Gas-shielded flux-cored wire for welding sus316l austenitic stainless steel cryogenic storage containers and equipment

Abstract

The invention discloses a gas-shielded flux-cored wire for welding of a SUS316L austenitic stainless steel deep-cooling low-temperature storage and transportation container and device and the preparation method thereof. The as-shielded flux-cored wire comprises a steel strip and a flux core wrapped in the steel strip, and the flux core comprises the following components of, by weight, 4.25-5.85 parts of natural rutile, 0.8-1.9 parts of quartz sand, 0.7-1.8 parts of sodium titanate, 0.25-0.3 part of sodium fluoride, 0.125-0.275 part of calcined alpha alumina, 0. 27wt% of calcined alpha aluminaand 0.025-0.15 part of nitrogen-containing ferrochromium, 0.085-0.05 part of spray silicon iron, 1.05-1.45 parts of electrolytic manganese, 3.6-4.85 parts of metal chromium, 6.42-6.85 parts of atomized iron powder, 1. 9-2.5 parts of nickel powder, and 1.0-1.35 parts of molybdenum. The gas-shielded flux-cored wire has the advantages that efficient semi-automatic and automatic welding technologies are achieved, the welding efficiency is high, splashing is low, the appearance is attractive, the welding current is wide, and the voltage adaptability strong.

Description

technical field

[0001] The field of welding technology of the present invention, more specifically, relates to a kind of welding wire that meets the corresponding technical requirements of GB / T17853 standard and AWSA5.22 standard E316LT1-1 type flux cored wire, and has high strength and extremely Excellent low-temperature plasticity and toughness are mainly used for welding SUS316L austenitic stainless steel cryogenic storage and transportation containers, equipment (LNG storage tanks, LNG carriers, LNG satellite stations, LNG tankers, ultra-low temperature refrigerators, ultra-low temperature refrigeration equipment, etc.) Flux-cored welding wire and its production process. Background technique

[0002] SUS316L steel is a commonly used austenitic stainless steel, which has been widely used in the LNG industry because of its good comprehensive properties, and the cryogenic welding consumables for SUS316L are mainly manual welding rods and solid welding wires.

[0003] With ...

Examples

Embodiment 1

[0036] Choose the ultra-low carbon stainless steel strip of 76kg, by mass percent, described ultralow carbon stainless steel strip comprises following composition (wt%): C 0.0093, Mn 1.16, Si 0.32, Cr 18.65, Ni 10.84, Cu 0.006, S 0.003, P0.011, N 0.021, Mo 2.55, the balance is Fe and unavoidable impurities.

[0037] The weight of each component in the drug core is as follows: TiO 2 96.52wt%, S 0.022wt%, P 0.027wt% natural rutile 5.85kg; containing SiO 2 99.4wt%, Al 2 o 3 0.8kg of quartz sand with 0.33wt%, S 0.019wt%, P 0.023wt%; containing TiO 2 72.7wt%, NaO 2 1.3kg of sodium titanate with 16.8wt%, S 0.025wt%, P 0.034%; 0.25kg of sodium fluoride containing NaF99.6wt%; containing Al 2 o 3 0.125kg of calcined α-alumina with 98.2wt%, S≤0.017wt%, P≤0.24wt%, nitrogen containing Cr 62.4wt%, N7.4wt%, C 0.044wt%, S 0.023wt%, P 0.027wt% 0.025kg ferrochromium; 0.05kg spray ferrosilicon containing Si 45.0wt%, C 0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn 99.7wt%, C 0.035...

Embodiment 2

[0044] In this example, except that the weights of the components in the flux core are different, other conditions and manufacturing process are the same as those in Example 1 to obtain 2# flux-cored welding wire.

[0045] Wherein, the present embodiment selects 76 kg of ultra-low carbon stainless steel strips, and takes the drug core, and the weight of each component in the drug core is as follows: 2 96.52wt%, S 0.022wt%, P 0.027wt% natural rutile 4.9kg; containing SiO 2 99.4wt%, Al 2 o 3 0.33wt%, S 0.019wt%, P 0.023wt% quartz sand 1.2kg; containing TiO 2 72.7wt%, NaO 2 0.7kg of sodium titanate with 16.8wt%, S 0.025wt%, P 0.034%; 0.25kg of sodium fluoride containing NaF 99.6wt%; containing Al 2 o 3 98.2wt%, S≤0.017wt%, P≤0.24wt% calcined α-alumina 0.21kg; nitrogen containing Cr62.4wt%, N7.4wt%, C 0.044wt%, S 0.023wt%, P 0.027wt% 0.15kg ferrochrome; 0.04kg spray ferrosilicon containing Si 45.0wt%, C0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn 99.7wt%, C 0.035wt%,...

Embodiment 3

[0049] In this example, except that the weights of the components in the flux core are different, other conditions and manufacturing process are the same as those in Example 1, and 3# flux-cored welding wire is obtained.

