电弧焊接中产生气孔的问题

• 作 者: 钱祖尼
• 出 处: 机械工人
• 发表日期: 1956年09期
• 关键词: 缝焊 氢气压力 焊接电流 熔渣 凝固温度 焊接规范 焊接速度 断裂面 健中 电弧热

当我们把一道焊缝焊完以后,除去了熔渣就能看到表面上有没有气孔。图1甲是有表面气孔的,而图2甲是没有表面气孔的。如果我们把焊缝剖开,就可以看到焊缝内部有没有气孔,从图1乙、丙和图2乙、丙中可以发现是有不同形状的气孔的。在焊缝中有气孔存在显然是不利的,它会减小焊缝的强度,使焊缝容易产生裂纹。因此我们说焊缝中的气孔问题必须解决。但是气孔这一问题很复杂,

When we finished welding a weld, we removed the clinker to see if there was any porosity on the surface. Figure 1 A is a surface porosity, and Figure 2 A is no surface porosity. If we cut the weld, we can see whether there are pores in the weld. From Figure 1, B and C and Figure 2, we can see that there are different shapes of pores. It is obviously unfavorable to have pores in the weld, which will reduce the strength of the weld and make the weld easy to crack. So we say that the problem of porosity in the weld must be solved. But the problem of stomata is very complicated,