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High-strength and high-toughness submerged arc horizontal welding agent and preparing method and application thereof

A high-strength, high-toughness, flux technology, used in arc welding equipment, welding equipment, welding equipment, etc., can solve problems such as excessive molten iron fluidity, dripping molten iron, and inability to fill K-shaped grooves.

Active Publication Date: 2019-07-26
TIANJIN YONGCHANG WELDING WIRES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, under the horizontal welding process, the fluidity of the molten iron and the viscosity of the slag shell are more stringent. The fluidity of the molten iron is poor, and it cannot fill the K-shaped groove. The fluidity of the molten iron is too good, and it is prone to dripping

Method used

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  • High-strength and high-toughness submerged arc horizontal welding agent and preparing method and application thereof
  • High-strength and high-toughness submerged arc horizontal welding agent and preparing method and application thereof
  • High-strength and high-toughness submerged arc horizontal welding agent and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) The parts by weight of various raw materials in the flux powder are as follows: (parts)

[0051]

[0052] (2) Submerged arc welding flux is made according to the above ingredients, according to the national standard GB / T 36034-2018 "High-strength steel solid welding wire, flux-cored welding wire and welding wire-flux classification combination requirements for submerged arc welding" and GB / T47018-2017 Welding Materials Ordering Specifications for Pressure Equipment" is used to inspect the content of sulfur and phosphorus in flux and deposited metal, test the mechanical properties of deposited metal, as well as ray flaw detection of deposited metal and bend test of deposited metal.

[0053] According to the above standard, the welding test is carried out with H08MnMoA welding wire with a diameter of 4.0mm for pressure. The final indicators are as follows.

[0054] ① Flux sulfur and phosphorus content:

[0055]

[0056] ② content of sulfur and phosphorus in de...

Embodiment 2

[0064] (1) The parts by weight of various raw materials in the flux powder are as follows: (parts)

[0065]

[0066] (2) The submerged arc welding flux prepared according to the above components is also tested according to the specifications of Example 1. The final indicators are as follows.

[0067] ① Flux sulfur and phosphorus content:

[0068]

[0069] ② content of sulfur and phosphorus in deposited metal

[0070]

[0071] ③Mechanical properties of deposited metal

[0072]

[0073] ④ Radiographic flaw detection inspection: After X-ray flaw detection, the quality level is first grade.

[0074] ⑤Longitudinal bending test: both face bending and back bending are qualified.

[0075] (3) After the finished product, the particle size of the flux powder is 30-60 mesh, and the particle size of 40-50 mesh accounts for 60%.

Embodiment 3

[0077] (1) The parts by weight of various raw materials in the flux powder are as follows: (parts)

[0078]

[0079] (2) The submerged arc welding flux prepared according to the above components is also tested according to the specifications of Example 1. The final indicators are as follows.

[0080] ① Flux sulfur and phosphorus content:

[0081]

[0082] ② content of sulfur and phosphorus in deposited metal

[0083]

[0084] ③Mechanical properties of deposited metal

[0085]

[0086] ④ Radiographic flaw detection inspection: After X-ray flaw detection, the quality level is first grade.

[0087] ⑤Longitudinal bending test: both face bending and back bending are qualified.

[0088] (3) After the finished product, the particle size of the flux powder is 30-60 mesh, and the particle size of 40-50 mesh accounts for 58%.

[0089] In order to reflect the effect between the various raw materials, the comparison ratio of the content of special elements that do not mee...

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Abstract

The invention provides a high-strength and high-toughness submerged arc horizontal welding agent and a preparing method and application thereof. The high-strength and high-toughness submerged arc horizontal welding agent comprises welding agent powder and a bonding agent. The welding agent powder comprises following components including, by weight, 20-25 parts of magnesium oxide, 9-15 parts of calcium oxide, 25-30 parts of aluminum oxide, 15-20 parts of barium fluoride, 5-10 parts of electrolytic manganese metal, 8-12 parts of silicon mud and 1.5-2.5 parts of nickel powder. According to the high-strength and high-toughness submerged arc horizontal welding agent, the submerged arc welding agent is adopted, the deposited metal tensile strength reaches 620 MPa, the low-temperature ballistic work is high, the high-strength and high-toughness submerged arc horizontal welding agent is specially used for horizontal welding, deslagging is easy, forming is attractive, and the welding quality can be guaranteed.

Description

technical field [0001] The invention belongs to the field of flux in welding materials, and in particular relates to a high-strength and high-toughness submerged arc transverse welding flux and its preparation method and application. The strength of the deposited metal of the flux is 60kg, and the low-temperature toughness index is -30°C>50J. Background technique [0002] With the rapid development of the pressure storage tank industry, storage tank materials are improving day by day. Now the tensile strength of pressure storage tanks has gradually increased. There are already high-strength storage tanks using 12MnNiDR steel plates as the main material, which also makes the matching The performance requirements of horizontal welding consumables are improved. Moreover, under the horizontal welding process, the fluidity of molten iron in the weld and the viscosity of the slag shell are more stringent. The fluidity of the molten iron is poor, and it cannot fill the K-shaped ...

Claims

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Application Information

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IPC IPC(8): B23K35/362B23K35/40B23K9/18
CPCB23K35/362B23K35/40B23K9/18
Inventor 侯云昌陈洋郝旭晨刘昕邢俊英赵娜
Owner TIANJIN YONGCHANG WELDING WIRES
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