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A solid gas-shielded welding wire for high-strength and high-toughness pipeline steel

A gas-shielded welding wire, high-strength and high-toughness technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve good low-temperature impact toughness and high strength

Active Publication Date: 2016-10-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, on the one hand, high-grade pipeline steel (for example, X80 pipeline steel) has been widely used in pipeline engineering, and X90 pipeline steel has also begun industrial trial production; on the other hand, it will be widely used in pipeline construction There are still some problems in matching the gas shielded welding welding method and the gas shielded welding wire of X90 pipeline steel

Method used

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  • A solid gas-shielded welding wire for high-strength and high-toughness pipeline steel
  • A solid gas-shielded welding wire for high-strength and high-toughness pipeline steel
  • A solid gas-shielded welding wire for high-strength and high-toughness pipeline steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1-A5

[0027] Welding wire steel was smelted in a vacuum induction furnace, and processed into a solid gas-shielded welding wire with a diameter of 1.4mm through forging, hot rolling, annealing, drawing, copper plating, winding and other processes. Show.

[0028] Table 1 lists the mass percentage ratios of the chemical elements in Examples A1-A5 of this case.

[0029] Table 1. (wt%, the balance is Fe and other unavoidable impurities)

[0030] serial number

C

Si

mn

Ti

Mo

Ni

C+Mn / 10

CE*

A1

0.034

0.78

1.77

0.018

0.38

1.06

0.211

0.476

A2

0.052

0.61

1.68

0.056

0.25

1.43

0.220

0.477

A3

0.063

0.66

1.61

0.078

0.21

1.58

0.224

0.479

A4

0.069

0.54

1.53

0.092

0.18

1.71

0.222

0.474

A5

0.078

0.51

1.42

0.033

0.12

1.98

0.220

0.471

[0031] Note*: CE=C+Mn / 6+(Ni+Cu) / 15+(Cr+Mo+V) / 5

[0032] Using Ar (80%) +...

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Abstract

The invention discloses a high-strength high-toughness solid gas shielded welding wire for pipeline steel. The high-strength high-toughness solid gas shielded welding wire comprises the following chemical elements in percentage by mass: 0.03 to 0.08 percent of C, 0.50 to 0.80 percent of Si, 1.40 to 1.80 percent of Mn, 0.01 to 0.10 percent of Ti, 0.10 to 0.40 percent of Mo, 1.0 to 2.0 percent of Ni and the balance of Fe and other inevitable impurities. According to the high-strength high-toughness solid gas shielded welding wire for pipeline steel, a weld joint after welding has high strength and good low temperature impact toughness, and has the yield strength of more than 625MPa and the tensile strength of more than 695MPa; weld deposits have the impact energy of more than 150J at -20DEG C and have the impact energy of more than 100J at -40DEG C.

Description

technical field [0001] The invention relates to a welding wire, in particular to a gas shielded welding wire. Background technique [0002] Pipeline steel is used to manufacture welded pipes for oil and natural gas transmission pipelines. The transmission pipelines usually use large-diameter high-pressure transportation. This transportation method requires higher strength and higher toughness for welded pipes. In recent years, on the one hand, high-grade pipeline steel (for example, X80 pipeline steel) has been widely used in pipeline engineering, and X90 pipeline steel has also begun industrial trial production; on the other hand, it will be widely used in pipeline construction There are still some problems in matching the gas shielded welding welding method of the current X90 pipeline steel with the gas shielded welding wire. [0003] The publication number is CN101249593A, and the publication date is August 27, 2008. The Chinese patent document entitled "Gas shielded wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3066B23K35/3073
Inventor 钱伟方曹能王怀龙刘硕
Owner BAOSHAN IRON & STEEL CO LTD
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