【摘要】 利用回转振动式高温熔体粘度仪测量了Fe-xC(x=2．0％～4．3％)合金熔体的动力粘度(μ)。结果表明,共晶Fe-C合金熔体的流动性(1／μ)与温度和熔体的自由体积呈线性关系;在1 350℃和1 450℃,Fe-xC舍金的流动性随C量增加而增强,这与熔体的过热度增大和自由体积增加有关;熔点附近相同过热度(△T=20℃)的熔体的流动性随C量的增加而降低,这主要与熔体中的C-C键的增强有关。更多还原

【Abstract】 The viscosity(μ) of Fe-xC(x = 2. 0-4. 30%) molten alloy was measured by oscillating crucible viscometer. The results show that the fluidity (1/μ) of the eutectic Fe-C alloy has linear relationship with temperature and free volume. At 1 350 and 1 450℃, the fluidity increases with increasing carbon content, which is related to the increase of superheat and the free volume of Fe-xC melt. AtΔT = 20℃, the fluidity of Fe-xC molten alloy decreases with increasing carbon content, which are mainly caused by the strengthening C-C bond in the melt.更多还原