(北京有色金属研究总院 有色金属材料制备加工国家重点实验室，
北京 100088)
摘 要: 介绍了一种制备半固态浆料的新工艺——阻尼冷管法(DCT)， 利用流体分析软件FLOW3D对AZ91D镁合金在阻尼冷管中的制备过程进行三维数值模拟， 获得了制备半固态浆料过程中金属的流动规律， 并得出了压头高度、 楔形形状及缝隙大小对合金熔体流动及制备出的半固态浆料均匀程度的影响规律,从而为DCT模具的设计及工艺参数的优化提供有效的理论指导。
关键字: 阻尼冷管法； 半固态浆料； AZ91D镁合金
（State Key Laboratory for Fabrication and Processing of Non-ferrous Metals, Beijing General Research Institute for Non-ferrous Metals, Beijing 100088, China）
Abstract: A new damper cooling tube method used to prepare semi-solid slurry of AZ91D magnesium alloy was introduced. 3D numerical simulations for the flow patterns of AZ91D magnesium alloy in DCT process were carried out by FLOW3D. The effects of technical parameters, such as pressure head, wedge shape and gap size, on the metal flow uniformly were obtained. The results will give effective guidelines for DCT's design and optimization of process parameters.
Key words: damper cooling tube method; semi-solid slurry; AZ91D magnesium alloy
