急求一段英文（关于铸造方面的）Squeeze casting is a process which involves t

急求一段英文（关于铸造方面的）
Squeeze casting is a process which involves the solidi-
fication of a molten metal in a closed die under an
imposed high pressure.Other terms used to describe
the same or similar processes are liquid metal forging,
extrusion casting and pressure crystallization.The
high applied pressure,which is several orders of mag-
nitude greater than the melt pressure developed in
normal casting processes,keeps entrapped gases in
solution and squeezes molten metal from hot spots to
incipient shrinkage pores.As a result,the porosity in
a squeeze-cast component is almost eliminated.Fur-
thermore,due to the elimination of the air gap at the
liquid-mould interface by the applied high pressure,
the heat transfer across die surfaces is enhanced,which
increases solidification and cooling rates.Thus,su-
perior mechanical properties of the casting resulting
from the pore-free fine microstructure are aEhieved in
squeeze-casting processes.