[0050] Wherein, the present embodiment selects 76 kg of ultra-low carbon stainless steel strips, and takes the drug core, and the weight of each component in the drug core is as follows: 4.25 kg of natural rutile containing TiO2 96.52wt%, S 0.022wt%, P 0.027wt%; 1.9kg of quartz sand with SiO2 99.4wt%, Al2O3 0.33wt%, S 0.019wt%, P 0.023wt%; 1.8kg of sodium titanate containing TiO2 72.7wt%, NaO2 16.8wt%, S 0.025wt%, P 0.034% ; 0.3kg of sodium fluoride containing NaF 99.6wt%; 0.275kg of calcined α-alumina containing Al2O3 98.2wt%, S ≤ 0.017wt%, P ≤ 0.24wt%; containing Cr62.4wt%, N7.4wt%, C 0.12kg of ferrochrome nitride with 0.044wt%, S 0.023wt%, P 0.027wt%; 0.085kg of sprayed ferrosilicon containing Si 45.0wt%, C0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn ...

technical field

[0001] The field of welding technology of the present invention, more specifically, relates to a kind of welding wire that meets the corresponding technical requirements of GB / T17853 standard and AWSA5.22 standard E316LT1-1 type flux cored wire, and has high strength and extremely Excellent low-temperature plasticity and toughness are mainly used for welding SUS316L austenitic stainless steel cryogenic storage and transportation containers, equipment (LNG storage tanks, LNG carriers, LNG satellite stations, LNG tankers, ultra-low temperature refrigerators, ultra-low temperature refrigeration equipment, etc.) Flux-cored welding wire and its production process. Background technique

[0002] SUS316L steel is a commonly used austenitic stainless steel, which has been widely used in the LNG industry because of its good comprehensive properties, and the cryogenic welding consumables for SUS316L are mainly manual welding rods and solid welding wires.

[0003] With ...

Examples

Embodiment 1

[0036] Choose the ultra-low carbon stainless steel strip of 76kg, by mass percent, described ultralow carbon stainless steel strip comprises following composition (wt%): C 0.0093, Mn 1.16, Si 0.32, Cr 18.65, Ni 10.84, Cu 0.006, S 0.003, P0.011, N 0.021, Mo 2.55, the balance is Fe and unavoidable impurities.

[0037] The weight of each component in the drug core is as follows: TiO 2 96.52wt%, S 0.022wt%, P 0.027wt% natural rutile 5.85kg; containing SiO 2 99.4wt%, Al 2 o 3 0.8kg of quartz sand with 0.33wt%, S 0.019wt%, P 0.023wt%; containing TiO 2 72.7wt%, NaO 2 1.3kg of sodium titanate with 16.8wt%, S 0.025wt%, P 0.034%; 0.25kg of sodium fluoride containing NaF99.6wt%; containing Al 2 o 3 0.125kg of calcined α-alumina with 98.2wt%, S≤0.017wt%, P≤0.24wt%, nitrogen containing Cr 62.4wt%, N7.4wt%, C 0.044wt%, S 0.023wt%, P 0.027wt% 0.025kg ferrochromium; 0.05kg spray ferrosilicon containing Si 45.0wt%, C 0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn 99.7wt%, C 0.035...

Embodiment 2

[0044] In this example, except that the weights of the components in the flux core are different, other conditions and manufacturing process are the same as those in Example 1 to obtain 2# flux-cored welding wire.

[0045] Wherein, the present embodiment selects 76 kg of ultra-low carbon stainless steel strips, and takes the drug core, and the weight of each component in the drug core is as follows: 2 96.52wt%, S 0.022wt%, P 0.027wt% natural rutile 4.9kg; containing SiO 2 99.4wt%, Al 2 o 3 0.33wt%, S 0.019wt%, P 0.023wt% quartz sand 1.2kg; containing TiO 2 72.7wt%, NaO 2 0.7kg of sodium titanate with 16.8wt%, S 0.025wt%, P 0.034%; 0.25kg of sodium fluoride containing NaF 99.6wt%; containing Al 2 o 3 98.2wt%, S≤0.017wt%, P≤0.24wt% calcined α-alumina 0.21kg; nitrogen containing Cr62.4wt%, N7.4wt%, C 0.044wt%, S 0.023wt%, P 0.027wt% 0.15kg ferrochrome; 0.04kg spray ferrosilicon containing Si 45.0wt%, C0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn 99.7wt%, C 0.035wt%,...

Embodiment 3

[0049] In this example, except that the weights of the components in the flux core are different, other conditions and manufacturing process are the same as those in Example 1, and 3# flux-cored welding wire is obtained.

[0050] Wherein, the present embodiment selects 76 kg of ultra-low carbon stainless steel strips, and takes the drug core, and the weight of each component in the drug core is as follows: 4.25 kg of natural rutile containing TiO2 96.52wt%, S 0.022wt%, P 0.027wt%; 1.9kg of quartz sand with SiO2 99.4wt%, Al2O3 0.33wt%, S 0.019wt%, P 0.023wt%; 1.8kg of sodium titanate containing TiO2 72.7wt%, NaO2 16.8wt%, S 0.025wt%, P 0.034% ; 0.3kg of sodium fluoride containing NaF 99.6wt%; 0.275kg of calcined α-alumina containing Al2O3 98.2wt%, S ≤ 0.017wt%, P ≤ 0.24wt%; containing Cr62.4wt%, N7.4wt%, C 0.12kg of ferrochrome nitride with 0.044wt%, S 0.023wt%, P 0.027wt%; 0.085kg of sprayed ferrosilicon containing Si 45.0wt%, C0.087wt%, S 0.011wt%, P 0.031wt%; containing Mn ...