Iron and aluminum intermetallic compound and steel impulse fusion welding method
A technology of intermetallic compounds and pulses, which is applied in the field of welding between dissimilar materials, fusion welding between iron-aluminum intermetallic compounds and carbon steel dissimilar materials, and can solve the problem of reducing the mechanical properties of the joint area, limiting the scope of application, and coarse tissue, etc. problems, to achieve the effect of eliminating the formation of pores and brittle phases in the fusion zone, convenient operation, and excellent structural properties
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[0019] Example 1:
[0020] The butt welding of iron-aluminum intermetallic compounds with a length of 160mm, a width of 70mm and a thickness of 4mm and a 1Cr18Ni9Ti stainless steel plate, using a Cr25Ni13Mo2Nb alloy wire with a diameter of 1.6mm as the filler metal, the process steps of pulse tungsten argon arc welding are as follows:
[0021] (1) Use a manual grinding wheel to grind the butt joint of the iron-aluminum intermetallic compound and the 1Cr18Ni9Ti stainless steel plate into a V-shaped groove of about 60°;
[0022] (2) First remove the oil stain on the surface of the welding wire with acetone, then use 15% NaOH solution by volume, clean at 25℃±5℃ for 15min, rinse with clean water and then dry at 60℃.
[0023] (3) Cr25Ni13Mo2Nb austenitic steel welding wire is calculated as mass percentage, the Cr content is 24.5%, the Ni content is 13.5%, the Mo content is 2.5%, the Nb content is 0.85%, and the balance is steel.
[0024] (4) Point-fix the test plate and use DC pos...
Example Embodiment
[0026] Example 2:
[0027] The butt welding of the iron-aluminum intermetallic compound with the outer diameter of the nozzle of 116mm, the wall thickness of 6mm and the length of 180mm and the Q235 low carbon steel pipe fittings adopts the Cr25Ni13Mo2Nb alloy wire with a diameter of 2.0mm as the filler metal for pulse tungsten argon arc welding. The process steps are:
[0028] (1) Grind the butt joint of the iron-aluminum intermetallic compound and the Q235 low carbon steel pipe into a single-sided V-shaped groove of about 60° with a self-rotating beveling machine;
[0029] (2) First remove the oil stain on the surface of the welding wire with acetone, then use 15% NaOH solution by volume, clean at 25℃±5℃ for 15min, rinse with clean water and then dry at 60℃.
[0030] (3) Cr25Ni13Mo2Nb austenitic steel welding wire is calculated by mass percentage, the Cr content is 25.5%, the Ni content is 13.5%, the Mo content is 2.5%, the Nb content is 0.85%, and the balance is steel.
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