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Melting behavior of magnesium alloy chips in thixomolding process CUI Xiao-peng(崔晓鹏)1, LIU Hai-feng(刘海峰)2, LIU Yong-bing(刘勇兵)3 1. Institute of Materials Science and Engineering, Changchun... by Japan Steel Works. The microstructure from the AZ91D magnesium alloy chips to the thixomolded products was investigated. Melting behavior of the chips in thixomolding process was analyzed. The evolution......
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for AM50A magnesium alloy thixoextruded from starting material produced by the RAP route were better than those of the same alloy produced by die-casting and thixomolding. Key words: AM50A magnesium alloy... and thixomolded alloy. In the die-casting process, continuous β-Mg17Al12 network was found in the alloy, which was deleterious to mechanical properties. In the thixomolding process, although solid......
; 镁合金被誉为21世纪的绿色工程材料,而半固态加工被称为21世纪最有前途的材料成形加工方法[1],用于镁合金工业生产的半固态触变注射成形技术(Thixomolding?)发展更是令人瞩目,其产品具有质量轻,比强度高,制造成本低,近终形成形,降噪减震和可回收等优异性能...射件质量较大的料筒温度,螺杆剪切速率,注射速度和模具温度4个参数进行探讨,研究主要工艺参数对触变注射的影响,模拟过程基本流程如图1.模拟参数设置如表2所列. 图1 模拟过程流程图 Fig.1 Flow chart of thixomolding simulation 表2 主要工艺参数设置 Table 2 Setting of main......
to the difference of preparing process, the technologies mainly fall into two categories. The first category is classified for the intense convection forced into the slurry, represented by thixomolding... semisolid state. Taking thixomolding as an example, the recrystallization mechanism of non-dendritic solid phase was supposed, but the microstructure characteristics of fragmented AZ91D chips......
过程更加稳定可靠 [18] . 4 半固态成形 4.1 半固态金属的流变成形 金属半固态成形工艺方法主要分为流变成形和触变成形. 由于直接获得的半固态金属浆料的保存和输送很不方便, 因而制约了半固态成形技术的发展. 目前实际应用的流变成形技术只有一种, 称为射铸 (Injection Molding or Thixomolding) 技术, 如图1所示...通用汽车公司生产汽车零件 (A356材料经T6热处理) , 达到日产5 000件生产规模, 并计划将产量提高4倍. 1995年, Thixomat公司的子公司Lindberg公司利用Thixomolding工艺, 为某些汽车公司生产了50余万件的半固态镁合金铸件, 使用了约100 t的原料. 另外, EPCO Division, HPM Corporation, Italpresse......
, as a leading magnesium alloy used for structural applications, contains aluminum and zinc as principal alloying elements. This alloy is sometimes produced by semi-solid injection molding (thixomolding), whereas......
the Injection Molding of Metal Alloys[P]. US Patent 5040589,1991. [4]Decker R F, Carnahan R D, Vining R, et al. Progress in thixomolding [A]. Kirkwood D H, Kapranos P. Proc of the 4th Int Conf on Semi... of Alloys and Composites[C]. Turin, Italy: 2000. 215-220. [8]Walukas D M, LeBeau S E, Prewitt N D, et al. Thixomolding-technology opportunities and practical uses [A]. ibid, 109-114. [9]Walukas D M......
Thixomolding? process is a complex process, of which numerical simulation is necessary for development. Governing equations and numerical models are first given, and then the experiment and its filling... words: analysis; semisolid; thixomolded; magnesium 1 Introduction Recently, Thixomolding? becomes one of the hottest topics as a kind of lately-developed magnesium alloy process, which combines......
of the unmelted phase [J]. Materials Science and Engineering A, 2005, 392: 51-61. [15] CZERWINSKI F. Magnesium alloy particulates for thixomolding applications manufactured by rapid solidification [J]. Materials Science and Engineering A, 2004, 367: 261-271. [16] CUI Xiao-peng. The research on the microstructure and process of thixomolding AZ91D magnesium alloy [D]. Changchun: University of Jilin......