Matrix microstructure effect on the abrasion wear resistance of high-chromium white cast iron

The two-body abrasion resistance of high-Cr white cast iron was investigated as a function of cast iron microstructure. Different microstructures were obtained by means of heat treatment. The Cr and carbon content were chosen to have different matrix microstructures (austenitic, martensitic and ferritic) with the same amount of eutectic carbide (M sub 7 C sub 3 ). The results show that the cast iron with an austenitic matrix has the best wear resistance. The good wear resistance of this material is due to strong work hardening of the austenitic matrix resulting in a hardness which exceeds that of other structures. The effect of abrasive paper deterioration on abrasion has also been investigated. Graphs, photomicrographs. 20 ref.--AA