Welded structure and work vehicle
AssigneeKomatsu Ltd.
InventorYukihide YOSHIHARA
Life of this patent
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Abstract
A welded structure includes a first member which is a steel plate or a cast steel, a second member which is a steel plate or a cast steel disposed adjacent to the first member with a space therebetween, a first welded portion filling the space and joining the first member to the second member, and a backing material composed of a steel and disposed in contact with the first welded portion so as to close a first opening of the space, the backing material including a transformed region having a martensitic structure in the region in contact with the first welded portion. The steel constituting the backing material has a volume per unit mass greater at room temperature than at the Ms point.
Claims8
A welded structure comprising:
- a first member which is a steel plate or a cast steel;
- a second member which is a steel plate or a cast steel disposed adjacent to the first member with a space therebetween;
- a first welded portion filling the space and joining the first member to the second member;
- and
- a backing material composed of a steel and disposed in contact with the first welded portion so as to close a first opening of the space, the backing material including a transformed region having a martensitic structure in the region in contact with the first welded portion;
- the steel constituting the backing material having a volume per unit mass greater at room temperature than at the Ms point.
Dependencies are inferred from the claim text.