Joined parts of Ni-Ti alloys with different metals and joining method therefor
AssigneesFurukawa Electric Co., Ltd., Masunaga Menlo Park Co., Ltd.
InventorsMasayuki Nakamura, Kaisuke Shiroyama, Satoru Masunaga, Kazuo Murata
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Abstract
Composite parts of Ni-Ti alloys joined to a different metal have a melt forged structure obtained through the reactive fusion of both metals, initiated by the fusion of at least one metal bordering on the joint interface and the application of pressure; a hot forged structure of Ni-Ti alloy obtained through softening the alloy at high temperature and applying pressure on the Ni-Ti alloy side of the joint; and a hot forged structure of the different metal obtained by softening the metal at high temperature and applying pressure on the different metal side of the joint.
Claims4
A joined article of a Ni-Ti alloy having a shape memory characteristic or a superelasticity characteristic and a metal different from said Ni-Ti alloy, said article having interfacial parts of said Ni-Ti alloy joined with said metal different from said Ni-Ti alloy, comprising:
- i) a melt-forged layer obtained through reactive fusion under application of pressure of at least a portion of said different metal bordering on a joined surface with said Ni-Ti alloy;
- ii) a hot-forged layer of said Ni-Ti alloy across a side of layer i), said hot-forged layer having been obtained by softening a portion of said Ni-Ti alloy at high temperature and applying pressure on the side of said Ni-Ti alloy across from said layer (i);
- and
- iii) a hot-forged layer of said different metal across a side of said layer i) opposite that of said layer ii), said hot-forged layer having been obtained by softening a portion of said different metal at high temperature and applying pressure on the side of said different metal across said layer (i).
Dependencies are inferred from the claim text.