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用热模拟、扫描电镜、Ｘ射线衍射等对喷瓷管道焊接热敏感性进行了研究。结果表明，随着峰值温度的提高，基体金属的硬度提高，组织由Ｆ＋Ｐ转变成Ｂ＋Ｆ＋Ｐ；峰温为１３５０℃、１２００℃时，基体金属中产生大量晶间微裂纹，金属与瓷层界面无裂纹但出现气泡；峰温为９５０℃、７００℃时，金属与瓷层界面无气泡但产生了界面裂纹；峰温低于１２００℃时，瓷层相结构主要为玻璃态，由少量晶相Ｎａ２ＭｏＯ４（ＭｏＯ３）ｙ析出；峰温为１３５０℃时，瓷层全部转变为玻璃态。
Thermal simulation, scanning electron microscopy, X-ray diffraction, etc. were used to study the thermal sensitivity of the porcelain pipe welding. The results show that with the increase of the peak temperature, the hardness of the matrix metal increases and the microstructure changes from F + P to B + F + P. When the peak temperature is 1350 ℃ and 1200 ℃, a large amount of intergranular microcracks are generated in the matrix metal, But the bubbles appeared at the peak temperature of 950 ℃. When the peak temperature was lower than 1200 ℃, the phase structure of the ceramic layer was mainly glassy and the microstructure of the ceramic layer was composed of small amounts of Na2MoO4 ( MoO3) y precipitates; When the peak temperature is 1350 ℃, the porcelain layers all turn into glassy state.