高强低合金钢成形极限曲线的计算
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摘要
对6种不同性能的高强低合金钢进行了拉伸性能和成形极限曲线(FLC)的测试,分析了影响材料成形极限曲线应变水平的主要因素。结果表明:材料厚度和伸长率与其FLC0具有很强的相关性。提出了基于拉伸性能参数的FLC经验计算公式,该方法比常用的计算方法具有更高的准确性,为低合金汽车板FLC的快速计算提供了一种新的途径。
The mechanical properties and the forming limit curves(FLC)of six different high-strength low alloy steel materials were measured,as well as the key influencing factors to the strain level of FLC were analyzed.It showed that the FLC0 is profoundly related to the thickness and elongation of the materials.Based on the tensile test properties,the empirical formulas for calculating FLC were brought out,which showed better accuracy than the conventional method for quick calculation of the FLC of low alloy sheet metals.
The mechanical properties and the forming limit curves(FLC)of six different high-strength low alloy steel materials were measured,as well as the key influencing factors to the strain level of FLC were analyzed.It showed that the FLC0 is profoundly related to the thickness and elongation of the materials.Based on the tensile test properties,the empirical formulas for calculating FLC were brought out,which showed better accuracy than the conventional method for quick calculation of the FLC of low alloy sheet metals.
引文
[1]ZDZISLAW MARCINIAK,KAZIMIERZ KUCZYNSKI.Limit strains in the processes of stretch-forming sheet metal[J].Int.J.Mech.Sci.1967(9):609-620.
[2]刘长丽,周贤宾,陈劼实.板材拉伸破裂厚度分布及成形极限预测[J].锻压技术,2006(5):147-150.
[3]陈炜,冯华云,杨继昌.厚度梯度准则在成形极限图建立中的应用[J].江苏大学学报,2008,29(1):13-16.
[4]祝洪川,李荣锋,杜丽影.FLC测量中的影响因素研究[J].物理测试,2008,26(5):17-20.
[5]中国国家标准化管理委员会.GB/T 24171.2-2009/ISO12004-2:2008金属材料薄板和薄带成形极限曲线的测定第2部分:实验室成形极限曲线的测定[S].北京:中国标准出版社,2009.
[6]祝洪川,李荣锋.成形极限曲线测定国家标准GB/T 24171-2009简介及应用建议[J].物理测试,2010,28(6):42-46.
[7]方刚,马明图,Dongun Kim.三种强度级别的双相钢成形性能研究[J].中国工程科学,2014,16(1):66-70.
[2]刘长丽,周贤宾,陈劼实.板材拉伸破裂厚度分布及成形极限预测[J].锻压技术,2006(5):147-150.
[3]陈炜,冯华云,杨继昌.厚度梯度准则在成形极限图建立中的应用[J].江苏大学学报,2008,29(1):13-16.
[4]祝洪川,李荣锋,杜丽影.FLC测量中的影响因素研究[J].物理测试,2008,26(5):17-20.
[5]中国国家标准化管理委员会.GB/T 24171.2-2009/ISO12004-2:2008金属材料薄板和薄带成形极限曲线的测定第2部分:实验室成形极限曲线的测定[S].北京:中国标准出版社,2009.
[6]祝洪川,李荣锋.成形极限曲线测定国家标准GB/T 24171-2009简介及应用建议[J].物理测试,2010,28(6):42-46.
[7]方刚,马明图,Dongun Kim.三种强度级别的双相钢成形性能研究[J].中国工程科学,2014,16(1):66-70.