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Properties of lead brass bars

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Update time : 2023-02-06 17:55:27

Lead brass rod is a kind of lead brass with high lead content, which can not be processed under hot pressing. It has good antifriction performance, easy fiber welding and welding, good stability to general corrosion, but has the tendency of corrosion rupture. Used for structural components.

Lead brass rods are used in clock structure parts, automobile tractor parts, precision corrosion resistant parts such as machine movements, video recorders, cameras, clocks and other electronic products.

property

Lead brass is a kind of complex brass with lead as the main additive element. It is composed of four non-ferrous metals, Cu.Pb.Al.Zn, with a certain proportion. Lead is rarely dissolved in copper and zinc alloy. It exists independently in the alloy and distributes in the crystal boundary and crystal. It has lubricating effect, makes the debris broken, and can improve the cutting and wear resistance of brass. The machinability of lead brass is proportional to lead content, but when lead content exceeds 3%, the machinability of copper is no longer significantly improved, and the hardness of copper is reduced. Strength and elongation. Therefore, the main properties of lead brass can be summarized as wear resistance, corrosion resistance and good toughness.

meaning

Lead is almost insoluble in copper - zinc binary alloy and the solid solution is distributed in free state. Lead point has excellent lubrication and grinding properties, and the surface accuracy of machined parts is very high. For the purpose of evaluating the cuttability of metallic materials, lead brass is usually rated as *, and the cuttability of the evaluated metal is equivalent to a few percent of HPB63-3. With the increase of lead content, the cutting property of brass increases.

Lead brass parts have lead dissolving problems in use, causing environmental pollution. Therefore, the research of environmentally friendly alloys is generally developing, mainly choosing two factors: patellar and antimony, but due to resource constraints, it is difficult to achieve the goal of replacing lead brass.

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