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Ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service and preparation method thereof

An ultra-supercritical, high-temperature service technology, applied in welding equipment, welding/cutting media/materials, welding media, etc., can solve the problem that the welding rod cannot use the ultra-supercritical material CB2 steel, and the welding rod cannot be matched with CB2. Good performance in all positions, good slag removal, and strict control of chemical composition

Active Publication Date: 2017-06-09
ATLANTIC CHINA WELDING CONSUMABLES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Existing electrodes cannot be used for the welding of ultra-supercritical material CB2 steel in long-term high-temperature service. For example, application number 201310010769.7 discloses a supercritical ferritic heat-resistant steel matching electrode and its production method. Application number 201210554241.1 discloses a A new type of ultra-supercritical ferritic heat-resistant steel electrode and its preparation method. The electrodes disclosed in these two patents cannot be matched with CB2 under long-term high temperature and durability.

Method used

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  • Ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service and preparation method thereof
  • Ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service and preparation method thereof
  • Ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, solder core (wt%): C 0.08-0.10wt%, Mn 0.10-0.30wt%, 0≤Si≤0.10wt%, 0≤S≤0.010wt%, 0≤P≤0.010wt%, Ni 0.10-0.80wt%, Cr 8.50-9.50wt%, Mo1.00-1.40wt%, V 0.10-0.20wt%, Nb 0.001-0.10wt%, N 0.001-0.050wt%, Co 0.90-1.10wt%, 0≤Al≤0.040wt%, B 0.002-0.010wt%, the balance being Fe and impurities.

[0033] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): marble: 240, fluorite: 200, rutile: 65, soda ash: 5, zircon sand: 6.5, iron powder: 140 , Electrolytic manganese: 20, silicon micropowder: 65, ice crystal powder: 45, nickel powder: 5, metallic chromium: 6, molybdenum powder: 3, ferrovanadium: 5, niobium powder: 4, ferrochromium nitride: 10, fluoroboric acid Potassium: 6, borax: 3, rare earth silicon magnesium iron alloy: 2.

[0034] After the above powder is mixed evenly, add 250g of potassium sodium water glass with a concentration of 43°, stir and mix evenly, send it into the bar press and wrap it on the 4....

Embodiment 2

[0041] The welding core of this experimental embodiment is the same as that of the selected embodiment one.

[0042] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): marble: 290, fluorite: 260, rutile: 45, soda ash: 5, zircon sand: 6, iron powder: 115 , Electrolytic manganese: 25, silicon micropowder: 65, ice crystal powder: 45, nickel powder: 6, metallic chromium: 6, molybdenum powder: 3, ferrovanadium: 5.5, niobium powder: 5, ferrochromium nitride: 11, fluoroboric acid Potassium: 5, borax: 6, rare earth silicon magnesium iron alloy: 2.

[0043] After the above powder is mixed evenly, add 250g of potassium sodium water glass with a concentration of 43°, stir and mix evenly, send it into the bar press and wrap it on the 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 to obtain the welding rod.

[0044] T...

Embodiment 3

[0049] The welding core of this experimental embodiment is the same as that of the selected embodiment one.

[0050] In this embodiment, when the welding core is 1000g, the composition and content of the coating are (g): marble: 270, fluorite: 250, rutile: 47, soda ash: 5, zircon sand: 6, iron powder: 120 , Electrolytic manganese: 24, silicon micropowder: 66, ice crystal powder: 48, nickel powder: 6, metal chromium: 6, molybdenum powder: 3, vanadium ferro: 5.5, niobium powder: 5, chromium nitride ferro: 11, fluorine Potassium borate: 3, borax: 7, rare earth silicon magnesium iron alloy: 2.

[0051] After the above powder is mixed evenly, add 250g of potassium sodium water glass with a concentration of 43°, stir and mix evenly, send it into the bar press and 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 to obtain the welding rod.

[0052] The...

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Abstract

The invention discloses an ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service. A coating is prepared from, by weight, 220-300 parts of marble, 180-300 parts of fluorite, 40-70 parts of rutile, 4.5-7.0 parts of sodium carbonate, 6-8 parts of zircon sand, 100-150 parts of iron powder, 10-30 parts of electrolytic manganese, 40-80 parts of silica powder, 20-60 parts of cryolite powder, 1-15 parts of nickel powder, 1-10 parts of chromium metal, 1-5 parts of molybdenum powder, 1-15 parts of ferrovanadium, 1-15 parts of niobium powder, 1-15 parts of nitrogen-bearing ferrochromium, 1-10 parts of potassium fluoborate, 1-10 parts of borax and 1-5 parts of si-mg-fe alloy. Weld joint molding is attractive, the weld pass height is moderate, the weld joint infiltration angle is moderate, and the deposited metal physical and chemical property is moderate.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to an ultra-supercritical material CB2 steel matching electrode suitable for long-term high-temperature service, a preparation method and a welding method thereof. Background technique [0002] New materials are one of the strategic emerging industries supported by the state. New welding materials are the basic materials for the industrialization of new steel materials. As one of the basic manufacturing technologies, welding technology is also an important part of the country's development of high-end equipment manufacturing emerging strategic industries. . Therefore, the development of new welding materials is an important direction for the development of national industrial policies. [0003] Since ultra-supercritical units are compared with conventional thermal power units, the availability rate of supercritical units is equivalent to that of subcritical units, and the efficienc...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/36B23K35/40
CPCB23K35/3093B23K35/3601B23K35/40
Inventor 黄义芳蒋勇张晓柏钟杰刘杰李欣雨谭小平陈维富赵鹏飞张海波张红涛
Owner ATLANTIC CHINA WELDING CONSUMABLES
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