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High-toughness verylow hydrogen basic Co2 Cored welding wire

A flux-cored wire, high toughness technology, used in welding media, welding equipment, welding equipment and other directions, can solve the problems of low diffusible hydrogen content, difficult to complete vertical welding, horizontal welding, poor operating process performance, etc. Good coverage, excellent welding process performance, easy slag removal

Inactive Publication Date: 2006-08-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's shipbuilding industry has used a large number of flux-cored welding wires. The welding objects are mainly ordinary hull steels with a tensile strength below 490MPa. Almost all of the welding wires used are acidic flux-cored welding wires of titanium slag series. Said that the welding consumables are now required to have high strength and high toughness, and the welding core is required to have a low diffusible hydrogen content. Therefore, generally speaking, the welding of high-strength steel mainly uses low-hydrogen flux-cored wire of the alkaline slag system, but this Kind of welding wire in CO 2 When used as a shielding gas, the operating process performance is extremely poor, and it is difficult to complete welding in vertical welding and horizontal welding positions

Method used

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Effect test

Embodiment 1

[0017] The composition and weight percent of the drug core of the present invention are: BaCO 3 8. MgO 17 , CaF 2 10. SiO2 2 7. Na 2 SiF 6 6. Al-Mg 4. TiO 2 12. ReF 3, ferrosilicon 8, ferrosilicon 5, nickel powder 8, manganese powder 4, iron powder 8; the filling rate is 11%.

Embodiment 2

[0019] The composition and weight percent of the drug core of the present invention are: BaCO 3 10. MgO25, CaF 2 6. SiO2 2 4. Na 2 SiF 6 15. Al-Mg 3 , TiO 2 8. ReF 1.5, ferrosilicon 8, ferrosilicon 7, nickel powder 8, manganese powder 4; the filling rate is 18%.

Embodiment 3

[0021] The composition and weight percent of the drug core of the present invention are: BaCO 3 4. MgO 15 , CaF 2 12. SiO2 2 10. Na 2 SiF 6 10.5, Al-Mg 5, TiO 2 17. ReF 0.5, ferro-titanium 5, ferrosilicon 3, ferro-molybdenum 2, nickel powder 8, manganese powder 4, iron powder 4; the filling rate is 14%.

[0022]

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PUM

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Abstract

The invention belongs to the field of welding material, putting a high toughness and low hydrogen alkaline CO2 welding wire using general 08Al strip as skin, pulled intoa small diameter rolling 1.2-1.6mm, cored alkaline slag and a large amount of deoxidizer and alloying added, the proportion of the filler is 11-18%, the main components and weight percentages are: BaCO3 4-10, MgO 15-25, CaF2 6-12, Na2SiF6 6-15,SiO2 4-10,TiO28-17,ReF 0.3-3,Al-Mg 3-5,10-15 iron added, pure metal powder 12-20,the invention of the alkaline welding wire use pure CO2 as a protective gas, which has s excellent welding properties. It can be conducted plate, grounding upward welding, established downward welding, welding and other horizontal position welding.

Description

Technical field [0001] The invention belongs to the technical field of welding materials, and mainly proposes a CO welding material with high toughness and extremely low hydrogen content. 2 Basic flux cored wire. Background technique [0002] my country's shipbuilding industry has used a large number of flux-cored welding wires. The welding objects are mainly ordinary hull steels with a tensile strength below 490MPa. Almost all of the welding wires used are acidic flux-cored welding wires of titanium slag series. Said that the welding consumables are now required to have high strength and high toughness, and the welding core is required to have a low diffusible hydrogen content. Therefore, generally speaking, the welding of high-strength steel mainly uses low-hydrogen flux-cored wire of the alkaline slag system, but this Kind of welding wire in CO 2 When used as a shielding gas, the operating process performance is extremely poor, and it is difficult to complete welding in v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K9/16
Inventor 吴伦发张成杰王明林王君民
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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