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自保护药芯焊丝在20世纪50年代末最早出现于美国和前苏联,在随后40余年的时间里,自保护药芯焊丝以其特有的优越性得到了很大的发展,尤其在高层建筑、输油管道和海洋石油平台等领域得到广泛应用。其主要特点是无需任何气体保护,可在四级风力下施焊,野外施焊的灵活性和抗风能力明显优于 CO_2焊,可直接使用电源(专用电焊机)进行焊接,同时还具有焊把轻便(不带气管),对坡口装配精度要求不高等优点,具有使用方便,效率高等特点,并能实现半自动焊。因此在国外的建筑、机械、造船、桥梁、输油、输气、输水管道、油罐、高炉和热风炉等领域中得到了广泛应用。另外,随着我国经济的发展,高层建筑钢结构的不
Self-shielded flux cored wire first appeared in the United States and the former Soviet Union in the late 1950s. Over the next 40 years, self-shielded flux-cored wires have made great strides in their unique advantages, especially in high-rise buildings, Oil pipelines and offshore oil platforms and other fields have been widely used. Its main feature is without any gas protection, can be applied under the four wind power welding, field welding flexibility and wind resistance was significantly better than the CO_2 welding, can be used directly to the power (special welding machine) for welding, but also has a welding The lightweight (without trachea), the bevel assembly accuracy is not high, with the advantages of easy to use, high efficiency, and to achieve semi-automatic welding. Therefore, it has been widely used in foreign countries such as construction, machinery, shipbuilding, bridges, oil transportation, gas transmission, water pipelines, oil tanks, blast furnaces and hot stoves. In addition, with the development of our economy, high-rise building steel structure is not