Reviews of the Structure Steel’s Welding Matching
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摘要: 对结构钢焊接的高强匹配和低强匹配两种技术路线的发展进行了综述。在焊缝金属具有足够韧性的情况下,高强匹配能利用焊缝金属的高强度降低位于焊缝中裂纹的扩展驱动力、从而有利于焊接接头抗断性能的提高;随着结构钢强度的提高,焊接冷裂纹敏感性增大、焊缝韧性降低,采用焊接裂纹敏感性相对较低、焊缝金属塑韧性相对较高的低强匹配焊接技术能较好的控制焊接冷裂纹的产生并保证接头的抗断性能。Abstract: The investigations on the structure steel's welding matching were reviewed.The over-matching welding can improve the fracture resistance of the welded joints by lowing the cracking driving force when the crack locates in the weld metal and the toughness of the weld metal is enough.While the over-matching also lead two problems with the increase of the structure steel's strength.The welding cold cracking susceptibility is raised and the toughness of welded metal decreases.In terms of the welding of the high-strength steel,the under-matching welding with lower welding cold cracking susceptibility and higher toughness is better than the over-matching welding to control the emergence of cold cracking and ensure the fracture resistance of welding joints.
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Keywords:
- Over-matching /
- Under-matching /
- Fracture resistance /
- Welding cold cracking
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