Title:
METHOD FOR CONTROLLING STRUCTURE IN SPHEROIDAL GRAPHITE CAST IRON AND MOLD USED FOR THIS CONTROL METHOD
Document Type and Number:
Japanese Patent JP2003053516
Kind Code:
A
Abstract:
To provide a method for controlling structure in a spheroidal graphite cast iron with which the structure having a large number of graphite grains and large ferrite ratio on the surface layer part and a comparatively small number of the graphite grains and large pearlite ratio in the inner part, is formed, and a mold used for this control method.
In the mold 1 provided with a sand mold 9 having a cavity 5 formed as a cast product shape, sprues 13, 3, 15 for supplying molten metal into the above cavity 5, and a separated molten metal path 7 for adjusting cooling speed in a slow cooling part 11 for cavity 5, the separated molten metal path 7 for adjusting cooling speed is arranged near the slow-cooling part 11 through the sand mold 9.
Inventors:
Yotsuya, Yoshitaka
Application Number:
JP2001000240087
Publication Date:
February 26, 2003
Filing Date:
August 08, 2001
Export Citation:
Assignee:
SUZUKI MOTOR CORP
International Classes:
B22D15/00; B22C9/00; B22C9/08; B22C9/22; B22D27/04; B22D27/20; C21C1/10; B22D15/00; B22C9/00; B22C9/22; B22D27/00; B22D27/04; C21C1/00; (IPC1-7): B22D27/20; B22C9/00; B22C9/08; B22C9/22; B22D15/00; B22D27/04; C21C1/10