Development and Application of High Strength Ductile Pearlitic Nodular Cast Iron
Aiming at the development and application of high strength and toughness pearlitic ductile iron as cast,the microstruc-ture and properties of ductile iron after multiple alloying and secondary inoculation were analyzed by universal material testing machine and metallographic microscope.The results show that after adding Ni,Cu and Mo at the same time,the matrix structure of 95％pearlite,2 grade spheroidization and 6 grade size graphite can be obtained by secondary inoculation.Its tensile strength ≥ 854 MPa,yield strength ≥537 MPa,elongation ≥6％,which meets the mechanical properties requirements of high strength ductile iron.
high strength and toughnesspearlitealloyingQT800-5
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