The nondendritic semi-solid slurry preparation of high chromium cast iron Cr20Mo2 has been studied in this paper. The experiments show that the proeutectic austenitic particles are more spherical under a larger stirring power condition, even if the stirring time is shorter, while the proeutectic austenitic particles are not very much spherical under a smaller stirring power condition and some proeutectic austenitic dendrites also exist, even if the stirring time is very long. The experiments also show that when stirred for 5{6 minutes under the test condition, the semi-solid slurry with 40vol.%{ 50vol.% solid fraction and spherical proeutectic austenite in the size of 50{80¹m can be obtained.
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