Abstract
Abstract Single pass multi-layer welding tests were carried out on 10Ni5CrMoV steel plate for construction, the effects of welding energy input and welding speed on the microstructures, hardness and impact energy at −40 °C of 10Ni5CrMoV steel welded joints were studied. The results showed that, with the decrease of welding energy input and the increase of welding speed, the structure in the weld zone gradually transforms from granular bainite to martensite and a small amount of upper bainite, and the grain size in the coarse and fine grain areas in the heat affected zone gradually decreases, and the content of granular bainite decreases. The optimum welding process for 10Ni5CrMoV steel is welding energy input with 7.5 KJ/cm and welding speed with 1.25 m/min, at this time, the weld structure is granular bainite, acicular ferrite, a small amount of upper bainite and a small amount of martensite; The dispersed Al2O3, TiN or TiC composite phase formed during welding process can be used as nucleation core of ferrite, helpful to form acicular ferrite in the weld zone, and the welded joint of 10Ni5CrMoV steel has the best impact toughness.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
