Application characteristics and casting key points of tin bronze 10-1
Tin Bronze 10-1 is a cast tin bronze, also known as QSn10-1. The tin content in its copper alloy is 10%, and the remaining "1" represents the phosphorus content. This material has high strength, good wear resistance, corrosion resistance, pressure resistance, and sufficient thermal stability below 300°C. Therefore, it is often used to manufacture wear-resistant parts that work under high loads (15~20MPa), high sliding speeds (3~8m/s) and relatively high temperatures, such as copper bushings, copper bushings, copper bearing bushes, Copper slide plate, copper worm gear, etc.
In addition, the chemical composition of cast tin bronze complies with the GB/T1176-1987 standard. The phosphorus element mainly exists in the form of (α+Cu₃P) eutectic, and the Cu₃P compound has high hardness and can significantly improve the mechanical properties of the alloy. . At the same time, the phosphorus element can also reduce the surface tension of the copper liquid and improve the fluidity and filling ability of the melt.
During the manufacturing process, high-temperature calcined charcoal or broken graphite blocks are used as covering agents. The crucible and charge must be fully preheated to melt quickly and minimize gas sources. During pouring, the pouring temperature should be controlled according to the cross-section size of the casting. The pouring temperature is 1050~1150℃ for large thick-walled castings and 1100~1200℃ for small thin-walled castings. Finally, in order to eliminate stress, annealing treatment is required. The annealing temperature is 400~500°C and air cooling is used.
