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第一汽车厂是压力容器开罐检验修理中的自检单位。在检修工作中,我们对气孔的产生与防止,有进一步的认识,现将几点看法简述如下: 一、产生气孔的原因: 1.如果焊件或焊条上有油、漆、锈、水等未清除干净。 2.焊条未烘干或烘干温度不够,保温时间不足。 3.如果霜、露、雾很大,烘干后的焊条吸潮较严重。 4.焊缝清理宽度<50mm,焊接电弧的高温使焊缝周围的油、水、锈等脏物产生水蒸气,侵入熔池,引起氢气孔。
The first automobile factory is a self-inspection unit in pressure vessel canning inspection and repair. In the maintenance work, we have a further understanding of the production and prevention of stomatal problems, and now a few observations are as follows: First, the reasons for the generation of stomatal problems: 1. If the weldment or welding rod with oil, paint, rust, water Not clean and so on. 2 electrode is not drying or drying temperature is not enough, holding time is not enough. 3. If the cream, dew, fog large, dry electrode more serious moisture absorption. 4. Weld cleaning width <50mm, the high temperature of welding arc around the weld oil, water, rust and other dirt generated steam, invade the pool, causing hydrogen holes.