The role of silicon in stainless steel welding wire
Silicon is added as a deoxidizer, and its action is stronger than manganese. It can eliminate the influence of FeO inclusion on the quality of steel. Stainless steel wires, such as ER308, ER308L, ER316, ER316L and so on, contain different components of silicon
Silicon (Si) in the main role in the stainless steel wire have: the solid solution strengthening effect, improve the resistivity (good for welding deposition efficiency of hot wire welding), reduce hysteresis loss, improve permeability, improve hardenability, anti tempering brittleness, to improve the comprehensive mechanical properties, high elastic limit, corrosion resistance increased the favorable natural conditions, content is higher, lower solderability, and easily lead to cold brittle.At the same time, a certain amount of silicon can also increase the fluidity of the deposited metal and the corrosion resistance of the wire.Everything is on the current US There are both advantages and disadvantages., a three generation nuclear power construction, the main pipe of the nuclear level equipment reactor uses the original welding wire is 316LSi, the wires have been bought, but in the process of evaluation, were told to not be used, and replaced with 316L or 316LN, while a variety of reasons, different experts there are different opinions. After all, nuclear power is no small matter, the use of wire containing Si is very common at present, but in the nuclear level of important items, we have no right to decide on it.
