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为改善钢的硬化性,50多年来使用0.001％—0.003％的硼已是确定的作法,并已导致硼铁的需求量增加到每年2000—3000吨,许多国家在传统的铝热法工厂里进行了硼铁生产。 一种含3％硼的非晶态铁硅合金软磁性能的发现,它可降低配电变压器的铁芯损失到相当取向性硅钢体系的四分之一,已导致硼铁潜在需求量在90年代中期可能上升到约50000吨。由于要求不含铝的产品,硼铁将必须在埋弧电炉中或由川崎钢公司小规模高炉系统中生产,所产的母合金含10％B,13％Si,0.6％C。 评述了近来在高速淬火工艺中的发展以及在原型非晶态金属芯变压器评价方面的进展。 相同的快速淬火方法用于生产钕—铁—硼永磁体,它可以取代在汽车和家用设备中的钐—钴磁体,对硼铁的需求将有少许的影响,但可能导致对金属钕的大量新需求。
To improve the hardenability of steels, the use of 0.001% -0.003% boron for more than 50 years has been the established practice and has led to an increase in the demand for ferroboron to 2000-3000 tons per annum, many in traditional Pyrex processes Ferroboron production was carried out. The discovery of a soft magnetic property of a 3% boron-containing amorphous iron-silicon alloy reduces the core loss of distribution transformers by a quarter of that of a fairly oriented silicon steel system and has led to a potential demand for ferroboron of 90 Mid-century may rise to about 50,000 tons. Due to the requirement of an aluminum-free product, ferroboron will have to be produced in a submerged arc furnace or in a small-scale blast furnace system by Kawasaki Steel. The resulting master alloy contains 10% B, 13% Si and 0.6% C. The recent developments in high-speed quenching and the progress in the evaluation of prototype amorphous metal core transformers were reviewed. The same rapid quenching method used to produce neodymium-iron-boron permanent magnets, which can replace samarium-cobalt magnets in automotive and household appliances, will have a slight impact on the demand for ferroboron but may result in a large amount of neodymium new demand.