运用金相分析、SEM显微观察及能谱分析方法,研究热力管道中波形补偿器在使用条件下发生开裂的原因。实验结果表明,由于出口端环与出口管存在间隙,污水污泥等沉积在波形补偿器内表面,当腐蚀物质发生浓缩,沉积在内表面的腐蚀性成分Clˉ浓度大大增加,使得1Cr18Ni9Ti不锈钢发生点蚀,以至波形补偿器发生应力腐蚀,从而导致开裂。 The causes of cracking occurred under the conditions of use were studied by means of metallographic analysis, SEM observation and energy spectrum analysis. The experimental results show that due to the gap between the outlet end ring and the outlet pipe, sewage sludge and the like are deposited on the inner surface of the wave compensator. When the corrosion substance is concentrated, the concentration of Clˉ, which is a corrosive component deposited on the inner surface, greatly increases, causing 1Cr18Ni9Ti stainless steel to occur Erosion, as well as the waveform compensator stress corrosion, resulting in cracking.