microstructure and mechanical properties of cast ZA27 alloy①
(1. Department of Materials Engineering, Gansu University of Technology,
Lanzhou 730050, P.R.China;
2. Department of Technology, The University of Waikato University, Hamilton, New Zealand)
摘 要:
关键字:
microstructure and mechanical properties of cast ZA27 alloy①
（1. Department of Materials Engineering, Gansu University of Technology,
Lanzhou 730050, P.R.China;
2. Department of Technology, The University of Waikato University, Hamilton, New Zealand）
Abstract:The effects of solidification rate, modifications and pouring temperature on the microstructure and mechanical properties of casting zinc-aluminum alloy ZA27 have been investigated. The results show that the number and distribution of pores are the key factors affecting the mechanical properties of ZA27. A slow solidification rate is beneficial to the ductility, while a rapid solidification rate improves the tensile strength of alloy basically. Among the modification agents RE, Sb-Te, Sb-Te-RE and Sb-Te-Ti-B, the addition of Sb-Te to melt results in the best modified microstructure. The optimum pouring temperature for ZA27 is approximately 550℃.
Key words: zinc-aluminum alloy; porosity; mechanical properties; solidification; microstructure
