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近年来,高强度直缝焊管占钢管产量的比重越来越大。热交换器用管、锅炉用管、高压高温用碳素管及各种结构用管广为应用在航天、印染工业及核电站、输送管线、大型发电站等部门。直缝高强度焊管的优点是:焊缝热影响区小,加热速度快,在1╱100~s内可把金属加热到焊接温度1130～1350℃;大大提高了焊接速度和焊接质量。这种方法不仅可以焊接碳素钢、铝合金和铜合金,而且还可以焊接
In recent years, high-strength straight seam welded pipe accounts for the proportion of steel production more and more. Heat exchanger tubes, boiler tubes, high pressure and high temperature with carbon tubes and a variety of structural tubes widely used in aerospace, dyeing and printing industry and nuclear power plants, transmission lines, large power stations and other departments. The advantages of straight seam high strength welded pipe are as follows: heat affected zone of welding seam is small and the heating speed is fast, the metal can be heated to the welding temperature 1130 ~ 1350 ℃ within 1/100 ~ s; the welding speed and welding quality are greatly improved. This method can not only weld carbon steel, aluminum alloy and copper alloy, but also can be welded