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钒钛铸铁是用攀铜的钒钛生铁生产的各种牌号的铸铁,正逐步形成独立的体系。本文阐述了钒钛铸铁比国内同类型普通铸铁有较好的综合性能;概述了钒钛铸铁生产中的原料配比,成份调整和金相组织情况;论述了钒钛元素主要以块状夹杂物的形态存在于铸铁之中,其数量、大小、形状、随钒钛元素的含量不同而变化,并受铸铁中碳、氮含量和冷却速度的很大影响;说明了钒钛元素在金属各相中的固溶和弥散析出是强化铸铁的基本原因,聚集长大的钒钛夹杂物不仅没有削弱反而略为提高了铸铁的抗拉强度,证明了用钒钛铸铁生产重型厚壁铸件的可能性。
Vanadium and titanium cast iron is vanadium and titanium pig iron cast iron production of various grades of cast iron, is gradually forming an independent system. In this paper, the vanadium-titanium cast iron has better comprehensive properties than the same type of ordinary cast iron in China. The raw material ratio, compositional adjustment and microstructure in the production of vanadium-titanium cast iron are summarized. The vanadium- In the shape of cast iron, its quantity, size and shape vary with the content of vanadium and titanium, and is greatly influenced by the carbon and nitrogen content and cooling rate in cast iron. It is shown that the content of vanadium- In the solid solution and dispersion precipitation is the basic reason for strengthening the cast iron, vanadium and titanium inclusions grew up not only did not weaken but slightly increased the tensile strength of cast iron, vanadium titanium cast iron proved the possibility of producing heavy thick-walled castings.