摘要
在深入分析Miedema合金生成热模型的基础之上 ,运用化学反应和溶液热力学理论对钛熔体中溶质元素的活度系数进行了理论计算 ,进而评述了钛合金熔体的化学活性变化程度 .通过对Ti6Al4V合金和Ti15V3Cr3Sn3Al合金与所选择的耐火氧化物类铸型材料的实验研究结果分析 ,可以认为添加合金元素以后钛熔体的化学活泼性并没有发生实质性的改变 ,由于熔体仍然具有相当高的化学活性 ,导致合金与铸型之间的界面反应是严重的 ,计算与实验结果吻合 .同时所进行的理论分析和实验研究对于铸钛用高稳定性铸型材料的选择 。
On basis of the Miedema model on formation heat of alloys and the thermodynamics of chemical reactions and solutions, the activity of molten titanium alloys was calculated. As a comparison, the interface reactivity of some refractory oxides with Ti6Al4V and Ti15V3Cr3Sn3Al alloys has been also studied experimentally. The results show that chemical reactivity of molten titanium has not been changed due to the addition of alloying elements. The selected molding materials have contaminated the candidate alloys seriously, and the experiment is fitting well with the calculated results. Furthermore, considering the high chemical reactivity of molten titanium alloy, the above evaluations can provide some instructions for choosing mold materials for titanium castings.
出处
《材料科学与工艺》
EI
CAS
CSCD
2001年第2期130-134,共5页
Materials Science and Technology
