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A flux-cored welding wire of austenitic stainless steel with no oxidation color on the surface of the weld seam

A technology of austenitic stainless steel and flux-cored welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of reduced corrosion resistance, disorderly distribution of different oxidation colors, poor oxidation resistance, etc. Achieve the effects of easy slag removal, small welding spatter and good process performance

Inactive Publication Date: 2016-08-31
CHANGZHOU XINDE WELDING MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most austenitic stainless steel flux-cored wire welds have poor oxidation resistance on the surface, and different oxidation colors are prone to appear on the surface of the weld after welding.
The best weld surface is silver-white, the worst is blue-black, and severe weld oxidation will also reduce corrosion resistance

Method used

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  • A flux-cored welding wire of austenitic stainless steel with no oxidation color on the surface of the weld seam
  • A flux-cored welding wire of austenitic stainless steel with no oxidation color on the surface of the weld seam
  • A flux-cored welding wire of austenitic stainless steel with no oxidation color on the surface of the weld seam

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Experimental program
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Effect test

Embodiment 1

[0039] The E308L austenitic stainless steel flux-cored welding wire used for austenitic stainless steel welding adopts 304L stainless steel strip as the outer skin 8 × 0.3mm (composition as shown in Table 1), and the wire diameter is 1.2; the chemical composition of the flux core (weight %) For: TiO 2 : 12%, SiO 2 : 24%, MnO 2 : 12%, ZrO 2 : 8%, K 2 O+Na 2 O: 6% out of both K 2 O≥67%, Cryolite: 0.5%, Bi 2 o 3 : 0.2%, Cr: 21%, Ni: 5%, Mn: 7%, Al: 3%, the balance is iron powder, the filling rate of Chinese medicine powder in flux-cored wire: 22%. Using 100% CO 2 As a shielding gas, the gas flow rate is 20L / min, the welding current is 180A, and the welding voltage is 28V.

Embodiment 2

[0041] The E308L austenitic stainless steel flux-cored welding wire used for austenitic stainless steel welding adopts 304L stainless steel strip as the outer skin 10 × 0.4mm (composition as shown in Table 1), and the wire diameter is 1.2; the chemical composition of the flux core (weight %) For: TiO 2 : 6%, SiO 2 : 30%, MnO 2 : 8%, ZrO 2 : 8%, K 2 O+Na 2 O: 8% out of both K 2 O≥67%, Cryolite: 0.6%, Bi 2 o 3 : 0.2%, Cr: 21%, Ni: 8%,, Mn: 5%, Al: 3%, the balance is iron powder, the filling rate of Chinese medicine powder in flux-cored wire: 25%. Using 20%Ar+80%CO 2 As a shielding gas, the gas flow rate is 23L / min, the welding current is 185A, and the welding voltage is 29V

Embodiment 3

[0043] The E308L austenitic stainless steel flux-cored welding wire used for austenitic stainless steel welding adopts 304L stainless steel strip as the outer skin 8 × 0.3mm (composition as shown in Table 1), and the wire diameter is 1.2; the chemical composition of the flux core (weight %) For: TiO 2 : 18%, SiO 2 : 18%, MnO 2 : 8%, ZrO 2 : 10%, K 2 O+Na 2 O: 8% out of both K 2 O≥67%, Cryolite: 0.6%, Bi 2 o 3 : 0.2%, Cr: 23%, Ni: 7%,, Mn: 6%, Al: 2%, the balance is iron powder, the filling rate of Chinese medicine powder in flux-cored wire: 23%. Using 100% CO 2 As a shielding gas, the gas flow rate is 24L / min, the welding current is 190A, and the welding voltage is 30V

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Abstract

The invention discloses an austenitic stainless steel flux-cored wire having no oxidation tint on the surface of a welding joint, and belongs to the welding field. The austenitic stainless steel flux-cored wire uses the skin of a 304 stainless steel band (the width of the steel band is 8-16mm, and the thickness of the steel band is 0.3-0.6mm), the gas of 100% CO2 or 80% Ar and 20% CO2 is taken as the protection gas in the welding, a core comprises the following components according to weight percentages: 5-18% of TiO2, 15-30% of SiO2, 4-10% of MnO2, 4-12% of ZrO2, 4-12% of K2O and Na2O, 0.2-1.2% of cryolite, 19.5-22% of Cr, 5-10% of Ni, 5-12% of Mn, 1-5% of Al, and the balance of iron powder, wherein the content of K2O in the mixture of the K2O and the Na2O is more than or equal to 67%, and the filling rate of the powders in the flux-cored wire is 15-30%. The austenitic stainless steel flux-cored wire has excellent welding processing property and excellent oxidation resistance property, and the welding joint forms attractively and is pure in color.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a flux-cored welding wire for austenitic stainless steel with no oxidation color on the surface of the welding seam. Background technique [0002] The development of stainless steel welding consumables has achieved important results so far. The output of stainless steel flux-cored welding wire is increasing year by year, and the market demand for high-end products is also increasing. High-end products are characterized by low smoke and dust, low toxicity, beautiful shape and pure color. At present, the austenitic stainless steel flux-cored wire with beautiful color after welding is the main symbol of high-end stainless steel welding consumables. Stainless steel flux-cored wire not only has excellent welding process performance, but also meets the requirements of high-end products for the surface color of the weld . [0003] Delightful result...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3602B23K35/368B23K35/406
Inventor 栗卓新
Owner CHANGZHOU XINDE WELDING MATERIAL TECH
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