CAJ | 학술논문

基于固?气共晶定向凝固技术和单相合金的定向凝固原理，提出一种测定氢在金属熔体中扩散系数的方法。以Cu?H2系为例，研究氩气分压和熔体过热度对氢在金属熔体中熔点处扩散系数的影响。结果显示，不同工艺参数条件下所获得的扩散系数差别很小，且采用该方法获得的氢在金属 Cu 熔体中温度相关的扩散系数方程与文献中采用实验方法获得的结果吻合得较好，并验证了该方法的可行性。除Cu?H2系外，还计算了氢在金属Mg、Si以及Cu?34.6%Mn合金熔点温度熔体中的扩散系数值以及温度相关的扩散系数方程。
기우고?기공정정향응고기술화단상합금적정향응고원리，제출일충측정경재금속용체중확산계수적방법。이Cu?H2계위례，연구아기분압화용체과열도대경재금속용체중용점처확산계수적영향。결과현시，불동공예삼수조건하소획득적확산계수차별흔소，차채용해방법획득적경재금속 Cu 용체중온도상관적확산계수방정여문헌중채용실험방법획득적결과문합득교호，병험증료해방법적가행성。제Cu?H2계외，환계산료경재금속Mg、Si이급Cu?34.6%Mn합금용점온도용체중적확산계수치이급온도상관적확산계수방정。
Based on the solid?gas eutectic unidirectional solidification technique and the principle of unidirectional solidification of single-phase alloy, a new method for evaluating the diffusion coefficient of hydrogen in liquid metals was proposed. Taking Cu?H2 system for example, the influences of argon partial pressure and superheat degree of melt on the diffusion coefficient of hydrogen in liquid metal were studied and the predicted values were similar to each other. The obtained temperature-dependent equation for diffusion coefficient of hydrogen in liquid copper is comparable with experimental data in literature, which validates the effectiveness of this method. The temperature-dependent equations for diffusion coefficient of hydrogen in liquid Mg, Si and Cu?34.6%Mn alloy were also evaluated by this method, along with the values at the melting point of each metal and alloy.