Aluminum bronze tube has the function of improving mechanical properties

The effect of chemical composition of aluminum bronze tube on microstructure and properties of aluminum bronze has always been a focus of attention. First of all, the role of chemical composition of alloy is good or bad is not a clear definition, such as iron in aluminium bronze, general fine grains, reduce the spontaneous temper brittleness, improving the mechanical properties, however, when the iron content is higher, the iron will of precipitation FE3AL2 compound, make the mechanical properties of alloy becomes bad, therefore, The iron content should not exceed 5%.

Of course, the same is true of zinc. Many studies believe that it can improve the plasticity of metal after solid solution with the base metal, and some studies consider it as an impurity element. It can be seen that the role of alloying elements can not be generalized, it is generally believed that adding appropriate alloying elements can improve the mechanical properties of the alloy, such as adding appropriate amount of iron to form aluminum iron bronze, adding manganese to form aluminum manganese bronze, adding nickel to form aluminum nickel bronze.

It is because of the change of chemical composition that the types and applications of aluminum bronze tubes are different. Researchers should study the influence of chemical composition and action mechanism, and further expand the application range of aluminum bronze tubes.

Some strengthening processes are usually used to improve the microstructure of al-bronze tube to achieve the required service and process properties. The main strengthening methods of al-bronze alloy include solution strengthening, fine grain strengthening and aging strengthening. Solution strengthening is the process of heating the alloy to make aluminum, manganese and other alloying elements into the copper matrix to form saturated or supersaturated solid, quenching to room temperature to get supersaturated solid solution. However, the supersaturated solid melt will decompose and precipitate at room temperature or higher temperature, which can significantly increase the strength and hardness of the alloy, which is aging strengthening.