熔渣线膨胀系数与焊剂成分之间的关系

Relationship between thermal expansion coefficient of slag and components of agglomerative flux

利用数理统计理论发展起来的混料优化设计方法,建立数学模型。研究了A l2O3-CaO-CaF2系高韧性焊剂七个基本组元间的交互作用对熔渣线膨胀系数的影响,揭示了焊剂的成分同线膨胀系数之间的内在关系,讨论了焊剂成分和线膨胀系数对脱渣性的影响,给出了焊剂成分与线膨胀系数之间的定量描述回归方程。结果表明,ZrO2对线膨胀系数有着显著的影响,当ZrO2>10%,可使熔渣的线膨胀系数明显增大。而少量ZrO2与MgO-CaF2三个组元共同作用结果却使线膨胀系数明显降低;当MgO∶CaF2接近1时,MgO与CaF2的共同作用结果,使熔渣的线膨胀系数具有较低值。

Based on multi-factor mixture experimental designs,Al_2O_3-CaO-CaF_2 system agglomerative fluxes with high toughness were investigated,and the thermal expansion coefficients of slag were determined.The complex interaction regularity among seven components in agglomerative flux on the thermal expansion coefficients of slag was studied.The relation between thermal expansion coefficients of slag and detachability was discussed and the quantatatine regression equation of thermal expansion coefficient with flux components was developed.Results showed that the addition of ZrO_2 has a significant effect on the thermal expansion coefficients of slag.When ZrO_2>10%,thermal expansion coefficients increase gradually with the addition of ZrO_2,but the mutual action of a small amount of ZrO_2 with MgO-CaF_2 can cause a decrease in thermal expansion coefficient.Furthermore,the ratio of MgO/CaF_2 is important to control the thermal expansion coefficients of slag,when it is close to 1,the thermal expansion coefficient decreases greatly.