TPT May 2010

W elding T echnology

Anyone whose project involves the joining of metal knows that welding is crucial to a smooth manufacturing process. More than that, the professionals whose products and services are reviewed here think of the welded joint as the essential link in a structure. Their welding culture of soundness and dependability has been evolving ever since it was discovered that two pieces of metal can be made – in the right hands, and with the right technique – into a third thing of greater utility and value. But every point of that development is only a way-station. As materials are formulated for greater strength, corrosion resistance, and other performance factors, welding can only become more challenging. Ever-closer monitoring of the auxiliaries of the welding operation – the base metal, filler metals, gases – will be required. Welding will have to be performed under water and in other liquids, with no adverse effect on the weldment. Pre- and post-weld heat treatment and other techniques will enhance weldability; but for broad acceptance their costs must be brought well down. Welding is a mature process. But given the greater demands made of a welded joint all the time, very possibly the glory days of welding lie ahead of it.

Photo: Oerlikon Schweißtechnik GmbH