Sustainable Mining and Metallurgy

Based on the Chinese Patent Retrieval Database, this paper analyzed the current situation and development trend of the technical branch of smelting method through the statistics data of the patent application trend, applicant type and geographical distribution characteristics of nickel-based superalloy prepared by smelting method in China. The result of the analysis showed that, as basic production method, single smelting method had the most patents, which mainly focused on improving the purity of melt from two aspects namely smelting process and smelting equipment; in recent years, improving the purity of melt via adapting combined technical means become the major research direction; The nickel based high temperature alloy produced with double smelting method has shown a trend of industrialization and triple smelting method will be developed at high speed in China.