Abstract：The composition range of master superalloy was narrow.A bath rapid analysis method of the main, micro and trace elements in master superalloy was established by the means of comprehensive detection. The master superalloy melt was sampled in the vacuum induction furnace by secondary immersion method with the aluminum corundum sampling cup (30 mm). The sampling was completed after solidification and quick cooling. The first specimen with a thickness about 8 mm was cut from the tail of the on-the-spot sample to determine the contents of trace elements by glow discharge mass spectrometer (GDMS). The second specimen with a thickness about 5 mm was cut from the remaining sample, and then cut into a strip with a width about 5 mm and length of 30 mm. The strip was polished and then cut into particles with the mass of 0.5-1.0 g. After cleaning with acetone, the particles were used for the determination of carbon, sulfur, oxygen, nitrogen and hydrogen. The third specimen with a thickness about 8 mm was sequentially cut from the remaining sample for the testing of main elements by X-ray fluorescence spectrometer (XRF). Then the content of boron was determined by spark discharge atomic emission spectrometer. Finally, the test results were summarized with the laboratory data docking system and then rapidly transmitted to the smelting control room. The influence of sampling cup internal diameter, heat treatment temperature and immersion times on the internal quality of the on-the-spot sample was investigated. Meanwhile, the influence of sampling cup material on the impurity elements in the on-the-spot sample and the distribution of different elements in the on-the-spot sample column was investigated. The testing time was optimized by selecting the sample preparation method and equipment. This analysis method realized the rapid analysis of more than 40 major, trace and trace elements in the high-temperature master superalloy within 25 minutes. The proposed method had been applied in the smelting of master superalloy, and provided accurate data for the effective control of the main elements as well as the purification of master superalloy.
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