Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof

A technology of welding rods and welding cores, which is applied in the field of matching welding rods and preparations of Q500QE steel for bridges, can solve the problems of unsatisfactory impact temperature and welding, and achieve moderate physical and chemical properties, good comprehensive mechanical properties, and good slag removal. Effect

Active Publication Date: 2017-05-10
ATLANTIC CHINA WELDING CONSUMABLES
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The electrodes disclosed in the prior art cannot be used for the welding of Q500QE steel for bridges. As the patent application number is 201110310536.X, a kind of X70 grade pipeline steel welding electrode is disclosed, and the tensile strength of the electrode can satisfy the impact temperature. Unsatisfactory, the impact temperature is -20°C, and the impact temperature required for welding Q500QE steel for bridges is -40°C, so this electrode cannot meet the welding requirements for Q500QE steel for bridges
The patent application number is 200810046233.X, which discloses an electric welding electrode for manual welding of X80 grade steel oil and gas conveying pipes. Welding with Q500QE steel

Method used

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  • Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof
  • Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof
  • Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, the chemical composition of the solder core is (wt%): C 0.05-0.10wt%, Mn 0.05-0.20wt%, Si≤0.10wt%, S≤0.015wt%, P≤0.015wt%, the balance is Fe and impurities.

[0032] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): marble 320, fluorite 300, rutile 50, soda ash 5, zircon sand 2, iron powder 200, electrolytic manganese 15, silicon Micro powder 20, ice crystal powder 15, nickel powder 7, molybdenum powder 3.

[0033] After mixing the above drug coating evenly, add 250 g of potassium sodium water glass with a concentration of 43° and stir to mix evenly, send it into the bar press and wrap it on the above-mentioned welding core with a specification of 4.0mm according to the conventional method, and then pass through the low temperature 88 ℃ baking for 2 hours, and high temperature 380 ℃ baking for 1.5 hours to obtain the electrode of this embodiment.

[0034] The welding rod obtained in this example...

Embodiment 2

[0041] The welding core composition of the embodiment is the same as that of the embodiment 1.

[0042] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): 360 marble, 280 fluorite, 80 rutile, 5 soda ash, 2 zircon sand, 300 iron powder, 18 electrolytic manganese, silicon Micro powder 15, ice crystal powder 12, nickel powder 7, molybdenum powder 3.5.

[0043] After mixing the above coatings evenly, add 250g of potassium sodium water glass with a concentration of 43°, stir and mix evenly, send it into a bar press, wrap it on a 3.2mm welding core according to the conventional method, and then bake it at a low temperature of 88°C Baking for 2 hours at a high temperature of 380°C for 1.5 hours gave the electrode of this embodiment.

[0044] The welding rod obtained in this example was subjected to a welding test (DC reverse connection welding, the welding base material was Q500QE steel for bridges), and the arc was stable, basica...

Embodiment 3

[0051] The welding core composition of the embodiment is the same as that of the embodiment 1.

[0052] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): 380 marble, 250 fluorite, 60 rutile, 5 soda ash, 2 zircon sand, 330 iron powder, 18 electrolytic manganese, silicon Micro powder 15, ice crystal powder 18, nickel powder 8, molybdenum powder 4.

[0053] After mixing the above coatings evenly, add 250g of potassium sodium water glass with a concentration of 43°, stir and mix evenly, send it into the bar press, wrap it on the 5.0mm welding core according to the conventional method, and then bake it at a low temperature of 88°C Baking for 2 hours at a high temperature of 380°C for 1.5 hours gave the electrode of this embodiment.

[0054] The welding rod obtained in this example was subjected to a welding test (DC reverse connection welding, the welding base material was Q500QE steel for bridges), and the arc was stable, basi...

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Abstract

The invention discloses an auxiliary welding rod of Q500QE steel suitable for bridge and a preparation method thereof. The auxiliary welding rod is composed of a core wire and a coating wrapped on the surface of the core wire, the compositions and the content of the coating are, by weight, 300-400 parts of marble, 200-320 parts of fluorite, 30-100 parts of rutile, 4-7 parts of sodium carbonate, 1-5 parts of zircon sand, 150-350 parts of iron powder, 10-20 parts of electrolytic manganese, 10-40 parts of silica powder, 10-20 parts of cryolite powder, 5-10 parts of nickel powder, 2-5 parts of molybdenum powder, 5-10 parts of potassium titanate, and 5-10 parts of potassium fluosilicate. Compared with the prior art, the auxiliary welding rod is smooth in surface, high in yield, and stable in eccentricity.

Description

technical field [0001] The invention relates to the technology in the field of welding materials for bridges, in particular to a matching welding rod suitable for Q500QE steel used in bridges, a preparation method and a welding method. Background technique [0002] my country's steel bridges grew up on their own after the founding of the People's Republic of China, when foreign countries imposed economic and technological blockades on us. [0003] In 1957, with the help of the technology and materials of experts from the former Soviet Union, China completed the construction of the Wuhan Yangtze River Road and Railway Bridge. The total length of the bridge is 1155.5m, and the main span is 128m. It is the first time on the Yangtze River that "one bridge flies from north to south, and the natural moat becomes a thoroughfare". This is the first bridge built on the Yangtze River, and it is the first milestone in the history of bridges in our country. The steel used in the bridg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
CPCB23K35/365B23K35/40
Inventor 黄义芳蒋勇郭栖利张晓柏李欣雨刘杰杨飞邬亲丹张克静明廷泽陈维富
Owner ATLANTIC CHINA WELDING CONSUMABLES
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