Research on Argon Tungsten Arc Welding Process of R60702 Zirconium
This paper introduces the characteristics of R60702 zirconium material,analyzes the weldability of the material,and briefly describes the influencing factors of zirconium welding and the requirements for the surface color of zirconium welded joints.The 13.5mm R60702 zirconium plate was used in the welding test,and the welding method was tungsten argon arc welding.The physical and chemical properties of the welding test plate were tested in the welding state,550 ℃ heat treatment state and 620 ℃ heat treatment state.The test results showed that the tensile strength and bending test of the welding state and heat treatment state could meet the standard requirements,but the tensile strength of the welded joint in the heat treatment state decreased to a certain extent.The hardness and microstructure metallography of the weld and heat affected zone were analyzed.The microstructure of the weld and heat affected zone was α'Phase(martensitic phase of zirconium),which leads to the increase of hardness of weld and heat affected zone.
R60702 zirconiumargon tungsten arc weldingweldingheat treatmentphysical and chemical testsmicroscopic metallography
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维普
