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一、熔剂层下自动堆焊的工艺特点 熔剂层下自动堆焊的原理(参看图1)是利用連續送入电弧燃烧区域的顆粒状的熔剂,被熔化形成一个弹性的壳腔,保护熔化了的金属免受空气的氧化和氮化。 与手工电弧堆焊比較,熔剂层下自动堆焊具有許多优点,如:节省电能,金属損失少,生产率比手工堆焊高10～50倍以上,堆焊层的硬度和化学成份易于控制,堆焊层表面平整毋須机械加工等。 影响堆焊层金属性能和焊道成形的因素是很多的,主要是:焊絲进給速度,堆焊速度,焊絲外伸
First, the flux layer under the automatic welding process characteristics Under the flux layer automatic welding principle (see Figure 1) is the use of continuous feeding into the arc combustion area granular flux, is melted to form a flexible shell cavity, the protection of the melting The metal is protected from air oxidation and nitriding. Compared with manual arc welding, automatic welding under flux layer has many advantages, such as: save energy, less metal loss, productivity 10 to 50 times higher than the manual surfacing, surfacing layer hardness and chemical composition easy to control, pile Welding layer surface without the need for machining and so on. There are many factors that affect the performance of the weld overlay and the weld bead formation, mainly: wire feed speed, build-up speed, wire extension