Welding material for ZG40Cr25Ni20
A welding material and welding process technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as unsatisfactory high-temperature mechanical properties of welds, hidden dangers in stability and safety, and achieve superior synergy The effect of function, high temperature mechanical properties, and excellent corrosion resistance
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Embodiment 1
[0019] Two nickel-based rolled plates with specifications of 450mm×75mm×20mm were selected as welding samples, and a V-shaped butt groove was adopted. The groove type was: the length of the blunt side was 1mm, and the groove angle was 60°.
[0020] The above-mentioned welding samples were welded by GTAW welding process; the welding machine model used was WSM-4000 inverter pulse argon arc welding machine; the welding material used was welding wire with a diameter of φ2.4mm, and its composition was: C 0.03% , Cr 16.8%, Fe7.2%, Mn 0.4%, Nb 2.45%, Si 0.85%, S 0.002%, P 0.002%, Ni balance.
[0021] The connection mode between the welding machine and the welding sample is direct current connection. The welding process includes the following steps:
[0022] (1) Clean the groove surface of the sample to be welded, keep it clean and dry, then connect the groove according to the above-mentioned V-shaped butt joint method, fix the position by spot welding, and then pass argon gas for pr...
Embodiment 2
[0026] Two nickel-based pipe sections with specifications of φ120mm (outer diameter) × 15mm (wall thickness) × 150mm (length) were selected as welding samples, and U-shaped butt joint grooves were adopted. The groove form was blunt edge length 1mm, radius 4mm, Groove angle 25°.
[0027] Using the same welding consumables, equipment and welding process as in Example 1, the above welding samples were welded. The connection mode between the welding machine and the welding sample is direct current connection.
[0028] The welding process includes the following steps:
[0029] (1) Clean the groove surface of the sample to be welded, keep it clean and dry, then connect the groove according to the above U-shaped butt joint method, fix the position by spot welding, and then pass argon gas for protection;
[0030] (2) Carry out bottom welding on the welding sample, the welding current is 90A, the voltage is 12V, the welding speed is about 0.8mm / s, and two layers are welded;
[0031]...
Embodiment 3
[0032] Embodiment 3 (comparison)
[0033] The welding material in Example 1 was changed to ERNiCr-3 welding wire with a diameter of φ2.4mm, and other conditions remained unchanged.
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