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

这项研究提出了一种新的技术， 通过分散纳米氧化物颗粒来代替高速钢， 碳化物在铁基基体中沉淀。由于 化学稳定性和较小尺寸的氧化物分散体， 建议的材料应表现出远高于600的高强度 与传统的高速钢不同，的过程 在这里将研究涉及的制造，首先包括 氧化物均匀分散的铁粉的生产 其次通过铸造或标准的方法使粉末固结 粉末冶金. 所提出的材料的其他益处可以改进 磨削性和断裂韧性，由于尺寸非常小， 铁基复合材料中氧化物分散体的更大均匀性 矩阵传统合金化的一些高成本也将 避免.因此，该研究方法提供了一个有吸引力的 可替代生产上级高速模具材料。

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.