| 摘要 |
In flux-cored wire electrodes for vertical automatic welding, from bottom to top, there is an electric arc under gaseous protection, the wires having diameters of 1 to 4 mm and generally shaped internally in any configuration, such as tubular, heart-shaped and composite, characterized by a sheath of steel strip, and a powdered filling flux most preferably including the following ingredients in qualitative and quantitative composition by powder weight: }Iron powder 73% }Silicofluoride of }potassium (K2SiF6) 4% }Cryolite (Na3AlF6) 2% }Nickel powder 3% }Ferro-molybdenum (at }65 up to 75%) 0.8% }Refined ferromanganese }(85 up to 90%) 9.9% }Ferrosilicon (45%) 1% }Ferrotitanium (30%) 0.5% }Micaceous iron oxide 1% }Fine silica 4% }Silicocalcium (SiCa) 0.8% } 100.0% } The flux-cored wires most preferably have a filling coefficient of 32 grams of powder weight per 100 grams of strip.
|
