1, martensitic stainless steel electrode
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.