Flux-cored wire for austenitic stainless steel all-position welding

An austenitic stainless steel, all-position technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of increased flat welding spatter, sacrificial welding wire flat welding manufacturability, etc., to achieve less welding spatter, Good slag removal and high arc stability

Active Publication Date: 2011-11-02
北京远达国际工程管理咨询有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, to ensure the vertical welding or horizontal welding performance of the stainless steel flux cored wire,

Method used

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  • Flux-cored wire for austenitic stainless steel all-position welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Select austenitic stainless steel strip 304L with a thickness of 0.4mm, a width of 10mm, and a weight of 3545g, and roll it into a U shape. 200g of metal chromium powder, 70g of metal nickel powder, 20g of electrolytic metal manganese, 30g of aluminum powder, 5g of titanium iron, 320g rutile, 10g quartz, 20g zircon sand, 40g albite feldspar, 20g potassium feldspar, 10g cryolite, 10g lithium carbonate, 3g bismuth oxide, 242g iron powder, a total of 1000g powder, mixed evenly and added to the U-shaped tank, The filling rate is 22%. After the joint is closed, the diameter is reduced, bright annealed, and then reduced. The final diameter of the finished welding wire is 0.9mm.

Embodiment 2

[0044]Select austenitic stainless steel strip 304L with a thickness of 0.4mm, a width of 10mm, and a weight of 3545g, and roll it into a U shape. 230g of metal chromium powder, 85g of metal nickel powder, 40g of electrolytic metal manganese, 40g of aluminum powder, 10g of titanium iron, 340g rutile, 20g quartz, 40g zircon sand, 60g albite, 40g potassium feldspar, 15g cryolite, 15g carbonate, 4g bismuth oxide, 61g iron powder, a total of 1000g powder, mix well and add to the U-shaped tank , The filling rate is 22%. After closing, the diameter is reduced, bright annealed, and then reduced. The final diameter of the finished welding wire is 1.2mm.

Embodiment 3

[0046] Select austenitic stainless steel strip 304L with a thickness of 0.4mm, a width of 10mm, and a weight of 3348g, and roll it into a U shape, 220g of metal chromium powder, 75g of metal nickel powder, 25g of electrolytic metal manganese, 32g of aluminum powder, 6g of titanium iron, 330g rutile, 15g quartz, 28g zircon sand, 45g albite feldspar, 30g potassium feldspar, 12g cryolite, 12g lithium carbonate, 4g bismuth oxide, 166g iron powder, a total of 1000g powder, mixed evenly and added to the U-shaped tank, The filling rate is 23%. After the joint is closed, it undergoes diameter reduction, bright annealing, and then diameter reduction. The final diameter of the finished welding wire is 0.9mm.

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Abstract

The invention relates to a flux-cored wire for austenitic stainless steel all-position welding, and the flux-cored wire is composed of a flux core and an external stainless steel belt, wherein, the flux core accounts for 22-24wt% of the flux-cored wire, and the flux core comprises the following components in percentage by weight: 20-23% of metal chromium powder, 7-8.5% of metal nickel powder, 2-4% of electrolytic manganese metal, 3-4% of aluminium powder, 0.5-1% of ferrotitanium, 32-34% of rutile, 1-2% of quartz, 2-4% of zircon sand, 4-6% of albite, 2-4% of potassium feldspar, 1-1.5% of cryolite, 1-1.5% of lithium carbonate, 0.1-0.5% of bismuth oxide and the balance of iron powder. The ratio of the albite to the potassium feldspar in the flux core is 1.2-2, the sum of the albite and the potassium feldspar is not more than 10wt% of the flux core, the external stainless steel belt is the austenitic stainless steel 304L, the carbon content is less than 0.025wt%, the diameter of the flux-cored wire is 0.9-1.2mm, and the flux-cored wire can be used for realizing the austenitic stainless steel all-position welding.

Description

technical field [0001] The invention belongs to the welding field of material processing engineering, and particularly relates to a flux-cored welding wire for all-position welding of austenitic stainless steel. Background technique [0002] Stainless steel has been widely used for its excellent corrosion resistance. According to the chemical composition of stainless steel, it can be divided into chromium stainless steel and chromium-nickel stainless steel. According to the microstructure of stainless steel, it can be divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation strengthening stainless steel. Among them, austenitic stainless steel is the most widely used, and the most typical austenitic stainless steel is 18-8 stainless steel, that is, stainless steel containing 18wt% Cr and 8wt% Ni, while other austenitic stainless steels are derived from 18-8 stainless steel. come. [0003] The g...

Claims

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Application Information

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IPC IPC(8): B23K35/368B23K35/30B23K35/40
Inventor 张迪王英杰刘景凤谢晋平周德成白波段斌聂祯华
Owner 北京远达国际工程管理咨询有限公司
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