CN109623194A - A kind of hydrogen controlled electrode for the welding of ultralow temperature potassium steel manual arc - Google Patents
A kind of hydrogen controlled electrode for the welding of ultralow temperature potassium steel manual arc Download PDFInfo
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- CN109623194A CN109623194A CN201910008172.6A CN201910008172A CN109623194A CN 109623194 A CN109623194 A CN 109623194A CN 201910008172 A CN201910008172 A CN 201910008172A CN 109623194 A CN109623194 A CN 109623194A
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- welding
- ferrosilicon
- potassium steel
- chemical constituent
- ultralow temperature
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a kind of hydrogen controlled electrodes for the welding of ultralow temperature potassium steel manual arc, including welding rod core and coating, the chemical constituent of welding rod core is: C:0.30-0.75wt%, Mn:20-26wt%, Ni:6.5-8.5wt%, Cr:3.0-5.5wt%, W:2.5-4.0wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；The chemical constituent of its coating is: marble is 35 ~ 40wt%, 16 ~ 22wt% of fluorite, 3 ~ 5wt% of quartz sand, 3 ~ 6wt% of zircon sand, 4 ~ 10wt% of rutile, 5 ~ 10wt% of ferrotianium, 5 ~ 8wt% of low-carbon ferromanganese, 3 ~ 6wt% of ferrosilicon, 1 ~ 2wt% of rare earth ferrosilicon, 2 ~ 3wt% of synthetic mica, 1 ~ 2wt% of soda ash, weight percentage of each component and be 100%, the present invention is formed by weld metal excellent in low temperature toughness, intensity matches with ultralow temperature potassium steel, is able to satisfy to being welded suitable for the intensity of ultralow temperature potassium steel and the technical requirements of ultralow-temperature flexibility.
Description
Technical field
The present invention relates to a kind of hydrogen controlled electrodes for the welding of ultralow temperature potassium steel manual arc.
Background technique
It is low for liquefied natural gas (LNG) etc. in coming few decades with the "Oceanic" strategy and new energy implementation
The steel material of temperature or ultralow temperature storage shipping container, demand will will appear the trend being gradually increasing.At this stage, it is used for LNG
The steel of basin is business 9Ni steel, and since nickel content is up to 9%, steel plate is expensive.To save Ni resource, reducing steel material
Cost and the energy storage and transportation cost, scientific research personnel be actively developed ultralow temperature potassium steel.
In application process, when manufacturing structure and equipment using welding procedure, manual arc welding is ultralow temperature potassium steel
Common welding method, and currently without the manual electric arc welding to match with high manganese low-temperature steel.In engineering practice, according to
The identical welding rod of 9Ni steel, it is nickel-base welding rod that 9Ni steel, which is applied at most, there are problems that two: first, nickel element content in welding wire
It is 50 ~ 60%, it is expensive；Second, base material and welding wire at heterogeneity system is belonged to, alloy content difference is larger, can draw
Elements diffusion at welding point melt run is played, microstructure and property changes.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of for surpassing for the above disadvantage of the existing technology
The hydrogen controlled electrode of low temperature potassium steel manual arc welding, it is at low cost, alloying component system is simple, it is formed by weld metal
Excellent in low temperature toughness, intensity match with ultralow temperature potassium steel, are able to satisfy and are suitable for the strong of ultralow temperature potassium steel to what is welded
The technical requirements of degree and ultralow-temperature flexibility.
The technical solution that the present invention solves the above technical problem is: a kind of hydrogen controlled electrode of ultralow temperature potassium steel, including
Welding rod core and coating, it is characterised in that: the chemical constituent of welding rod core is: C:0.30-0.75wt%, Mn:20-26wt%, Ni:6.5-
8.5wt%, Cr:3.0-5.5wt%, W:2.5-4.0wt%, P≤0.002wt%, S≤0.001wt%, surplus is for Fe and unavoidably
Impurity；
The chemical constituent of its coating is: marble be 35 ~ 40wt%, 16 ~ 22wt% of fluorite, 3 ~ 5wt% of quartz sand, zircon sand 3 ~
6wt%, 4 ~ 10wt% of rutile, 5 ~ 10wt% of ferrotianium, 5 ~ 8wt% of low-carbon ferromanganese, 3 ~ 6wt% of ferrosilicon, rare earth 1 ~ 2wt% of ferrosilicon, synthesis
2 ~ 3wt% of mica, 1 ~ 2wt% of soda ash, weight percentage of each component and be 100%.
