Features in the formation of the structural state of low-carbon micro-alloyed steels after eletron beam welding

Welding thermomechanically-strengthened materials is accompanied with certain difficulties in terms of loss strength characteristics the zone thermal influence. This issue can be resolved by using technological welding schemes that include fusion a narrow contact area. One such scheme electron beam welding, which currently widely used to fabricate structures from refractory and chemically active materials. main advantages process small quantity heat input, leads formation zones melting influence and, as result, minor deformities structure material. The welded joint structurally divided into several zones, differ morphological structure. most interesting, ensuring quality joint, are boundaries between zones. It has been shown use local heating sources, case at migration grains. As clear intersections, lines, form joint. structural state predetermined simultaneous course processes. First, crystallization liquid – structure, well boundary Second, phase-structural transformations solid impact zone, metal. Given this, one should note geometry joints more interrelated than other techniques. Thus, parameters ensure material forms during