Electrode Drying: Basic things that welding engineers need to know First of all, you need to know the equipment related to baking and warming. These 2 welding wires are not the same. Baking requires a wire incubator, while the preheating uses a wire preheating cylinder. Available in sizes from 50 kg to 200 kg.
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Welding Wire Preheating Cylinder Heats up to 5 kg at a time. Steel bar, black, to pull out the welding wire. Usually we see it placed upright, but in this case the manufacturer intends to show it. How to use it in bed
Here, it must be known that Which type of welding wire must be annealed? The main ones are low hydrogen wire or Basic electrode. This needs to be annealed. Because if not annealed, the weld may be caused by hydrogen cracking, but if it is a welding wire in the rutile and cellulose groups No need to bake, it is recommended to refer to the specification of the welding wire by looking at the aws A5 standard or the applicable Code Standard or the standard of the welding wire manufacturer.
However, for low hydrogen electrodes, it is recommended to be cured at 260 to 425 °C for 1-2 hours and to be reheated to 30 to 140 °C above operating temperature.
Why is the hydrogen electrode low? Therefore, the wire must be annealed before use.
The answer is work that requires high strength. Also known as engineering work, whether it is structural work, pressure tanks, gas pipes, oil pipes. subjected to pressure And with quality assurance involved, these have to be annealed due to the prevention of hydrogen cracking, also known as H2 crackling.
While rutile welding wires such as E6013 are used for sheet metal applications or thin applications that do not require much weld strength. Therefore, there is no need to preheat or heat the wires before use.
Basic or low hydrogen type flux shielded wire Will have a toughness (Toughness) that is higher than other groups of wires. It is the toughness from impact or Impact Test, which is different from the toughness that is ductility from the Tensile Test.
Welding rods and welding rods The humidity contained in the air in general It is a major obstacle to the welding wire. poor welding scaly or porous at the weld if there is moisture should be annealed wire Remove moisture before welding. Welding rod cylinder Temperature should be adjusted from 100 – 400 degrees Celsius because of each type of welding wire. Different baking time and temperature, for example Kobe LB-52 electrodes should be cured at 300 – 350 degrees Celsius for 30-60 minutes. Kobe KOBE-30 electrodes should be preheated before use. at a temperature of 70 – 100 degrees for 30-60 minutes, etc.
Cylinder for welding wire, 220 volts, with a size of welding wire from 5 kg. and 10 kg. Suitable for outdoor welding or high-altitude welding. welding rod cylinder It has the following distinctive features:
– Light weight, easy to move
– Retains heat well because it is lined with synthetic fiber insulation as well
– Can accelerate the heat from 100 – 400 degrees Celsius
– There is a hook to pull the welding wire.
– paint used for exterior Can protect both chemicals and corrosion from sea water
wire incubator for welding wires on large job sites The wire incubator is 50 kg and 100 kg, the power system is 220 and 380 volts, the temperature can be adjusted from 100-400 degrees Celsius. good heat preservation The cabinet lid is firmly locked. The inside of the incubator is divided into three layers in order to distribute heat evenly into the welding wire. The upper compartment helps to keep the temperature at 100 degrees.