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TC4 titanium alloy submerged-arc welding flux and preparation method and application thereof

A submerged arc flux, titanium alloy technology, applied in arc welding equipment, welding equipment, welding equipment and other directions, can solve the problems of poor side wall fusion, coarsening of microstructure and grains, slag inclusion in pores, etc., to improve arc stability, The effect of reducing the generation of hydrogen-induced cracks and increasing the basicity of the flux

Inactive Publication Date: 2022-04-01
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the filling welding of TC4 titanium alloy thick-walled components mostly adopts MIG shielded welding and laser wire filling welding. The multi-layer welding process not only restricts the substantial improvement of its efficiency, but also increases the probability of welding defects due to the multi-pass filling during the welding process, and at the same time, repeated heating will also cause the grain coarsening of the structure
In addition, ultra-narrow gap welding technology will also cause defects such as poor fusion of side walls, pore slag inclusions, etc., and put forward higher requirements for welding equipment and processes

Method used

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  • TC4 titanium alloy submerged-arc welding flux and preparation method and application thereof
  • TC4 titanium alloy submerged-arc welding flux and preparation method and application thereof
  • TC4 titanium alloy submerged-arc welding flux and preparation method and application thereof

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Embodiment 1

[0025] Embodiment 1: a kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared by binder and powder, and wherein powder is made of BaCl by mass fraction 2 : 4.5%, LiF: 2.0%, NaF: 4.9% and the balance of CaF 2 Mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the ratio of potassium to sodium is 3:1, the mass fraction of the binder in the flux is 4%, and the powder The mass percentage content of H is ≤0.003%, the mass percentage content of N is ≤0.005%, the mass percentage content of O is ≤0.010%, the mass percentage content of S is ≤0.003%, and the mass percentage content of P is ≤0.003%.

[0026] Described flux preparation method is carried out as follows:

[0027] Step 1: Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;

[0028] Step 2: Dry the mixture obtained in step 1 at low temper...

Embodiment 2

[0029] Embodiment 2: a kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared from binder and powder, wherein powder is made of BaCl by mass fraction 2 : 5%, LiF: 2.1%, NaF: 5.1% and balance CaF 2 Mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the ratio of potassium to sodium is 3:1, the mass fraction of the binder in the flux is 4%, and the powder The mass percentage content of H is ≤0.003%, the mass percentage content of N is ≤0.005%, the mass percentage content of O is ≤0.010%, the mass percentage content of S is ≤0.003%, and the mass percentage content of P is ≤0.003%.

[0030] Described flux preparation method is carried out as follows:

[0031] Step 1: Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;

[0032] Step 2: Dry the mixture obtained in step 1 at low temperature at 20...

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Abstract

The invention discloses a TC4 titanium alloy submerged-arc welding flux and a preparation method and application thereof. The invention belongs to the technical field of welding materials. The invention provides a TC4 titanium alloy submerged-arc welding flux and a preparation method and application thereof. The flux is prepared from an adhesive and powder, wherein the powder is formed by mixing the following components in percentage by mass: 4.5%-5.5% of BaCl2, 1.8%-2.1% of LiF, 4.8%-5.1% of NaF and the balance of CaF2. The method comprises the following steps: step 1, mixing and dry-stirring the raw material powder according to the powder ratio, then adding the adhesive, and continuously stirring to obtain a mixture; and 2, the mixture obtained in the step 1 is subjected to low-temperature drying, high-temperature sintering and sieving after being cooled to the room temperature, and the TC4 titanium alloy submerged-arc welding flux is obtained. The welding flux is matched with a TC4 titanium alloy submerged-arc welding wire for submerged-arc welding. According to the flux, the proportion of all the components of the flux is scientifically adjusted, and the viscosity, the surface tension and the fluidity of slag are optimized. And when the alloy is matched with a TC4 titanium alloy submerged-arc welding wire for submerged-arc welding, the alloy has good welding process performance and mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a TC4 titanium alloy submerged arc welding flux and a preparation method and application thereof. Background technique [0002] TC4 titanium alloy is an important structural material, because of its excellent comprehensive properties (low density, high specific strength, stable corrosion resistance and high temperature resistance, etc.), it is widely used in aerospace, deep submersibles and weaponry and other fields . At present, the filling welding of TC4 titanium alloy thick-walled components mostly adopts MIG shielded welding and laser wire filling welding. The multi-layer welding process not only restricts the substantial improvement of its efficiency, but also increases the probability of welding defects due to the multi-pass filling during the welding process, and at the same time, repeated heating will also cause the grain coarsening of the structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40B23K9/18
CPCB23K35/40B23K35/32B23K9/18
Inventor 徐锴冯伟郭枭黄瑞生贾立超尹立孟邹吉鹏武鹏博陈玉华方乃文
Owner HARBIN WELDING INST LTD
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