提高电子束焊缝质量的稳定性

• 作 者: 张克华
• 出 处: 航天工艺
• 发表日期: 1987年05期
• 关键词: 电子束焊 焊缝质量 焊缝成形 聚焦电流 焊缝形状 会聚角 圆扫描 工作距离 成形条件 扫描系统

电子束焊缝的形状和很多因素有关,为了保持焊缝成形的稳定性,必须保证电子束会聚角数值的恒定,以及焦点在焊缝金属内的深度。国外文献指出,聚焦电流的大小在很大程度上可影响焊缝的成形。与最佳值相比,聚焦电流增加或者减少1％将导致焊缝形状的显著变化,并且在焊缝内将小现缺陷。国外资料报道了在保持焊缝形状再现,以及焊缝质量良好的情况下,扩大聚焦电流和束流茫围的可能性。

The shape of the electron beam weld depends on many factors. In order to maintain the stability of the weld formation, it is necessary to ensure the constant value of the convergence angle of the electron beam and the depth of focus in the weld metal. Foreign literature pointed out that the size of the focus current can largely affect the formation of the weld. Increasing or decreasing the focusing current by 1% compared to the optimum results in a significant change in the shape of the weld and a small defect in the weld. Foreign data reported in the shape of the weld to keep reproduction, and the quality of the weld is good, to expand the focus current and beam coverage of the possibility.