Rheo-casting of Al based wrought and cast alloys via controlled diffusion solidification

通过控制扩散凝固进行铝基变形和铸造合金的流变铸造

• 批准号: 311953-2009
• 负责人: Shankar, Sumanth
• 金额: $ 1.68万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=526326
• 关键词: Rheo; casting; Al; based; wrought

CDS is a novel rheo-casting process to facilitate the net shaped castings of Al based wrought and cast alloys by Controlled Diffusion Solidification. The objectives of the first phase of this project were achieved and the knowledge base for the mechanisms involved in CDS and the control required on the processing parameters have been successfully developed. CDS as a process has also attracted significant interest from the automotive sector and specific projects to develop novel alloys for automotive parts have been initiated. The proposed second phase of this project will pursue the development of specific alloy chemistries and the process parameters required to process these alloys. Specific aluminum wrought alloys from the 2xxx, 3xxx, 4xxx, 5xxx, 6xxx and 7xxx alloy series will be developed for the the CDS process and cast into net shaped components and their mechanical and performance properties quantified. Two main processes will be used for this study: high pressure/squeeze die casting and tilt pour permanent mould casting. The process parameters identified as critical in the first phase of this project are melt superheats for the two precursor alloys, mass ratio of mixing, rate of pour of second alloy into the first alloy, wait time prior to casting the mixed alloy, mould pre-heat temperature. Each final desired alloy chemistry has a specific windows of operation for each and every process parameter mentioned above. The objectives of the proposed research program include the design and development of individual precursor alloys and optimize the above mentioned process parameters. The alloys being developed are specifically from 2xxx, 3xxx, 4xxx, 5xxx, 6xxx and 7xxx families of Al wrought alloys. The specific tasks are to quantify the effect of pouring method and rate of second alloy on the resultant microstructure and properties, optimize process conditions for high pressure/Squeeze die casting and tilt pour permanent mould casting processes for CDS, develop a guide book to present the specific detailed instructions on the procedure to cast various alloys by CDS, and evaluate mechanical properties such as Tensile, Fatigue, Creep and Wear for all the alloys being cast.

CD是一种新型的Rheo铸造过程，可通过受控的扩散固化来促进基于Al的锻造和铸造合金的净形铸件。 实现了该项目的第一阶段的目标，并成功地开发了CD中涉及的机制的知识库以及处理参数所需的控制。 CD作为一个过程还引起了汽车行业的重大兴趣，并且已经启动了为汽车零件开发新颖合金的特定项目。该项目的拟议第二阶段将追求特定合金化学的开发以及处理这些合金所需的过程参数。将开发来自2xxx，3xxx，4xxx，5xxx，6xxx和7xxx合金系列的特定铝制合金，用于CDS工艺并将其施放到净形组件中，并量化其机械和性能。这项研究将使用两个主要过程：高压/挤压铸造和倾斜倒入永久性模具铸造。在该项目的第一阶段中确定为关键的过程参数是两种前体合金的熔体超热，混合质量比，第二合金倒入第一合金的倒入速率，等待在施放混合合金之前的等待时间热温。每个最终所需的合金化学都有上述每个过程参数的特定操作窗口。拟议的研究计划的目标包括设计和开发各个前体合金并优化上述过程参数。所开发的合金专门从2xxx，3xxx，4xxx，5xxx，6xxx和7xxx家族的Al Wrought Alloys家族。具体的任务是量化倒倒的方法和第二合金速率对所得的微观结构和特性的效果，优化用于高压/挤压铸件的过程条件，并为CDS倾斜了永久性模具铸造过程针对CD铸造各种合金的程序的特定详细说明，并评估所有被施放合金的机械性能，例如拉伸，疲劳，蠕变和磨损。