| 引用本文: | 徐善华,古仁俊,聂彪,徐吉民.锈蚀冷弯薄壁型钢板材力学性能退化规律[J].哈尔滨工业大学学报,2021,53(4):177.DOI:10.11918/202004102 |
| XU Shanhua,GU Renjun,NIE Biao,XU Jimin.Research on degradation law of mechanical properties of corroded cold-formed thin-wall steel plate[J].Journal of Harbin Institute of Technology,2021,53(4):177.DOI:10.11918/202004102 |
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| 摘要: |
| 为了研究锈蚀对冷弯薄壁型钢和热轧钢材料力学性能的不同影响,通过对工业环境下服役多年的冷弯薄壁 C 型钢进行拉伸试验,借助3Dscan手持式激光扫描仪得到腐蚀钢板表面形貌,探讨了锈蚀程度对其材料力学性能的影响。将试验结果与锈蚀热轧钢进行对比分析,比较了锈蚀对两种钢材表面形貌、断口形式、应力-应变曲线、力学性能指标的不同影响。研究结果表明:锈蚀冷弯薄壁型钢三维粗糙度参数Sa、Sq随锈蚀率的增大而呈现逐渐增大趋势,且增长速率高于热轧钢；锈蚀冷弯薄壁型钢的弹性模量、屈服强度、极限强度和极限应变均随着锈蚀率的增大呈线性下降,但伸长率随锈蚀率的增大呈二次曲线下降；同等锈损深度下,冷弯薄壁型钢的弹性模量、屈服强度、极限强度、极限应变和伸长率的下降速率均大于热轧钢,证明了锈蚀对冷弯薄壁型钢力学性能的影响高于热轧钢。 |
| 关键词: 锈蚀 冷弯薄壁型钢 热轧钢 对比 表面形貌 |
| DOI：10.11918/202004102 |
| 分类号:TU511 |
| 文献标识码:A |
| 基金项目:国家十三五重点研发计划 (2016YFC0701305);国家自然科学基金(51378417) |
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| Research on degradation law of mechanical properties of corroded cold-formed thin-wall steel plate |
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XU Shanhua1,GU Renjun1,NIE Biao1,XU Jimin2
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(1.School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China; 2.Central Research Institute of Building and Construction Co. Ltd., MCC Group, Beijing 100088, China)
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| Abstract: |
| To study the effects of corrosion on the mechanical properties of cold-formed thin-walled steel and hot-rolled steel materials, tensile tests were conducted on cold-formed thin-walled C-shaped steel that has been in service for many years in industrial environments. By using a 3D scan handheld laser scanner, the surface morphology of the corroded steel plate was obtained, and the influence of the degree of rust on its mechanical properties was discussed. Test results were compared with corroded hot-rolled steel to analyze effects of corrosion on the surface morphology, fracture form, stress-strain curve, and mechanical properties of the two steel products. Results show that the 3D roughness parameters Sa and Sq of the corroded cold-formed thin-walled steel gradually increased with the increase of the corrosion rate, and the growth rate was higher than that of the hot-rolled steel. The elastic modulus, yield strength, ultimate strength, and ultimate strain of the corroded cold-formed thin-walled steel decreased linearly with the increase of the corrosion rate, but the elongation decreased by a quadratic curve with the increase of corrosion rate. At the same depth of rust damage, the decrease rates of elastic modulus, yield strength, ultimate strength, ultimate strain, and elongation of the cold-formed thin-walled steel were greater than those of the hot-rolled steel, which proves that the influence of corrosion on the mechanical properties of cold-formed thin-walled steel is greater than that on hot-rolled steel. |
| Key words: corrosion cold-formed thin-walled steel hot-rolled steel comparison surface morphology |
