Lanthanum-cerium mixed rare earth ferroalloy for rare earth steel production
A technology of mixing rare earths and iron alloys, which is applied in the field of metal materials to achieve the effects of increasing yield, improving welding performance, and improving plasticity
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[0023] Example 1
[0024] High-quality industrial pure iron and mixed rare earth alloy with content of 35% lanthanum (La) and 65% cerium (Ce) are selected as raw materials, and a vacuum induction furnace lined with alkaline earth metal oxide crucible is selected as the smelting device. Different smelting parameters such as smelting temperature and pressure are used. The lanthanum-cerium mixed rare-earth iron alloy used in the production of rare earth steel, its chemical composition is calculated by weight percentage, including: La: 5.0%, Ce: 9.3%, C: 0.04%, P: 0.008%, S: 0.005%, and the rest are Fe and other unavoidable impurities.
[0025] The mixed rare earth ferroalloy is used to produce the Q550D steel grade of Baotou Steel's wide and thick plate production line, which significantly improves the rare earth yield. The comparison results are shown in Table 1.
[0026] Table 1 Yield comparison results
[0027] Types of rare earth alloys
Example Embodiment
[0028] Example 2
[0029] High-quality industrial pure iron and mixed rare earth alloys with a content of 35% lanthanum and 65% cerium are used as raw materials, and a vacuum induction furnace lined with alkaline earth metal oxide crucibles is used as the smelting device. Different smelting temperatures are used according to the content of rare earth during smelting. , pressure and other melting parameters. The lanthanum-cerium mixed rare-earth iron alloy used in the production of rare earth steel, its chemical composition is calculated by weight percentage, including: La: 6.5%, Ce: 12.0%, C: 0.03%, P: 0.007%, S: 0.004%, and the rest are Fe and other unavoidable impurities.
[0030] The mixed rare earth ferroalloy is used to produce Q550D steel grade of Baotou Steel's wide and thick plate production line, which significantly improves the rare earth yield. The comparison results are shown in Table 2.
[0031] Table 2 Yield comparison results
[0032] Types of rare e...
Example Embodiment
[0033] Example 3
[0034] High-quality industrial pure iron and mixed rare earth alloys with a content of 35% lanthanum and 65% cerium are used as raw materials, and a vacuum induction furnace lined with alkaline earth metal oxide crucibles is used as the smelting device. Different smelting temperatures are used according to the content of rare earth during smelting. , pressure and other melting parameters. The lanthanum-cerium mixed rare-earth iron alloy used in the production of rare earth steel, its chemical composition is calculated by weight percentage, including: La: 4.0%, Ce: 7.5%, C: 0.02%, P: 0.006%, S: 0.004%, and the rest are Fe and other unavoidable impurities.
[0035] The mixed rare earth ferroalloy is used to produce the Q550D steel grade of Baotou Steel's wide and thick plate production line, which significantly improves the rare earth yield. The comparison results are shown in Table 3.
[0036] Table 3 yield comparison results
[0037] Types of rar...
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