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- W2380165511 abstract "For the cracks appearing on outer pipe wall,wrinkling on inner pipe wall,distortions on cross-section and so on in the bending process of big diameter bent pipe,the welding process will be carried on by means of pre-bending heat treatment to relieve the internal stress,adopting manual electrode welding as base welding and submerged arc welding as full welding to form the joint.Furthermore,the joint of pipe had been tested by tension,fracture scanning and crack-tip opening displacement.The test results show that the broken position of welding joint mainly located in the area of base metal and the tensile strength values met the standards.The fracture appearance of base metal is mainly formed by the gathering of tiny and flat dimples.Its impact toughness is lower than the welding lines while cracking.The average CTOD value of welding line at-20° is 1.39,while the average CTOD value of base metal is 0.82." @default.
- W2380165511 created "2016-06-24" @default.
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- W2380165511 date "2010-01-01" @default.
- W2380165511 modified "2023-09-24" @default.
- W2380165511 title "Study on big diamter bent pipes formed by welding technique" @default.
- W2380165511 hasPublicationYear "2010" @default.
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