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A 309(l) stainless steel flux-cored wire for thin plate welding

A flux-cored welding wire and thin plate welding technology, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of reducing the heat input of the arc to the base material, melting the base material, and poor weld formation

Active Publication Date: 2018-10-19
江苏恒熠金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when welding stainless steel sheets, due to the small current, the stainless steel flux-cored wires are mostly short-circuit transitions, and the periodic short-circuit process reduces the heat input of the arc to the base metal, and the base metal is insufficiently melted, so that the droplet transition will affect the molten pool. Unsatisfactory spreading of the wetting agent, i.e. poor weld formation

Method used

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  • A 309(l) stainless steel flux-cored wire for thin plate welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The E309L austenitic stainless steel flux-cored wire used for welding austenitic stainless steel adopts 304L stainless steel tape as the outer skin 8×0.3mm (the composition is shown in Table 1), the diameter of the wire is 1.2mm; the chemical composition of the flux core (weight% ) Is: TiO 2 : 6.0%, SiO 2 : 2.5%, Al 2 O 3 : 0.6%, ZrO 2 : 0.08%, K 2 O+Na 2 O: 0.3%, fluoride: 0.5%, Ni: 4.1%, Cr: 10.7%, Mn: 1.6%, Si: 0.5%, FLC additive: 3%, the balance is iron powder, the filling of the flux cored wire Rate: 33.5%. Use 100% CO 2 As a shielding gas, the gas flow rate is 15L / min, the welding current is 90A, and the welding voltage is 22V.

Embodiment 2

[0032] The E309L austenitic stainless steel flux-cored wire used for welding austenitic stainless steel uses 304L stainless steel tape as the outer skin 8×0.4mm (the composition is shown in Table 1), the diameter of the wire is 1.2mm; the chemical composition of the flux core (weight% ) Is: TiO 2 : 6.0%, SiO 2 : 2.5%, Al 2 O 3 : 0.6%, ZrO 2 : 0.08%, K 2 O+Na 2 O: 0.3%, fluoride: 0.5%, Ni: 4.1%, Cr: 10.7%, Mn: 1.3%, Si: 0.4%, FLC additive: 4%, the balance is iron powder, the filling of the flux cored wire Rate: 33.0%. Use 100% CO 2 As a shielding gas, the gas flow rate is 16L / min, the welding current is 100A, and the welding voltage is 23V.

Embodiment 3

[0034] The E309L austenitic stainless steel flux-cored wire used for welding austenitic stainless steel adopts 304L stainless steel belt as the outer skin 9×0.3mm (the composition is shown in Table 1), the diameter of the wire is 1.2mm; the chemical composition of the flux core (weight% ) Is: TiO 2 : 6.0%, SiO 2 : 2.5%, Al 2 O 3 : 0.5%, ZrO 2 : 0.09%, K 2 O+Na 2 O: 0.2%, fluoride: 0.5%, Ni: 4.1%, Cr: 10.7%, Mn: 1.4%, Si: 0.5%, FLC additive: 5%, the balance is iron powder, the filling of the flux cored wire Rate: 34.0%. Use 100% CO 2 As a shielding gas, the gas flow rate is 17L / min, the welding current is 110A, and the welding voltage is 24V.

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Abstract

The invention belongs to the field of welding, and discloses a 309(L) stainless steel flux-cored wire for thin plate welding. 304L stainless steel band skin is adopted. A flux core comprises 5.5%-7.5% of TiO2, 1%-4% of SiO2, 0.5%-3% of Al2O3, 0.1%-1% of fluoride, 0.02%-0.1% of ZrO2, 0.1%-0.5% of Na2O+K2O, 3.5%-7.5% of Ni, 8%-18% of Cr, 0.5%-2.5% of Mn, 0.1%-0.5% of Si, 2%-7% of an FLC additive and the balance iron powder. The FLC additive comprises 30%-50% of an aluminum magnesium alloy, 5%-7% of Si, 10%-20% of polytetrafluoroethylene, 3%-6% of rare earth fluoride, 20%-40% of spodumene and 10%-30% of lepidolite. The filling rate of the flux core ranges from 25% to 40%. The 309(L) stainless steel flux-cored wire has the good welding processing property and excellent arc stability, and weld joint spreading is good.

Description

Technical field [0001] The invention belongs to the welding field in material processing engineering, and specifically relates to a 309(L) stainless steel flux core used in the fields of dissimilar welding of 1.5-3mm stainless steel sheet and carbon steel or low-alloy steel, bottom welding of stainless steel clad steel plate coating, etc. Welding wire. technical background [0002] The development of stainless steel welding consumables has achieved important results so far. The output of stainless steel flux-cored welding wire has been increasing year by year. The market has an increasing demand for stainless steel sheets, especially stainless steel plates below 3mm. The main feature of high-end thin plate weldments is that the weld seam is beautifully formed, the weld seam surface spreads well, and the good shape is a sensory enjoyment. For thin plate weldments, it is necessary to use small specification welding parameters to prevent excessive welding deformation under large sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3086
Inventor 栗卓新王宁李国栋李红
Owner 江苏恒熠金属制品有限公司