论文部分内容阅读
本文计算了温度、压力与合金元素的浓度对Fe-Cr-Mo系铁素体不锈钢C-O反应平衡的影响,所得结果表明降低压力、提高熔炼温度均对碳氧反应有利,增高铬的含量有不利影响.从计算Si-O反应平衡的结果得出在真空感应冶炼时钢液中硅与氧的浓度接近于平衡值.从计算硅、碳与氧的反应平衡所得结果表明真空度与钢液中的含氧量是决定平衡时硅与碳的浓度的主要因素.列举了电子束“锭块熔化法”与真空感应冶炼的实验结果.得出了钢液中脱碳、脱硅与脱氧速率值.从所得结果看出碳在扩散边界层中的扩散为脱碳速率决定阶段,而硅的脱氧速率决定于钢液中的含氧量.还讨论了改进冶炼工艺的方向.
In this paper, the effects of temperature, pressure and alloying elements on the CO reaction equilibrium of Fe-Cr-Mo ferritic stainless steel were calculated. The results show that both the reduction of pressure and the increase of the melting temperature are favorable for the reaction of carbon and oxygen, The results obtained from the calculation of the Si-O reaction equilibrium result in that the concentration of silicon and oxygen in the molten steel is close to the equilibrium value in vacuum induction smelting.Through calculating the reaction equilibrium between silicon and carbon and oxygen, Oxygen content is the main factor that determines the concentration of silicon and carbon in the equilibrium.The experimental results of electron beam “ingot melting method ” and vacuum induction smelting are listed, and the decarburization, desilication and deoxidation The results show that the diffusion of carbon in the diffusion boundary layer is the deciding stage of the decarburization rate, while the deoxidation rate of silicon is determined by the oxygen content in the molten steel, and the direction of improving the smelting process is also discussed.