Research on TIG-SMAW united welding process of Q345E and 20 dissimilar steel pipes
Welding test and welded joint mechanical properties of Q345E and 20 steel dissimilar steel pipes were carried out by TIG-SMAW united welding process.Results show that welded joints of Q345E and 20 steel dissimilar steel pipes have good process performance.X-ray flaw detection is not lower than grade Ⅱ,tensile strength is 542 MPa and 536 MPa respectively,impact energy at-20 ℃ is not less than 33 J,and there are no cracks in weld and heat-affected zone on curved surface of lateral bending specimen,which meets requirements of NB/T 47014-2011.
Q345E20 steelTIG-SMAW united weldingmechanical property
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