采用粉末冶金法制备了不同钽添加量的氧化物弥散强化低活化铁素体马氏体钢,研究了钽添加量对该钢组织与力学性能的影响.结果表明:该钢的力学性能随着钽添加量的增多先升高后下降;当钽的添加量为0.18%时,晶粒细小均匀,在晶粒内有大量二次细小的TaC粒子弥散均匀析出,合金的力学性能最优,室温抗拉强度和伸长率分别为632 MPa和24.2%,300℃下的抗拉强度和伸长率分别为557 MPa和23.1%.
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