Proneness to hot embrittlement of welded joints in steel 09G2S
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Welded joints of steel 09G2S after holding for 1000 h at elevated temperatures (340–540°C) are prone to hot embrittlement because of the segregation of deleterious admixtures of type (phosphorus) on the ferrite-carbide interfaces, including the boundaries of lamellar cementite particles contained in colonies of pearlite.
The development of hot embrittlement in the metal of the welding seam and in the heat-affected zone of the welded joint of steel 09G2S is accompanied by increased intercrystalline failure in the brittle zones of the fractures of impact test specimens.
KeywordsPhosphorus Welding Brittle Elevated Temperature Test Specimen
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