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一、绪言 装饰品与一般工业铸件有着显著的不同,装饰品首先要求结构灵巧,而且现今对装饰品的要求也越来越高,装饰品必须在抛光后用放大镜一一进行检查,确认无缺陷后才能通过。 近年来,贵金属合金的成分起了明显的变化,首先在金合金中加入银、铜、锌的成分来改变合金的色彩;其次是流行着白金合金和金合金的组合商品。 同时还出现了低等级的贵金属合金、即由含白金60％以下,含金40％以下的合金制品。这些合金的熔化技术又比较复杂,问题也就随之而生。
I. INTRODUCTION Decorations have remarkable differences from ordinary industrial castings. Decorations first require dexterity. Nowadays, the requirements for decorations are also getting higher and higher. Decorations must be inspected with magnifying glass after polishing to confirm that there is no defect After passing. In recent years, the compositions of precious metal alloy have obviously changed. First, the composition of silver, copper and zinc is added to the gold alloy to change the color of the alloy. The second is the combination of platinum alloy and gold alloy. At the same time also appeared a low grade of precious metal alloy, which contains less than 60% of platinum, gold 40% of the following alloy products. The melting technology of these alloys is more complicated, the problem arises.