Continuous annealing and pickling line welding method for martensitic stainless steel
A technology of martensitic stainless steel and welding methods, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of easy cracking of welds, avoid weld fractures, avoid cracking of annealing and pickling lines, and increase protection intensity effect
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[0021] Example 1,
[0022] The specific MIG welding parameters for 50Cr15MoV stainless steel are shown in Table 1.
[0023]
[0024] The annealing and pickling line needs to weld two coils of annealed 50Cr15MoV stainless steel with a thickness of 5.0mm before and after welding. First, according to the coil thickness, use the corresponding parameters in Table 1 to weld the coil weld 1 to form. The welding wire is 309Si and the specification is 1.2mm.
[0025] The rib 3 is prepared in advance, the material is 304 annealed, the electrode material is 309L, and the specification is 2.5*350mm. The size of the ribs 3 is the same, the specific specification is 4.0 (thickness)*100*300mm, and the circumference is arc-shaped, and the arc radius is 10mm to avoid stress concentration and cracking at the corners. The specific shape is as figure 1 Shown.
[0026] Use a crescent-shaped incision shearing device to cut off the arc starting and ending arc sections of the steel coil weld 1 to avoid poo...
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[0032] Example 2,
[0033] The annealing and pickling line needs to weld two coils of annealed 50Cr15MoV stainless steel with a thickness of 3.0mm before and after welding. First, according to the coil thickness, use the corresponding parameters in Table 1 to weld the coil weld 1 to form. The welding wire is 309Si and the specification is 1.2mm.
[0034] Prepare the rib 3 in advance, the material is 304 annealed, the size of the rib 3 is the same, the specific specification is 1.5 (thickness) *100*300mm, and the circumference is arc-shaped, the arc radius is 5mm, to avoid stress concentration cracking at the corners , The specific form is like figure 1 Shown.
[0035] Use a crescent-shaped incision shearing device to cut off the arc starting and ending arc sections of the steel coil weld 1 to avoid poor forming at these two places, causing the strip to first crack in the arc starting and ending arc sections during operation, and then welding Seam torn.
[0036] Two operators stand ...
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