The various magical features of lead-based alloys

[China Aluminum Industry Network] Lead-based alloys of various magical features

1 Lead-based or tin-based bearing alloys. Lead-based bearing alloys are collectively referred to as babbitt alloys. Containing lanthanum 3% to 15%, copper 3% to 10%, some alloy varieties also contain 10% of lead. Tantalum and copper are used to improve the strength and hardness of the alloy. Its small friction coefficient, excellent toughness, thermal conductivity and corrosion resistance, important for the manufacture of sliding bearings.

2 lead-tin solder. Mainly tin-lead alloys, some tin solders also contain a small amount of germanium. 38.1% lead solder alloy, commonly known as tin solder, melting point of about 183 ℃, elements for electrical instrument industry, and automotive radiators, heat interchanger, seals and other food and beverage containers.

3 Lead-based alloy coatings. Using the tin alloy's anti-corrosion properties, it is applied to the appearance of various electrical components, which is both protective and decorative. Commonly used tin lead, tin nickel coating.

4 Lead-based alloys (including lead-tin alloys, lead-free tin alloys) can be used to produce a variety of sophisticated soft products, alloy arts and crafts, such as rings, necklaces, bracelets, earrings, brooches, buttons, tie clips, hats, crafts Decorations, alloy photo frames, religious emblems, miniature sculptures, memorable items, etc.

Lead-based alloys (used as a combination of soft products, alloy process quality characteristics)

1. Lead-based alloys have stable properties, low melting point, good mobility, and small shrinkage.

2. The lead-based alloy has fine grain, excellent toughness, suitable hardness and softness, smooth appearance, no sand hole, no flaws, no cracks, and good polishing and plating results.

3. The lead-based alloy has good centrifugal casting performance and strong toughness. It can cast large-sized, thin-walled fine parts, and the casting has a smooth appearance.

4. Lead-based alloy products can be held in appearance disposal penalties: electroplating, spraying, spray paint.

5. Lead-based alloy crystals have a compact layout, ensuring that the size of the castings is small in terms of material service, fine appearance, and less post disposal penalty.

In simple complex ion acidic electrolytes, lead-tin alloys can be coprecipitated at very low current densities. Pb-Sn alloy coatings have lower porosity than lead coatings and tin coatings of the same thickness. Tin-containing alloys have a 60% content. Lead 40% Pb-Sn alloy has a lower eutectic point of 183°C, and its welding performance far exceeds that of pure tin. Therefore, it has been widely used in the aerospace and electronics industries. Its performance is stable, its melting point is low, and its activity is high. Good, tightness is small. Grain fine, excellent toughness, soft and hard, smooth appearance, no sand holes, no defects, no cracks, polished and plating results.