Accurate Determination of Trace Sulfur in Superalloys and Its Application

Abstract

The accurate determination technology of trace sulfur in superalloys adopts the latest infrared carbon/sulfur analyzer CS844ES, and carries out technological innovation in five aspects: the three calibrations technology at both ends, the ultrapure composite flux, the reference material traceability technology, the blank influence value determination technology, and the criteria for the accurate determination of trace sulfur. The lower limit of sulfur measurement is extended to 0.5ppm. After appraisal, it has reached the international advanced level. Two reference materials of wrought superalloy GH4169 with trace Sulfur concentration were developed by this technology. Finally, the accurate determination technology of trace Sulfur in superalloys, independent intellectual property rights and trace sulfur reference materials constitute a “Trinity” technical system. This technical system was used to measure GH4169 superalloy in the United States and China at the same time, and the results showed that there are differences in sulfur content among them. This technology is mainly applied independently and has been applied in relevant units and won many technical awards.