| 摘要 |
The present invention provides an additive alloy consisting essentially of (7) percent to (45) percent by weight copper, (40) percent to (84.50) percent by weight zinc, and 0.1 percent to (4) percent by weight silicon, the alloy being free of gold or silver. The invention includes a method of manufacturing a tarnish-resistant, corrosion-resistant and substantially less brittle alloy for suitable use in jewellery such as rings, earrings, and bangles. The method includes admixing the additive alloy with a precious metal to obtain an admixed alloy, which is substantially brittleness free and highly tarnish resistant. The process of making the admixed alloy into a shot form is illustrated in Figure 4, wherein the molten metal (14) is poured through a graphite strainer (20) having a multiplicity of holes (22) and into a container (24) having water (26) therein, and the mixture then forms shots or grains (28).
|
