The Paton Welding Journal, 2009, №03



2009 №03 (01)

2009 №03 (03)

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TPWJ, 2009, #3, 8-11 pages

THERMOKINETIC PECULIARITIES OF FORMATION OF COLD CRACKS IN WELDED JOINTS ON HARDENING HEAT-RESISTANT STEELS

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 3, 2009 (March)
Pages                      8-11
 
 
Authors
V.Yu. SKULSKY
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Crack resistance of welded samples of steels with martensite and martensite-bainite transformations under isothermal conditions at different heating temperatures was studied by using the «Implant» testing machine equipped with the automatic heating and temperature monitoring system. It is shown that the risk of cold cracking of welded joints on martensitic steels is run in cooling after welding, starting from temperatures of 140-120 °C. The welded joints on steel with the bainitic-martensitic structure become sensitive to cracking at a temperature below 80 °C.
 
 
Keywords: arc welding, heat-resistant steels, welded joints, cold cracks, delayed fracture, temperature effect, structure, martensite, bainite
 
 
Received:                03.12.08
Published:               28.03.09
 
 
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