Q.F. Zhu
,
Z.H. Zhao
,
J.Z. Cui
,
Y.B. Zuo
,
F. Qu
金属学报(英文版)
The influences of the low frequency
electromagnetic field on the horizontal direct chill casting process
were investigated experimentally. Ingots of 2024 aluminum alloy with
a cross size of 40~mm$\times$200~mm were produced by the
conventional horizontal chill casting process and low frequency
electromagnetic horizontal chill casting process，respectively. The
as-cast structures and the mechanical property of the ingots were
examined. The results showed that the low frequency electromagnetic
field could substantially refine the microstructures and
pronouncedly reduce the macrosegregation in the horizontal direct
chill casting process. Moreover, the surface quality of the ingot
was prominently improved by the low frequency electromagnetic field.
The fracture strength and elongation percentage of the ingot was
increased with the low frequency electromagnetic field.
关键词:
Horizontal direct chill casting
,
null
Qingfeng ZHU
金属学报(英文版)
7075 aluminum alloy ingot with the diameter of 100 mm has been produced by horizontal direct chill casting in different casting speed. The effect of the casting speed on the ingot surface and subsurface layer was studied by surface observation and subsurface structure analysis. It was found that increasing the casting speed results in the adding of segregation knots in the ingot surface. The thickness of the dendrite microstructure layer in the subsurface reduces with increasing the casting speed. And the elements of Zn, Cu and Mg enrich in the coarse dendrite microstructure layer of the ingot.
关键词:
Horizontal direct chill casting
