In this article, let Baowu show you the third type of copper - bronze.

Bronze is the earliest alloy in the history of metal smelting. The addition of tin or lead to copper has special importance and historical significance. Compared with copper, bronze has high strength, low melting point, good workability, wear resistance and stable chemical properties. .

Bronze has the characteristics of low melting point, high hardness, strong plasticity, wear resistance, corrosion resistance, bright color, etc. It is suitable for casting various appliances, mechanical parts, bearings, gears, etc.

Bronze is mainly composed of tin Sn, lead Pb, aluminum Al, iron Fe, nickel Ni, manganese Mn, silicon Si, phosphorus P elements, and the special requirements of the bronze alloy also add beryllium Be, magnesium Mg, silver Ag, chromium Cr, cadmium Alloying elements such as Cd, zirconium Zr, and tellurium Te improve performance.

The main types of bronze are tin bronze, aluminum bronze, lead bronze, etc., as well as phosphor bronze, beryllium bronze, nickel aluminum bronze, manganese bronze, silicon bronze and other types.

In addition to the main alloy elements, tin bronze also contains a certain amount of P, Zn, Pb, Ni, etc. Tin bronze has strong corrosion resistance and wear resistance, and its mechanical properties and process properties are quite good.

The main alloying element of aluminum bronze is Al, which can be divided into simple aluminum bronze and complex aluminum bronze. Aluminum bronze is characterized by high mechanical properties, strong corrosion resistance and wear resistance. The aluminum content in aluminum bronze generally does not exceed 13%.

Lead bronze is based on Pb, Zn and Sn as the basic alloy components, and the lead content is generally more than 8%. The composition of Pb in bronze can enhance the fatigue strength, thermal conductivity and wear resistance of the body, as well as the excellent quality that cracks will not occur under the working conditions of impact load. The load-bearing performance of lead bronze is lower than that of aluminum bronze, but the wear reduction and fatigue resistance are much higher, and it is generally used in high-speed running parts.

In addition to its use as tools and weapons, bronze is also widely used to make coins; many copper coins are actually minted in bronze, with a typical composition of 4% tin and 1% zinc.

The above is the relevant content of bronze. If you want to know more, please pay attention to Baowu at any time.