Bismuth is a small metal that has only attracted attention in recent years. Its element is bismuth ingot, but its element is very small, most of which are in the form of bismuth oxide, and some bismuth alloys appear.
Tin-bismuth alloy is one of them.
Tin-bismuth alloy is an environmentally friendly alloy. At room temperature, it is solid and silver-white, with a melting point of 138 degrees and a solid-liquid volume shrinkage rate of 0.051%, with strong permeability.
For drawing, bending and forming of thin sheets. The use of low melting point alloy molds does not require mold steel, and the film formation is simple and fast; the mold cost is low and the update is fast; the mold does not need to be adjusted, and does not need to be processed; the mold can be remelted after use, and the alloy can be used repeatedly; Greatly reduce the mold stacking space.
The low melting point tin-bismuth alloy mold is a kind of stamping mold that uses a non-ferrous metal alloy with a lower melting point as the mold material, and is based on the sample, and is molded in the melting box. In the late 20th century, the low melting point tin-bismuth alloy mold was obtained in China. It is widely used, especially in the deep drawing mold of automobile panel, showing its superiority.
Features of low melting point tin-bismuth alloy: The biggest feature of stamping die is that the convex and concave molds can be formed simultaneously through the casting mold, and the convex and concave molds have uniform gaps between the molds after casting. Ready to use, the alloy material of the casting mold can be repeatedly cast, or other molds can be modified. It is expected that with the development of economy, tin-bismuth alloy will usher in a broader application space.
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