Adapter Socket Clevis Double Tongue

The operation bears the static load tension of the hanging wire and the effect of wind, rain, snow, ice, etc. on the wire, which increases the stress level of the failed bowl head. At the same time, the iron tower where the failed bowl head is located is near the thermal power plant. The large amount of water vapor, flue gas and other industrial gases containing corrosive media (such as SO₂, H₂S, NaCl, etc.) discharged from the power plant for a long time may pass through the surface of the casting without being dense. The galvanized layer directly corrodes the matrix of the casting fittings. There are a large number of surface and core cracks in the fracture failure bowl head analyzed this time, and its characteristics are entirely intergranular corrosion and stress corrosion. The sudden fracture of the bowl head casting is the result of this double corrosion damage. On the other hand, the casting defects such as poor spheroidization, porosity, and shrinkage porosity in the double-joint bowl head castings also severely weaken the mechanical properties of the material matrix, thereby accelerating the growth of corrosion cracks. Due to the long-term stress of the bowl-head casting, under the combined action of corrosive environment and stress, crack sources will be generated at the defects on the surface of the casting, and it will rapidly expand inward along the grain boundary, causing stress corrosion cracking of the bowl-head casting.

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