研制了一种具有低肿胀高强度的氧化物弥散强化（ＯＤＳ）型铁素体钢Ｆｅ－Ｃｒ－Ｗ－Ｔｉ－Ｙ_２Ｏ_３，并对其抗辐照损伤行为进行了系统研究。电子辐照结果表明，Ｙ_２Ｏ_３弥散氧化物质点在所研究的辐照条件下是稳定的，在辐照过程中形成ｂ＝ａ〈１００〉和ｂ＝ａ／２〈１１１〉两种类型的位错环。在６７３Ｋ，当辐照剂量从５增至１７．５ｄｐａ时，空洞肿胀由０．１％增至０．３５％。在辐照区内没有明显的溶质原子（如Ｃｒ，Ｗ和Ｔｉ）在晶界偏析。 A kind of oxide-strengthened (ODS) -type ferritic steel Fe-Cr-W-Ti-Y_2O_3 with low swelling and high strength was developed and its anti-radiation damage behavior was systematically investigated. The result of electron irradiation showed that Y_2O_3 diffusive oxide particles were stable under the irradiation conditions studied, and two types of dislocations b = a <100> and b = a / 2 <111> were formed during irradiation ring. At 673K, void swelling increased from 0.1% to 0.35% at a radiation dose of 5 to 17.5 dpa. No obvious solute atoms (such as Cr, W and Ti) segregate at the grain boundaries in the irradiated zone.