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手弧焊时,由于焊条熔滴和熔池金属均处于电弧的高温作用下,金属和药皮的组成物都会发生强烈的氧化、气化、蒸发和扩散,使电弧区形成了一股不断向周围扩散和对流的气溶胶(也就是焊接时产生的气体和处于浮游状态的固体粒子的组成物)。气溶胶中的可见部分就是焊接烟尘。手弧焊时,由于焊工距烟尘的发生源很近,所以在焊工的呼吸带往往充满着有害的焊接烟尘,使焊工有头痛、头晕、喉痛、午夜后发热、怕冷和焊工尘肺等症状。手弧焊的烟尘主要是由焊条药皮、焊芯和焊件产生的,但95％以上的烟尘是由药皮的组
In hand arc welding, the composition of the metal and the coating undergoes intense oxidation, gasification, evaporation and diffusion due to the droplet of the welding rod and the metal of the molten pool being under the action of electric arc. As a result, an arc of continuous Around the proliferation and convection of aerosols (that is, the gas generated during welding and the composition of solid particles in a floating state). The visible part of the aerosol is welding fumes. In hand arc welding, the welder’s breathing zone is often full of harmful welding fumes, causing the welder to have headache, dizziness, sore throat, fever after midnight, cold and the welder’s pneumoconiosis and other symptoms because the welder is very close to the source of the soot. . Hand arc welding soot is mainly produced by the electrode coating, welding core and weldment, but more than 95% of the smoke is composed of the coating of the skin