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在用石油液化气储罐内壁接管角焊缝收弧裂纹是该设备首次开罐检验时的常见缺陷.接管部位的结构形式及易产生裂纹的位置如图1所示.通过对这类裂纹的宏观观察和金相分析,发现有如下共同点:(1)产生部位.裂纹发生在角焊缝收弧处中心部位,多数情况下靠近罐体侧并平行于焊缝熔合线.(2)外观特征.用肉眼较难看到,以旋转磁场方式进行磁粉检
In the liquefied petroleum gas storage tank wall to take over the fillet weld arc cracking cracks is the first time the device open the tank inspection of the common defects.The takeover site structure and easy to crack the location shown in Figure 1. Through the crack Macroscopic observation and metallographic analysis revealed the following common ground: (1) The site of occurrence. Cracks occurred at the center of the fillet of the fillet weld, in most cases close to the tank side and parallel to the weld line. (2) Appearance Characteristics with the naked eye is more difficult to see, the way to conduct magnetic field magnetic particle inspection