碱性耐火材料热稳定性与应力设计的关系

RELATIONSHIP BETWEEN THERMALSHOCK RESISTANCE OF BASIC REFRACTORY AND STRESS DESIGN

通过普通镁铬质耐火材料中颗粒和基质间的热膨胀失配，致密镁铬质耐火材料高密度区和低密度区以及添加物不同加入量区域的收缩率差异，致密镁质耐火材料的晶界相改性等应力设计手段所产生的残余应力，引起热震裂纹偏转、绕道、桥联、分岔和钉扎，从而有效地提高碱性耐火材料的热稳定性。

The thermal shock resiStane of basic refractory can be improved by deflction, bowing, branching, bridging and pining of thermal shock cracks caused by the residual stress which may be brough about by such a few methods of stress design as: mismatch of thermal expansion coefficients between the particles and matrix of the commagnsite - Chrome refrcatory, differences of shrinkage in the high density area and low density area and area of different addtiveamouns of the compact magnesite chrome refractory, phase transformation in the grain boundary of the comact magnesite refractory.