(中南大学 冶金科学与工程系，长沙 410083)
摘 要: Fe-Cr合金对一氧化钛的润湿性能较差，在熔点温度下各成分的Fe-Cr合金在一氧化钛上的润湿角都在90°左右。当铬含量≤50%时，Fe与TiO间存在界面反应，生成Fe2Ti和Ti3O2。但界面反应的产生，并不能有效改善其 润湿性。随着润湿温度的升高，合金的润湿性略有改善。在Fe-Cr合金中添加少量的表面活性物质Si，可改善Fe-Cr合金在一氧化钛上的润湿性。因为在润湿过程中Si在界面的富集，不仅降低了界面能和液相表面张力，有效改善了合金的润湿性，而且阻止了Fe与TiO间的界面反应，使反应型润湿转变为非反应型润湿。添加合金元素Si1.5%以上，可使润湿角降至25°左右。
关键字: 润湿性；一氧化钛；Fe-Cr合金；合金元素
Fe-Cr on TiO
（Department of Metallurgical Science and Engineering，
Central South University，Changsha 410083, China）
Abstract:The wetting characteristics of Fe-Cr on TiO were studied. The results indicate that the wettability of Fe-Cr on TiO is not well, the wetting angles of Fe-Cr of various components on TiO are all about 90° at melting point temperature. The interface reaction takes place with resultants of Fe2Ti and Ti3O2 when Cr content is lower or equal to 50% in mass fraction. But the interf ace reaction can not improve the wettability effectively. The wettability is improved slightly at higher wetting temperature. The wettability of Fe-Cr on TiO can be improved by adding in a little of Si as surface-active matter. Si can not only reduce the interface energy and the liquid phase surface tension, but also prevent the interface reaction between Fe2Ti and Ti3O2 through the enrichment of Si on the interface during wetting. The reaction wetting is changed into no-reaction wetting, when Si is added to 1.5% or more, while the wetting angles is reduced to about 25°.
Key words: wettability；titanium monoxide；Fe-Cr alloy；alloy additives
