Analysis and Application of Spheroidization Treatment of Nodular Iron Roll
The spheroidization treatment and inoculation treatment of nodular cast iron were introduced.The factors influencing the effect of spheroidization were analyzed from the aspects of raw material quality,process operation,iron liquid tank shape and tapping temperature.The corresponding prevention measures were given:(1)The high amount of w(S) in raw iron liquid lead to nodular addition increasing.That was not conducive to the stability of the molten iron quality.(2)The high amount of w(RE) lead to produce graphite block at large cross-section in casting.(3)According to the size of castings,proper control of spheroidizing temperature and pouring temperature were conducive to avoid the occurrence of spheroidization and inoculation fade.(4)The use of compound inoculants,multiple inoculants and metal-stream inoculation were beneficial to increase the graphite core,improve the spheroidization,increase the number of graphite and improve the comprehensive performance of nodular iron castings.
NETL
NSTL
万方数据
维普
