本文研究了耐热铸铁的金相组织与高温性能的关系.试验表明:当石墨由球状变为蠕虫状时,其抗氧化抗生长性能减弱,但变化不太大,当珠光体含量增多时,抗氧化性能变化不大,生长率明显增加.在一定范围内,改变石墨形状及珠光体含量,高温短时抗拉强度变化不大. In this paper, the relationship between the microstructure and heat resistance of heat-resistant cast iron was studied.The results showed that when graphite changed from spherical to worm-like, its anti-oxidation anti-growth performance weakened, but the change was not too big. When the content of pearlite increased, There was little change in the oxidation resistance and the growth rate obviously increased.With the change of graphite shape and pearlite content within a certain range, the tensile strength did not change much at high temperature and short time.