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某厂循环流化床锅炉的高温再热器为TP30 4 H钢鳍片管 ,现场组装焊接时 ,在鳍片与管子的角焊缝处出现多处裂纹。通过进行金相试验、断口分析及能谱微区成分分析 ,认为焊接热裂纹是造成开裂的主要原因。提出了提高焊接质量 ,防止焊接热裂纹的措施
A factory circulating fluidized bed boiler high temperature reheater for the TP304H steel fin tube, the site assembly welding, fins and pipes in the fillet weld at many cracks. Through the metallographic test, fracture analysis and energy spectrum micro-component analysis, it is considered that the welding heat crack is the main reason of cracking. Proposed to improve the quality of welding to prevent welding hot cracking measures