Welding faculties of thick-walled stainless pipe susceptible to warm breaking measures to prevent around possible so your weld material biphasic company managed ferrite content of 3-5% or less.
Because lots of dissolved ferrite dangerous bodily S,Welding k94600 vulnerable to issues and preventive actions Articles P impurities. Just make an effort to use high-quality fundamental coated electrodes, in order to restrict the weld material S, P, C and other content. Intergranular rust when hot to 450-850 sensitizing temperature zones at the wheat border precipitation of chromium depletion idea based on the weld and temperature affected zone of chromium carbide, chromium depletion caused by feed boundaries, insufficient degree of rust resistance.
Methods in order to avoid the use of low or ultra-low carbon welding consumables, such as the A002 and so on; using titanium, niobium and different stabilizing aspect electrode, such as A137, A132 and so on. By wire or rod to weld in to a certain amount of ferrite creating components, so that the weld metal becomes duplex austenite + ferrite, (ferrite control generally speaking 4-12%). Narrow the weld pool overheating, work with a smaller and quicker welding current welding pace, the chilling rate. Intergranular rust resilient weldment challenging weld annealing treatment after stabilization. Strain deterioration breaking Strain corrosion breaking is postponed breaking of welded joints in a specific harsh atmosphere when subjected to tensile tension generated. Tension rust breaking of austenitic metal welded bones is welded bones more serious failure modes, revealed number damage to the plastic brittle deformation. Tension deterioration breaking and realistic steps to stop the progress of growing and construction process, to reduce the degree of cold deformation, avoid requiring the construction, the construction process to prevent injuries the effect of a selection of incidents and numerous assembly arc burn marks can become a way to obtain SCC crack quickly trigger corrosion pits.
Reasonable choice of welding consumables weld and foundation metal should be excellent fit, does not create any undesirable structure, such as for example grain coarsening and fragile martensite; get correct welding process to make sure excellent weld, doesn’t generate any strain attention or pitting defects, such as for example undercuts; take fair welding series, reducing the welding continuing pressure level; remove tension treatment following welding heat therapy, such as completely annealed or annealed after welding; difficult to apply when heat treatment following welding hammer or using apply balls.
Production administration actions to manage the moderate of toxins, such as for example ammonia medium O2, N2, H2O, etc.; liquefied petroleum fuel in H2S; chloride option O2, Fe3 +, Cr6 +, etc.; rust treatment: such as for example films, linings or cathodic defense; putting inhibitor. Low heat embrittlement of the weld material of austenitic stainless steel for welded bones at reduced temperatures applying plastic weld steel longevity is the key issue. At this point, there’s a weld in ferrite is definitely selected to avoid the deterioration of the natural low-temperature longevity of austenitic welding consumables and welding processes to acquire an absolute change austenitic welds procedures adopted.