High-strength steel stranded electrode and welding method thereof
A technology of stranded welding wire and high-strength steel, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of strength and toughness matching and welding process performance that are difficult to meet the technical requirements of steel pipe welding for offshore drilling platforms, and achieve excellent technology. performance, reduced material waste, the effect of good welding manufacturability
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[0030] Example 1
[0031] A high-strength steel stranded welding wire, its components include carbon 0.06%, silicon 0.8%, manganese 1.4%, nickel 0.9%, titanium 0.1%, chromium 0.18%, copper 0.02%, aluminum 0.05%, phosphorus <0.010%, sulfur <0.005%, and the balance is iron.
[0032] The welding method of the high-strength steel stranded welding wire includes the following steps:
[0033] S1. The welding groove is processed by mechanical method, and argon gas is used for welding protection when cutting, and the groove processing surface is polished smooth; wherein the welding groove angle is 40°, and the horizontal welding position adopts symmetric groove;
[0034] S2. Use single-pulse welding mode to weld the bottom bead, the welding current is 125A, the wire feeding speed is 5m / min, the width of the reverse weld is 7mm, the penetration depth on both sides of the root is 3mm, and the surface of the weld bead is cleaned; then double pulse In the welding mode, two welds are welded in seq...
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[0036] Example 2
[0037] A high-strength steel stranded welding wire, its components include carbon 0.12%, silicon 0.4%, manganese 2.0%, nickel 0.5%, titanium 0.16%, chromium 0.14%, copper 0.04%, aluminum 0.02%, phosphorus <0.010%, sulfur <0.005%, and the balance is iron.
[0038] The welding method of the high-strength steel stranded welding wire includes the following steps:
[0039] S1. The welding groove is processed by mechanical method, and argon gas is used for welding protection when cutting, and the groove processing surface is polished smooth; wherein the welding groove angle is 45°, and the horizontal welding position adopts a symmetric groove;
[0040] S2. Use single pulse welding mode to weld the bottom bead, the welding current is 115A, the wire feeding speed is 5m / min, the width of the reverse side weld is 8mm, the penetration depth on both sides of the root is 2mm, and the surface of the weld bead is cleaned; then double pulse In the welding mode, two welds are welde...
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[0042] Example 3
[0043] A high-strength steel stranded welding wire, its components include carbon 0.08%, silicon 0.7%, manganese 1.6%, nickel 0.8%, titanium 0.11%, chromium 0.17%, copper 0.025%, aluminum 0.04%, phosphorus <0.010%, sulfur <0.005%, and the balance is iron.
[0044] The welding method of the high-strength steel stranded welding wire includes the following steps:
[0045] S1. Use mechanical methods to process the welding groove, use argon gas for welding protection when cutting, and polish the groove processing surface smoothly; wherein the welding groove angle is 41°, and the horizontal welding position adopts symmetric grooves;
[0046] S2. Use single pulse welding mode to weld the bottom bead, the welding current is 117A, the wire feeding speed is 5m / min, the width of the reverse weld is 7.2mm, the penetration depth on both sides of the root is 2.9mm, and the surface of the weld bead is cleaned; In the double-pulse welding mode, two welds are welded in sequence, th...
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