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首页> 外文会议>18th International IFHTSE congress >Comparison of the Laser and Electron Beam Welding of Steel Sheets Treated by Nitro-Oxidation
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Comparison of the Laser and Electron Beam Welding of Steel Sheets Treated by Nitro-Oxidation

机译：氮氧化处理钢板激光与电子束焊接的比较

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摘要

Nitro-oxidized steel specimens welded by a CO_2 laser and an electron beam were examined for quality and integrity by visual inspection, microstructure, and microhardness analysis. Visual inspection of the specimens welded by laser revealed the lack of root penetration at maximal welding speed from the selected welding speed range (30 to 60 mm/s) and a neat weld at the welding speed of 40 mm/s. However, in comparison to laser beam welding, the electron beam welding (EBW) process produced the weld joints with a wider heat affected zone, while the weld joints were much more prone to porosity. The microstructure of the weld joints made by both the laser beam welding and EBW methods did not show any abnormalities in phase composition owing to the presence of nitrides in the surface layer of the materials welded after nitro-oxidation.
机译：通过目测，显微组织和显微硬度分析检查了用CO_2激光和电子束焊接的氮氧化钢试样的质量和完整性。目视检查通过激光焊接的样品，发现在所选焊接速度范围（30至60 mm / s）的最大焊接速度下，根部熔深不足，而在焊接速度为40 mm / s的情况下，焊缝整齐。但是，与激光束焊接相比，电子束焊接（EBW）工艺产生的焊缝具有较大的热影响区，而焊缝更容易出现气孔。通过激光束焊接和EBW方法制造的焊接接头的微观结构，由于在氮氧化后焊接的材料的表面层中存在氮化物，因此在相组成上没有显示任何异常。

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