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Attrition-resistant flux-cored wire for welding deposit repairing

A flux-cored wire and flux-cored technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of high price, improve hardness, prevent grain growth, and improve wear resistance. Effect

Inactive Publication Date: 2017-05-10
天长市通联焊业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the widely used wear-resistant surfacing flux-cored welding wire is mainly high-chromium-iron-based alloy-based flux-cored welding wire. By controlling the content of chromium and boron elements, the formation of primary M 7 C 3 and eutectic Fe 2 Type B hard phase is used to improve the hardness and wear resistance of the wear-resistant band. The flux-cored wire used for roll surfacing repair is basically a stainless steel wear-resistant wire with a Cr content of 13%, and the price is relatively high.

Method used

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  • Attrition-resistant flux-cored wire for welding deposit repairing
  • Attrition-resistant flux-cored wire for welding deposit repairing

Examples

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Embodiment 1

[0025] A wear-resistant flux-cored welding wire for surfacing repairing, including a low-carbon steel sheath and a flux core filled in the low-carbon steel sheath, the flux core components include: C 0.4%, Si 1.55%, Mn 1.15%, Cr 7.5%, Ni 1%, Mo 2%, V0.025%, W 2.05%, Nb 3.75%, P≤0.02%, S≤0.02%, the balance is iron and unavoidable impurities.

Embodiment 2

[0027] A wear-resistant flux-cored welding wire for surfacing repairing, including a low-carbon steel sheath and a flux core filled in the low-carbon steel sheath, the flux core components include: C 0.3%, Si 2%, Mn 0.8%, Cr 9%, Ni0.5%, Mo 2.5%, V0.01%, W 3%, Nb 2%, P 0.02%, S 0.02%, and the balance is iron and unavoidable impurities.

Embodiment 3

[0029]A wear-resistant flux-cored welding wire for surfacing repairing, including a low-carbon steel sheath and a flux core filled in the low-carbon steel sheath, the flux core components include: C 0.5%, Si 1%, Mn 1.5%, Cr 6%, Ni 1.5%, Mo 1%, V0.045%, W 1%, Nb 5%, P 0.01%, S 0.01%, the balance is iron and unavoidable impurities.

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Abstract

The invention discloses an attrition-resistant flux-cored wire for welding deposit repairing. The attrition-resistant flux-cored wire comprises a mild steel outer layer and a flux core filled in the mild steel outer layer. The flux core comprises, by weight, 0.3-0.5% of C, 1-2% of Si, 0.8-1.5% of Mn, 6-9% of Cr, 0.5-1.5% of Ni, 1-2.5% of Mo, 0.01-0.045% of V, 1-3% of W, 2-5% of Nb, less than or equal to 0.02% of P and less than or equal to 0.02% of S, the balance iron and unavoidable impurities. According to the attrition-resistant flux-cored wire, the chromium content is reduced, three microalloys, namely molybdenum, tungsten and niobium, are added at the same time, the attrition resistance of a welding line is improved, meanwhile, the other mechanical properties are ensured, the production cost is reduced and the attrition-resistant flux-cored wire is beneficial to industrialization.

Description

technical field [0001] The invention relates to the technical field of wear-resistant flux-cored welding wire, in particular to a wear-resistant flux-cored welding wire for surfacing and repairing. Background technique [0002] The back-up roll is an important part of rolling mill operation and one of the main consumable spare parts in steel rolling production. Improving the wear resistance of the back-up roll is an important way to improve production efficiency and reduce production costs. At present, the widely used wear-resistant surfacing flux-cored welding wire is mainly high-chromium-iron-based alloy-based flux-cored welding wire. By controlling the content of chromium and boron elements, the formation of primary M 7 C 3 and eutectic Fe 2 B-type hard phase is used to improve the hardness and wear resistance of the wear-resistant band. The flux-cored wire used for roll surfacing repair is basically a stainless steel wear-resistant wire with a Cr content of 13%, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/12B23K35/30
CPCB23K35/0266B23K35/3086
Inventor 卢齐元
Owner 天长市通联焊业有限公司