Carbon steel electrode ( the deposited metal tensile strength that is less than or equal 500MPa 50kgf/mm2) Flux Cored Welding Wire steel and low-strength low-alloy steel welding .Select the rod , it is usually based on the steel chemical composition, mechanical properties , crack resistance requirements, and must take into account the shape of welded structures ,Working conditions, stress condition and welding equipment performance and other factors . When necessary , to carry out welding tests to determine the process measures , and indeedBe selected electrode. Usually requires good plasticity , impact toughness, crack resistance , use low -hydrogen electrodes . There are special requirements for welding positionMay use the appropriate special electrode , to improve the welding efficiency , the choice of iron powder electrode and so on. Welding current specification proposed , is a parameterReference value , the workpiece , such as preheating , comparable to the normal current is reduced to 15% , the use of DC, the ratio of exchange can be reduced 10-15% . For low hydrogen type ,Iron welding rod , welding rod must be 350 or more before baking , as possible with the drying with the use of the principle of how much bake much , otherwise it willProduce welding defects ( such as pores , slag , cracks , process performance deterioration , etc. ) . Cellulose type electrode , should be strictly in accordance with the instructions provided bakeBaking baking temperature , the temperature is too high , it will burn off the cellulose coating , destruction electrode inherent process performance. When using low hydrogen type electrode, Welders should be living in the windward position , strengthen exhaust, welding fumes prevent harm to the body . For low hydrogen type electrode baking times as possible without its More than twice to prevent drug skin brittle , shedding