Development of advanced sintering processes using novel high temperature thermal analysis techniques

使用新型高温热分析技术开发先进的烧结工艺

• 批准号: RGPIN-2015-04042
• 负责人: Corbin, Stephen
• 金额: $ 2.55万
• 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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=685479
• 关键词: Development; advanced; sintering; processes; using

Sintering is a process which allows the net shape production of a part from metallic powder. A major advantage of sintering is that it reduces the need for material removal steps, such as machining, thus reducing costs, energy usage and material waste. When sintering is applied to lightweight metals (e.g. Titanium) for transportation applications, the added benefit of weight reduction and lower fuel consumption can be realized.*** In this proposal, the production of two Titanium alloys (Ti-6wt%Al-4wt%V and Ti-10wt%V-2wt%Fe-3wt%Al) using blended elemental (BE) and master alloy (MA) sintering will be investigated. In MA or BE sintering, commercially pure (CP) Ti powder is mixed with either an MA powder (e.g. a prealloyed 60 wt% Al/40wt% V powder) or elemental powders (e.g. 6 wt% pure Al and 4 wt% V) to obtain the desired alloy composition. This powder mixture is compacted into a near net shape, which typically has pores between the compacted powders in the range of 20 to 25% of the total part volume. During sintering, the Al and V alloying elements diffuse through the CP-Ti matrix, creating a uniform alloy composition, while helping to reduce the porosity present in the original compacted part. Currently, the lowest cost route of sintering, using a large CP-Ti powder size, is unable to obtain the final properties needed for most industrial applications. This is primarily due to the inability of the sintering process to reduce the original porosity to the required level of less than 2%. A combination of three thermal analysis tools will be used to generate a fundamental understanding of MA and BE sintering of Ti alloys using large CP-Ti powders. The insight gained from this work will be used to develop more cost effective, and higher performance Ti parts through sintering. This will increase the use of this light metal in the Canadian aerospace and automotive industries, facilitating weight reduction, lower fuel economy and ultimately a reduction in greenhouse gases. The application of the research results will contribute to an increase in the global competitiveness of Canadian companies and an improvement of the socioeconomic well being of Canadians.**

烧结是一个过程，可以从金属粉中产生零件的净形状。烧结的主要优点是，它减少了对加工等物质拆卸步骤的需求，从而减少了成本，能源使用和物质浪费。当将烧结应用于运输申请中的轻质金属（例如钛）时，可以实现减肥和降低燃油消耗的额外好处。调查。在MA或烧结中，将商业纯净（CP）Ti粉与MA粉末（例如，预售的60 wt％al/40wt％V粉末）或元素粉（例如6 wt％纯Al和4 wt％V）混合在一起，以获得所需的合金成分。将这种粉末混合物压实成近乎净形状，通常在压实的粉末之间有毛孔，范围为总零件量的20％至25％。在烧结期间，Al和V合金元件通过CP-TI矩阵扩散，产生均匀的合金组成，同时有助于减少原始压实部分中存在的孔隙率。当前，使用大型CP-TI粉末大小的烧结成本最低的途径无法获得大多数工业应用所需的最终属性。这主要是由于烧结过程将原始孔隙率降低到所需水平小于2％的原因。将使用三种热分析工具的组合来产生对MA的基本理解，并使用大型CP-TI粉末对Ti合金烧结。从这项工作中获得的洞察力将用于开发更具成本效益和通过烧结的更高性能TI零件。这将增加加拿大航空航天和汽车行业中这种轻质金属的使用，促进体重减轻，降低燃油经济性，并最终减少温室气体。研究结果的应用将有助于提高加拿大公司的全球竞争力，并改善加拿大人的社会经济福祉。**