【摘要】 借助于平板压铸件,研究了T1、T5、T6热处理对高真空压铸AlSi10MnMgFe合金的微观组织和力学性能的影响。结果表明,高真空压铸件组织致密,性能优于普通压铸件。170℃×8h时效处理后压铸件的抗拉强度达到351.3MPa,高于铸态,伸长率为3.5%,比铸态有所下降。T5、T6热处理可以改善压铸件的组织。T5热处理后试样的伸长率达到8.3%,明显高于铸态;而T6热处理后,压铸件的抗拉强度、屈服强度、伸长率和硬度(HB)分别达到358.4 MPa、286.6 MPa、6.1%、110.4,均高于铸态。更多还原

【Abstract】 Effects of heat treatment,such as artificial aging(T1),T5,T6,on microstructure and mechanical properties of high vacuum die casting AlSi10MnMgFe alloy plates were investigated.The results indicate that high vacuum die casting specimens exhibit sound structure and a better mechanical properties compared with conventional die castings.After artificial aging at 170℃for 8hours,the tensile strength and the elongation of the high vacuum die casting specimens reach 351.3MPa and 3.5%, respectively,which is the higher and lower those of the as-cast specimens,respectively.In addition, mechanical properties of the specimens produced are improved after T5and T6heat treatment.After T5 heat treatment,the elongation of the high vacuum die casting specimens is increased to 8.3%,obviously superior to that of as-cast ones.The tensile strength,yield strength,elongation and hardness of the T6 specimens reach 358.4MPa、286.6MPa、6.1%and 110.4,respectively.更多还原