Phosphorus is a good deoxidizer for copper alloy, which can increase the fluidity of the alloy, improve the process and mechanical properties of tin bronze, but increase the degree of segregation.
The limit solubility of phosphorus in tin bronze is 0.15%, when too much, a+δ+Cu3P terpolymer eutectic will be formed, melting point is 628℃, hot brittleness is easy to occur in hot rolling, can only be cold processing.