Ya LUO; ;
. 2014, 45(07): 23-0.
Abstract (
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It is tended to be burnt for alloying elements, strengthening particles are tended to aggregating during TIG in -situ welding for MGH956 alloy. In this paper, effects of heat treatment on TIG in-situ alloying welded MGH 956 alloys organization were studied. Filler material of ωV = 2.0% was added in the welding process, heat preservation time was 2.0 h, temperature was 700℃, followed by air cooling. After heat treated, the grain boundary aggregation significantly reduced, more fine dispersion of particles generated in the weld, which are mainly YAlO3, TiC and TiN particle by EDS analysis, in addition, (Ti, V) C composite particles were fund. By atomic probe analysis, the segregation of element Y reduced, thereby reducing the porosity of the weld after heat treatment, ultimately, performance of the joint improved.