20130319649 | COOLING RING FOR WELDING BELLOWS GENERATING LESS METAL POWDER - Provided is a cooling ring for welding used to manufacture a bellows including a plurality of pairs of barriers, each pair formed of a first barrier and a second barrier disposed to face the first barrier. The cooling ring includes a body formed as a circular arc shape, disposed to attach the first barrier and the second barrier closely to each other while being in contact with at least one of the first barrier and the second barrier, the body including copper and a plating layer plating the body. The plating layer includes at least one selected from the group consisting of nickel and chrome. | 12-05-2013 |