In fact, there are many different types of metal elements in CO2 welding wire. The different element composition and even the quality of the welding wire will affect the overall welding work. High-quality welding wire has very good energy efficiency, and there are still many environmentally friendly materials, which really meets the current market demand. Welding wire is required for the welding of low carbon steel and low alloy steel, so its quality requirements are also very high. And the influence of different alloy elements on welding should be well understood in advance.
Influence of silicon
Silicon element is very common in CO2 welding wire, which mainly plays the role of deoxidation, which can effectively prevent iron and oxidation, and this can also ensure a good welding effect. If the silicon element is used for deoxidation alone, some small technology may be generated, which is difficult to float out of the molten pool, so it may cause some metal inclusions.
Effect of manganese
The effect of manganese is similar to that of silicon, but the deoxidation ability is not as strong as silicon. Using manganese alone to deoxidize, the density of manganese oxide produced is very high, and it is difficult to float out of the molten pool. However, the use of manganese can be combined with sulfurization to produce manganese sulfide, which can reduce the occurrence of cracks, and the practicality is good.
Effect of phosphorus
The N2 phosphorus element in CO2 welding wire can dissolve in the ferrite body, and the strengthening effect on steel is also very good. It can effectively improve the strength and hardness of steel, so that it can improve the corrosion resistance of steel. Therefore, the phosphorus element is still very important. It is necessary to ensure that the elements in the welding wire are reasonable, so that the welding effect is truly guaranteed.