Submerged arc sintered flux and production method thereof

A technology of sintered flux and production method, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of easy occurrence of transverse cracks and terminal cracks, untimely after-sales service, long order cycle, etc., and achieve transition Effects of smoothness, cost reduction, and productivity improvement

Inactive Publication Date: 2012-09-05
上海纪好旺造船科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For domestic shipyards, there are many problems in using imported FCB welding consumables: first, the price is very high; second, the order cycle is long; third, after-sales service is not timely, etc.
In terms of process performance, the existing imported FCB welding consumables are prone to transverse cracks and terminal cracks when welding medium-thickness high-strength steel plates

Method used

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  • Submerged arc sintered flux and production method thereof
  • Submerged arc sintered flux and production method thereof
  • Submerged arc sintered flux and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Flux: multi-wire single-sided welding submerged arc sintering flux, its chemical composition (mass percentage):

[0031] Upper Surface Flux:

[0032] CaO 8%, MgO 17%, Al 2 o 3 11%, MnO 4%, SiO 2 12%, TiO 2 8%, Fe 2 o 3 36%, rare earth ferrosilicon 2%, ferro-titanium 1%, borax 0.5%, ferromanganese 0.5%;

[0033] Pad flux:

[0034] CaO 18%, MgO 33%, Fe 2 o 3 7%, MnO 12%, SiO 2 18%, TiO 2 8%, Na 2 O 4%.

Embodiment 2

[0036] Flux, its chemical composition (mass percentage):

[0037] Upper Surface Flux:

[0038] CaO 5%, MgO 20%, Al 2 o 3 7%, MnO 6%, SiO 2 10%, TiO 2 10%, Fe 2 o 3 38%, rare earth ferrosilicon 2%, ferro-titanium 1%, borax 0.5%, ferromanganese 0.5%;

[0039] Pad flux:

[0040] CaO 15%, MgO 35%, Fe 2 o 3 5%, MnO 15%, SiO 2 15%, TiO 2 10%, Na 2 O 5%.

Embodiment 3

[0042] Flux, its chemical composition (mass percentage):

[0043] Upper Surface Flux:

[0044] CaO 10%, MgO 15%, Al 2 o 3 14%, MnO 3%, SiO 2 15%, TiO 2 5%, Fe 2 o 3 34%, rare earth ferrosilicon 2%, ferrotitanium 1%, borax 0.5%, ferromanganese 0.5%;

[0045] Pad flux:

[0046] CaO 20%, MgO 30%, Fe 2 o 3 10%, MnO 10%, SiO 2 20%, TiO 2 5%, Na 2 O 5%.

[0047] Adopt FCB method special welding wire of the present invention, its chemical composition is shown in Table 1;

[0048] Table 1 Chemical Composition of Welding Wire (%)

[0049] C

Si

mn

S

P

Cu

0.055

0.021

0.60

0.019

0.014

＜0.05

[0050] Test plate: high-strength marine steel plate DH32, thickness 20mm, see Table 2 for its chemical composition.

[0051] Table 2 DH32 chemical composition

[0052] C

Si

mn

S

P

Cu

0.12

0.35

1.10

0.020

0.023

＜0.05

...

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Abstract

The invention relates to a hull building high efficiency welding process, and a welding technique for flux copper liner multi-filament single side automatic submerged arc welding, in particular to an automatic submerged arc welding sintered flux comprising a top surface flux and a liner flux and a production method thereof. The submerged arc sintered flux consists of the top surface flux and the liner flux. The top surface flux comprises the following components: 5 to 10 percent of CaO, 15 to 20 percent of MgO, 7 to 14 percent of Al2O3, 3 to 6 percent of MnO, 10 to 15 percent of SiO2, 5 to 10percent of TiO2, 34 to 38 percent of Fe2O3, 2 percent of rare earth ferrosilicon, 1 percent of ferrotitanium, 0.5 percent of borax, and 0.5 percent of ferromanganese; and the liner flux comprises the following components: 15 to 20 percent of CaO, 30 to 35 percent of MgO, 5 to 10 percent of Fe2O3, 10 to 15 percent of MnO, 15 to 20 percent of SiO2, 5 to 10 percent of TiO2, and 4 to 5 percent of Na2O.

Description

Technical field: [0001] The invention relates to a high-efficiency welding process for hull construction, a welding technology for multi-wire single-sided submerged arc automatic welding of flux copper pads, in particular to a submerged arc automatic welding sintering flux comprising upper surface flux and pad flux and a production method thereof. Background technique: [0002] With the increase of the tonnage of ships, a large number of segmented construction methods are used in hull construction. In the past, submerged arc automatic single-sided welding was used for splicing ship plates. However, due to the increase in plate thickness and joint length, the weight and occupied area of ​​the segments also increased. Difficult, and there are high requirements for the height of the factory building and the number of lifting equipment. At the same time, the efficiency of double-sided welding is low, and it takes a long time to occupy a station. It is difficult to meet the fast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362
Inventor 忻鼎乾杨华王欢余圣甫沈立
Owner 上海纪好旺造船科技发展有限公司
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