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Abstract: The mechanical properties , creep rupture strength , creep
damage and characteristics of interfacial failure of dissimilar welded
joint between martensite (9Cr1MoVNbN) and bainite steel (12Cr2MoWVTiB)
are investigated by means of argon gas shielded tungsten pulsed arc
welding, high temperature accelerated simulation, creep rupture,
mechanical properties test. The research results indicate that the
interfacial creep damage of overmatched and undermatched welded joint is
serious, and the reductions of mechanical properties are obvious, the
failure tendencies are higher than that of medium welded joint. The
creep rupture strength of medium matched joint is almost the same
as that of undermatched joint, and the creep rupture strength
overmatched joint is the least one, therefore, it is reasonable that the
medium matched is used for dissimilar welded joint between martensite
and bainite steel.
Key words: Martensite heat-resistant steel Bainite heat-resistant steel
Dissimilar metal welded joint Interfacial failure
CLC No: TG407
Received 20020416,
received in revised form 200201018
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