The Paton Welding Journal, 2012, №03



2012 №03 (02)

2012 №03 (04)

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The Paton Welding Journal, 2012, #3, 11-14 pages  

INFLUENCE OF AUSTENITIZING MODE ON LOCAL FRACTURE SUSCEPTIBILITY OF WELDED JOINTS OF 03Kh16N9M2 STEEL

Yu.V. POLETAEV

Volgodonsk Affiliate of South-Russian State Technical University, Volgodonsk, RF
 
 
Abstract
Influence of parameters of thermal cycle of austenitizing on formation of structural and chemical homogeneity and local fracture resistance of HAZ metal in production welded joints of austenitic steel 03Kh16N9M2 was investigated. It is established that development of processes of formation and growth of carbides and carbonitrides, stimulating welded joint susceptibility to local fracture, is difficult in low-carbon HAZ metal. Inexpediency of conducting high-temperature heat treatment, i.e. austenitizing of welded joints of 03Kh16N9M2 steel, is proved experimentally, as repeated heating up to T = 1323-1373 K for 1-4 h did not promote an improvement of HAZ metal resistance to local fracture.
 
 
Keywords: arc welding, welded joints, low-carbon austenitic steel, heat-affected zone, structural and chemical microinhomogeneity, austenitizing, high-temperature low-frequency loading, local fracture
 
 
Received:                29.11.11
Published:               28.03.12
 
 
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