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A supersonic flame spraying type flux-cored welding wire and its preparation method

A technology of supersonic flame and flux-cored wire, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of unfavorable molten pool gas escape, many pores on the surface of the weldment, and unsatisfactory performance, and achieve simple structure , Welding spatter is small, the effect of welding speed is fast

Active Publication Date: 2016-01-06
NINGBO LONGXING WELDING CUTTING TECH STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flux-cored wire can be welded at high speed, the welding speed of the high-speed flux-cored wire is not enough to meet the current welding needs, and the efficiency is relatively low; and the TiO2 in the flux-cored wire formula 2 The content is high, the slag shell is thick after welding, which is not conducive to the escape of gas in the molten pool, the surface of the weldment has many pores, the welding wire deposition speed is slow, and the performance is not very ideal

Method used

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  • A supersonic flame spraying type flux-cored welding wire and its preparation method
  • A supersonic flame spraying type flux-cored welding wire and its preparation method
  • A supersonic flame spraying type flux-cored welding wire and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, the powder was weighed according to the powder and parts by weight of the drug core powder in Example 1 in Table 2, and the powder was sieved once through an 80-mesh sieve and then fully mixed to prepare the drug core powder. According to the composition and mass percentage of the steel strip in Example 1 in Table 1, the thickness is 0.5mm, and the steel strip with a width of 260mm is rolled into a U-shaped groove structure, and in the U-shaped groove, add 17% of flux-cored wire gross weight The medicine core powder prepared above. Then use a molding machine to close the U-shaped groove and form a through hole through the steel strip along the axial direction of the steel strip, and the drug core powder is wrapped in the through hole. Finally, the steel strip wrapped with flux core powder is drawn and reduced one by one by a wire drawing machine to make the diameter reach 1.2mm, and the final product supersonic flame sprayed flux cored wire is obtained.

Embodiment 2

[0043] First, the powder was weighed according to the powder and parts by weight of the drug core powder in Example 2 in Table 2, and the powder was screened once through a 100-mesh sieve and then fully mixed to prepare the drug core powder. According to the composition and mass percentage of the steel strip in Example 2 in Table 1, the thickness is 0.6mm, and the steel strip with a width of 280mm is rolled into a U-shaped groove structure, and in the U-shaped groove, add 18% of flux-cored wire gross weight The medicine core powder prepared above. Then use a molding machine to close the U-shaped groove and form a through hole through the steel strip along the axial direction of the steel strip, and the drug core powder is wrapped in the through hole. Finally, the steel strip wrapped with flux core powder is drawn and reduced in diameter through a wire drawing machine, so that its diameter reaches 1.3 mm, and the final product supersonic flame sprayed flux cored wire is obtaine...

Embodiment 3

[0045] First, the powder was weighed according to the powder and parts by weight of the drug core powder in Example 3 in Table 2, and the powder was screened twice through a 120-mesh sieve and then fully mixed to prepare the drug core powder. According to the composition and mass percentage of the steel strip in Example 3 in Table 1, the thickness is 0.7mm, and the steel strip with a width of 300mm is rolled into a U-shaped groove structure, and in the U-shaped groove, add 19% of flux-cored wire gross weight The medicine core powder prepared above. Then use a molding machine to close the U-shaped groove and form a through hole through the steel strip along the axial direction of the steel strip, and the drug core powder is wrapped in the through hole. Finally, the steel strip wrapped with flux core powder is drawn and reduced one by one by a wire drawing machine, so that its diameter reaches 1.4mm, and the final product supersonic flame sprayed flux cored wire is obtained.

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Abstract

The invention relates to a supersonic-speed flame spraying type flux-cored wire and a preparation method of the supersonic-speed flame spraying type flux-cored wire. The flux-cored wire comprises a cylindrical cover made of a steel strip, a through hole which penetrates through the outer cover along the axis is formed in the outer cover, and the through hole is filled with core powder which comprises, by weight, 45-60 parts of metal powder, 40-50 parts of alloyed powder and 8-18 parts of mineral powder. The preparation method includes the steps that firstly, core powder is prepared, meanwhile, the steel strip is rolled to be of a U-shaped groove structure, and the core powder accounting for, by weight, 17%-19% the flux-cored wire is added into the U-shaped groove; then, the through hole penetrating through the steel strip is formed in the axial direction of the steel strip after the opening of the U-shaped groove is closed through a forming machine, wherein the core powder is wrapped in the through hole; finally, line-by-line drawing and diameter reduction are carried out on the steel strip through a drawing machine so as to obtain the supersonic-speed flame spraying type flux-cored wire. The supersonic-speed flame spraying type flux-cored wire prepared through method is high in welding speed and high in efficiency, little spatter occurs in the welding process, weld formation is good, the amount of welding fume is small, the amount of produced welding slag on the surface of a weld layer is small, and weldments are free of pits or pores.

Description

technical field [0001] The invention relates to a flux-cored welding wire and a preparation method thereof, in particular to a supersonic flame spraying type flux-cored welding wire and a preparation method thereof. Background technique [0002] Flux-cored welding wire is the fourth-generation most advanced welding material in the world. It is a high-tech product in the contemporary welding field. Automation, automation and intelligent welding, etc. Therefore, flux-cored wire is widely used in shipbuilding, construction, bridge, machinery manufacturing, metallurgy and mining industries. [0003] At present, the production process of domestic flux-cored welding wire is basically mature, but in terms of the quality of flux-cored welding wire, domestic products are far behind those of developed countries. Due to the unreasonable ratio of various ingredients in the formula of ordinary flux-cored welding wire, the amount of slag generated on the surface of the weld seam of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/22B23K35/40
CPCB23K35/0266B23K35/3073B23K35/368B23K35/406
Inventor 邬剑敏赵善军
Owner NINGBO LONGXING WELDING CUTTING TECH STOCK
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