Thick Plate CO2-Laser Based Hybrid Welding of Structural Steels
Thick Plate CO2-Laser Based Hybrid Welding of Structural Steels
复制标题
厚板结构钢 CO2 激光复合焊接
DOI：
10.1007/bf03266691
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发表时间：
2009
影响因子：
2.1
通讯作者：
J. K. Kristensen
中科院分区：
文献类型：
--
作者：
J. K. Kristensen
经过二十年的深入研究，激光和混合激光电弧焊接现已成为结构钢和其他材料焊接领域的成熟工艺。多年来已经报道了许多结果，并且与传统焊接工艺相比已经获得了许多优点。然而，在结构钢中使用穿透深度超过约12 mm的非常厚的部件激光焊接仍然是一个严峻的挑战。这部分是由于可实现的焊接深度的限制，因为作为激光功率的函数的熔深显示出非常非线性的行为，并且部分是由于必须控制的大的熔融体积。虽然光纤激光器和圆盘激光器正在向高功率发展，但CO2激光器仍然主导着较大的熔透焊接。本文研究了厚板结构钢CO2激光/MAG复合焊接的潜力和局限性。超过12 mm厚的结构钢焊缝与所获得的机械性能一起呈现，例如硬度、韧性和疲劳。使用S235、S355和S690 QL级结构钢进行了研究。
Laser and hybrid laser-arc welding are after two decades of intensive work now well-established processes in the welding of structural steels as well as other materials. Many results have been reported over the years and many advantages in comparison with traditional welding processes have been obtained. Very thick part laser welding using penetration depth in excess of approximately 12 mm in structural steel does however continue to be a serious challenge. This is partly due to limitations in the achievable welding depth because the penetration as a function of laser power shows a very non-linear behaviour, and partly to the large molten volume that must be controlled. Although fibre- and disc-lasers today are being developed to high powers, CO2-lasers sources are still dominating larger penetration welding. In the present investigation the potential and limitations of hybrid CO2-laser/MAG welding of thick plate structural steels have been investigated. Welds in excess of 12 mm thickness of structural steels are presented together with achieved mechanical properties as e.g. hardness, toughness and fatigue. The investigations were made using structural steels of the grades S235, S355 and S690QL.