序半自动二氧化碳气体保护焊具有效率高、质量好、成本低、适合全位置焊接等优点,在国外已得到广泛应用。国内不少单位做了大量工作,焊接了很多产品,但多采用细丝(0.8—1.2毫米,粗一点的焊丝(1.6—2.0毫米)虽也应用,尚不普遍,主要采用较小规范。在电机制造中随着大型水轮机的发展,钢材的厚度不断增大,低合金钢的应用也日益普 Semi-automatic carbon dioxide gas shielded welding with high efficiency, good quality, low cost, suitable for all-position welding and other advantages, has been widely used abroad. Many domestic units have done a lot of work, welding a lot of products, but the use of filaments (0.8-1.2 mm, thicker wire (1.6-2.0 mm) is also used, is not yet common, the main use of smaller specifications. With the development of large turbines in the motor manufacturing, the thickness of the steel is increasing, and the application of low alloy steel is becoming increasingly common