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Steel for welding titanium-containing gas shielded welding wire and production method thereof

A technology for welding steel and production methods, which is applied in the field of metallurgy, can solve the problems of large gaps in strength and toughness of welding wire welds, insufficient strength and reduction of area, etc., to improve comprehensive mechanical properties, reduce differences in strength and toughness, performance stable effect

Inactive Publication Date: 2021-02-09
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing steel for gas-shielded welding wire welding has a large gap in the strength and toughness of the welding seam compared with the base material due to insufficient strength and area shrinkage, the present invention provides a titanium-containing gas-shielded welding wire welding steel and its production method

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  • Steel for welding titanium-containing gas shielded welding wire and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A titanium-containing gas-shielded welding wire welding steel, the specification is Φ5.5mm, the chemical composition of the welding steel is as follows: C: 0.03%; Mn: 1.45%; Si: 0.80%; P : 0.012%; S: 0.008%; Cr: 0.20%; Ti: 0.12%, the balance being Fe and unavoidable impurities.

[0026] The production method of the above-mentioned titanium-containing gas-shielded welding wire welding steel includes the processes of blowing, refining, continuous casting, heating, rolling and spinning, and specifically includes the following steps:

[0027] (1) Steelmaking: In the blowing process, when the oxygen supply reaches 55% of the total oxygen supply, N 2 -Ar switching, and low-carbon ferrochromium alloying, deoxidation without silicon-aluminum-based deoxidizer, the amount of deoxidizer added is 0.3kg / t steel, and 2kg / t steel of small grain ash is added during the tapping process; in the refining process, carry out White slag making operation, white slag retention time 10min, wea...

Embodiment 2

[0032] A titanium-containing gas-shielded welding wire welding steel, the specification is Φ5.5mm, the chemical composition of the welding steel is as follows: C: 0.08%; Mn: 1.55%; Si: 0.95%; P : 0.010%; S: 0.007%; Cr: 0.10%; Ti: 0.05%, and the balance is Fe and unavoidable impurities.

[0033] The production method of the above-mentioned titanium-containing gas-shielded welding wire welding steel includes the processes of blowing, refining, continuous casting, heating, rolling and spinning, and specifically includes the following steps:

[0034] (1) Steelmaking: In the blowing process, when the oxygen supply reaches 70% of the total oxygen supply, N 2 -Ar switching, and low-carbon ferromanganese alloying, without silicon-aluminum-based deoxidizer for deoxidation, the amount of deoxidizer added is 2.5kg / t steel, and 5kg / t steel of small grain ash is added during the tapping process; in the refining process, carry out For the white slag making operation, the white slag retenti...

Embodiment 3

[0039] A titanium-containing gas-shielded welding wire welding steel, the specification is Φ5.5mm, the chemical composition of the welding steel is as follows: C: 0.05%; Mn: 1.50%; Si: 0.85%; P : 0.009%; S: 0.005%; Cr: 0.16%; Ti: 0.08%, the balance being Fe and unavoidable impurities.

[0040] The production method of the above-mentioned titanium-containing gas-shielded welding wire welding steel includes the processes of blowing, refining, continuous casting, heating, rolling and spinning, and specifically includes the following steps:

[0041] (1) Steelmaking: In the blowing process, when the oxygen supply reaches 70% of the total oxygen supply, N 2 -Ar switching, and low-carbon ferromanganese alloying, without silicon-aluminum-based deoxidizer for deoxidation, the amount of deoxidizer added is 2.0kg / t steel, and 4kg / t steel of small grain ash is added during the tapping process; in the refining process, carry out White slag making operation, white slag retention time 15min...

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Abstract

The invention relates to the technical field of metallurgy, and particularly discloses steel for welding titanium-containing gas shielded welding wire and a production method of the steel. The steel for welding the titanium-containing gas shielded welding wire includes the following chemical components in percentage by mass: 0.03% to 0.08% of C, 1.45% to 1.55% of Mn, 0.80% to 0.95% of Si, less than or equal to 0.012% of P, less than or equal to 0.008% of S, 0.10% to 0.20% of Cr, 0.05% to 0.12% of Ti, and the balance of Fe and inevitable impurities. The steel for welding the titanium-containinggas shielded welding wire disclosed by the invention has the advantages that the tensile strength is greater than or equal to 580 N / mm<2>, the elongation is greater than or equal to 40%, the shrinkage rate is greater than or equal to 75%, the strength and the section shrinkage rate are higher, the differences between the strength and the toughness of a weld joint of the welding wire and a base material are effectively reduced, and the steel can meet the use requirements of steel for welding.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a titanium-containing gas-shielded welding wire welding steel and a production method thereof. Background technique [0002] At present, gas-shielded welding technology has become one of the popular welding methods, accounting for 70% of the utilization rate in the production of engineering machinery structural parts. It has the advantages of fast welding speed, wide welding range, good welding quality, good arc ignition performance, deposition High efficiency and many other advantages. [0003] With the continuous improvement of the strength and toughness of new steel types for construction machinery, the gap between the strength and toughness of the existing welding wire welds and the base material is large, so the requirements for the steel used for gas-shielded welding wire welding are also gradually increasing, especially for welding. The lower limit of the strength of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/38C22C33/06C21C5/30C21C7/06B21B37/74
CPCB21B37/74B21B2201/06C21C5/30C21C7/0006C21C7/06C22C33/06C22C38/02C22C38/04C22C38/28C22C38/38
Inventor 张剑王宝华汪青山卢永清周海波李海豹李伟志
Owner HEBEI IRON AND STEEL