Stainless steel electrode can be divided into chromium stainless steel electrode and chrome-nickel stainless steel electrode, and who meet the state target these two Types Of Welding Wire, according to GB the GB/T983-1995 delineated investigated. Chromium stainless steel with corrosion (oxidizing acids, organic acids, cavitation) heat and corrosion performance. Is usually chosen to interest the power plants, chemical, oil and other equipment and materials. But under ordinary circumstances of chromium stainless steel weldability is poor, should pay attention to the welding process, heat treatment conditions and selection of appropriate discount of welding stainless steel electrode which classification? . Chrome-nickel stainless steel electrode with good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical equipment, making system. Is because the heat from the anti-eye intergranular corrosion, welding current is not too large, about 20 percent less than the carbon steel electrode, the arc should not be too long, rapid cooling between layers appropriate to the narrow stainless steel Stainless Steel ElectrodeMinutes
A martensitic stainless steel welding:
The martensitic stainless steel with exposed chrome 5 ~ 9% of chromium steel and high chromium steel containing 12% chromium. Such steel hardened bias, welding prone to high hardness of martensite with bainite brittle adds, residual stress, easily produce cold cracks. Therefore necessary to carry out the individual welding to preheat and warm, but not yet cold after welding back line low-temperature tempering.
2, chromium stainless steel welding:
The welding of such chromium steel after hardening large and prone to crack, the use of similar chromium stainless steel electrode (CHK202, CHK207) Welding must be carried out more than 300 ℃ preheat and post-weld tempering around 700 ℃ by slow cooling. Weldments after welding can not be carried out, the use of chromium stainless steel electrode welding (CHS107, CHS207).
3, 17 chrome stainless steel welding:
Such chrome steel for improved corrosion resistance and weldability and usually add the appropriate quality solid meta Yan titanium, niobium, molybdenum, can solderability evil compared with 13 chromium steel, can be common types of chromium stainless steel mesh electrode ( CHK302, CHK307) AC welding. Before welding, the weldment should be to join the pre-warm about 200 ℃, welding behind the words 800 ℃ Zuozuo, owned by the fire disposal. Chrome-nickel stainless steel electrode (such as CHS107 CHS207) can also be taken into walking the heat treatment after welding.