What are the performance characteristics of lead-tin alloys?
Dec 10, 2021
1. Lead-tin alloy has stable performance, low melting point, good fluidity and small shrinkage.
2. The lead-tin alloy has fine grains, good toughness, suitable hardness and softness, smooth surface, no sand holes, no defects, no cracks, and good polishing and electroplating effects.
3. Lead-tin alloy centrifugal casting has good performance and toughness, and can cast precision parts with complex shapes and thin walls, and the surface of the castings is smooth.
4. Lead-tin alloy products can be surface treated: electroplating, spraying, painting.
5. The lead-tin alloy has a dense crystal structure, which ensures that the casting size tolerance is small, the surface is exquisite, and the post-processing defects are few.
In the acidic electrolyte of simple complex ions, the lead-tin alloy can be co-deposited at a very low current density, and the lead-tin alloy coating has a lower porosity than the lead and tin coatings of the same thickness. The lead-tin alloy containing 60% tin and 40% lead has the lowest eutectic point of 183 °C, and its soldering performance is far superior to that of pure tin plating. Therefore, it has been widely used in aerospace, electronic and electrical industries. Stable performance, low melting point, good fluidity and small shrinkage. Fine grain, good toughness, suitable hardness and softness, smooth surface, no sand holes, no defects, no cracks, good polishing and electroplating effect.
