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Titania-type flux-cored welding wire and preparation method thereof

A technology of titanium type flux core and welding wire, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of poor thermal crack resistance, high diffusible hydrogen content, welding hot crack, etc., and achieve good welding performance and mechanical properties. High, low welding fume effect

Inactive Publication Date: 2011-06-15
TIANJIN SAINTEAGLE WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional titanium-type flux-cored welding seam has a high content of diffused hydrogen and a large amount of dust generation, especially in the case of single-side welding and double-side forming welding with a ceramic backing. Poor ability, when the welding current of the first layer of bottoming pass>200A, it is easy to produce welding thermal cracks, which limits its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A titanium-type flux-cored welding wire is formed by filling flux into a low-alloy steel strip sheath and drawing it under the action of a lubricant: the filling rate of the flux is 12% by weight, and the flux is obtained by using the following Steps made:

[0031] (1) Weighing by weight percentage: 42% TiO 2 , 5% SiO 2 , 1% Na 2 SiF 6 , 5% Mn powder, 3% Al powder, 5% Mg powder, 0.2% B 2 o 3 , 0.4% rare earth silicon whose main components are heavy rare earth yttrium and light rare earth cerium, 0.2% Na 2 O, 0.2% K 2 O, 1% rare earth fluoride, the rest is iron powder and impurities;

[0032] (2) the Na 2 O, K 2 O, SiO 2 , B 2 o 3 and Na 2 SiF 6 Mix well, heat up to 960°C, form a glassy substance after melting, cool to room temperature and pulverize into powder, and mix with the Mn powder, Al powder, Mg powder, TiO 2 The main components are heavy rare earth yttrium and light rare earth cerium rare earth silicon, rare earth fluoride and iron powder mixed ev...

Embodiment 2

[0037] A preparation method of a titanium-type flux-cored welding wire is composed of the following steps:

[0038] (1) Preparation of flux:

[0039] ① Weighing by weight percentage: 40% TiO 2 , 3% SiO 2 , 2% Na 2 SiF 6 , 4% Mn powder, 1% Al powder, 4% Mg powder, 0.2% B 2 o 3 , 0.4% rare earth silicon whose main components are heavy rare earth yttrium and light rare earth cerium, 0.2% Na2 O, 0.2% K 2 O, 1% rare earth fluoride, 0.6% Ti iron, the rest is iron powder;

[0040] ②The Na 2 O, K 2 O, SiO 2 , B 2 o 3 and Na 2 SiF 6 Mix well, heat up to 960°C, form a glassy substance after melting, pulverize into powder, cool to room temperature, mix with the Mn powder, Al powder, Mg powder, TiO 2 The main components are heavy rare earth yttrium and light rare earth cerium, rare earth silicon, rare earth fluoride, Ti iron and iron powder are evenly mixed to form flux;

[0041] (2) Wire rolling:

[0042] The flux is set in the sheath of the low-alloy steel strip for wire...

Embodiment 3

[0049] A preparation method of a titanium-type flux-cored welding wire is composed of the following steps:

[0050] (1) Preparation of flux:

[0051] ① Weighing by weight percentage: 44% TiO 2 , 4% SiO 2 , 4% Na 2 SiF 6 , 9% Mn powder, 3% Al powder, 8% Mg powder, 0.3% B 2 o 3 , 0.5% rare earth silicon whose main components are heavy rare earth yttrium and light rare earth cerium, 0.5% Na 2 O, 0.3% K 2 O, 0.5% rare earth fluoride, 1.2% Ti iron, the rest is iron powder and impurities;

[0052] ②The Na 2 O, K 2 O, SiO 2 , B 2 o 3 and Na 2 SiF 6 Mix well, heat up to 1000°C, form a glassy substance after melting, cool to room temperature, mix with the Mn powder, Al powder, Mg powder, TiO 2 The main components are rare earth silicon of heavy rare earth yttrium and light rare earth cerium, rare earth fluoride, Ti iron and iron powder are evenly mixed to form flux;

[0053] (2) Wire rolling:

[0054] The flux is set in the sheath of the low-alloy steel strip for wire ...

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Abstract

The invention discloses a titania-type flux-cored welding wire and a preparation method thereof. The preparation method comprises the following steps: filling welding fluid in a special low alloyed steel strip sheath, primarily rolling the special low alloyed steel strip sheath into a parison tube and pulling the parison tube under the action of a lubricant. The low alloyed steel strip sheath comprises the following ingredients in percentage by mass: 0.02-0.10 C, 0.5-0.9 Si, 1.2-1.7 Mn, 0-0.01 B, 0-0.2 Ti, Cr less than or equal to 0.1 percent, Ni less than or equal to 0.1 percent, S less thanor equal to 0.02 percent, P less than or equal to 0.02 percent, N less than or equal to 60 ppm and O less than or equal to 60 ppm, and the low alloyed steel strip sheath needs annealing dehydrogenation processing at 650-750 DEG C after being coldly rolled. The lubricant comprises the following ingredients: calcium-based unsaturated fatty acid substances or sodium-based unsaturated fatty acid substances, MoS2, WS2, titanium pigment, fluorinated resin and talcum powder. The invention decelerates the welding wire to deposit metal and diffuse hydrogen (mercury method) ([H] is smaller than 5ml / 100g) and improves the crack resistance on a bottom layer with a ceramic liner, and the welding wire has the advantages of stable welding arc and weak splashing.

Description

technical field [0001] The invention relates to a titanium type flux-cored welding wire and a preparation method thereof. technical background [0002] Titanium flux-cored wire is a high-efficiency welding material with good process performance, which is widely used in shipbuilding, steel structure manufacturing and other fields. However, the traditional titanium-type flux-cored welding seam has a high content of diffused hydrogen and a large amount of dust generation, especially in the case of single-side welding and double-side forming welding with a ceramic backing. The ability is poor. When the welding current of the first layer of bottoming pass is more than 200A, it is easy to produce welding thermal cracks, which limits its use. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a welding wire that can reduce the diffusion of hydrogen, can improve the crack resistance when welding the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K35/40
Inventor 张智陈邦固
Owner TIANJIN SAINTEAGLE WELDING CO LTD
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