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建筑用热轧奥氏体304不锈钢管力学性能.pdf

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第46卷  第2期 哈  尔  滨  工  业  大  学  学  报 Vol??46 No??2 20 14年2月 JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY Feb. 2014 建筑用热轧奥氏体304不锈钢管力学性能 邢佶慧,史一剑,吴  超,杨庆山 (北京交通大学 土木建筑工程学院,100044 北京) × 摘  要:为了解热轧无缝不锈钢管材料性能,分别对取材自奥氏体304 Φ216 16mm热轧不锈钢管的光滑和缺口圆棒试 - 件进行单调和循环加载两类试验,获取了应力 应变关系及基本材料参数,得到滞回和骨架曲线,标定钢材循环强化参 数,并观察了断面微观破坏特征.研究表明:国产热轧不锈钢管加工工艺对中厚管材性影响不大;奥氏体304 不锈钢在循 - 环荷载作用下具有良好强化效应和耗能性能;宜采用随动 等向混合强化材料模型描述其行为,所标定循环强化参数可 用于复杂应力状态下的数值模拟;不锈钢材微观破坏特征异于普通低合金或低碳钢. 关键词:热轧钢管;单向拉伸;循环荷载;材料参数;微观破坏特征 - - - 中图分类号:TU391 文献标志码:A 文章编号:0367 6234(2014)02 0078 07 Mechanics properties of hot?rolled seamless Austenitic304 stainless steel pipe XINGJihui,SHI Yijian,WU Chao,YANG Qingshan (School of Civil Engineering,BeijingJiaotong University,100044 Beijing,China) Abstract:To study the material behaviors of hot?rolled circle hollow austenitic 304 stainless steel members × applied widely in large?span roofs,both smooth and notched round specimens were cut from Φ216 16 mm tubes and tested under monotonic tensile and cyclic axial loadings. Stress?strain curves were obtained to determine basic material parameters aswell as load?displacement hysteretic responses and skeleton curves. In addition,fracture micromorphology of the specimens was observed. It is shown that the properties of middle thick austenitic 304 stainless steel are not significantly influenced by hot?rolled forming process. The stainless steel e
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