Dissimilar metal joined material and method of manufacturing same
AssigneeHitachi Metals, Ltd.
InventorJunko NISHIMURA
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Abstract
An object of the present invention is to provide a dissimilar metal joined material that has corrosion resistance that can prolong life resulting from corrosion and has a small difference from original characteristics. There is provided a dissimilar metal joined material including: a clad material including a high thermal expansion layer composed of an alloy containing Mn, and a low thermal expansion layer composed of an alloy containing Ni, the low thermal expansion layer being joined directly to the high thermal expansion layer or via an intermediate layer; and a corrosion resistant plating layer provided on at least a surface of the high thermal expansion layer, the corrosion resistant plating layer having a thickness of 10 nm to 120 nm.
Claims6
A dissimilar metal bonded material comprising:
- a clad material comprising:
- a high thermal expansion layer composed of an alloy containing Mn, and
- a low thermal expansion layer composed of an alloy containing Ni, the low thermal expansion layer being joined directly to the high thermal expansion layer or joined via an intermediate layer;
- and
- a corrosion resistant plating layer provided on at least a surface of the high thermal expansion layer, the corrosion resistant plating layer having a thickness of 10 nm to 120 nm.
A method of manufacturing a dissimilar metal joined material, the method comprising the successive steps of:
- degreasing surfaces of a clad material comprising:
- a high thermal expansion layer composed of an alloy containing Mn and a low thermal expansion layer composed of an alloy containing Ni, the low thermal expansion layer being joined directly to the high thermal expansion layer or joined via an intermediate layer;
- washing at least the surface of the high thermal expansion layer;
- plating at least the surface of the high thermal expansion layer with a plating solution to form a corrosion resistant plating layer having a thickness of 10 nm to 120 nm;
- removing the plating solution from the surface of the high thermal expansion layer;
- and
- drying the dissimilar metal joined material.
Dependencies are inferred from the claim text.