Corrosion-resistant metallurgical composite bimetal longitudinal submerged-arc welded steel pipe and method for manufacturing same
A composite bimetallic and straight seam submerged arc technology, which is applied in metal rolling, arc welding equipment, metal processing equipment, etc., can solve the problems of easy generation of gaps, inclusion of stolen goods, and limited application, and achieve high accuracy of shape and size, Good corrosion resistance and high degree of mechanization
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[0023] Example 1
[0024] See the manufacturing process figure 1 .
[0025] (1) Raw material inspection: corrosion-resistant metallurgical composite bimetallic steel plate (carbon steel thickness is 19mm, model is Q235B; corrosion-resistant layer thickness is 304L (3mm), model is 304L), after appearance, size inspection and various mechanical and corrosion resistance properties Feed the materials after passing the inspection and marking; to ensure that the raw materials meet the quality requirements;
[0026] (2) Welding arc ignition and quenching plates: The arc ignition and quenching plates are made of the same materials as steel pipes, Q235B, 304L, so that the arc ignition and arc extinguishing of the steel pipe welding are carried out on the arc ignition and quenching plates. In order to ensure the quality of steel pipe welds.
[0027] (3) Steel plate UT (ultrasonic flaw detection) inspection: automatic UT is used to perform 100% inspection on the surface of the steel plate, and...
Example Embodiment
[0048] Example 2
[0049] (1) Raw material inspection: corrosion-resistant metallurgical composite bimetallic steel plate (carbon steel layer thickness 14mm, material model X60); corrosion-resistant layer thickness 3mm, model 316L, passed appearance, size inspection, and various mechanical and corrosion resistance tests Feed the materials after marking; to ensure that the raw materials meet the quality requirements;
[0050] (2) Welding arc-igniting and extinguishing plate: the same material X60 as the steel pipe is used; the corrosion-resistant layer 316L is used to make the arc-igniting and extinguishing plate, so that the arc starting and extinguishing of the steel pipe are carried out on the arc-igniting plate and the arc extinguishing plate.
[0051] (3) Steel plate UT (ultrasonic flaw detection) inspection: automatic UT is used to perform 100% inspection on the surface of the steel plate, and the internal quality of the steel plate is further checked to ensure that the material...
Example Embodiment
[0067] Example 3
[0068] (1) Raw material inspection: corrosion-resistant metallurgical composite bimetallic steel plate (carbon steel layer thickness 20mm, material model Q345B; corrosion-resistant layer thickness 2mm, model 310S), which is qualified and qualified after appearance and size inspection and various mechanical and corrosion resistance tests Feed the materials after marking; to ensure that the raw materials meet the quality requirements;
[0069] (2) Welding arc ignition and quenching plate: the same material Q345B as the steel pipe is used; the corrosion-resistant layer 310S is used to make the arc ignition and quenching plate, so that the arc ignition and arc extinguishing during the welding of the steel pipe are carried out on the arc ignition and quenching plates.
[0070] (3) Steel plate UT (ultrasonic flaw detection) inspection: automatic UT is used to perform 100% inspection on the surface of the steel plate, and the internal quality of the steel plate is further...
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