铁水在熔炼与浇注过程中发生的氧化现象,不同程度地影响铁水充填铸型的本能、凝固形核和收缩特性,因而导致铸件缺陷的形成。为保证铸件质量,应对铁水中的含氧量进行控制。铸件要求不同,凝固特点各异,对含氧量的控制有高有低,例如对内燃机机体类铸件其铁水含氧量要求低于100毫升/100克[1]。 The phenomenon of oxidation occurred in the process of melting and pouring of hot metal affects the instinct, solidification nucleation and shrinkage characteristics of the hot metal filling mold to various degrees, which leads to the formation of casting defects. To ensure the quality of castings, the oxygen content in the molten iron should be controlled. Different casting requirements, different solidification characteristics, the control of oxygen content is high and low, for example, the internal combustion engine body castings its oxygen content of less than 100 ml / 100 g [1].