Inoculant for ferritic nodular cast iron and preparation method of inoculant
A nodular cast iron and inoculant technology, which is applied in the field of ferritic nodular cast iron inoculants and its preparation, can solve the problems of scrapped castings and unstable inoculation effects, and achieve low usage and good inoculation effects
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[0021] A method for preparing an inoculant for ferritic nodular cast iron. According to the chemical composition and mass percentage of the above-mentioned inoculant for ferritic nodular cast iron, corresponding raw materials are prepared for deployment, and then the prepared raw materials are put into a crucible to melt and refine , and finally pouring, cooling, and crushing and granulation.
[0022] A method for using an inoculant for ferritic nodular cast iron, using two inoculation treatments: one inoculation at the bottom of the bag to cover the surface of the nodulizer with the inoculant, the addition of the above-mentioned inoculant for ferritic nodular cast iron is 0.10- 0.15wt%; the top is covered with a steel plate; the secondary inoculation adopts flow inoculation, and the above-mentioned inoculant for ferritic ductile iron is added in an amount of 0.80-0.85wt%.
Embodiment 1
[0023] Example 1 Formula: The mass percent of the inoculant for ferritic ductile iron is: Si: 65%, Bi: 5.0%, Ca: 4.0%, Ba: 2.9%, Al<0.5%, Ti<0.05%, Mn <0.4%, S<0.02%, P<0.05%, the balance is iron.
Embodiment 2
[0024] Example 2 Formula: The mass percentage of the inoculant for ferritic ductile iron is: Si: 70%, Bi: 4.0%, Ca: 2.0%, Ba: 1.0%, Al<0.5%, Ti<0.05%, Mn< 0.4%, S<0.02%, P<0.05%, the balance is iron.
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