Bead-On-Plate Welding on S235JR Steel by Underwater Local Dry Chamber Process

Abstract

The article presents the results of the effect of parameters of underwater local dry chamber welding on the properties of padding welds. The effect of heat input and the type of shielding gas on the structure and hardness of welds was established. the functions for estimating the maximum hardness of the heat affected zone have been also elaborated.

Cold Cracking of S460N Steel Welded in Water Environment

“…The joints made by using wet method show presence of welding imperfections such as gas porosity, shape failures and cracks [8,9]. The issue most often met is steel susceptibility to cold cracking [10][11][12][13]. Water environment significantly intensifies risk of producing such cracks due to the following factors appearing during welding process [1,14]:…”

Badania spawalności stali S460N w środowisku wodnym z wykorzystaniem próby Tekken

“…Najnowsze badania pokazują jednak, że możliwe jest zastosowanie podgrzewania indukcyjnego [20]. Praktyczne zastosowanie znajduje [1,2,11,19]: -zwiększenie energii liniowej spawania; -stosowanie elektrod austenitycznych, których stopiwo jest bardziej plastyczne;…”

Underwater Wet Repair Welding of API 5L X65M Pipeline Steel

“…The technique is characterised by a relatively low cost and possibility of carrying out the welding in situation where application of other methods, e.g. a local dry chamber or dry welding, is either unprofitable or impossible at all [9]. An advantage of wet welding is possible easy operation of welding torch and its drawback is a limited water depth at which a diver-welder is permitted to carry out welding operations.…”

“…The wet welding method with the use of covered electrodes is the most commonly applied to underwater welding [8][9][10][11][12][13]. The technique is characterised by a relatively low cost and possibility of carrying out the welding in situation where application of other methods, e.g.…”