摘要
利用真空自耗电弧熔炼(VAR)制备了一种Zr、Hf质量比为1∶1的新型ZrHf合金,研究了该合金的显微组织、力学性能及其在沸腾硝酸溶液中的耐蚀性能。结果表明,该合金由密排六方结构相构成,其晶格常数介于α-Zr与α-Hf之间;在固溶强化机制下,该合金具有较高的室温屈服强度、抗拉强度和延伸率,分别达到641 MPa、714 MPa和51%。该ZrHf合金在6 mol/L的沸腾硝酸溶液中腐蚀192 h后,腐蚀速率低于0.002 mm/a,具有高强度、耐腐蚀的优异性能。
The novel ZrHf alloy with mass ratio of 1∶1 was prepared by vacuum arc remelting(VAR),and the microstructure,mechanical properties and corrosion resistance in boiling nitric acid of the alloy were studied.The results show that the alloy is composed of close-packed hexagonal phase,and its lattice constant is betweenα-Zr andα-Hf.Due to the solid solution strengthening mechanism,the room temperature yield strength of the alloy reaches 641 MPa,tensile strength reaches 714 MPa,and the elongation reaches 51%.The corrosion rate of the novel ZrHf alloy after 192 h corrosion in 6 mol/L boiling nitric acid solution is lower than 0.002 mm/a,showing excellent comprehensive properties of high strength and corrosion resistance.
作者
刘忠亮
常青
吴金平
刘承泽
杨帆
徐磊
Liu Zhongliang;Chang Qing;Wu Jinping;Liu Chengze;Yang Fan;Xu Lei(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China;Xi’an Rare Metal Materials Institute Co.,Ltd.,Xi’an 710016,China)
出处
《钛工业进展》
CAS
2022年第3期29-32,共4页
Titanium Industry Progress
基金
陕西省自然科学基础研究计划(2021JQ-976)
陕西省科技统筹创新工程计划(2016KTCQ01-103)
陕西省技术创新引导计划(2020CGXNX-023)。
关键词
ZrHf合金
力学性能
腐蚀速率
固溶强化
ZrHf alloy
mechanical properties
corrosion rate
solid-solution strengthening
