Questions regarding welding materials and heat treatment
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Dear experts, one of our company’s products requires heat treatment after welding. Upon arriving at the site, we found that the prefabricated parts had not been welded yet. The on-site welding engineer recommended a type of electrode, stating that no heat treatment would be necessary after welding. Is such an electrode available?
Haven’t heard of it; that’s quite novel. If it really exists, the original poster should remember to let everyone know – we all want to learn about it! !
High-tech, ah – a quite novel welding rod; it’s likely that some “expert” engineer came up with it on his own
In the case of welding after post-weld heat treatment, if a full-scale heat treatment is no longer possible, a partial heat treatment can be carried out. The welding engineer said that no heat treatment is required; it seems that with this type of electrode, no preheating is needed before welding, and neither post-weld heating nor heat treatment is necessary to achieve the desired properties of the weld. But if the equipment needs heat treatment, it is inevitable.
When heat treatment conditions are not available on site, nickel-based alloy electrodes can be used. If it is a critical piece of equipment, use it with caution; if that’s not possible, build a steel frame. The issue of missed soldering on pre-soldered components is something that occurs in many projects.
There are welding materials that allow for the elimination of post-weld heat treatment, such as nickel-based and austenitic welding materials
Nickel-based welding materials can be used without heat treatment.
Discuss with the owner or designer; if that doesn’t work, carry out post-weld heat treatment； Such welding rods don’t exist at all; nickel-based welding materials won’t work either, right?
Nickel-based welding materials or austenitic welding materials can be used, but it is important to have process qualification as a basis; that is, a qualified welding process is required to ensure reliability. Moreover, the suitability of these materials depends on the specific conditions, as the additional stresses resulting from welding dissimilar steels under high temperature and pressure must be taken into account