Development of innovative aluminum P/M materials and processing technologies

创新铝粉末冶金材料及加工技术的开发

• 批准号: 250034-2006
• 负责人: Bishop, DonaldPaul
• 金额: $ 1.77万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364696
• 关键词: Development; innovative; aluminum; materials; processing

The demand for vehicles with improved fuel efficiency and reduced emissions has risen sharply in recent years.  In an effort to meet this goal, the expanded use of light metal alloys to reduce overall vehicle weight is an area of great automotive interest.  Aluminum alloys have been particularly successful in this regard yet conventionally processed (cast, wrought) forms have not attained an appreciable presence in one particularly lucrative market - that of structural engine components. Penetration into this sector is a foreboding task given that tight dimensional control and excellent mechanical properties are staples while cost effective production is mandatory.  With regards to the former, the required tolerances can not be attained through traditional metal forming operations alone. This ensures the need for expensive machining operations that increase costs to a point where aluminum fails to become a viable option. However, the precision forming capabilities inherent in aluminum powder metallurgy (P/M) can be leveraged to avoid this problem and yield a high performance yet cost-effective, product.  The merit of this approach has become obvious to engineers in the U.S.A., Japan and Europe as many large research and development initiatives are now active.  Unfortunately, the occurrence of similar programs in Canada is disproportionately low.  Technological advancement has lagged and as a result, so too has Canadian exploitation.  The applicant proposes to conduct research in a number of key areas that are pivotal to the enhanced usage of aluminum P/M.  One will pertain to the development of new alloy systems specifically centered on P/M equivalents to high performance wrought alloys such as AA2618.  In another branch the development of aluminum-based materials with exceptional wear resistance and high temperature stability will be pursued.  Here, composite materials of sorts reinforced with in-situ formed nitrides will be synthesized.  Finally, the development of sinter-brazing technology for aluminum P/M alloys will be studied.  In this technique green compacts of aluminum-based powders are sintered and brazed simultaneously yielding cost-effective automotive components of exceptional geometric complexity.

近年来，对提高燃油效率和减少排放的车辆的需求急剧上升。为了实现这一目标，扩大使用轻金属合金来减轻车辆的总重量是汽车界的一个重大兴趣领域。铝合金在这方面特别成功，但仍采用常规方法加工（铸造、锻造）形式在一个特别有利可图的市场--结构发动机部件市场--中没有获得可观的存在。由于严格的尺寸控制和优异的机械性能是斯台普斯因素，而成本效益的生产是强制性的，因此渗透到这个领域是一个不祥的任务。关于前者，仅通过传统的金属成型操作无法达到所需的公差。这确保了对昂贵的机加工操作的需要，这增加了成本，使得铝不能成为可行的选择。然而，可以利用铝粉末冶金（P/M）固有的精密成形能力来避免这个问题，并产生高性能但具有成本效益的产品。这种方法的优点对美国的工程师来说已经变得显而易见，日本和欧洲的许多大型研究和开发计划现在都很活跃。不幸的是，加拿大类似计划的发生率不成比例地低。技术进步滞后，因此，加拿大的开采也是如此。申请人建议在一些关键领域进行研究，这些领域对提高铝P/一个是开发新的合金系统，特别是以高性能锻造合金（如AA 2618）的粉末冶金等效物为中心。另一个分支是开发具有特殊耐磨性和高温稳定性的铝基材料。将合成各种原位形成的氮化物增强的复合材料。最后，将研究铝粉末冶金合金烧结-钎焊技术的发展。在该技术中，铝基粉末的绿色压坯同时烧结和钎焊，生产出具有特殊几何复杂性的经济高效的汽车零部件。