The present invention provides a kind of hydrogen controlled electrode preparation process for the welding of ultralow temperature potassium steel manual arc, specifically
Are as follows:
S1: the powder of raw material is uniformly mixed according to the above component formula, binder is then added, medicinal powder and binder are mixed
It closes；
S2: medicinal powder and binder mixtures are pressed into cylindrical powder ball and are put into extrusion press, core wire is placed on sending for extrusion press
On silk platform, extrusion is run,
S3: welding rod semi-finished product are dried 2 hours through 180 DEG C again after room temperature is dried, are prepared into welding rod.
Metal powder-cored wire of the present invention welds method by manual arc and welds for ultralow temperature potassium steel, weldering
It is as follows to connect technological parameter: weldering before does not preheat, interlayer temperature≤180 DEG C, welding current 189-190A, arc voltage be 24 ~
25V, speed of welding 2.19-2.35cm/s, weld heat input are 20 ~ 21kJ/cm；
The mechanical property of ultralow temperature steel of the present invention for welding is: tensile strength is >=400MPa, yield strength is >=
560MPa, elongation percentage A=40%；Impact energy Ak v >=54J at -20196 DEG C.
The present invention further limits scheme:
The chemical constituent of its welding rod core above-mentioned is: C 0.4wt%, Mn 26wt%, Ni 7wt%, W 2.9wt%, Cr are
5.2wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 36wt%, fluorite 22wt%, quartz sand 4wt%, zircon sand 4.5wt%, rutile
6wt%, ferrotianium 10wt%, low-carbon ferromanganese 6wt%, ferrosilicon 6wt%, rare earth ferrosilicon 1.4wt%, synthetic mica 2.9wt%, soda ash
1.2wt%, weight percentage of each component and be 100%.
The chemical constituent of its welding rod core above-mentioned is: C 0.55wt%, Mn 23.9wt%, Ni 7.7wt%, W are
3.4wt%, Cr 4.3wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 38.5wt%, fluorite 20.5wt%, quartz sand 4.9wt%, zircon sand 4.6wt%, gold
Red stone 6.8wt%, ferrotianium 7.9wt%, low-carbon ferromanganese 6.8wt%, ferrosilicon 4.5wt%, rare earth ferrosilicon 1.6wt%, synthetic mica
2.4wt%, soda ash 1.5wt%, weight percentage of each component and be 100%.
The chemical constituent of its welding rod core above-mentioned is: C 0.7wt%, Mn 21.6wt%, Ni 8.1wt%, Cr are
3.4wt%, W 3.9wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 39.6wt%, fluorite 17.6wt%, quartz sand 4.6wt%, zircon sand 5.5wt%, gold
Red stone 9.5wt%, ferrotianium 5.7wt%, low-carbon ferromanganese 7.8wt%, ferrosilicon 3.8wt%, rare earth ferrosilicon 1.9wt%, synthetic mica
2.2wt%, soda ash 1.8wt%, weight percentage of each component and be 100%.
