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Flux-cored welding wire with good toughness and low porosity

A flux-cored wire, good toughness technology, used in welding media, welding equipment, welding/cutting media/materials, etc.

Inactive Publication Date: 2017-10-27
安徽飞弧焊业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, spatter is often easily generated during the surfacing process, resulting in a large number of pores in the welded coating structure, thereby reducing the toughness and crack resistance of the welded coating

Method used

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  • Flux-cored welding wire with good toughness and low porosity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A flux-cored welding wire with low porosity and good toughness, comprising a low-carbon steel strip sheath and a flux core, wherein the raw materials of the flux core include: 0.5% graphite, 12% chromium powder, 3% manganese dioxide, 4.5% nickel powder, 4% niobium powder, 3% zirconium powder, 0.5% silicon dioxide, 9.5% rhenium oxide, 13% magnesium aluminum alloy, 7% fluoride, 3% lithium carbonate, and the balance is iron powder.

Embodiment 2

[0017] A flux-cored welding wire with low porosity and good toughness, comprising a low-carbon steel strip sheath and a flux core, wherein the raw materials of the flux core include: graphite 0.4%, chromium powder 14%, manganese dioxide 2%, Nickel powder 5.5%, niobium powder 3%, zirconium powder 4%, silicon dioxide 0.4%, rhenium oxide 10%, magnesium aluminum alloy 12%, fluoride 8%, lithium carbonate 1.5%, and the balance is iron powder;

[0018] Wherein, the fluoride is lithium fluoride and calcium fluoride, wherein the weight ratio of lithium fluoride to calcium fluoride is 4:1;

[0019] The raw materials of the drug core must be pretreated, and the pretreatment steps are: mixing the raw materials of the drug core, granulating, sintering at 800°C for 40 minutes, and crushing to 100 mesh;

[0020] The filling amount of the flux core is 48% of the total weight of the welding wire.

Embodiment 3

[0022] A flux-cored welding wire with low porosity and good toughness, comprising a low-carbon steel strip sheath and a flux core, wherein the raw materials of the flux core include: 0.6% graphite, 10% chromium powder, 4% manganese dioxide, Nickel powder 3.5%, niobium powder 5%, zirconium powder 2%, silicon dioxide 0.6%, rhenium oxide 9%, magnesium aluminum alloy 14%, fluoride 6%, lithium carbonate 4%, the balance is iron powder;

[0023] Wherein, the fluoride is lithium fluoride and calcium fluoride, wherein the weight ratio of lithium fluoride to calcium fluoride is 2:1;

[0024] The raw materials of the drug core must be pretreated, and the pretreatment steps are: mixing the raw materials of the drug core, granulating, sintering at 900°C for 20 minutes, and crushing to 200 mesh;

[0025] The filling amount of the flux core is 44% of the total weight of the welding wire.

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Abstract

The invention discloses a flux-cored welding wire with good toughness and low porosity. The welding wire includes a mild-carbon steel strip sheath and a flux core, wherein the flux core is prepared from, by weight, 0.4-0.6% of graphite, 10-14% of chromium powder, 2-4% of manganese dioxide, 3.5-5.5% of nickel powder, 3-5% of columbium powder, 2-4% of zirconium powder, 0.4-0.6% of silicon dioxide, 9-10% of rhenium oxide, 12-14% of magnalium, 6-8% of fluoride, 1.5-4.5% of lithium carbonate and the balance iron powder. The welding coating of the flux-cored welding wire has the advantages of being low in porosity, compact in coating microstructure and good in toughness.

Description

technical field [0001] The invention relates to the field of welding wire technology, in particular to a flux-cored welding wire with low porosity and good toughness. Background technique [0002] Metal parts are often damaged during use, resulting in a lot of waste. The damaged parts can be repaired by surfacing welding, so that they can be reused and the waste of metal parts can be reduced. However, spatter is often generated during the surfacing process, which causes a large number of pores in the welded coating structure, thereby reducing the toughness and crack resistance of the welded coating. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a flux-cored welding wire with low porosity and good toughness. The present invention cooperates with each other to make the welding coating of the present invention have low porosity, dense coating structure and good toughness. . [0004] A...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3086B23K35/368
Inventor 卢齐元
Owner 安徽飞弧焊业股份有限公司
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