The process performance of the electrode refers to the performance of the electrode in the welding operation. It is one of the important indicators to measure the quality of the electrode. The process performance of the welding rod mainly includes: the stability of the welding arc, the formation of the weld seam, the adaptability of the welding in various locations, the splash, the slag removal, the melting speed of the welding rod, the degree of redness of the coating, and the amount of dust generated by the electrode. The stability of the welding arc requires that the intensity of the arc and arc in the welding process is not strong or weak, and is easy to start the arc and re-arc. For different welding rods, the potassium and sodium ions contained in the acidic coating are high, and the stability of the arc is improved. The deionization components such as fluorspar are often present in the coating of the low-hydrogen electrode, so the arc stability of the welding arc is reduced. The good formation of the weld requires a smooth surface, fine and beautiful corrugations, and correct weld geometry and dimensions. Welds should transition smoothly to the base metal, the remaining height in line with the standard, no undercut defects. Weld surface forming not only affects the appearance, but more importantly the mechanical properties of welded joints. Poorly formed welds can cause stress concentration and cause early damage to welded parts. The main factors affecting the formation of the weld besides the operational reasons are the solidification temperature of the slag, the viscosity of the high-temperature slag, the surface tension, and the density. Electrode with good process performance can adapt to space all-position welding. Almost all welding rods can be welded flat, while horizontal welding, vertical welding, and overhead welding are not all capable. The main issue for horizontal, vertical and overhead welding is the effect of gravity on the droplets. The arc and air blowing force should be appropriately increased to send the droplets to the bath and prevent the metal and slag from flowing down. The melting point, viscosity and surface tension of the slag are also the technical measures to solve the all-position welding of the welding rod. The metal particles that fly out of the droplet or bath during welding are called splashes. Splashing not only contaminates the weld seam and its vicinity, but also increases the difficulty of cleaning. Excessive spatter damages the normal welding process and reduces the welding efficiency of the welding rod. If welding current and arc length are increased, splash increases. The type of power supply and the transition pattern of the droplets also have some influence on the splash. In general, the titanium-calcium-type electrode is stable in arc burning, the droplets are fine-grained, and the spatter is small. The arc stability of the low-hydrogen electrode is poor, and the droplets are mostly short-circuited by large particles, so the spatter is large. The slag detachability refers to the ease of removing the slag shell from the surface of the weld after welding. Poor slag removal welding electrodes will not only cause difficulties in slag removal, but also reduce the efficiency. In addition, slag inclusion may also occur during multilayer welding. Melting speed of the electrode affects the productivity of welding. The coating composition affects the arc voltage. The lower the ionization potential of the arc atmosphere, the lower the arc voltage and the less the arc heat, so the melting coefficient of the electrode becomes smaller. The redness of the electrode coating is the phenomenon that the redness, cracking, or peeling of the skin occurs due to the temperature rise of the coating when the electrode is used in the latter half of the electrode. The key to the solution is to adjust the electrode coating formula, improve the droplet transfer pattern, increase the melting coefficient of the electrode, and reduce the resistance heat to reduce the surface temperature rise of the electrode. During welding, the liquid metal and molten slag at the end of the electrode evaporate and condense under the high temperature of the arc, forming a large amount of pyrotechnics. Dust causes the greatest harm to the welder's health. In order to protect the welder, in addition to the use of dust and ventilation and other technical measures, we must also make certain adjustments in the design of the electrode, to avoid the use of harmful elements. The company's Sports Equipment Co., Ltd. warm reminder: Caring for children's healthy growth, starting from paying attention to children's safety!
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