1问题的发现玉林市检验所辖区一台快装锅炉锅筒底部发生泄漏,接报后到现场查看,发现位于炉膛中央的锅筒底部有一φ300mm凸起,高度5mm。凸起中部沿周向有一裂口,裂口长250mm;进入锅筒发现锅筒受热面覆盖了2~3mm水垢。鉴于开裂属于严重的缺陷,于是将变形区的钢板割下带回单位进行金属检验。2金属检验2.1宏观检验将水垢清除后发现,垢下的金属表面有较厚的氧化层,将氧化皮磨除后发现除位于变形区正中有一裂口外,在水侧尚有多条宏观裂纹分布于裂口两侧且基 1 The discovery of the problem Yulin City, under the jurisdiction of a fast boiler drum boiler leak at the bottom, after receiving the report to the scene and found that the bottom of the drum in the central furnace has a φ300mm raised at a height of 5mm. Raised central along the circumferential direction there is a rift, rift length 250mm; into the drum and found the heating surface of the drum covered 2 ~ 3mm scale. In view of the cracking is a serious defect, so the deformation of the steel plate cut back unit for metal inspection. 2 metal inspection 2.1 macroscopic examination After the scale was found, found under the scale of the metal surface has a thick oxide layer, the oxide scale removed found in addition to the middle of the deformation zone there is a gap in the water side there are still a number of macro-cracks distribution On both sides of the gap and base