The carbon steel electrode for carbon steel and low-strength low alloy steel.

Select the electrode based on the steel chemical composition, mechanical properties, crack resistance requirements, taking into account the comprehensive analysis of welded structures, plate thickness, working conditions, stress, welder performance and other factors. Necessary, to do the welding test, formulate corresponding measures to determine the selection of the electrode.

â’ˆ carbon steel welding is generally used in steel strength grade corresponds to the electrode, taking into account the complex structure, slab stiffness, dynamic load, poor weldability is generally used in good plasticity, impact toughness, good crack resistance of low hydrogen electrodes. Special requirements of the welding position, using the corresponding special electrode, such as vertical down welding rod, the base Copper Electrode. Iron powder type electrode can be used to improve the welding efficiency.

â’‰ fast on the weld cooling rate, increased strength, weld cracks easily, lower than the parent material strength level electrode can be used; between the low-carbon steel and low alloy steel, dissimilar steel welding is generally used with low strength grade steel electrode, and considering the factors of low-alloy steel, in order to use low-hydrogen type is appropriate.

â’Š welding of medium carbon steel, due to higher carbon content of steel, increasing the tendency of welding cracks, generally used in low-hydrogen electrodes and preheating and slow cooling method and adapt welding processes and other measures.

â’‹ cast steel weldable poor generally higher carbon content, the workpiece Heavy, complex structure, easy to produce a weld crack cast steel alloying elements for a long time, it is more prominent. Generally used in low-hydrogen electrodes, and to take measures to warm-up, slow cooling method and the corresponding welding process.

⒌ as to ensure the quality of welding, the workpiece weld should be clean, not allowed to have oil, rust, water, paint and dirt, is particularly important to use low-hydrogen electrodes.

⒍ low hydrogen type electrode, Welding Electrodes shall be subject to 350 ° C baking 1h as baking, or easy to produce pores folder slag, cracks and other defects. Cellulose electrode without baking in general, if damp, temperature welding instructions provided before baking, but the temperature will destroy the electrode welding performance.

Welding current specified in â’Ž instructions as a reference value, the actual operation should be specific to master, such as workpiece preheat than normal current 5% to 15%; vertical welding and overhead welding flat welding current 10% to 15%; DC than AC decreases about 10%. Attention to the instructions provided in DC welder, welding class nature, or affect the welding process.

⒏ low hydrogen type electrode generally should not be repeated baking to prevent drug skin crisp, fall off.