Adding a small amount of bismuth to steel, iron, aluminum, and bronze can significantly improve the processing performance of the material. The amount of bismuth used as an additive is increasing year by year, becoming one of the main uses.
For example, adding 0.2-0.6% bismuth to aluminum can improve the cutting performance of aluminum, and its mechanism is similar to that of steel. 0.2-0.4% bismuth is added to Al-Mg alloy, the alloy no longer cracks during rolling, and the ability of the alloy to resist corrosion and external forces is enhanced.