Patent ID: 7727339
Filing Date: 2010-06-01
Classification: B23K

Abstract:
1. A flux adapted for submerged arc welding, said flux comprising a carbon dioxide containing compound and an effective amount of heat releasable carbon dioxide is in the range of 0.5-3.5% by weight of the flux and, over 15% by weight of low melting point compounds and a binder, said flux being a highly basic particle flux that produces less than 7 ml/100 grams of diffusible hydrogen in the weld metal, said flux having a basicity index of greater than 2, said carbon dioxide containing compound includes a carbonate, said low melting point compounds including silicate, manganese oxide, and fluoride said fluoride constituting between 15 and 30 weight percent of said flux, said manganese oxide constituting between 1 and 5 weight percent of said flux, and said silicate constituting between 18 and 30 weight percent of said flux.