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Manganese-containing master alloy was prepared by vacuum induction melting. Effects of factors, such as manganese source, Mn/Al mass ratio, preheating time, and refining time on the composition of the manganese-containing master alloy were studied, and the influence of manganese-containing master alloys replacing the traditional “Mn + Al” feed on the prepared manganese-containing AB5-type rare-earth-based hydrogen storage alloy was also discussed. The experimental results show that compared to manganese powder, manganese flakes as manganese source can bring higher melting yield. Manganese-containing master alloys can be formed with different Mn/Al mass ratios. As the preheating time is prolonged, the melting yield firstly increases and then decreases, and the optimal condition for preheating is 10 minutes at a power of 4 kW. As the refining time increases, the melting yield decreases slightly, and the optimal condition for refining is 1 minute at a power of 15 kW. The average melting yields of rare-earth-based hydrogen storage alloy prepared with MnAlNi alloy and MnAl alloy are increased by 0.37% and 0.78% respectively than that with “Mn + Al” as raw material. The preparation of AB5-type rare-earth-based hydrogen storage alloy with manganese-containing master alloy can optimize the yield, with the hydrogen storage performance not influenced. The application of this method in practical industrial production brings good effect.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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