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Flux cored wire for ultra-low temperature stainless steel welding

A technology of flux-cored welding wire and stainless steel, applied in welding equipment, welding medium, welding/cutting medium/material, etc., to achieve the effect of strong corrosion resistance, excellent ultra-low temperature impact toughness, and good crack resistance

Active Publication Date: 2022-04-15
BEIJING JINWEI WELDING MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found that there are some or some deficiencies in the above-mentioned welding wires.

Method used

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  • Flux cored wire for ultra-low temperature stainless steel welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Embodiment 1: Preparation of flux-cored welding wire

[0110] The drug core powder is filled in the stainless steel strip (304L stainless steel) with a filling rate of 20%, and the contained drug core mass percentage composition is as follows:

[0111] 17% metal chromium powder, 10% metal nickel powder, 10% metal manganese powder, 23% rutile, 4% silicon-calcium alloy,

[0112] 6% feldspar, 5% quartz, 2% rare earth fluoride, 2% chromium nitride powder, 2% aluminum-magnesium alloy,

[0113] The rest is iron powder so that it is added to 100%.

[0114] After the flux-cored wire is rolled and drawn into the flux-cored wire by the flux-cored wire production line, the flux-cored wire uses a variety of shielding gases (100% CO 2 Gas, 80% Ar+20% CO 2 Mixed gas, 100% Ar) are used to weld various stainless steels (304L, 316L, 904L), and the chemical composition of the deposited metal after welding is within the following range: C≤0.025%, Si≤ 0.8%, Mn is 1.0-2.5%, P≤0.03%, S...

Embodiment 2

[0115] Embodiment 2: Preparation of flux-cored welding wire

[0116] The drug core powder is filled in the stainless steel strip (316L stainless steel) with a filling rate of 22%, and the contained drug core mass percentage composition is as follows:

[0117] 20% metal chromium powder, 9% metal nickel powder, 7% metal manganese powder, 20% rutile, 3% silicon-calcium alloy,

[0118] 3% feldspar, 4% quartz, 3% rare earth fluoride, 3% chromium nitride powder, 3% aluminum-magnesium alloy,

[0119] The rest is iron powder so that it is added to 100%.

[0120] After the flux-cored wire is rolled and drawn into the flux-cored wire by the flux-cored wire production line, the flux-cored wire uses a variety of shielding gases (100% CO 2 Gas, 80% Ar+20% CO 2 Mixed gas, 100% Ar) are used to weld various stainless steels (304L, 316L, 904L), and the chemical composition of the deposited metal after welding is within the following range: C≤0.025%, Si≤ 0.8%, Mn is 1.0-2.5%, P≤0.03%, S≤0...

Embodiment 3

[0121] Embodiment 3: Preparation of flux-cored welding wire

[0122] The drug core powder is filled in the stainless steel strip (904L stainless steel) with a filling rate of 23%, and the contained drug core mass percentage composition is as follows:

[0123] 15% metal chromium powder, 6% metal nickel powder, 4% metal manganese powder, 25% rutile, 2% silicon-calcium alloy,

[0124] 5% feldspar, 3% quartz, 1% rare earth fluoride, 5% chromium nitride powder, 3% aluminum-magnesium alloy,

[0125] The rest is iron powder so that it is added to 100%.

[0126] After the flux-cored wire is rolled and drawn into the flux-cored wire by the flux-cored wire production line, the flux-cored wire uses a variety of shielding gases (100% CO 2 Gas, 80% Ar+20% CO 2 Mixed gas, 100% Ar) are used to weld various stainless steels (304L, 316L, 904L), and the chemical composition of the deposited metal after welding is within the following range: C≤0.025%, Si≤ 0.8%, Mn is 1.0-2.5%, P≤0.03%, S≤0...

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Abstract

The invention relates to a flux-cored welding wire for ultra-low temperature stainless steel welding. Specifically, the flux-cored welding wire for ultra-low temperature stainless steel welding involved in the present invention is composed of flux core powder and a stainless steel strip wrapping the flux core powder. The core powder accounts for 15-25% of the total weight of the flux-cored wire, and the core powder contains the following weight ratio components: 15-20 parts by weight of metallic chromium powder, 6-10 parts by weight of metallic nickel powder , 4-10 parts by weight of manganese metal powder, 20-25 parts by weight of rutile, 2-4 parts by weight of silicon-calcium alloy, 3-6 parts by weight of feldspar, 3-5 parts by weight of quartz, rare earth fluoride, 2-2 parts by weight of aluminum-magnesium alloy 4 parts by weight, and an appropriate amount of optional iron powder are added to the drug core powder to make a total of 100 parts by weight. The invention also relates to a preparation method of the flux-cored welding wire. The flux-cored welding wire suitable for ultra-low temperature stainless steel welding provided by the invention can well improve welding processability and welding efficiency, and the weld metal has stable and excellent -196°C ultra-low temperature impact toughness.

Description

technical field [0001] The invention belongs to the field of welding materials and relates to a flux-cored welding wire for stainless steel welding, in particular to a flux-cored welding wire suitable for ultra-low temperature stainless steel welding. The flux-cored welding wire suitable for ultra-low temperature stainless steel welding provided by the invention can well improve welding manufacturability and welding efficiency, and the weld metal has stable and excellent ultra-low temperature (-196°C) impact toughness. Background technique [0002] With the development of modern industry and equipment technology, in addition to the conventional corrosion resistance, strength, oxidation resistance and other properties required for stainless steel welding consumables, some occasions also require good toughness at ultra-low temperature (-196°C). Under low temperature, it can effectively prevent the occurrence of brittle fracture accidents. For example, in the construction and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3086
Inventor 李伟王立志王磊朱海滨曲维春李柱
Owner BEIJING JINWEI WELDING MATERIAL
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