Novel High-Speed Steel Composite for Improved High Temperature and Mechanical Properties

新型高速钢复合材料可改善高温和机械性能

• 批准号: 9260411
• 负责人: Jared Sommer
• 金额: $ 5万
• 依托单位: Technical Research Associates Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9260411&HistoricalAwards=false
• 关键词: Novel; Speed; Steel; Composite; Improved

This research suggests a new technique for fabricating high speed steel by dispersing nanosized oxide particles instead of carbide precipitates within the iron-based matrix. Due to the chemical stability and smaller size of the oxide dispersoids, the proposed material should exhibit high strength well above 600 degrees C, unlike conventional high speed steels. The processes involved in the manufacture will be studied here, including firstly the production of iron powder with the uniformly dispersed oxides and secondly the consolidation of the powder by casting or standard powder metallurgy. Other benefits of the proposed material may be improved grindability and fracture toughness, due to the very small size and greater homogeneity of the oxide dispersoids within the iron-based matrix. Some of the high costs of conventional alloying would also be avoided. The research method therefore offers an attractive alternative to producing superior high speed tooling material.

这项研究提出了一种新的制造高速钢的技术，即在铁基基体中分散纳米氧化物颗粒而不是碳化物析出物。由于氧化物分散体的化学稳定性和较小的尺寸，与传统的高速钢不同，所提议的材料应该表现出远高于600摄氏度的高强度。这里将研究生产过程中所涉及的过程，包括首先用均匀分散的氧化物生产铁粉，然后用铸造或标准粉末冶金的方法进行粉末的固结。由于铁基基质中氧化物分散体的尺寸非常小，而且更均匀，因此所建议的材料的其他优点可能是改善了可磨性和断裂韧性。一些传统合金化的高成本也将被避免。因此，该研究方法为生产优质高速模具材料提供了一种有吸引力的替代方案。