Technology for welding steel containing molybdenum
A welding process and steel technology, which is applied in the field of steel welding process containing molybdenum, can solve the problems of changing the mechanical properties of the base metal, poor welding performance, and contamination of the base metal for 2205 steel welding, achieving fast welding speed and small welding current , the effect of avoiding pollution
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[0011] The embodiment provided by the present invention is described in further detail:
[0012] A welding process for steel containing molybdenum, the element composition of the molybdenum-containing steel is (mass percentage): C ≤ 0.02%, Si ≤ 1.30%, Mn ≤ 1.80%, P ≤ 0.0305%, S ≤ 0.01%, Ni: 12.0 ~ 15.0%, Cr: 13.0 ~ 18.0%, Mo: 1.0 ~ 2.5%, balance Fe; including the following steps:
[0013] 1) Welding material: choose welding wire;
[0014] 2) Groove processing: adopt mechanical method, and the groove type is T-shaped;
[0015] 3) Preheating before welding: the preheating temperature should be greater than or equal to 12°C, and the ambient temperature should be greater than or equal to 0°C;
[0016] 4) Argon arc welding bottoming: the molten pool is passed through the protective gas argon, and the back protection gas is argon;
[0017] 5) Argon arc welding cover surface: the current is 140-160 amps, the voltage is 25-30 volts, the welding speed is 200-240 mm / min, the molten p...
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