Effects of MgCa alloy on microstructure

composition constituent and mechanical properties

cutting behavior of the lead brass were investigated by optical microscope（OM）

scanning electron microscope（SEM）

EDS

XRD and FactSage calculation as well as elastic calculation.The results show that with the increase of MgCa alloy addition

lead brass is still composed ofαandβtwo-phase structures with uniform distribution

however

theαphase content is reduced andβphase content is increased.In addition

theαphase is tended to be spherical.With MgCa alloy addition

Ca2 Pb and Mg2 Pb compounds with stable and high melting point can be generated with lead

decreasing the harm of lead.The Ca2 Pb and Mg2 Pb are brittle and Cu2 Mg exhibits plastic

leading to hardness increase and conductivity decrease gradually

however

effects on cutting behavior of the alloy scraps can be ignored.