Submerged arc welding wire of high tensile pipeline steel

A technology of submerged arc welding wire and pipeline steel, which is applied in the direction of arc welding equipment, welding medium, pipeline system, etc. It can solve the problems that cannot meet the requirements of X100 pipeline steel plate, and achieve the welding wire drawing process is easy to implement, low cost and stable quality Effect

Active Publication Date: 2010-12-08
YICHANG MONKEY KING WELDING WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing welding materials can not meet the requirements of X100 pipeline steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A 90-ton electric furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, Φ4.0mm welding wire is produced. . The chemical composition of the welding wire is calculated by weight percentage: C 0.076, Si 0.52, Mn 1.46, Ni1.45, Mo 0.35, Ti 0.06, V 0.02, Cr 0.25, B 0.003, S 0.005, P 0.010, the balance is iron and unavoidable impurities. The surface is copper-plated after being drawn into welding wire, and the copper content of the welding wire is 0.12%.

[0030] The above-mentioned Φ4.0mm welding wire is used together with SJ101G flux to conduct the mechanical property test of the deposited metal according to GB / T12470-2003. The base metal is X100. The welding specification is: welding current 500A, welding voltage 29V, welding speed 25±1.5cm / min, The interlayer temperature is 150±15°C, the tensile strength of the deposi...

Embodiment 2

[0040]A 90-ton electric furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, Φ4.0mm welding wire is produced. . The chemical composition of the welding wire is calculated by weight percentage: C 0.083, Si 0.32, Mn 1.58, Ni1.55, Mo 0.38, Ti 0.08, V 0.03, Cr 0.28, B 0.003, S 0.003, P 0.013, and the balance is iron and unavoidable impurities. The surface is copper-plated after being drawn into welding wire, and the copper content of the welding wire is 0.12%.

[0041] The above-mentioned Φ4.0mm welding wire is used together with SJ101G flux to conduct the mechanical property test of the deposited metal according to GB / T12470-2003. The base metal is X100. The welding specification is: welding current 500A, welding voltage 29V, welding speed 25±1.5cm / min, The interlayer temperature is 150±15°C, the tensile strength of the dep...

Embodiment 3

[0051] A 90-ton electric furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, Φ4.0mm welding wire is produced. . The chemical composition of the welding wire is calculated by weight percentage: C 0.063, Si 0.32, Mn 1.36, Ni1.42, Mo 0.26, Ti 0.06, V 0.02, Cr 0.18, B 0.002, S 0.002, P 0.010, the balance is iron and unavoidable impurities. The surface is copper-plated after being drawn into welding wire, and the copper content of the welding wire is 0.12%.

[0052] The above-mentioned Φ4.0mm welding wire is used together with SJ101G flux to conduct the mechanical property test of the deposited metal according to GB / T12470-2003. The base metal is X100. The welding specification is: welding current 500A, welding voltage 29V, welding speed 25±1.5cm / min, The interlayer temperature is 150±15°C, the tensile strength of the deposi...

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Abstract

The invention discloses a submerged arc welding wire of a high tensile pipeline steel. The welding wire material comprises the following chemical components in percentage by weight: not more than 0.10 of C, not more than 0.6 of Si, 1.3-1.8 of Mn, 1.4-2.5 of Ni, 0.25-0.55 of Mo, not more than 0.12 of Ti, not more than 0.05 of V, not more than 0.35 of Cr, 0.0005-0.005 of B, not more than 0.015 of S, not more than 0.015 of P, and the balance of Fe and other inevitable impurities. The submerged arc welding wire of the high tensile pipeline steel provided by the invention has the yield strength of deposited metals of more than 690MPa and the tensile strength of more than 785Mpa, has attractive welding formation, high intensity, high flexibility and high crack resistance without defects of cracking, undercut and the like, and has favorable matching effect with X100 level pipeline steel plates, and meets the requirement on the welding of oil-gas transmission pipelines under the condition of higher pressure.

Description

technical field [0001] The invention relates to a submerged arc welding wire for metal material welding, in particular to a high-strength pipeline steel submerged arc welding wire for welding oil and gas pipelines. Background technique [0002] The use of high-grade steel for long-distance oil and gas pipelines has good economic benefits. In recent years, the application of X100 grade pipeline steel plates in long-distance natural gas pipelines has been increasing in the world. The steel pipes have good toughness, high strength, high elongation, can withstand large stresses, and have good earthquake resistance and air tightness. Due to the high strength and high toughness of the steel pipe, it is required that the matching welding wire should also have corresponding strength and high toughness. However, the existing welding materials can not meet the requirements of X100 pipeline steel plate. Contents of the invention [0003] The technical problem to be solved by the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/18B23K101/10
Inventor 戴敦乐
Owner YICHANG MONKEY KING WELDING WIRE
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