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采用自行设计的带超声波振动的电渣炉,研究了超声波功率对轴承钢中氧化铝夹杂物分布及去除的影响.结果表明,电渣重熔过程中超声波功率从0增至400和700 W,钢锭中的夹杂物最大尺寸分别是40,36和14μm,功率增至1000 W时,夹杂物最大尺寸增至36μm.电渣重熔过程中无超声波时,钢锭中夹杂物在试样边部与中心部位聚集,边部聚集尤为严重.超声波功率增加,夹杂物聚集逐渐减弱直至均匀分布.超声波去除夹杂物主要是其空化和声流效应改善了渣-金间反应的动力学条件,使夹杂物均匀分布于钢锭中.但超声波功率过高会降低渣-金间的反应速率,引起金属熔池扰动,降低电渣精炼能力.
The influence of ultrasonic power on the distribution and removal of alumina inclusions in bearing steel was investigated by using a self-designed electroslag furnace with ultrasonic vibration.The results show that the ultrasonic power increases from 0 to 400 and 700 W during the ESR process, The maximum size of inclusions in the steel ingot is 40, 36 and 14μm, respectively, and the maximum size of the inclusions increases to 36μm when the power is increased to 1000 W. When there is no ultrasonic wave in the ESR process, The central part is aggregated, and the edge part is more serious.With the increase of ultrasonic power, the concentration of inclusions gradually decreases until the uniform distribution.The removal of inclusions by ultrasonic wave is mainly due to its cavitation and acoustic flow effect, which improves the dynamic conditions of slag- The material evenly distributed in the ingot.But the ultrasonic power is too high will reduce the reaction rate between slag - gold, causing the metal pool disturbance, reduce the ability of electroslag refining.