Effects of microalloy elements on microstructure and properties of Zn-Cu-Ti alloy
Zn-1.0Cu-0.1Ti,Zn-1.0Cu-0.1Ti-0.05Cr-0.05Mg,and Zn-1.0Cu-0.1Ti-0.05Cr-0.05Ni(mass fraction,%)alloy were prepared by simultaneously adding trace amounts of Cr,Mg,and Cr,Ni elements to the Zn-Cu-Ti alloy.Zn-Cu-Ti alloy sheets were prepared through melting casting,hot rolling and cold rolling.And the strengthening mechanism,mechanical properties,creep resistance,and corrosion resistance of the alloys were analyzed.The results show that the mechanical properties,creep resistance,and corrosion resistance of the Zn Cu Ti alloy are significantly improved by adding Cr,Mg,and Cr,Ni elements simultaneously.The alloys with the addition of Cr and Mg elements obtain tensile strength of 343 MPa,elongation of 40%,creep rate of 1.38×10-9 s-1,corrosion potential of-1.076 V and corrosion current density of 8.306×10-6 A/cm2,which demonstrates the optimal overall performance.The strengthening mechanism of the alloy is mainly solid solution strengthening and precipitation dispersion strengthening.The fine dispersion second phase is conducive to improving the creep resistance.The addition of alloy elements promotes the formation of a dense passivation layer on the alloy surface and the absence of coarse precipitation phase improves the corrosion resistance of the alloy.And it is proposed that reducing the deformation rate of single pass cold rolling can suppress the deformation induced precipitation of CuZn5 phase.
NETL
NSTL
万方数据
维普
