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800mpa grade weathering steel supporting welding rod for bridge and production method thereof

An 800mpa, weather-resistant steel technology, applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of large welding spatter, low coefficient of atmospheric corrosion resistance, high cost, etc., and achieve excellent weld metal properties, good Process performance, the effect of improving mechanical properties

Active Publication Date: 2019-10-11
SICHUAN XIYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The 800MPa grade weathering steel supporting welding rods for bridges in the existing market, on the one hand, the cost of importing from abroad is high and the cycle is long; , poor weld formation, poor slag removal performance, low atmospheric corrosion resistance coefficient and other disadvantages
And it is difficult to achieve the best welding process performance and mechanical properties at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Get the coating, the components of the coating and their mass fractions are as follows: marble: 29.4%, fluorite: 30%, rutile: 7%, ferromolybdenum: 2.0%, metal chromium: 2.0%, silicon micropowder: 5.0%, silicon Iron: 4.0%, nickel powder: 4.2%, soda ash: 0.5%, CMC: 0.6%, electrolytic manganese: 5.2%, reduced iron powder: 8.0%, titanium iron: 1.5%, copper powder: 0.6%.

[0030] Take the welding core, the welding core is selected from H08GX welding core with low content such as sulfur, phosphorus, arsenic and aluminum, and the chemical composition mass percentage is: C: ≤0.10%; Mn: 0.30-0.55%; Si: ≤0.08%; S: ≤0.015%; P:≤0.005%;

[0031] Cr: ≤0.10%; Ni: ≤0.30%; Al: ≤0.03%; Cu: ≤0.20%; As: ≤0.02%; the balance is Fe.

[0032] After mixing the components of the coating raw material evenly, add 41.5-42° Be"d potassium sodium water glass accounting for 19-24% of the mass content of the solid component to prepare a paste for the coating. Process Electrode preparation is carried ...

Embodiment 2

[0035] Get the coating, the components of the coating and their mass fractions are as follows: marble: 26.7%, fluorite: 27.2%, rutile: 6%, ferromolybdenum: 2.2%, metal chromium: 2.1%, silicon micropowder: 6.0%, silicon Iron: 4.0%, nickel powder: 5.2%, soda ash: 0.6%, CMC: 0.8%, electrolytic manganese: 5.9%, reduced iron powder: 11.0%, titanium iron: 1.5%, copper powder: 0.8%.

[0036] Take the welding core, the welding core is selected from H08GX welding core with low content such as sulfur, phosphorus, arsenic and aluminum, and the chemical composition mass percentage is: C: ≤0.10%; Mn: 0.30-0.55%; Si: ≤0.08%; S: ≤0.015%; P:≤0.005%;

[0037] Cr: ≤0.10%; Ni: ≤0.30%; Al: ≤0.03%; Cu: ≤0.20%; As: ≤0.02%; the balance is Fe.

[0038] After mixing the components of the coating raw material evenly, add 41.5-42° Be"d potassium sodium water glass accounting for 19-24% of the mass content of the solid component to prepare a paste for the coating. Process Electrode preparation is carri...

Embodiment 3

[0041] Get the coating, the components of the coating and their mass fractions are as follows: marble: 30.5%, fluorite: 26%, rutile: 5%, ferromolybdenum: 2.1%, metal chromium: 2.1%, silicon micropowder: 5.0%, silicon Iron: 4.0%, nickel powder: 6.0%, soda ash: 0.5%, CMC: 0.6%, electrolytic manganese: 6.2%, reduced iron powder: 9.0%, titanium iron: 2.0%, copper powder: 1.0%.

[0042] Take the welding core, the welding core is selected from H08GX welding core with low content such as sulfur, phosphorus, arsenic and aluminum, and the chemical composition mass percentage is: C: ≤0.10%; Mn: 0.30-0.55%; Si: ≤0.08%; S: ≤0.015%; P:≤0.005%;

[0043] Cr: ≤0.10%; Ni: ≤0.30%; Al: ≤0.03%; Cu: ≤0.20%; As: ≤0.02%; the balance is Fe.

[0044] After mixing the components of the coating raw material evenly, add 41.5-42° Be"d potassium sodium water glass accounting for 19-24% of the mass content of the solid component to prepare a paste for the coating. Process Electrode preparation is carried ...

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Abstract

The invention discloses a matched electrode of 800 MPa-grade weathering steel for a bridge and a production method of the matched electrode. The electrode is mainly composed of an H08GX core wire and a coating wrapping the surface of the core wire, and is characterized in that the coating comprises, by weight, 20.0-35.0% of marble, 25.0-40.0% of fluorite, 4.0-9.0% of rutile, 1.8-2.5% of ferromolybdenum, 1.8-2.5% of chromium metal, 3.0-8.0% of silica powder, 2.0-4.0% of silicon iron, 4.0-6.0% of nickel powder, 0.4-0.8% of sodium carbonate, 0.4-0.8% of CMC, 5.2-6.2% of electrolytic manganese, 8.0-11.0% of reduced iron powder, 1.5-3.0% of ferrotitanium and 0.6-1.0% of copper powder. The electrode has the good processing property and the good ductility and toughness. The good effects of improving a welding structure and the mechanical property of weld seams are achieved by reasonably matching all the components of the electrode, and the good welding seam metallicity is achieved.

Description

technical field [0001] The invention relates to the technical field of welding rods, in particular to a matching welding rod for 800MPa grade weathering steel for bridges and a production method thereof. Background technique [0002] After the 1960s, attention began to be paid to the influence of environmental factors on the corrosion products on the surface of weathering steel, and the mechanism of weathering steel's resistance to atmospheric corrosion was clarified. Since the 1990s, many researchers have turned their attention to the development of new high-performance weathering steels with low cost, high strength and higher corrosion resistance, and have achieved certain results. The main characteristics of my country's development of weather-resistant steel are: the steel does not contain Ni and Cr, and mainly adds Cu or P, or Cu and P, and combines my country's rich V, Ti, Nb, Al and Re resources. [0003] In the past, the corrosion resistance factor of bridge steel w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 何秀韦性竹
Owner SICHUAN XIYE NEW MATERIAL
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