Three advantages of tin-bismuth alloy

1. The alloy has good damping performance.

Compared with aluminum alloy, steel and iron, it has a lower elastic modulus. Under the same stress conditions, tin-bismuth alloy can consume more deformation work, and has the functions of noise reduction and vibration reduction, and can withstand large shock and vibration. load, suitable for the preparation of seismic parts. Tin-bismuth alloy has a small specific gravity and is currently the lightest structural material. The specific strength of tin-bismuth alloy is significantly higher than that of aluminum alloy and steel, and only slightly lower than that of fiber-reinforced materials with the highest specific strength; the specific stiffness is comparable to that of aluminum alloy and steel, but far from It has good advantages over fiber reinforced materials.

2. The alloy has good thermal conductivity, thermal stability, anti-electromagnetic interference and shielding performance.

The castability of tin-bismuth alloy is good, the reactivity of magnesium and iron is very low, iron crucible can be used for smelting, the enthalpy of fusible substance per unit capacity is low, its die-casting speed can be higher than that of aluminum, and the casting and machining accuracy of castings are high. Tin-bismuth alloy die casting is the minimum wall thickness. The tin-bismuth alloy can be processed at high speed, has high production efficiency, and solidifies quickly in the mold.

3. The dimensional stability of the alloy is good.

The shrinkage rate is stable, and the dimensional accuracy of castings and finished products is high. Except for magnesium-aluminum-zinc alloys, most tin-bismuth alloys have basically zero dimensional changes due to phase transformation during heat treatment and long-term use. Excellent cutting performance, its cutting speed is much higher than other metals. When cutting tin-bismuth alloy, the tool consumption is low, and the cutting power is small. The power consumption ratio of tin-bismuth alloy, aluminum alloy, cast iron and low alloy steel cutting the same parts is a fixed value. The tin-bismuth alloy does not need grinding and polishing after cutting, and a machined surface with very low roughness can be obtained without cutting fluid. In addition, when the tin-bismuth alloy is impacted or rubbed, the surface does not produce sparks, which is conducive to production safety.