Effect of chemical composition on the properties of the weld metal steel welded joints 08H18AN5

Abstract

The results of studies on the influence of the chemical composition of weld metal, weld
standard and new welding consumables for manual arc welding with coated electrodes, TIG
welding consumable electrode doped, automatic submerged arc welding, steel 08H18AN5 on
mechanical and corrosion properties of welded joints. It is found that the mechanical properties of
welded joints does not depend on the method and welding conditions, as conditioned by the
chemical composition of the weld metal. The grain size of the HAZ in welding processes has not
changed, the 7th corresponds score as the base metal in a state of delivery. Resistance welded joints
to intergranular corrosion in the initial state after welding is caused by resistance of the weld metal,
and, after provoking annealing at 6500С for an hour - resistance of the weld metal and heat affected
zone. The optimum combination of mechanical properties and resistance to intergranular corrosion
08H18AN5 steel welded joints is achieved when the content of the weld metal of 17-18 %
chromium, 6-7 % nickel, 2-3 % manganese, 0,12-0,15 % nitrogen, carbon 0,05 %.
From the standard materials the best results are obtained by the use of wire Sv-01H19N9
and Sv-07H20N9G7T with TIG welding electrodes NIAT-1 or CL-11 for manual arc welding, St-
07H19N10B wire for automatic welding under flux AN-26.