Weldability of S700MC steel welded with the hybrid plasma + MAG method

Beata Skowrońska , Tomasz Chmielewski , Dariusz Golański , Jacek Szulc

Abstract

The paper describes the microstructure of welded joints produced by the plasma+MAG (Metal Active Gas) method of S700MC high yield strength steel (700 MPa). Welded joints of thermomechanical steel have been made with different values of heat input. The results of metallographic research of welded joints, microstructure of the weld and heat affected zone, hardness distribution and impact toughness are presented. The heat affected zone consists of two sub-zones with different grain size and lowered hardness. The tensile test show that strength of welded joints was slightly reduced and the bending test revealed no crack formation in the weld. The impact toughness of measured welded samples with V-notch in HAZ (heat affected zone) reached high values that are higher comparing to samples with notch placed in the weld area. The investigation results show that the use of plasma concentrated heat source together with MAG welding arc does not significantly change the structure and deteriorate properties of welded S700MC thermomechanically treated high strength steel. The hybrid plasma+MAG welding method has a potential to become a beneficial alternative to other welding processes due to its high efficiency, reduced amount of weld metal content or limited requirements for a preparation of edges of welded joints.
Author Beata Skowrońska (FPE / IoMP)
Beata Skowrońska,,
- The Institute of Manufacturing Processes
, Tomasz Chmielewski (FPE / IoMP)
Tomasz Chmielewski,,
- The Institute of Manufacturing Processes
, Dariusz Golański (FPE / IoMP)
Dariusz Golański,,
- The Institute of Manufacturing Processes
, Jacek Szulc - [SupraElco]
Jacek Szulc,,
-
- SupraElco
Journal seriesManufacturing Review, ISSN 2265-4224
Issue year2020
Vol7
Pages1-15
Publication size in sheets0.5
Article number4
DOIDOI:10.1051/mfreview/2020001
URL https://mfr.edp-open.org/articles/mfreview/pdf/2020/02/mfreview190042.pdf
Languageen angielski
File
mfreview190042.pdf 34.62 MB
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 25-09-2020, ArticleFromJournal
Publication indicators WoS Citations = 3; GS Citations = 8.0
Citation count*8 (2020-08-27)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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