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二、操作技术 1.焊前清理手工钨极氩弧焊与手工电弧焊、气焊等焊接方法的一个重要区别在于,它要求焊接前对工件的焊接部位及其周围20mm范围内以及焊丝表面必须严格进行除油除锈处理。这是因为氩气虽然能保护焊接部位不被大气氧化,但它本身不具备脱氧性能。工件及焊丝表面的油、锈如清除不彻底,焊接时在电弧高温作用下,油、锈分解所产生的气体将会使焊缝产生大量气孔和氧化物,严重影响焊接质量。对这一点必须
Second, the operation of technology 1. Clean-up before welding Manual TIG welding and manual arc welding, gas welding and other welding methods, an important difference is that it requires welding before the welding parts of the workpiece and the surrounding area of 20mm and the surface of the wire must be strict Degreasing rust treatment. This is because although argon can protect the welding part from being oxidized by the atmosphere, it does not have its own deoxidation performance. The surface of the workpiece and wire oil, rust, such as removal is not complete, the welding arc at high temperatures, the oil, rust gas generated by the decomposition of the weld will produce a large number of pores and oxides, seriously affecting the quality of welding. This must be done