Sintered flux for EQNiCrFe-7 strip surfacing matching and preparation method thereof

A strip surfacing and sintering flux technology, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problem of chemical composition, mechanical properties, thermal crack resistance, intergranular corrosion resistance, and welding process performance. Very poor, difficult slag removal and other problems, to achieve good welding process performance and mechanical properties, beautiful shape, easy slag removal effect

Active Publication Date: 2018-04-13
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The performance of the welding process is very poor, poor forming during the welding process, difficult slag removal, welding defects such as pits and undercuts
[0006] 2. The chemical composition, mechanical properties, thermal crack resistance and intergranular corrosion resistance of weld metal cannot meet the technical requirements of petrochemical, coal chemical, boiler, nuclear power and other equipment

Method used

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  • Sintered flux for EQNiCrFe-7 strip surfacing matching and preparation method thereof
  • Sintered flux for EQNiCrFe-7 strip surfacing matching and preparation method thereof
  • Sintered flux for EQNiCrFe-7 strip surfacing matching and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] SiO 2 6.0kg, MgO 2.0kg, Al 2 o 3 26kg, CaF 2 35.0kg, CaO 3.0kg, MnO 6.5kg, NiO 8.0kg, Cr 2 o 3 7.0kg and Nb 2 o 5 Put 4.5kg of powder in a mixer, stir and mix evenly, add 18kg of potassium silicate to mix and granulate, then bake at 150°C, sinter at 600°C, and sieve to obtain the flux product.

Embodiment 2

[0043] SiO 2 7.5kg, MgO 1.5kg, Al 2 o 3 29kg, CaF 2 30.0kg, CaO 2.0kg, MnO 6.0kg, NiO 9.0kg, Cr 2 o 3 8.0kg and Nb 2 o 5 Put 5.0kg of industrial pure powder in a mixer, stir and mix evenly, add 18kg of potassium silicate to mix and granulate, then bake at 150°C, sinter at 600°C, and sieve to obtain flux products.

Embodiment 3

[0045] SiO 2 8.0kg, MgO 2.5kg, Al 2 o 3 28kg, CaF 2 27.0kg, CaO 4.0kg, MnO 7.0kg, NiO 7.0kg, Cr 2 o 3 9.0kg and Nb 2 o 5 Put 5.5kg of industrial pure powder in a mixer, stir and mix evenly, add 18kg of potassium silicate to mix and granulate, then bake at 150°C, sinter at 600°C, and sieve to obtain flux products.

[0046] The welding flux of Example 1-3 is combined with the EQNiCrFe-7 welding strip to carry out the surfacing test on the Q345E steel plate with a thickness of 40 mm. The welding process performance is shown in Table 1; the chemical composition of the surfacing metal is shown in Table 2; the side bending, intergranular corrosion and non-destructive testing are shown in Table 3; the mechanical properties of the surfacing metal are shown in Table 4. In addition, in Table 1, evaluation √: excellent, ○: good, △: fair, ×: poor.

[0047] The surfacing welding base material used in this experiment is Q345E, and its chemical composition is: C 0.14, Mn 1.35, Si...

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Abstract

The invention discloses a sintered flux for EQNiCrFe-7 strip surfacing matching and a preparation method thereof. The flux is prepared from the following components: 6.0 to 10.0 weight parts of SiO2,1.0 to 3.0 weight parts of MgO, 25.0 to 35.0 weight parts of Al2O3, 25.0 to 40.0 weight parts of Caf2, 2.0 to 4.0 weight parts of CaO, 5.0 to 7.5 weight parts of MnO, 7.0 to 9.0 weight parts of NiO, 6.0 to 9.0 weight parts of Cr2O3 and 4.0 to 6.0 weight parts of Nb2O5. During welding, the sintered flux is stable in welding process; welding beads and a base metal as well as one welding bead and another welding bead are well fused; deslagging is facilitated; the surfaces of the welding beads are attractive, and welding lines have tidy edges; and no welding defects such as undercut, pores and cracks occur.

Description

technical field [0001] The invention relates to a sintered flux for EQNiCrFe-7 belt surfacing, in particular to a sintered flux for EQNiCrFe-7 belt surfacing and a preparation method thereof. The sintered flux for EQNiCrFe-7 belt surfacing is widely used in the surface corrosion-resistant surfacing of petrochemical, coal chemical, boiler, nuclear power and other equipment. Background technique [0002] As the country intensifies the development of petrochemical and nuclear power, nickel-based strip surfacing is more and more widely used in the manufacture of petrochemical, coal chemical, boiler, nuclear power and other equipment in my country. Compared with other methods, nickel-based strip surfacing has the advantages of high deposition efficiency, shallow molten pool, stable chemical composition and metallographic structure of deposited metal, and wide and flat weld bead. [0003] After more than ten years of rapid development in the domestic equipment manufacturing indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K35/36B23K35/40
CPCB23K35/3605B23K35/361B23K35/362B23K35/40
Inventor 杨飞李欣雨彭祺珉毛兴贵蒋勇李亚军
Owner ATLANTIC CHINA WELDING CONSUMABLES
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