STRUCTURE EVALUATION METHOD OF DUCTILE CAST IRON

摘要

PROBLEM TO BE SOLVED: To provide a structure evaluation method of ductile cast iron not requiring much labor for inspection, capable of concrete correlation between a metallic structure in which graphite particles are dispersed and breakage.SOLUTION: The concrete correlation between the metallic structure in which graphite particles are dispersed and breakage is obtained by using an inspection surface as a breakage surface 1a of a tensile test piece 1 in a tensile test, and much labor is not required for inspection by dispensing with polishing of the inspection surface or the like.