The beneficial effects of the present invention are:
The alloying element content price that the present invention uses is low and alloying component system is simple, and preparation cost is low；The main conjunction used
The content of gold element Mn is 20 ~ 26wt%, and the weld metal of formation is suitable with the manganese content of ultralow temperature potassium steel, be ensure that and mother
The essentially identical component system of material, when forming welding point, avoid manganese element diffusion be formed by it is microcosmic near melt run
The variation of tissue and mechanical property；
Manganese element and carbon, nickel element in the present invention are all austenite former, and collective effect is in weld metal molten bath
When solidification, it is solidification initial phase with austenite phase, and be always maintained at room temperature, forms the weld metal of austenite structure.Make to weld
Seam metal is provided with the mechanical property to match with base material；
The present invention adds the wolfram element of 2.5 ~ 4.0wt%, to reduce solidification temperature range, to efficiently reduce and avoid and is solidifying
Gu the appearance of crackle；In addition, the presence of impurity element sulphur and phosphorus, makes weld metal generate liquation crack and reheat crack(ing), therefore originally
The content of invention strict control sulphur, P elements: P≤0.002wt% and S≤0.001wt%；
The present invention add 35 ~ 40% marble, 16 ~ 22% fluorite, marble both can gas making, can also slag making, decomposite
Gas can improve the blowing force to molten drop, reduce and splash, and the CaO of generation can stablize electric arc, it may have good desulphurizing ability；Firefly
Stone can also make slag former, while the effect highly significant of fluorite removal hydrogen blistering, and dehydrogenation reaction can occur in molten pool metal
It generates the HF insoluble in metal to take away H, the diffusible hydrogen content in deposited metal is reduced, with the raising of fluorite content, weld seam
Hydrogen content is reduced in metal；In addition, there is best operative weldability when the ratio between marble and fluorite are between 1 ~ 3,
Arc stability, splashing are small, and appearance of weld is good；
The chemical component system that the present invention uses, makes weld structure full austenite, and it is excellent not only to ensure that weld metal has
Good ultralow-temperature flexibility and there is enough intensity, and reduce solidification temperature range, avoids the appearance of solidification cracking, reduce simultaneously
Or prevent the generation of liquation crack and reheat crack(ing)；The present invention use coating chemical component system, arc stability, splash it is small,
Desulphurizing ability is strong, hydrogen content is small, and surface forming is good, has excellent welding technological properties；
The welding hydrogen controlled electrode of manual arc prepared by the present invention, for the welding of ultralow temperature potassium steel, weld metal shape
At fully austenitic structure, excellent ultralow-temperature flexibility not only ensure that, Impact energy Ak v is 75 ~ 102J at -196 DEG C；Also it ensure that
Enough intensity: yield strength is 410 ~ 452MPa, and tensile strength is 580 ~ 698MPa, and elongation percentage A is 38 ~ 42%, is realized super
The mechanical property requirements of low temperature potassium steel and the requirement of ultralow-temperature flexibility.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of manual arc welding hydrogen controlled electrode suitable for ultralow temperature potassium steel, including welding rod core and
The chemical constituent of coating, welding rod core is: C 0.4wt%, Mn 26wt%, Ni 7wt%, W 2.9wt%, Cr 5.2wt%, P
≤ 0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 36wt%, fluorite 22wt%, quartz sand 4wt%, zircon sand 4.5wt%, rutile
6wt%, ferrotianium 10wt%, low-carbon ferromanganese 6wt%, ferrosilicon 6wt%, rare earth ferrosilicon 1.4wt%, synthetic mica 2.9wt%, soda ash
1.2wt%, weight percentage of each component and be 100%.
Test and analyze to the weld metal microstructure and mechanical property of the present embodiment postwelding: weld metal is complete difficult to understand
Family name's body tissue；There is no solidification cracking and reheat crack(ing) to generate；The yield strength of weld metal is 452MPa, and tensile strength is
689MPa, elongation A=37%, ballistic work average value Akv=80J at -196 DEG C.
Embodiment 2
The present embodiment provides a kind of manual arc welding hydrogen controlled electrode suitable for ultralow temperature potassium steel, including welding rod core and
The chemical constituent of coating, welding rod core is: C 0.55wt%, Mn 23.9wt%, Ni 7.7wt%, W 3.4wt%, Cr are
4.3wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 38.5wt%, fluorite 20.5wt%, quartz sand 4.9wt%, zircon sand 4.6wt%, gold
Red stone 6.8wt%, ferrotianium 7.9wt%, low-carbon ferromanganese 6.8wt%, ferrosilicon 4.5wt%, rare earth ferrosilicon 1.6wt%, synthetic mica
2.4wt%, soda ash 1.5wt%, weight percentage of each component and be 100%.
Test and analyze to the weld metal microstructure and mechanical property of the present embodiment postwelding: weld metal is complete difficult to understand
Family name's body tissue；There is no solidification cracking and reheat crack(ing) to generate；The yield strength of weld metal is 433MPa, and tensile strength is
643MPa, elongation A=39%, ballistic work average value Akv=83J at -196 DEG C.
