Lead-free and mercury-free white lengma alloy for Tibetan Buddha statues with amplitude modulation decomposition characteristic

Abstract

The invention discloses a lead-free mercury-free white lengma alloy for Tibetan Buddha statues with an amplitude modulation decomposition characteristic. The alloy comprises the following components of, in percentage by weight, 0.5-1.0wt.% of Sr, 4.0-6.0wt.% of Fe, 0.2-0.4wt.% of Ga, 8.0-10.0wt.% of Bi, 2.0-2.5wt.% of Sb, 8.0-10.0wt.% of Co, 4.0%-6.0wt.% of Au, 10.0-12.0wt.% of Ag and the balancecopper. The material provides a lead-free and mercury-free new material scheme for lengma alloy for copper statue casting in Tibetan areas in China, and the obtained product has excellent white impression. The implementation and industrialization of the material can effectively promote the updating of new materials and the industry upgrading requirements of the ornament industry in China.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a copper alloy. Background technique [0002] Large-scale Buddha statues in Tibet are generally cast using the sand casting method. Large-scale Buddha statues cast by Shafan method will also be cast in parts, and then spliced ​​and combined. When casting large-sized bronze Buddha statues, craftsmen can cast the bronze statue parts separately and then combine them with sand fan method, which can reduce the difficulty of casting statues and improve the success rate of casting statues. Bronze statues cast using sand vanning sometimes leave observable features on the surface. Since the sand mold is closed by two halves of the sand mold, and there is a gap at the junction of the two sand mold surfaces, when the casting is completed, the copper liquid flowing into the gap at the joint must form a circle of protrusions on the surface of the casting. This circle of protrusions is usual...

AI Technical Summary

Problems solved by technology

The sand fan is composed of two closed pieces, which need to be turned up and down many times during the process of making the fan. Therefore, it is difficult to make the size of the sand fan very large.

When the size is large, it is more difficult to compact the sand and soil, and it is easy to crack and fall off, and the size of the sand model is large, it is difficult for the craftsman to turn it up and down, and it is difficult to operate

When the copper statue is too large, the casting success rate of the casting will decrease as the copper liquid fails to fill the entire cavity.