Effect of Rare Earth Elements on Thermal Fatigue of High Ni-Cr Alloy Cast Iron

摘要

The effect of RE on crack forming and developing of hot rolled high Ni-Cr alloy cast iron during thermal fatigue test was investigated. It shows that the serviceable life of hot rolled high Ni-Cr alloy cast iron can be improved by RE. The number of cycle before fracture was increased by 42%～163% . The optimum of RE addition is 0.05 wt% ～0.15 wt%.