Automatic Welding, 2017, №10



2017 №10 (05)

DOI of Article 10.15407/as2017.10.06

2017 №10 (07)

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Avtomaticheskaya Svarka (Automatic Welding), #10, 2017, pp. 52-56
 

Influence of welding wire composition on weld quality in welded joints of dissimilar steels in gas-shielded mechanized welding

V.P. Elagin

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
For welding of dissimilar joints, the high-alloy welding materials are widely used. It is shown that the use of shielded arc mechanized welding method of dissimilar austenitic and pearlitic steels is limited due to formation of defects in the austenitic multilayer weld, such as lacks of fusion and lacks of penetration caused by appearance of a refractory oxide crust on the deposited metal surface. It is possible to increase the weld quality by providing its self-separation from the metal surface in the process of cooling. This is achieved by presence of a high content of such elements as silicon, titanium, zirconium, etc. in the welding wire, which reduce the amount of spinels based on chromium, nickel, molybdenum and others in the composition of oxide crust and increase the amount of brittle glassy phase. 15 Ref., 3 Tables, 1 Figure.
Keywords: welding wire composition, mechanized arc welding, shielding gas, dissimilar steels, oxide crust, self-separation of crust
 
 
Received:                18.09.17
Published:               13.11.17
 
 
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