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Full-position high-toughness self-protection flux-cored welding wire

A technology of flux-cored welding wire and self-protection, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of weld metal toughness and plasticity reduction, poor welding effect, and difficult slag removal, etc., and achieve excellent Toughness and plasticity, small spatter, good all-position welding performance

Active Publication Date: 2009-10-21
HEBEI YICHEN INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of strong deoxidizing, decarburizing agents, and some fluorides that protect the arc from air intrusion are added to the usual formula, resulting in poor all-position welding effect, large spatter, and difficult slag removal, and a large amount of residual Al elements will make welding The toughness and plasticity of seam metal are significantly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] BaF 2 : 15%

[0030] LiF: 3%

[0031] CaF 2 : 6%

[0032] Al: 6%

[0033] Mg: 18%

[0034] SiO 2 : 5.5%

[0035] CaCO 3 :8%

[0036] TiO 2 : 6%

[0037] Mn: 6%

[0038] Ni: 4.5%

[0039] Fe: 22%

[0040] This welding wire has good all-position welding performance, stable arc combustion, small spatter, which is fine particle spatter, smooth and bright weld seam, no porosity, easy slag removal, elongation: 30%, A kv (-30°C): 140J.

Embodiment 2

[0042] BaF 2 : 10%

[0043] LiF: 2%

[0044] CaF 2 : 4%

[0045] Al: 3%

[0046] Mg: 16%

[0047] SiO 2 : 5%

[0048] CaCO 3 : 7%

[0049] TiO 2 :8%

[0050] Mn: 4%

[0051] Ni: 5.5%

[0052] Fe: 35.5%

[0053] This welding wire has good all-position welding performance, stable arc combustion, small spatter, which is fine particle spatter, smooth and bright weld seam, no porosity, easy slag removal, elongation: 29%, A kv (-30°C): 115J.

Embodiment 3

[0055] BaF 2 : 16%

[0056] LiF: 3%

[0057] CaF 2 : 6%

[0058] Al: 5.5%

[0059] Mg: 12%

[0060] SiO 2 : 4%

[0061] CaCO 3 : 4.5%

[0062] TiO 2 : 6%

[0063] Mn: 3.8%

[0064] Ni: 6%

[0065] Fe: 33.2%

[0066] This welding wire has good all-position welding performance, stable arc combustion, small spatter, which is fine particle spatter, smooth and bright weld seam, no porosity, easy slag removal, elongation: 28%, A kv (-30°C): 90J.

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Abstract

The invention relates to a self-protection flux-cored welding wire for full-position and high-toughness welding. A flux core comprises the following components in percentage by weight: 2 to 7 percent of Mn, 3 to 6 percent of Ni, 1 to 10 percent of Al, 1 to 20 percent of Mg, 1 to 10 percent of carbonate, 10 to 60 percent of fluoride, 0.5 to 8 percent of TiO2, 0.5 to 6 percent of SiO3, and the balance of iron powder; and the flux core accounts for 16 to 30 percent of the total weight of the welding wire. The self-protection flux-cored welding wire has the advantages of good toughness and plasticity of weld metals, little splash and good full-position welding performance, and remarkably improves the slag detachability and weld formation property.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a flux-cored welding wire. Background technique [0002] Self-shielded flux-cored wire has many advantages that gas-shielded wire does not have, such as easy operation, low overall cost, strong wind resistance, good welding process performance, and good quality of welded joints, so it has been widely used. A large amount of strong deoxidizing, decarburizing agents, and some fluorides that protect the arc from air intrusion are added to the usual formula, resulting in poor all-position welding effect, large spatter, and difficult slag removal, and a large amount of residual Al elements will make welding The toughness and plasticity of the seam metal are significantly reduced. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a kind of self-shielding flux-cored wire weld me...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 胡合斌
Owner HEBEI YICHEN INDAL GROUP