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Matched flux-cored wire for medical gas and vacuum seamless copper pipe fusion welding

A flux-cored welding wire and vacuum technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem that the tensile strength and elongation of the deposited metal cannot meet the requirements of use, and the chemical composition of the deposited metal Inhomogeneity, poor air tightness of deposited metal, etc., to avoid element enrichment or loss, easy to uniform distribution, and promote the effect of alloy homogenization

Active Publication Date: 2020-12-15
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a matching flux-cored wire for fusion welding of seamless copper tubes for medical gas and vacuum, which can solve the following technical problems: ①The chemical composition of the deposited metal is not uniform, and there are pores, inclusions, cracks, and looseness in the deposited metal Defects; ② The air tightness of the deposited metal is poor; ③ The tensile strength and elongation of the deposited metal cannot meet the requirements of use

Method used

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  • Matched flux-cored wire for medical gas and vacuum seamless copper pipe fusion welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A matching flux-cored wire for fusion welding of seamless copper tubes for medical gas and vacuum, including a flux core and a sheath, the chemical composition and dosage of the flux core are calculated by mass percentage: 2.1% of CuSi16 powder, 2.2% of CuMn30 powder, and CuP12 powder 1.5%, AlSr40 powder 3.0%, nano F 3 Ti powder 2.8%, nanometer NdF 3 Powder 3.2%, the balance is FTD1 electrolytic copper powder; the outer skin is made of TU1 copper alloy strip.

[0036] The 100 mesh pass rate of CuSi16 powder, CuMn30 powder, CuP12 powder and AlSr40 powder is 100%.

[0037] Nano F 3The particle size range of Ti powder is 30nm-80nm.

[0038] Nano-NdF 3 The particle size range of the powder is 30nm-80nm.

[0039] The 200 mesh pass rate of FTD1 electrolytic copper powder is 100%, and the 300 mesh pass rate is 95%.

[0040] The thickness of the TU1 copper alloy strip is 0.5mm.

[0041] The state of TU1 copper alloy strip is semi-hard.

[0042] The filling rate of the d...

Embodiment 2

[0050] A matching flux-cored wire for fusion welding of seamless copper tubes for medical gas and vacuum, including a flux core and a sheath, the chemical composition and dosage of the flux core are calculated by mass percentage: CuSi16 powder 3.2%, CuMn30 powder 3.0%, CuP12 powder 2.2%, AlSr40 powder 3.8%, nano F 3 Ti powder 3.6%, nanometer NdF 3 Powder 4.5%, the balance is FTD1 electrolytic copper powder, and the outer skin is made of TU1 copper alloy strip.

[0051] The 100 mesh pass rate of CuSi16 powder, CuMn30 powder, CuP12 powder and AlSr40 powder is 100%.

[0052] Nano F 3 The particle size range of Ti powder is 30nm-80nm.

[0053] Nano-NdF 3 The particle size range of the powder is 30nm-80nm.

[0054] The 200 mesh pass rate of FTD1 electrolytic copper powder is 100%, and the 300 mesh pass rate is 95%.

[0055] The thickness of the TU1 copper alloy strip is 1.5mm.

[0056] The state of TU1 copper alloy strip is semi-hard.

[0057] The filling rate of the drug c...

Embodiment 3

[0060] A matching flux-cored wire for fusion welding of seamless copper tubes for medical gas and vacuum, including a flux core and a sheath, the chemical composition and dosage of the flux core are calculated by mass percentage: 2.6% of CuSi16 powder, 2.6% of CuMn30 powder, and CuP12 powder 1.8%, AlSr40 powder 3.4%, nano F 3 Ti powder 3.2%, nanometer NdF 3 Powder 3.8%, the balance is FTD1 electrolytic copper powder; the outer skin is made of TU1 copper alloy strip.

[0061] The 100 mesh pass rate of CuSi16 powder, CuMn30 powder, CuP12 powder and AlSr40 powder is 100%.

[0062] Nano F 3 The particle size range of Ti powder is 30nm-80nm.

[0063] Nano-NdF 3 The particle size range of the powder is 30nm-80nm.

[0064] The 200 mesh pass rate of FTD1 electrolytic copper powder is 100%, and the 300 mesh pass rate is 95%.

[0065] The thickness of the TU1 copper alloy strip is 1.0mm.

[0066] The state of TU1 copper alloy strip is semi-hard.

[0067] The filling rate of the ...

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Abstract

The invention belongs to the field of welding materials, and particularly relates to a matched flux-cored wire for medical gas and vacuum seamless copper pipe fusion welding. The matched flux-cored wire comprises a TU1 semi-hard copper alloy sheath and a flux core; the flux core comprises 2.1%-3.2% of CuSi16 powder, 2.2%-3.0% of CuMn30 powder, 1.5%-2.2% of CuP12 powder, 3.0%-3.8% of AlSr40 powder,2.8%-3.6% of nanometer F3Ti powder, 3.2%-4.5% of nanometer NdF3 powder, and the balance FTD1 electrolytic copper powder; and the filling rate of the flux core is 32%-38%. Chemical components of deposited metal are uniform, inclusion, cracks and air hole defects are avoided, the air tightness is good, the minimum value of the tensile strength of the deposited metal is 306 MPa, the minimum value ofthe percentage elongation after fracture is 31.6%, and a component formed by fusion welding the seamless copper pipe completely meets the medical gas and vacuum requirements.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a matching flux-cored welding wire for fusion welding of seamless copper tubes for medical gas and vacuum. Background technique [0002] During the transportation of medical gas from the gas source to the terminal, in order to avoid changes in the quality of medical gas caused by leakage, pollution and other factors, the gas pipeline should have good cleanliness, corrosion resistance and airtightness. Due to the safety and hygiene requirements of transportation, as well as the particularity and importance of the transportation medium, medical gas pipelines are different from common public pipelines; seamless copper tubes for vacuum require very high air tightness, and the non-ferrous metal industry The standard YS / T 650-2007 "Seamless Copper Tubes for Medical Gas and Vacuum" provides detailed regulations for such tubes. [0003] At present, most of the seam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K35/40
CPCB23K35/0266B23K35/302B23K35/406
Inventor 刘胜新陈永潘继民吴书菲马贺祥付雅迪王靖博连明洋王朋旭孙华为
Owner ZHENGZHOU UNIV
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