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介绍了作者在高铁车轴钢和硅片切割丝钢非金属夹杂物控制方面的研究进展:(1)针对高铁车轴钢大型非金属夹杂物问题,在钢超低氧含量控制基础上(w(T.O)=0.000 45%~0.000 6%),通过进一步强化RH真空精炼、严格控制二次氧化、生成液态夹杂物以抑制其相互聚集等措施,使钢中大型非金属夹杂物得到有效控制;(2)针对硅片切割丝生产由于夹杂物造成的断丝问题,通过减少CaOSiO_2-Al_2O_3系夹杂,在钢中生成MnO-SiO_2-Al_2O_3/SiO_2复相夹杂物,并严格控制外来夹杂物,使切割丝拉拔抗断裂性能显著提升;(3)采用该研究开发的夹杂物控制技术,马钢生产高铁轮对已用于沪昆高铁线列车,邢钢生产直径0.12mm切割丝,不断丝长度提高至1万km以上,达到了国际顶级切割丝质量水平。
(1) Aiming at the problem of large non-metallic inclusions in high-speed railway axle steel, based on the control of ultra-low oxygen content of steel (w (TO ) = 0.000 45% ~ 0.000 6%). The large-scale non-metallic inclusions in steel were effectively controlled by further strengthening the RH vacuum refining, strictly controlling the secondary oxidation and generating liquid inclusions so as to suppress their mutual aggregation. (2) Aiming at the problem of broken wires caused by inclusions in the production of silicon cutting wire, MnO-SiO 2 -Al 2 O 3 / SiO 2 composite inclusions are formed in the steel by reducing the inclusions of CaOSiO 2 -Al 2 O 3 and the foreign inclusions are strictly controlled so that the cutting wires (3) Using the research and development of inclusions control technology, the production of high-speed rail wheels from Masteel has been used in Shanghai-Kunming high-speed rail line and Xinggang Steel Co., Ltd. has produced 0.12mm diameter cutting wire, 10,000 km above, reached the international top quality cutting wire.