(1. 清華大學 機械工程系, 北京 100084；
2. 北京科技大學 鑄造研究所， 北京 100083；
3. 河北科技大學 材料系， 石家莊 050054)
摘 要: 提出了半固態(tài)連鑄的主要工藝參數(shù)設計原則：澆注溫度為澆入制漿室后的熔體溫度恰好等于液相線的溫度；制漿室預熱溫度保證熔體澆入后，其界面溫度不小于停止流動的臨界溫度,不大于熔體的初始溫度；開拉時間在保證開拉時引錠不滑脫的前提下越短越好；拉坯速度既保證金屬熔體通過制漿室的時間不小于非技晶球狀組織的形成時間，又要保證熔體在通過結(jié)晶器的時間內(nèi)能夠形成不小于安全厚度的凝固層。
關(guān)鍵字: 半固態(tài)金屬；連鑄； 工藝參數(shù)
semisolid continuous casting
HU Han-qi2 ,MA Jing3, LI Ya-min3
（1. Department of Mechanical Engineering,
Tsinghua University,Beijing 100084, P.R.China；
2. Foundry Research Institute, University of Science and Technology Beijing,
Beijing 100083, P.R.China；
3. Department of Materials Science and Engineering,
Hebei University of Science and Technology, Shijiazhuang 050054, P.R.China）
Abstract:The obtained design principles of the major process parameters of the semisolid continuous process are: 1) the pouring temperature must make the temperature of the poured melt equal to the liquidus temperature; 2) the preheating temperature of the stirring chamber must make the melt temperature in the inner surface of the stirring chamber in the range from the critic temperature for stopping flow to the liqidus temperature of the alloy；3) the beginning time for the withdrawal should be determined as short as possible in the condition of the withdrawal slipping free, and 4) the withdrawal rate is designed to provide a time long enough not only for the nondendretic structure forming, but also for the safety thickness forming.
Key words: semisolid metals; continuous casting; process parameter
