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Flux-cored wire for austenitic stainless steel welding

A technology of austenitic stainless steel and welding wire, which is applied in the direction of welding/welding/cutting articles, welding medium, welding equipment, etc., can solve the problems such as the influence of welding wire process performance, and achieve the effect of excellent welding process performance and good weld forming quality

Active Publication Date: 2012-05-16
CHINA JINGYE ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali metal oxides are generally introduced into welding wire powder through carbonate or feldspar, but the decomposition of carbonate and the acidic oxide SiO in feldspar 2 On the contrary, it will affect the process performance of welding wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Select a 304L austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 4555g, and roll it into a U shape, 185g of metal chromium, 80g of metal nickel, 20g of electrolytic metal manganese, 10g of aluminum-magnesium alloy, 280g of rutile, and 30g of quartz , 20g zircon sand, 20g feldspar, 10g cryolite, 20g arc stabilizer, 325g iron powder, a total of 1000g drug powder, mixed evenly and added to the U-shaped groove, the filling rate is 18% (weight), after the joint is reduced, the diameter is reduced , bright annealing, and then reduce the diameter, the final finished wire diameter is 0.9mm.

Embodiment 2

[0045] Select a 304L austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 4555g, and roll it into a U shape, 250g of metal chromium, 100g of metal nickel, 50g of electrolytic metal manganese, 30g of aluminum-magnesium alloy, 350g of rutile, and 50g of quartz , 50g zircon sand, 50g feldspar, 20g cryolite, 50g arc stabilizer, a total of 1000g drug powder, mixed evenly and added to the U-shaped groove, the filling rate is 18% (weight), after the joint is reduced, bright annealed, Then reduce the diameter, the final finished wire diameter is 1.2mm.

Embodiment 3

[0047] Select a 304L austenitic stainless steel strip with a thickness of 0.4mm, a width of 10mm, and a weight of 4000g, and roll it into a U shape, 200g of metal chromium, 90g of metal nickel, 40g of electrolytic metal manganese, 20g of aluminum-magnesium alloy, 300g of rutile, and 40g of quartz , 42g zircon sand, 35g feldspar, 15g cryolite, 35g arc stabilizer, 183g iron powder, a total of 1000g drug powder, mixed evenly and added to the U-shaped groove, the filling rate is 20% (weight), after the joint is reduced, the diameter is reduced , bright annealing, and then reduce the diameter, the final finished wire diameter is 0.9mm.

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Abstract

The invention discloses a flux-cored wire for austenitic stainless steel welding. The flux-cored wire consists of a flux core and an external steel belt; the external steel belt is an austenitic stainless steel belt of which the carbon content is less than 0.025 percent; the carbon content of the flux core is not greater than 0.04 percent and carbon accounts for 18.0 to 24.0 percent based on the total weight of the flux-cored wire; the flux core comprises the following components in percentage by weight: 18.5 to 25.0 percent of metal chromium powder, 8.0 to 10.0 percent of metal nickel powder, 2.0 to 5.0 percent of electrolytic manganese metal, 1.0 to 3.0 percent of aluminum magnesium alloy, 28.0 to 35.0 percent of rutile, 3.0 to 5.0 percent of quartz, 2.0 to 5.0 percent of zircon sand, 2.0 to 5.0 percent of feldspar, 1.0 to 2.0 percent of cryolite, 2.0 to 5.0 percent of arc stabilizer and the balance of iron powder; and the arc stabilizer consists of K2O, Na2O and TiO2 in a weight ratio of (6.0-8.0):(8.0-10.0):(68.0-70.0), and the water content is not greater than 400 ppm.

Description

technical field [0001] The invention belongs to the welding field of material processing engineering, and in particular relates to an ultra-low-carbon flux-cored wire with fine diameter for welding austenitic stainless steel. Background technique [0002] Welding austenitic stainless steel with thin diameter (diameter no more than 1.2mm) flux-cored wire has the characteristics of high efficiency, low cost and high degree of automation, which is the development direction of stainless steel stainless steel welding technology in the future. [0003] In stainless steel welding, the corrosion resistance of welded joints is one of the focuses, among which intergranular corrosion cracks are the most common. Carbon is an important element that affects the intergranular corrosion resistance of stainless steel welded joints, especially when the stainless steel does not contain stabilizing elements such as titanium and niobium, the increase in the carbon content of the weld will signif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40B23K9/00B23K103/04
Inventor 张迪王英杰宁宇刘景凤白波段斌聂祯华周德成
Owner CHINA JINGYE ENG TECH CO LTD
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