Abstract
AbstractHigh speed steels (HSS) are iron-based alloys containing Fe-C-X where X represents a group of alloying elements which includes Cr, W, Mo, V, and Co, respectively. A major issue associated with these steels is the formation of a network of eutectic phases at the end of solidification. This network, beside the primary MC, which contains austenite and lamellar M2C or skeleton M6C carbides reduces the toughness and the hardness. In this study a new niobium alloyed HSS is designed that is different from known high speed steels. The objective is to produce cast high speed tool steel without the need for hot working. The microstructure was modified by niobium additions and an optimized heat treatment. Niobium helps to control precipitation of monocarbides from the liquid phase, thus decreasing the formation of brittle interdendritic eutectic carbide films and increasing toughness. Microstructure and mechanical properties of as-cast and heat treated samples of this modified steel were characterized by optical microscopy and scanning electron microscopy with energy dispersive spectroscopy (EDS). Heat treatments were developed to optimize the microstructural and mechanical properties of this niobium alloyed cast high speed steel.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference19 articles.
1. Niobium-Alloyed high speed steel by powder metallurgy
2. H. Chandrasekaran: High Speed Steel For Intermittent Machining and Potential For Development, Proc. of the 5th Internatıonal Conference on Tooling 1999, Volume 1, Montanuniversity of Leoben, Leoben, Austria, pp. 67–82
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献