MSMT制浆工艺因素对浆料组织的影响  

Effects of Processing Parameters on the Microstructure of Semi-solid Slurry Prepared by Melt Spreading and Mixing Method

作　　者：曾怡丹[1] 石力开[1] 张志峰[1] 梁博[1] 徐骏[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心

出　　处：《特种铸造及有色合金》2008年第6期435-438,共4页Special Casting & Nonferrous Alloys

基　　金：国家基础研究发展计划(973计划)资助项目(2006CB605203);国家高技术研究发展计划(863计划)资助项目(2006AA03Z115)

摘　　要：采用熔体分散混合制浆法制备了Al-6.56Si浆料,研究了熔体温度、熔体分散程度、制浆室温度和熔体流量等因素对浆料组织的影响。结果表明,上述4个因素影响熔体的过冷度和温度分布。要获得细小、均匀、非枝晶的浆料组织,熔体温度应不高于650℃、分散器转速应在700～1000r/min、制浆室温度应低于300℃、熔体流量应在6～12kg/min。In order to improve and to optimize the performance of the equipment for the preparation of semi-solid slurry by melt spreading and mixing method,a series of experiments have been conducted to observe the effects of some processing parameters including melt temperature,degree of melt spreading,temperature of slurry-making chamber and melt injection on the microstructure of Al-6.56 Si alloy.The results reveal that the four factors have affected the under-cooling degree and temperature distribution of melt.The spheroidized fine microstructure with dispersive distribution can be prepared by controlling melt temperature less than 650 ℃ and rotating speed of spreading machine at 700~1 000 r/min as well as temperature of making-chamber less than 300 ℃ and melt injection at in range of 6 kg/min^12 kg/min.

关 键 词：半固态流变制浆 熔体分散混合法 浆料微观组织 

分 类 号：TG249[金属学及工艺—铸造]