上海交通大学学报

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (05): 605-609.

• 金属学与金属工艺 • 上一篇    下一篇

QSTE700型冷弯高强度钢方管的冷作硬化效应

晁灿1，赵亦希1，康稳1，晏培杰2，马跃峰2
  

  1. （1.上海交通大学 上海市复杂薄板结构数字化制造重点实验室， 上海 200240； 2.上海宝钢型钢有限公司， 上海 201107）
  • 收稿日期:2013-09-05
  • 基金资助:

    国家自然科学基金（51075267，51375308）资助项目

Strain Hardening Effect of QSTE700 Cold-Formed High Strength Steel Square Tube

CHAO Can1,ZHAO Yixi1,KANG Wen1,YAN Peijie2,MA Yuefeng2
  

  1. （1.Shanghai Key Laboratory of Digital Manufacture for ThinWalled Structures, Shanghai Jiaotong University, Shanghai 200240, China； 2.Shanghai Baosteel Section Steel Co. Ltd., Shanghai 201107， China）
  • Received:2013-09-05

摘要：

针对直接成方冷弯QSTE700型高强度钢方管的直边和角部进行单向拉伸试验，分析了其不同部位的力学性能，并将试验结果与普碳钢方管进行对比.结果表明：成形后，高强度钢方管直边部分的屈服强度和抗拉强度的增幅不大，焊缝区域的屈服强度提高了约10%；方管角部的屈服强度平均增幅为17.78%，明显低于普碳钢方管角部屈服强度的增幅，角部屈服强度的提高与实际的成形圆角有关.同时，将方管分为直边区和角部区，分别赋予材料真实力学性能参数进行有限元模拟，所得结果比均匀化材质更接近于真实情况.

 
 

关键词: 高强度钢, 方管, 冷弯成形, 单向拉伸试验, 冷作硬化

Abstract:

Serial tensile tests were conducted to investigate the mechanical properties of different parts for QSTE700 square tube. It shows that the strength is improved by 10% at welded portion while the strength of flat portion remained unchanged. The strength of corner portion is 17.78% higher than that of the original steel but still lower than that of the traditional carbon steel square tube. The real fillet plays an important role in yield strength improvement. The square tube in the FE model was divided into two parts with different material properties based the test data. The simulation result indicates that the model with different material properties is much closer to the real situation.
 

Key words: high strength steel, square tube, roll forming, tensile test, strain hardening

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