Bitte wählen Sie ihr Lieferland und ihre Kundengruppe
This report covers the welding and testing of five arc welded butt joints in 1/2 inch homogeneous armor plate. The use of auxiliary connecting members, welded to the armor plate prior to tempering, permits of welding the joint after tempering without bringing the weld metal in contact with the tempered plate. This procedure permits a butt joint to be made by welding without sacrificing any of the ballistic properties of the tempered armor plate at the joint or adjacent to it. By using an overlay of austenitic weld metal on the armor surface, a slight improvement in ballistic properties of the joint seems to be effected over that obtained when the overlay is not used and the welding is performed directly on the tempered plate surface. There appears to be less tendency for the weld metal to crack when the austenitic weld metal overlay is used on the armor plate surface than when no overlay is used. With the half inch thick auxiliary connecting members butt welded and no weld between the abutting armor edges, a ballistic strength very close to that of 1 inch thick armor is obtainable and the welding problem is simpler than when the weld is made between the abutting armor edges only.