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A low-hydrogen flux-cored welding wire suitable for high-strength steel and its preparation method

A technology of flux-cored welding wire and high-strength steel, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as unstable welding performance, and achieve good forming, stable arc combustion, and good slag coverage

Active Publication Date: 2021-04-02
QINGDAO RUNQIAN HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing flux-cored welding wires for high-strength steel still have problems such as unstable welding performance. Therefore, it is necessary to develop a new flux-cored welding wire for high-strength steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. A low-hydrogen flux-cored welding wire suitable for high-strength steel. The flux-cored welding wire is composed of a sheath and a flux core, wherein the sheath is a nickel strip, and the composition of the flux core is calculated by mass percentage: CaF 2 45%, K 2 ZrF 6 4%, LiF 7%, Al8%, Mn 5%, Cr 4%, Mg 7%, Si 1%, B 1%, RE 2 o 3 3%, TiO 5%, CaO 4%, and the balance is Fe. The composition of the nickel strip is calculated by mass percentage: Ni+Co≥99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤0.10%, S≤0.005%. The thickness of the skin is 0.5 mm, and the width is 10 mm.

[0035] 2. A method for preparing a low-hydrogen flux-cored welding wire suitable for high-strength steel, said method comprising the steps of:

[0036] S1: Preparation of powder

[0037]1) Drying: After the ingredients in the drug core are made into 100-mesh powder, the non-oxide components are dried at 160°C for 3 hours; the oxide components are first dried at 160°C for 3 hours, and the...

Embodiment 2

[0043] 1. A low-hydrogen flux-cored welding wire suitable for high-strength steel. The flux-cored welding wire is composed of a sheath and a flux core, wherein the sheath is a nickel strip, and the composition of the flux core is calculated by mass percentage: CaF 2 42%, K 2 ZrF 6 6%, LiF 10%, Al12%, Mn 5%, Cr 3%, Mg 6%, Si 1%, B 1%, RE 2 o 3 2%, TiO 4%, CaO 3%, and the balance is Fe. The composition of the nickel strip is calculated by mass percentage: Ni+Co≥99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤0.10%, S≤0.005%. The thickness of the skin is 0.5 mm and the width is 12 mm.

[0044] 2. A method for preparing a low-hydrogen flux-cored welding wire suitable for high-strength steel, said method comprising the steps of:

[0045] S1: Preparation of powder

[0046] 1) Drying: After the ingredients in the drug core are made into 100-mesh powder, the non-oxide components are dried at 160°C for 3 hours; the oxide components are first dried at 170°C for 3 hours, and t...

Embodiment 3

[0052] 1. A low-hydrogen flux-cored welding wire suitable for high-strength steel. The flux-cored welding wire is composed of a sheath and a flux core, wherein the sheath is a nickel strip, and the composition of the flux core is calculated by mass percentage: CaF 2 40%, K 2 ZrF 6 5%, LiF 10%, Al10%, Mn 7%, Cr 3.5%, Mg 7%, Si 2%, B 2%, RE 2 o 3 2%, TiO 4%, CaO 3.5%, and the balance is Fe. The composition of the nickel strip is calculated by mass percentage: Ni+Co≥99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤0.10%, S≤0.005%. The skin has a thickness of 0.5mm and a width of 8mm.

[0053] 2. A method for preparing a low-hydrogen flux-cored welding wire suitable for high-strength steel, said method comprising the steps of:

[0054] S1: Preparation of powder

[0055] 1) Drying: After the ingredients in the drug core are made into 100-mesh powder, the non-oxide components are dried at 160°C for 3 hours; the oxide components are first dried at 150°C for 3 hours, and the...

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Abstract

The invention relates to a low-hydrogen flux-cored wire suitable for high-strength steel, and belongs to the preparation field of flux-cored wires. The flux-cored wire is formed by a skin and a core,wherein the skin is a nickel strap; and the core is prepared from the components in percentage by mass: 40 to 65 percent of CaF2, 2 to 10 percent of K2ZrF6, 5 to 15 percent of LiF, 7 to 14 percent ofAl, 5 to 10 percent of Mn, 2 to 5 percent of Cr, 5 to 10 percent of Mg, 0.5 to 5 percent of Si, 0.5 to 5 percent of B, 0.5 to 5 percent of RE2O3, 2 to 7 percent of TiO, 2 to 5 percent of CaO, and thebalance Fe. The flux-cored wire prepared through the invention is excellent in processing property and stable in electric arc combustion, the hydrogen content of deposited metal is low, the quality ofthe welded high-strength steel is stable, and a welding performance of the high-strength steel is greatly improved.

Description

technical field [0001] The invention belongs to the field of preparation of flux-cored welding wire, and in particular relates to a low-hydrogen flux-cored welding wire suitable for high-strength steel and a preparation method thereof. Background technique [0002] Welding technology is an indispensable processing technology in high-quality and high-efficiency manufacturing technology of modern industry. In order to improve efficiency, shorten production cycle and reduce production cost, welding technology is developing rapidly in the direction of automation and precision. The basis of the development of welding technology is the development of welding materials and welding methods. The two complement each other and promote each other. Welding materials have undergone long-term development from light electrodes to thin-coated electrodes, submerged arc welding, gas shielded welding wires, and today's flux-cored welding wires. The appearance of each new material makes the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3605B23K35/40
Inventor 解宏伟盖新清胡强杨敏
Owner QINGDAO RUNQIAN HI TECH CO LTD
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