SBIR Phase I: USV-Grain Refining

SBIR 第一阶段：USV-晶粒细化

• 批准号: 0912132
• 负责人: Clause Xu
• 金额: $ 10万
• 依托单位: Hans Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0912132&HistoricalAwards=false
• 关键词: SBIR; Phase; USV; Grain; Refining

This Small Business Innovation Research Phase I project entitled "USV-Grain Refining" aims at advancing the grain refining technologies for the production of aluminum or magnesium alloy ingots or castings. Grain refining is usually one of the first processing steps for the production of metal and alloy products. The conventional methods use chemical grain refiners that contain foreign particles. These methods have limited capability in reducing grain size, and foreign particles added into molten metals lead to defect formation during materials processing. This project will combine the latest technologies of processing of lightweight materials using ultrasonic vibration (USV) and continuous casting or direct chill casting technology, and to demonstrate the feasibility of an enabling technology for producing metal ingots of ultrafine grains without the use of foreign particles for grain refining. The new technology will provide cost effective opportunities for producing metal and alloy products with grain size much smaller than that obtainable using the best commercial grain refiners, addressing issues related to the defect formation associated with the use of grain refiners containing foreign particles and increasing the production rates of metals and alloys. The successful completion of this Phase I project will lead to a breakthrough technology for grain refining of a vast array of metals and alloys to the grain size level that are not capable to achieve using the conventional technologies. Grain refining is important for maximizing ingot casting rate, improving resistance to hot cracking, minimizing elemental segregation, enhancing mechanical properties, particularly ductility, improving the finishing characteristics of wrought products, increasing the mold filling characteristics, and decreasing the porosity of foundry alloys. The commercial implementation of the project results has the potential of achieving significant cost savings, energy savings, and environmental benefits for the metal manufacturing industry. In addition, students involved in the research will have opportunities to interact with industrial partners.This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).

这个名为“usv晶粒细化”的小企业创新研究第一阶段项目旨在推进铝或镁合金锭或铸件生产的晶粒细化技术。晶粒细化通常是生产金属和合金产品的第一步加工步骤之一。传统的方法使用含有外来颗粒的化学谷物精炼剂。这些方法在减小晶粒尺寸方面的能力有限，并且在材料加工过程中，外来颗粒的加入会导致金属熔体形成缺陷。本项目将结合利用超声波振动（USV）加工轻质材料的最新技术和连铸或直接冷铸技术，论证不使用外来颗粒进行晶粒细化而生产超细晶粒金属锭的使能技术的可行性。这项新技术将为生产金属和合金产品提供具有成本效益的机会，使其晶粒尺寸比使用最好的商业晶粒精炼厂所能获得的要小得多，解决了与使用含有外来颗粒的晶粒精炼厂相关的缺陷形成问题，并提高了金属和合金的生产率。该一期项目的成功完成将带来一项突破性的技术，用于将大量金属和合金的晶粒细化到传统技术无法实现的晶粒尺寸水平。晶粒细化对于提高铸锭率、提高抗热裂性、减少元素偏析、提高机械性能（特别是延展性）、改善锻造产品的精加工特性、增加模具填充特性和降低铸造合金的孔隙率非常重要。项目成果的商业实施有可能为金属制造业实现显著的成本节约、能源节约和环境效益。此外，参与研究的学生将有机会与工业合作伙伴互动。该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。