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US 7,441,690 B2Granted
Joined structure of different metals and friction welding method thereof
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsKatsuhiko Shiotsuki, Masashi Fujita
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Abstract
A joined structure of different metals is usable even in a severely corrosive environments such locations susceptible to salt damage. In a joined structure of different metals, members of different metals are joined to each other in such a manner that a flange is allowed to extend in a direction from the circumferential side of one of the members along the circumference of the other member.
Claims4
A friction welding method for members of different metals, the method comprising:
- a friction welding step for contacting the members of different metals and relatively rotating the members while providing a friction pressure at a frictional interface of the members,
- the members consisting of a first member having a first melting point and a first proof stress, and a second member having a second melting point and a second proof stress,
- the first melting point being lower than the second melting point;
- and
- an upset step for upsetting the members at an upset pressure larger than the friction pressure;
- wherein the friction pressure is set to be not more than the first proof stress of the first member at the frictional interface temperature, and the upset pressure is set to be not less than the first proof stress of the first member at a normal temperatures,
- wherein a flange extending from the first member to the second member is formed by the friction welding.
4 more elements
Dependencies are inferred from the claim text.