Influence of the area of the sections of an unremelted production joint on the properties of weld joints of a bimetal

An investigation was made of the influence of the basic production parameters of the welding conditions on the area of the unremelted portion of the production joint and the interrelationship of this area and the indices determining the service reliability of the weld joint is established. In the experiments a 14 mm thick 16GS + 12Kh18N10T bimetal, 4 mm diam. Sv-08Kh25N13BTYu and Sv-03MYu welding wire, 5 mm diam. Sv-08A welding wire, and AN-26s and AN-348A welding fluxes were used. The plan of assembly and the order of applying the weld joints are shown. An analysis of the results showed that the basic parameters of the welding conditions presented have an insignificant influence on the area of the unremelted portions of the production joint. On the basis of data obtained, recommendations have been developed on the use of the welding variation with use of a production joint in production of chemical and petroleum apparatus.