• B32B15/01

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title

• B23K2103/10

  Aluminium or alloys thereof · CPC title

• B23K20/233

  without ferrous layer · CPC title