搪玻璃层温差急变失效数值模拟及试验研究

Numerical simulation and experiment research about the thermal shock failure of glass-lined coating

温度急变损坏是搪玻璃压力容器搪玻璃层主要失效形式之一。本文基于对搪玻璃层温差急变失效过程数值模拟,研究了搪玻璃层热膨胀系数、温差、厚度三个因素对搪玻璃层耐温差急变性能的影响。并通过试验研究对数值模拟结果进行了验证。结果表明搪玻璃层的热膨胀系数越大,越接近金属的热膨胀系数,搪玻璃层耐温差急变性能越好。在不考虑烧成过程中残余应力的情况下,搪玻璃层厚度越大,耐温差急变性能越好。

The thermal shock failure is one of the main failure modes of glass-lined coating. The effect of thermal expansion coefficient, the difference in temperature and the thickness of the glass-lined coating on the thermal shock resistance was researched by numerical simulation. Experimental study was carried out to verify the numerical simulation results. The results indicate that the resistance to the thermal shock of the glass-lined coating increases with increasing the thermal expansion coefficient and the thickness without considering the residual stress produced during the firing process.