The Paton Welding Journal, 2018, #3, 6-11 pages
Weldability of high-strength alloyed steels with yield strength of 590–785 Mpa
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
This paper summarizes the results of investigations of influence of the thermal cycles, characteristic for arc welding processes, on the structure and mechanical properties of high-strength alloyed steels with yield strength of 590–785 MPa, as well as on their susceptibility to cold crack formation. The structural transformations in the metal of heat-affected-zone of welded joints were investigated using a quick-response dilatometer, and its mechanical properties and susceptibility to cold crack formation were evaluated according to the results of tests of standard specimens and by the Implant method, respectively. The diagrams of the structural transformations of austenite in the region of metal overheating of heat-affected-zone of a number of high-strength alloyed steels, the dependences of change in their mechanical properties during welding, and also the data, characterizing the susceptibility of high-strength alloyed steels to cold crack formation at different concentrations of diffusion hydrogen in the deposited metal, are presented. 15 Ref., 4 Tables, 4 Figures.
high-strength steels, arc welding, metal structure, mechanical properties, cold cracks
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