Decorative part with substrate and multi-layer hardening laminate

摘要

A decorative part comprising a hardening layer having a pink Au alloy coating film on a surface of the part. The hardening layer is obtainable by laminating a base layer, a primary layer and a finishing layer from the side of a substrate. The base layer comprises a metal layer comprising one metal or two or more metals selected from Hf, Ti and Zr and, superimposed thereon, a compound layer comprising the same metal constituting the metal layer and further comprising nitrogen, carbon or oxygen. The primary layer has a laminating structure such that an Au alloy layer, and a compound layer comprising one metal or two or more metals selected from Hf, Ti and Zr and further comprising nitrogen, carbon or oxygen are laminated one after the other. The finishing layer comprises an Au alloy layer.

主权项

1. A decorative part comprising a substrate and a hardening layer superimposed on the substrate, wherein:
the hardening layer is obtained by laminating a base layer, a primary layer and a finishing layer in order on the substrate, the base layer comprises a metal layer comprising Ti and, superimposed thereon, a compound layer comprising Ti, nitrogen, and carbon, the primary layer has a laminating structure such that an Au alloy layer, and a compound layer comprising Ti, nitrogen, and carbon are laminated one after the other starting from the Au alloy layer, and the finishing layer comprises an Au alloy layer, wherein the Au alloy layer in the primary layer or the Au alloy layer in the finishing layer comprises an Au alloy comprising Au and Cu as main components and further comprising at least one metal selected from the group consisting of Pd, Pt, Ag and Ni wherein the Au content is 79.5 to 94.5% by mass, the Cu content is 5 to 20% by mass and the at least one metal content is 0.5 to 5% by mass provided that the total of Au, Cu and the at least one metal is 100% by mass based upon the total mass of the Au alloy layer, and has an ordered lattice.