理化检验-物理分册2024，Vol.60Issue(2)：1-5,5.DOI:10.11973/lhjy-wl202402001
使用工况条件下核用18Ni(300)钢拉杆的力学性能
Mechanical properties of nuclear 18Ni(300)steel tie rod under service conditions
丁明 1胡卉桦 1刘攀 1郝宪朝 2马颖澈2
作者信息
- 1. 中核武汉核电运行技术股份有限公司, 武汉 430223
- 2. 中国科学院核用材料与安全评价重点实验室(中国科学院金属研究所), 沈阳 110016
- 折叠
摘要
Abstract
The microstructure,room temperature cyclic loading mechanical properties and fracture morphology of the tie rod made of 18Ni(300)steel after aging heat treatment were studied,and the fracture mode of the pull rod was analyzed.The results show that the 18Ni(300)steel after solution treatment exhibited quenched martensite structure,the original austenite grain size was about 24 μm,and the area fraction of retained austenite was about 0.26%.After aging treatment,the original austenite grain size was about 26 μm,and no retained austenite was observed.Martensite recovery of 18Ni(300)steel occurred,the(Ni,Co,Fe)3Ti phase was precipitated on the dislocation.Under the condition of simulated installation and use,the number of cyclic fracture cycles of the tie rod sample after cyclic loading at room temperature was greater than 480 times.It was found that the fracture site was mainly distributed at the root of the tie rod thread.The fracture was composed of plastic deformation zone and brittle deformation zone,and the plastic deformation zone was in the middle.The fracture section was mainly characterized by tensile fracture and supplemented by fatigue fracture.It was concluded that the pull rod was mainly subjected to axial tension.关键词
拉杆/18Ni(300)钢/力学性能/显微组织/塑性变形Key words
tie rod/18Ni(300)steel/mechanical property/microstructure/plastic deformation分类
矿业与冶金引用本文复制引用
丁明,胡卉桦,刘攀,郝宪朝,马颖澈..使用工况条件下核用18Ni(300)钢拉杆的力学性能[J].理化检验-物理分册,2024,60(2):1-5,5.
