The choicing of a high efficiency inoculant

Firstly the effect of seven inoculants is evaluated by experiments to select better ones. Then, the influence of quantities of three inoculants with good effect is studied to determine the favorite one. The results show that inoculants with more elements which are helpful to inoculation have better effect than the others with less and there is a optimal range of adding quantity for them in inoculation. Inoculated with inoculant Ⅵ which is the best of the seven inoculants, a gray iron with low chilling potential,low sensitivity to the thickness of castings' walls and tensile strength over 250 MPa can be produced.