Effects of Mn Addition and Heat Treatment on Microstructure and Properties of Al-10Si-5Cu Alloy
Effects of Mn addition on microstructure and mechanical properties of Al-10Si-5Cu alloy and wear resis-tance of Mn alloyed specimens under different heat treatment conditions were investigated by metallographic analysis,tensile test,microhardness test and wear test.With the increase of Mn addition,the tensile strength and microhardness of alloy is increased firstly and then decreased,while the elongation is decreased.The alloy with 0.40%Mn addition exhibits the desirable tensile strength and microhardness,which are 285 MPa and 128 HV,respectively.Heat treat-ment can further improve the wear resistance of Mn-alloyed alloy.Among all the specimens,as-aged specimens pos-sesses optimal wear resistance.
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