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THE BEHAVIOR OF INTERFACICAL CREEP DAMAGE OF DISSIMILAR WELDED JOINT BETWEEN MARTENSITE AND BAINITE HEAT-RESISTANT STEEL |
zhang Jian-Qiang |
武汉大学 |
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Cite this article:
zhang Jian-Qiang. THE BEHAVIOR OF INTERFACICAL CREEP DAMAGE OF DISSIMILAR WELDED JOINT BETWEEN MARTENSITE AND BAINITE HEAT-RESISTANT STEEL. Acta Metall Sin, 2007, 43(12): 1275-1281 .
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Abstract Abstract The creep rupture strength, creep damage and characteristics of interfacial failure of dissimilar welded joint between martensite (9Cr1MoVNbN) and bainite steel(12Cr2MoWVTiB) are been investigated by means of argon gas shielded tungsten pulsed arc welding, high temperature accelerated simulation, creep rupture test, in view of dissimilar welded joint between martensite (9Cr1MoVNbN) and bainite steel(12Cr2MoWVTiB).The research results indicate that the interfacial creep damage of undermatching welded joint is very serious, and the interfacial failure occurred, the early failure tendencies are higher than those of overmatching and medium welded joint. The creep damage and early failure tendency of medium matched joint are lower than those of overmatching and undermatching welded joint, and only isolated holes are found in the test. The creep rupture strength ( ) of medium matching joint is almost the same as that of undermatching joint. The creep rupture strength overmatching joint is the least one, therefore, it is reasonable that the medium matched is used for the dissimilar welded joint between martensite and bainite steel.
KEY WORDS Martensite heat-resistant steel, bainite heat-resistant steel, dissimilar metal welding joint, creep damage, early failure
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Received: 20 December 2006
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