中文
Stainless steel core wire can be used with an inert gas shielded arc welding (TIG, MIG welding). Also be used for submerged arc welding. Stainless steel MIG welding can achieve highly efficient welding and welding automation, but also easy to implement and widely used in areas such as surfacing and sheet connected. MIG welding wire chemical composition and TIG Welding Wire , but some of the stainless steel variety, a SI with higher levels of MIG wire, such as corresponding with the ER308, ER309 wire ER308Si, ER309Si, etc., containing Si up to about 0.8%, reduces the surface tension of the metal droplet, the droplet particles thinner, easier to implement jet excessive, so that the arc becomes more stable. While improving the wettability of the metal droplet, so that the corrugated appearance of the weld bead and difficult to produce the lack of penetration, folder slag, porosity, lack of filling. Stainless steel core wire, its chemical composition and gas shielded arc Flux Cored Welding Wiresubmerged arc welding, but should be equipped with no fierce silicon fluoride or manganese low-silicon high fluoride melting flux.
The martensitic stainless steel, chrome 5 ~ 9% chromium steel and high chromium steel containing 12% chromium. Such steel hardened tendency of large, easy to produce high hardness of martensite and bainite to the fragility, the residual stress, prone to cold cracks in the weld. Therefore, general welding must be performed before the warm-up and the interlayer insulation, has not yet cooled high-temperature tempering after welding.
2, chromium Welding WiresThe welding of such chromium steel after hardening large and prone to crack, the use of similar chromium stainless steel electrode (CHK202, CHK207) welding, must deal with more than 300 ℃ preheating and welding about 700 ℃ tempering slow cooling. Weldments after welding can not be carried out, the application of a chromium stainless steel electrode (CHS107, CHS207) welding.
3, 17 chrome stainless steel welding:
Such chrome steel usually can be used to improve the corrosion resistance and weldability and add the right amount of stable element titanium, niobium, molybdenum, weldability is better than the chrome 13 steel, chrome Stainless Steel Electrodeof the same type (CHK302 CHK307) welding. Before welding, the weldment should be about 200 ℃ preheating, about 800 ℃ tempering after welding. Also can be chrome-nickel stainless steel electrode (such as CHS107 CHS207), post-weld heat treatment.
