Method for joining parts of Ni-Ti alloys with different metals
AssigneesFurukawa Electric Co., Ltd., Masunaga Menlo Park Co., Ltd.
InventorsMasayuki Nakamura, Kaisuke Shiroyama, Satoru Masunaga, Kazuo Murata
Life of this patent
Estimating the term…
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 method for forming a joined part by joining a Ni-Ti alloy with a different metal, comprising the steps of
- contacting the surfaces of said Ni-Ti alloy and said different metal to be joined;
- forming a melt-forged structure interface along said surfaces to be joined by supplying heat sufficient to cause reactive fusion of said Ni-Ti alloy and said different metal along said interface;
- applying simultaneously sufficient heat and pressure to the area of said Ni-Ti alloy bordering said interface and to said different metal bordering said interface such that a hot-forged structure of Ni-Ti is formed on the side of the interface whereon said Ni-Ti alloy is located and a hot-forged structure of said different metal is formed on the side of the interface whereon said different metal is located.
A method for forming a joined part by joining a Ni-Ti alloy with a different metal, comprising the steps of
- contacting the surfaces of said Ni-Ti alloy and said different metal to be joined;
- forming a melt-forged structure interface along said surfaces to be joined, by supplying heat sufficient to cause reactive fusion of said Ni-Ti alloy and said different metal along said interface;
- applying simultaneously sufficient heat and pressure to the area of said Ni-Ti alloy bordering said interface and to said different metal bordering said interface such that a hot-forged structure of Ni-Ti is formed on the side of the interface whereon said Ni-Ti alloy is located and a hot-forged structure of said different metal is formed on the side of the interface whereon said different metal is located;
- wherein during the process of forming said melt-forged structure by reactive fusing, sufficient pressure, not less than 2 Kg/mm.sup.2, is applied across said interface such that a thrust-out portion having a melt-forged structure is formed around the outer circumference of the interface.
A method for forming a joined part by joining a Ni-Ti alloy with a different metal, comprising the steps of
- contacting the surfaces of said Ni-Ti alloy and said different metal to be joined;
- forming a melt-forged structure interface along said surfaces to be joined, by applying heat sufficient to cause reactive fusion of said Ni-Ti alloy and said different metal along said interface;
- applying simultaneously sufficient heat and pressure to the area of said Ni-Ti alloy bordering said interface and to said different metal bordering said interface such that a hot-forged structure of Ni-Ti is formed on the side of the interface whereon said Ni-Ti alloy is located and a hot-forged structure of said different metal is formed on the side of the interface whereon said different metal is located;
- wherein during the process of forming said melt-forged structure by reactive fusing, sufficient pressure, not less than 2 Kg/mm.sup.2, is applied across said interface such that a thrust-out portion having a melt-forged structure is formed around the outer circumference of the interface;
- and wherein said thrust out portion is contacted with a heat-conducting and heat-radiating structure such that said thrust out portion is rapidly solidified.
Dependencies are inferred from the claim text.