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Flux-cored wire for gas-shielded welding of high-chromium-nickel all-austenitic stainless steel

A fully austenitic, flux-cored welding wire technology, applied in the direction of welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of poor welding process performance, limited, difficult to meet high requirements, high-quality stainless steel welding, etc. problems, to achieve the effect of excellent welding process performance and good weld forming quality

Inactive Publication Date: 2012-10-03
CHINA JINGYE ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the composition of solid welding wire is limited by the type of wire rod used in iron and steel enterprises, and its welding process performance is poor, it is difficult to meet high requirements and high-quality stainless steel welding
Therefore, the development of gas-shielded flux-cored wire suitable for welding high-chromium-nickel fully austenitic stainless steel has significant economic benefits, and there are no related patents or literature reports yet

Method used

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  • Flux-cored wire for gas-shielded welding of high-chromium-nickel all-austenitic stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Select a 309 austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 2571g, and roll it into a U shape, 250g of metal chromium powder, 290g of metal nickel powder, 40g of electrolytic metal manganese, 20g of high-carbon ferrochrome, and 180g of rutile , 10g of quartz, 10g of zircon sand, 10g of feldspar, 5g of fluorite, 5g of barium carbonate, 5g of calcium carbonate, 175g of iron powder, a total of 1000g of powder, mixed evenly and added to the U-shaped tank, the filling rate is 28%, after closing After several times of rolling and reducing, the diameter of the final finished welding wire is 1.2mm.

Embodiment 2

[0048] Select a 309 austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 2571g, and roll it into a U shape. 280g of metal chromium powder, 320g of metal nickel powder, 50g of electrolytic metal manganese, 40g of high-carbon ferrochrome, and 200g of rutile , 20g of quartz, 20g of zircon sand, 30g of feldspar, 10g of fluorite, 15g of barium carbonate, 10g of calcium carbonate, 5g of iron powder, a total of 1000g of powder, mixed evenly and added to the U-shaped tank, the filling rate is 28%, after closing After several times of rolling and reducing, the diameter of the final finished welding wire is 1.2mm.

Embodiment 3

[0050] Select a 309 austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 3448g, and roll it into a U shape, 270g of metal chromium powder, 300g of metal nickel powder, 45g of electrolytic metal manganese, 30g of high-carbon ferrochrome, and 190g of rutile , 15g of quartz, 15g of zircon sand, 30g of feldspar, 8g of fluorite, 8g of barium carbonate, 10g of calcium carbonate, 79g of iron powder, a total of 1000g of powder, mixed evenly and added to the U-shaped tank, the filling rate is 29%, after closing After several times of rolling and reducing, the diameter of the final finished welding wire is 1.2mm.

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Abstract

The invention provides a flux-cored wire for the all-position welding of an austenitic stainless steel, comprising flux powder and a stainless steel band for external use, wherein the weight of a flux core accounts for 28.0-30.0 percent of the total weight of the flux-cored wire, the flux core contains the following components accounting for the flux core in percentage by weight: 25.0%-28.0% of metallic chromium powder, 29.0%-32.0% of metallic nickel powder, 4.0%-5.0% of electrolytic metallic manganese, 2.0%-4.0% of high carbon ferro-chrome, 18.0%-20.0% of rutiles, 1.0%-2.0% of quartz, 1.0%-2.0% of zircon sands, 1.0%-3.0% of feldspars, 0.5%-1.0% of fluorspars, 0.5%-1.5% of calcium carbonate, 0.5%-1.5% of barium carbonate, and the balance of ferrous powder. The flux-cored wire has good welding process property and is suitable for the all-position gas-shielded welding of a high-chromium-nickel all-austenitic stainless steel.

Description

technical field [0001] The invention belongs to the welding field of material processing engineering, and in particular relates to a flux-cored welding wire for gas shielded welding of high-chromium-nickel full austenitic stainless steel. Background technique [0002] The microstructure of traditional stainless steel (such as 304 stainless steel) is composed of austenite and a small amount of ferrite. The presence of a small amount of ferrite improves the crack resistance of austenitic stainless steel. However, for stainless steel used at high temperature or under severe corrosion conditions, the existence of ferrite will damage the high temperature performance and corrosion resistance of stainless steel. Therefore, for high temperature or severe corrosion conditions, it is necessary to use fully austenitic stainless steel, that is, stainless steel composed of a single austenite structure. [0003] The most typical full austenitic stainless steel is Cr25Ni20 alloy series 31...

Claims

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Application Information

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IPC IPC(8): B23K35/368B23K35/40
Inventor 张迪王英杰符定梅肖静程美洁李侠曾宪芳周德成
Owner CHINA JINGYE ENG
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