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Stainless heat-proof self-protecting flux-cored wire for magnesium smelting reduction tank

The technology of flux-cored welding wire and reduction tank is applied in the field of magnesium smelting reduction tank welding and stainless heat-resistant self-protected flux-cored welding wire, which can solve the problems that restrict the application of magnesium smelting reduction tank, the high price of magnesium smelting reduction tank, and the welding quality. problems, etc., to achieve the effect of improving the quality of welded joints, strong welding flexibility, and difficult grain growth

Active Publication Date: 2015-01-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The price of the reduction tank for magnesium smelting is high, and the number of replacements is large. In addition, in the production process, multiple reduction tanks are often working at the same time. If a single reduction tank has welding quality problems and cannot be repaired or replaced in time, it will lead to production stoppage and huge losses. economic loss
The lack of welding materials for high-quality, high-efficiency and automated magnesium-smelting reduction tanks severely restricts the application of magnesium-smelting reduction tanks

Method used

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  • Stainless heat-proof self-protecting flux-cored wire for magnesium smelting reduction tank
  • Stainless heat-proof self-protecting flux-cored wire for magnesium smelting reduction tank
  • Stainless heat-proof self-protecting flux-cored wire for magnesium smelting reduction tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. A SUS304L stainless steel strip of 8×0.25 (8mm in width and 0.25mm in thickness) is selected, and the filling rate is 15%. After drawing and reducing the diameter, a welding wire with a diameter of 1.2 mm is obtained.

[0036] The mass percentage of each alloy composition in the powder core is: the mass percentage of rutile is 8%, the mass percentage of sodium carbonate is 0.8%, the mass percentage of feldspar is 4%, the compound fluoride (20% BaF 2 -8%LiF 2 -10%MgF2-62CaF 2 , the mass percentage that has supplemented in front) is 6%, the mass percentage of chromium is 35%, the mass percentage of nickel is 12%, the mass percentage of manganese is 4%, the mass percentage of molybdenum is 6%, the mass percentage of chromium nitride The percentage is 1%, the mass percentage of aluminum-magnesium alloy is 6%, the mass percentage of mixed rare earth is 6%, and the balance is reduced iron. The welding current used during welding is 130A, and the welding volta...

Embodiment 2

[0037] Embodiment 2. A 10×0.4 (10 mm in width and 0.4 mm in thickness) SUS304L stainless steel strip is selected, and the filling rate is 20%. After drawing and reducing the diameter, a welding wire with a diameter of 1.4mm is obtained.

[0038] The mass percentage of each alloy composition in the powder core is: the mass percentage of rutile is 9%, the mass percentage of sodium carbonate is 0.6%, the mass percentage of feldspar is 8%, the compound fluoride (20% BaF 2 -8%LiF 2 -10%MgF2-62CaF 2 ) is 8% by mass, 36% by mass of chromium, 8% by mass of nickel, 5% by mass of manganese, 4% by mass of molybdenum, and 2% by mass of chromium nitride, The mass percentage of the aluminum-magnesium alloy is 4%, the mass percentage of the mixed rare earth is 5%, and the balance is reduced iron. The welding current used during welding is 160A, and the welding voltage is 26V.

Embodiment 3

[0039] Embodiment 3. 8×0.3 (8 mm in width and 0.3 mm in thickness) SUS304L stainless steel strips are selected, and the filling rate is 22%. After drawing and reducing the diameter, a welding wire with a diameter of 1.2 mm is obtained.

[0040] The mass percentage of each alloy composition in the powder core is: the mass percentage of rutile is 10%, the mass percentage of sodium carbonate is 2.3%, the mass percentage of feldspar is 6%, the compound fluoride (20% BaF 2 -8%LiF 2 -10%MgF2-62CaF 2 ) is 9% by mass, 34% by mass of chromium, 11.7% by mass of nickel, 4% by mass of manganese, 10% by mass of molybdenum, and 3% by mass of chromium nitride, The mass percentage of the aluminum-magnesium alloy is 4%, the mass percentage of the mixed rare earth is 7%, and the balance is reduced iron. The welding current used during welding is 180A, and the welding voltage is 28V.

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Abstract

A stainless heat-proof self-protecting flux-cored wire for a magnesium smelting reduction tank belongs to the technical field of materials processing engineering. A normal stainless steel band 304L or common carbon steel serves as a coating layer, and alloys in a powder core are rutile, sodium carbonate, feldspar, compound fluorides, chromium, nickel, manganese, molybdenum, chromium nitride, aluminium-magnesium alloy, misch metal and iron power. Compared with a conventional stainless steel welding rod, the stainless heat-proof self-protecting flux-cored wire has the advantages that higher welding current can be used; higher welding speed can be realized; the production efficiency is improved; and the labor intensity is lowered; c. Compared with a conventional stainless steel submerged-arc welding solid wire, the stainless heat-proof self-protecting flux-cored wire has the advantages that all-position welding can be realized; the heat input is small; the slag detachability is good; and the manufacturing technique is simpler. A welded joint formed by using the stainless heat-proof self-protecting flux-cored wire provided by the invention has favorable heat resistance, oxidation resistance, vulcanization and corrosion resistance and high-temperature creep resistance compared with welded joints formed by welding the stainless steel welding rod and the stainless steel solid wire.

Description

technical field [0001] The invention belongs to the technical field of material processing engineering, and relates to a stainless heat-resistant self-protecting flux-cored welding wire, which is mainly used for welding reduction tanks for magnesium smelting. technical background [0002] Magnesium and magnesium alloys are currently the lightest structural materials in industrial applications. They have high specific strength, specific stiffness and good processing performance. In addition, they also have good thermal conductivity and electrical conductivity, damping and shock absorption, and electromagnetic shielding. Good and other characteristics, magnesium alloy is easy to process and shape, more importantly, it is easy to recycle and easy to degrade, so it is a very valuable green structural material. These characteristics of magnesium alloy make it widely used in electronic appliances, aerospace, national defense industry, automobile and other fields. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/365
CPCB23K35/0266B23K35/24B23K35/3601B23K35/3605B23K35/3608B23K35/368B23K35/406
Inventor 栗卓新李国栋
Owner BEIJING UNIV OF TECH
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