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随着我国工业的发展,对轴承钢的质量提出了更高的要求,特别是精密轴承制造业,迫切需要极为纯净的钢。目前国外对重要用途的轴承钢几乎都是用真空熔炼法生产的,由于它对脱氧、去除夹杂和减少夹杂尺寸上的显著作用,就精密轴承用钢而论,大大提高了轴承制造的成品率。文献指出:真空感应炉熔炼C-Cr钢的精密轴承套圈由于小夹杂报废的仅3％,而普通熔炼的则要高许多倍。苏联的试验结果指出,真空自耗电弧炉重熔C-Cr钢的仪表轴承制造的报废率由普通熔炼的40％降低至≤8％。在生产钢的纯净程度方面,目前生产轴承的实践得出的次序即由坏至好为:普通熔炼钢、真空自耗炉重熔
With the development of our country’s industry, the quality of bearing steel is put forward higher requirements, especially in the precision bearing manufacturing industry, an urgent need for extremely pure steel. At present, almost all foreign bearing steel for important uses are produced by the vacuum melting method. Due to its significant effect on deoxidation, inclusion removal and inclusion size reduction, the precision of bearing steel is greatly improved. The yield of bearing manufacturing is greatly increased . The literature points out that the precision bearing ferrules for C-Cr steels in vacuum induction furnaces are only 3% scrapped due to small inclusions, which is many times higher than in conventional smelters. Soviet test results show that the vacuum consumable electric furnace remelting C-Cr steel instrument bearing scrap reduction rate from 40% of ordinary smelting down to ≤ 8%. In the production of steel purity, the current practice of producing bearings that order from bad to good as follows: ordinary smelting steel, vacuum consumable remelting furnace