Method for manufacturing a cast iron part and cast iron part thus obtained

The present invention describes a method for manufacturing a spheroidal pearlitic cast iron part which comprises: preparing an alloy with the following chemical composition (percentages expressed by weight with respect to the total weight of the alloy) C = 3.60-3.70%; Si = 2.20-2.30%; Mn = 0.40-0.60%; P = 0.02-0.04%; S = 0.005-0.008%; Cu = 0.90-1.00%; Mg = 0.03-0.04%; N = 0.005-0.008%; the rest of the chemical composition being Fe and other residual elements; casting the alloy in a sand mold and inoculating an inoculant material in a casting vein with a determined addition flow rate, a determined granulometry, and in an amount comprised between 0.20-0.25% by weight with respect to the amount of the iron cast, wherein said inoculant material has the chemical composition Si = 75.1%; Al = 0.89%; Ca = 0.93%; S = 0.11% and Ce = 0.70%; or Si = 73.1%; Al = 0.71%; Ca = 1.75%; S = 0.06% and Bi = 0.88%., the rest being Fe. The invention also relates to the cast iron part obtained by means of said method.