Y2O3颗粒弥散强化低活化钢的组织稳定性研究
STUDY ON MICROSTRUCTURE STABILITY OF AY2O3 DISPERSION STRENGTHENED LOW-ACTIVATION STEEL
摘要
采用机械合金化方法制备添加0.3%Y2O3的CLAM钢混合粉末, 利用热等静压技术固化成型, 制备出致密度高达98.7%的ODS-CLAM钢. 利用二次电子成像、电子探针、XRD技术研究球磨后CLAM钢合金粉末形貌、合金元素分布、晶格畸变, 确定ODS-CLAM钢混合粉末的最佳球磨工艺为: 球磨时间50 h, 球料比10∶1, 球磨介质直径6 mm的硬质钢球, 球磨气氛Ar. 依据此工艺制备出的ODS-CLAM钢的高温组织稳定性较好, 在1200 ℃固溶60 min 后, 其晶粒尺寸并未明显长大,板条细小, 且Y2O3颗粒仍稳定存在于基体中.
Abstract
Oxide dispersion strengthened (ODS) steels are being developed as a promising structural material for next-generation nuclear energy systems, due to its excellent resistance to both irradiation damage and high-temperature creep. In this work, the mechanical alloying (MA) and hot isostatic pressing (HIP) technologies were used to prepare a ODS low-activation steel, based on the China low activation martensitic (CLAM) steel. SEM, XRD analysis and EPMA were used to examine the particle size, alloying element distribution and lattice distortion of the ball-milled powders. In order to obtain uniform powders, CLAM powders with 0.3%Y2O3 particles should be milled with hard steel balls of 6 mm in diameter for 50 h in Ar protective atmosphere, and the ball- to- powder weight ratio at 101. The microstructure of well-prepared ODS-CLAM steel was stable till 1200 for 1 h, with grain size of 50~60 mm and martensitic lath width of 200 nm, meanwhile, the Y2O3 particles could still be found in the steel matrix.关键词
氧化物弥散强化钢/显微组织/组织稳定性/Y2O3引用本文复制引用
胡雪,严伟,王威,黄礼新,单以银,杨柯.Y2O3颗粒弥散强化低活化钢的组织稳定性研究[EB/OL].(2023-03-19)[2026-04-01].https://chinaxiv.org/abs/202303.00622.学科分类
钢铁冶炼/冶金技术/金属学、热处理
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