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《Iron and Steel》 2004-01
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RESEARCH ON THE SEMI-SOLID SLURRY PREPARATION OF 60Si2Mn SPRING STEEL

MAO Weimin ZHAO Aimin YUN Dong ZHANG Leping ZHONG Xueyou (University of Science and Technology Beijing)  
The nondendritic semi solid slurry preparation of 60Si2Mn spring steel has been studied The experiments have shown that with stirring for 2 minutes under the test condition, the semi solid slurry with 40 %~50 % fraction solid and spherical primary austenite in the size of 100~300 μm can be obtained and is easy to be discharged through a little hole on the bottom of the stirring chamber The more homogeneous temperature field and solute field of the 60Si2Mn spring steel melt have been observed because of the electromagnetic stirring, which restrains the formation of large primary austenite dendrites and creates a base to form spherical crystals of primary austenite The stronger temperature fluctuation in the melt with many rosette primary austenites caused by stirring and the remelting of the secondary arm roots in the same time are the most important reasons for formation of spherical primary austenitic grains
【Fund】: 国家自然科学基金资助(项目编号 5 9995 44 0 )
【CateGory Index】: TG249
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