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为了进一步完善增氮析氮法生成气泡去除钢液中显微非金属夹杂物技术,研究了真空处理时间、充氮压力、气体类型等因素对钢中全氧和显微非金属夹杂物的影响.结果表明:减压处理过程中,钢液中非金属夹杂物可为过饱和气体氮气形成气泡提供非均相形核核心;增氮析氮法可有效地降低钢中全氧,去除钢中显微非金属夹杂物;真空处理时间越长,钢中全氧和显微非金属夹杂物数量越低,当真空处理时间为30 min时钢中全氧去除率达到了81.6%,而且全氧质量分数最低达到7×10-6.
In order to further improve the technology of removing nitrogen and micro-nonmetallic inclusions in the liquid steel by the method of nitrogen generation and nitrogen removal, the effects of vacuum treatment time, nitrogen pressure and gas type on the total oxygen and microscopic nonmetal inclusions in steel The results show that during the decompression process, the nonmetallic inclusions in the molten steel can provide a heterogeneous nucleation nucleus for the formation of bubbles in the supersaturated gas nitrogen. The nitrogen addition and nitrogen removal method can effectively reduce the total oxygen in the steel and remove the significant Micro-non-metallic inclusions; the longer the vacuum treatment time, the lower the amount of total oxygen and micro-nonmetallic inclusions in steel, the total oxygen removal rate reaches 81.6% when the vacuum treatment time is 30 min, and the total oxygen mass The lowest score reached 7 × 10-6.