Ductile cast iron material, composition containing same and production method of bearing saddle and ductile cast iron

[0056] Melting: put the nodular cast iron material in a 500kg medium-frequency induction melting furnace for melting to obtain molten iron, and control the furnace temperature to 1480°C.

[0057] Spheroidization and inoculation: Use bottom bag spheroidization, put 8kg nodulizer on the bottom of the bag, put 6kg inoculant on top, and then cover with a layer of K-34# slag collector produced by Qingdao Fusaike Casting Materials Co., Ltd. 1kg,. After the spheroidization treatment is completed, the slag is removed and the second inoculation is carried out. Wherein the secondary inoculation adding inoculant is 1kg, and the molten iron after inoculation is obtained;

[0058] Casting: The temperature of the inoculated molten iron is lowered to 1400°C before casting, and the Y-type test bar casting mold is prepared with coated sand. Before pouring, the Kiel test bar sand mold is dried and the floating sand in the sand mold is purged.

[0059] Shakeout:

[0060] Shakeout time 1.5 hours

[0062] The technical process is the same as in Example 1, and the specific parameters are shown in Table 6.

[0063] Table 6

[0064]