Weather-proof flux core wire used for coating-free bridge steel and preparing method of weather-proof flux core wire

A flux-cored wire, coating-free technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problem of finding no coating-free weathering bridge steel welding material, etc., to achieve stable welding arc and beautiful welding seam. , good mechanical properties

Active Publication Date: 2017-03-08
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no welding consumables that match the weather-resistant bridge steel without painting. The welded parts also need to be painted with paint after welding with existing welding consumables.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The mass percentage of each component of the drug powder core is as follows: 4% ferroboron, 0.05% ferromolybdenum, 2.5% fluoride, 2.5% zircon sand, 4% magnesium powder, 2.5% quartz sand, 5% ferrosilicon, 14% electrolytic manganese , ferromanganese 2%, nickel powder 3%, metal chromium 3%, copper powder 2%, titanium ferro 3%, feldspar 0.5%, sodium titanate 4%, rutile 40%, and the balance is iron powder.

[0040] The composition of the carbon steel strip is: C: 0.025%, Mn: 0.22%, Si: 0.0082%, S: 0.0056%, P: 0.010%, Al: 0.018%, and N: 0.0023%, and the balance is iron and impurities.

[0041] Before mixing the components of the drug powder core, each drug powder is sieved with an 80-mesh sieve, then mixed evenly according to the proportion, placed on the steel sheath, wrapped or rolled into silk and drawn Flux-cored welding wire whose diameter is reduced to a predetermined specification.

Embodiment 2

[0043] The mass percentage of each component of the drug powder core is as follows: ferroboron 4%, ferromolybdenum 0.05%, fluoride 1.5%, zircon sand 1.5%, magnesium powder 4%, quartz sand 3%, ferrosilicon 5%, electrolytic manganese 12% , ferromanganese 4%, nickel powder 3%, metal chromium 3%, copper powder 2%, titanium ferro 3%, feldspar 2%, sodium titanate 4%, rutile 35%, and the balance is iron powder.

[0044] Other steps are the same as in Example 1.

Embodiment 3

[0046]The mass percentage of each component of the drug powder core is as follows: 4% ferroboron, 0.05% ferromolybdenum, 2.5% fluoride, 1.5% zircon sand, 4% magnesium powder, 3% quartz sand, 5% ferrosilicon, 14% electrolytic manganese , ferromanganese 2%, nickel powder 3.5%, metal chromium 3%, copper powder 2.3%, titanium iron 3%, feldspar 0.5%, sodium titanate 4%, rutile 37.5%, and the balance is iron powder.

[0047] Other steps are the same as in Example 1.

[0048] The weather-resistant steel flux-cored welding wire for coating-free bridge steels implemented in 1-3, when using DC reverse welding, the arc is stable, the spatter is small, the slag is easy to remove, the weld shape is beautiful, and it is suitable for all-position welding. The deposited metal composition was: C: 0.042%, Mn: 1.17%, Si: 0.24%, S: 0.0076%, P: 0.0089%, Cr: 0.42%, Ni: 0.55%, Cu: 0.36%. The mechanical properties of the deposited metal are: yield strength Rel: 510Mpa, tensile strength Rm: 590Mpa, e...

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Abstract

The invention discloses a weather-proof flux core wire used for coating-free bridge steel and a preparing method of the weather-proof flux core wire. The weather-proof flux core wire is composed of a steel skin and a powder core. The powder core comprises, by weight percent, 2%-8% of ferro-boron, 0.01%-2% of ferromolybdenum, 1%-6% of fluoride, 1.5%-8% of zircon sand, 2%-7% of magnesium powder, 2%-5% of quartz sand, 2%-8% of silicon iron, 5%-19% of electrolytic manganese, 1%-5% of ferromanganese, 1%-6% of nickel powder, 1%-8% of chromium metal, 1%-8% of copper powder, 2%-9% of ferrotitanium, 0.1%-5% of feldspar, 2%-8% of sodium titanate, 20%-40% of rutile and the balance iron powder. Compared with the prior art, the weather-proof flux core wire is stable in welding arc and little in splashing, slag removing is easy, a welding joint is formed attractively, the weather-proof flux core wire is suitable for all-position welding, the mechanical performance of the welding joint is good, the impact toughness at the temperature of minus 40 DEG C is larger than 80 J, and very high corrosion resistance is achieved.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a weather-resistant flux-cored welding wire for coating-free bridge steel and a preparation method thereof. Background technique [0002] Ordinary steel bridges are usually painted with paint to prevent rust and corrosion. In the natural environment, the paint is easily aged by strong ultraviolet rays, temperature, humidity, precipitation, wind speed, etc. Therefore, the steel bridge needs to be repainted many times during the applicable period. Install maintenance. It increases manpower and material resources, increases the difficulty of maintenance, and the volatilization and release of organic matter in the paint destroys the natural environment. [0003] A proper amount of copper, chromium, nickel and other elements are added to the coating-free weather-resistant bridge, so that in the natural environment, the outer surface will automatically form a maintenance-free, dense a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/3073
Inventor 郭栖利蒋勇李欣雨张晓柏
Owner ATLANTIC CHINA WELDING CONSUMABLES
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