Modelling distortion reduction on pre- and post-weld rolled gas metal arc weldedplates
Modelling distortion reduction on pre- and post-weld rolled gas metal arc weldedplates
复制标题
对焊前和焊后轧制熔化极气体保护焊板的变形减少进行建模
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Wen
中科院分区：
文献类型：
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作者：
L. D. Cozzolino;H. Coules;P. Colegrove;S. Wen
焊接过程中产生的残余应力会导致变形，特别是当施加在相对较薄的板上时。有一些标准的和有充分文件的技术来减少焊接后的变形和残余应力，然而，这些技术在工业规模上实施通常是昂贵和耗时的。在本文中，我们展示了减少焊接变形的焊前和焊后轧制技术。预焊轧制（PWR）可以在制造前应用，可能由钢铁制造商。一项实验研究表明，使用该技术平均可以减少38%的失真。采用有限元分析（FEA）来确定应力分布以了解这一现象。分析了许多条件，包括在距离随后焊接材料的边缘不同距离的顶部（焊头侧，图1）和底部（焊根侧）表面进行轧制。实验结果和数值计算结果均表明，底部轧制在减小变形方面效果较好。此外，可能的机制是由于轧制引起的应力的增加抵消了焊接引起的应力。一些初步的焊后轧制试验结果表明，这是一种更有效的减少变形的方法，可以生产出几乎平整的板材。这一重大发现有可能消除焊接结构中的变形，其中可以应用轧制。
Residual stress generated during welding can cause distortion, especially when applied on relatively thin plates. There are several standard and well documented techniques to reduce distortion and residual stress after welding, however these techniques are often costly and time consuming to implement on an industrial scale. In this paper we demonstrate the preand post-weld rolling techniques for reducing weld distortion. PreWeld Rolling (PWR) can be applied before fabrication, potentially by the steel manufacturer. An experimental investigation indicated that there was an average 38% reduction of distortion with this technique. Finite element analysis (FEA) was used to determine the stress distribution to understand the phenomenon. A number of conditions were analysed, including rolling on the top (weld bead side, Figure 1) and bottom (weld root side) surfaces at different distances from the edge where the material was subsequently welded. Both experimental and numerical results have shown that rolling on the bottom side gives better results in terms of distortion reduction. In addition the likely mechanism is the addition of stresses due to rolling which counteract those induced by welding. Some preliminary experimental results on post-weld rolling show that this is a more effective method for reducing distortion, producing virtually flat plates. This significant finding has the potential to eliminate distortion in welded structures where rolling can be applied.
焊前轧制对熔焊钢板变形和残余应力的影响
DOI：
10.4028/www.scientific.net/msf.681.486
发表时间：
2011
期刊：
Materials Science Forum
影响因子：
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作者：
Coules H
通讯作者：
Coules H