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TIG Welding of Defective Leaded Bronze Castings
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Indian Railways are one of the major consumers of leaded bronze castings in the country. The necessity of a procedure for salvaging defective leaded bronze castings was felt when, in the foundries, due to minor defects viz. porosities, blow holes, small cracks etc. at or adjacent to the surface, castings had to be remelted resulting in the loss of metals, man hours, etc. Though the appropriate method for bringing down rejection is elimination of such defects by proper method study, a number still contain such defects, which can be reclaimed by welding.
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