Welding Wire China scrapped: Structural Carbon Steel Welding Electrode , low hydrogen electrodes and heat-resistant steel, low temperature steel electrodes, cored wires rust serious (drug skin core welding with curved electrode method revealed), drug skin serious damp surface "white flowers" serious occurrence of drug the skin adhesion the knot cake, or drug skin chalking off (such as cast iron electrode) transition alloying elements rely on drug skin electrodes found to the drug skin peeling off, that such electrodes can not be used, precious core welding, such as stainless steel core wire, nickel base metal core, can still get rid of drug skin, re-extrusion coating.
Select electrodes based on the steel chemical composition, mechanical properties , crack resistance requirements , taking into account the welded structure, plate thickness , workingCondition , the force , a comprehensive analysis of welding performanceandotherfactors.Ifnecessary,do the welding test , develop appropriate technical measures , and then determine the choice ofElectrode.â’ˆ carbon steel welding is generally used with corresponding strength grade of steel rod , taking into account the complex structure , plate, stiffness, dynamic load, Weldability poor , generally used in good plasticity , impact toughness, crack resistance good low hydrogen type electrode . There are special requirements for the welding position , theUsing the corresponding specific electrode , such as vertical down welding , welding , etc. bottoming . Can be used to improve the welding efficiency iron powder type electrode .â’‰ the weld cooling speed, strength increased, weld cracks easily , and then you can use a low strength than the base metal of the electrode ; carboSteel and low alloy steel welding between dissimilar , generally used with low intensity level corresponding welding of steel and low alloy steel factors to consider ,To use low hydrogen type is appropriate.â’Š for welding of carbon steel , high Cast Iron Electrodes content of the steel , increasing the weld cracking tendency , generally used in low hydrogen type electrode and the use of pre-Heat, cold and other methods , and slow to adapt to the welding process and other measures.â’‹ steel weldability is poor , generally the higher Aluminium Welding Rods content , the workpiece Heavy , complex structure, easy to weld cracking , when the multi- cast alloy elements, It is more prominent. Generally used in low hydrogen type electrode and taking preheating, slow cooling methods such as welding , etc. and the corresponding measures .â’Œ To ensure the quality of welding , weld the workpiece should be clean , not allowed to have oil, rust , moisture, paint and dirt, etc. , the use of low-Hydrogen type electrode is particularly important.â’ for low hydrogen electrodes , welding electrodes shall be 350 â„ƒ baking 1h, and with the drying with the use , or easy to produce pores, slag , cracks and other defectsCellulose electrodes generally do not need baking , if wet, before welding according to the instructions specified temperature baking , but the temperature is too high will destroy electrode welding processEnergy .â’Ž welding current specified in the instructions as a reference value , the actual operation should be specific to master, such as workpiece preheating, 5% lower than the normal current ~15% ; vertical and overhead welding welding welding current is small than the level of 10% to 15% ; comparable AC DC when reduced by 10 percent. When using the DC welder , NoteItalian manual provides welding class character , or affect the welding process.â’ for low hydrogen type electrode generally not repeated baking , to prevent drug skin crisp , shedding