Embodiment 3
The present embodiment provides a kind of manual arc welding hydrogen controlled electrode suitable for ultralow temperature potassium steel, including welding rod core and
The chemical constituent of coating, welding rod core is: C 0.7wt%, Mn 21.6wt%, Ni 8.1wt%, Cr 3.4wt%, W are
3.9wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 39.6wt%, fluorite 17.6wt%, quartz sand 4.6wt%, zircon sand 5.5wt%, gold
Red stone 9.5wt%, ferrotianium 5.7wt%, low-carbon ferromanganese 7.8wt%, ferrosilicon 3.8wt%, rare earth ferrosilicon 1.9wt%, synthetic mica
2.2wt%, soda ash 1.8wt%, weight percentage of each component and be 100%.
Test and analyze to the weld metal microstructure and mechanical property of the present embodiment postwelding: weld metal is complete difficult to understand
Family name's body tissue；There is no solidification cracking and reheat crack(ing) to generate；The yield strength of weld metal is 413MPa, and tensile strength is
600MPa, elongation A=41.5%, ballistic work average value Akv=93J at -196 DEG C.
The present embodiment 1-3 is the results showed that using the electricity manufactured in the present embodiment by hand suitable for ultralow temperature potassium steel
Arc welding hydrogen controlled electrode, manually after electric arc welding, the mechanical property of weld metal fully meets ultralow temperature potassium steel
Technical requirements, welding point meets the technical requirements of ultralow temperature potassium steel preparation structure.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (4)
1. a kind of hydrogen controlled electrode for the welding of ultralow temperature potassium steel manual arc, including welding rod core and coating, feature exist
In: the chemical constituent of its welding rod core is: C:0.30-0.75wt%, Mn:20-26wt%, Ni:6.5-8.5wt%, Cr:3.0-
5.5wt%, W:2.5-4.0wt%, P≤0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
The chemical constituent of its coating is: marble be 35 ~ 40wt%, 16 ~ 22wt% of fluorite, 3 ~ 5wt% of quartz sand, zircon sand 3 ~
6wt%, 4 ~ 10wt% of rutile, 5 ~ 10wt% of ferrotianium, 5 ~ 8wt% of low-carbon ferromanganese, 3 ~ 6wt% of ferrosilicon, rare earth 1 ~ 2wt% of ferrosilicon, synthesis
2 ~ 3wt% of mica, 1 ~ 2wt% of soda ash, weight percentage of each component and be 100%.
2. the hydrogen controlled electrode according to claim 1 for the welding of ultralow temperature potassium steel manual arc, it is characterised in that:
The chemical constituent of its welding rod core is: C 0.4wt%, Mn 26wt%, Ni 7wt%, W 2.9wt%, Cr 5.2wt%, P≤
0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 36wt%, fluorite 22wt%, quartz sand 4wt%, zircon sand 4.5wt%, rutile
6wt%, ferrotianium 10wt%, low-carbon ferromanganese 6wt%, ferrosilicon 6wt%, rare earth ferrosilicon 1.4wt%, synthetic mica 2.9wt%, soda ash
1.2wt%, weight percentage of each component and be 100%.
3. the hydrogen controlled electrode according to claim 1 for the welding of ultralow temperature potassium steel manual arc, it is characterised in that:
The chemical constituent of its welding rod core is: C 0.55wt%, Mn 23.9wt%, Ni 7.7wt%, W 3.4wt%, Cr 4.3wt%, P
≤ 0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 38.5wt%, fluorite 20.5wt%, quartz sand 4.9wt%, zircon sand 4.6wt%, gold
Red stone 6.8wt%, ferrotianium 7.9wt%, low-carbon ferromanganese 6.8wt%, ferrosilicon 4.5wt%, rare earth ferrosilicon 1.6wt%, synthetic mica
2.4wt%, soda ash 1.5wt%, weight percentage of each component and be 100%.
4. the hydrogen controlled electrode according to claim 1 for the welding of ultralow temperature potassium steel manual arc, it is characterised in that:
The chemical constituent of its welding rod core is: C 0.7wt%, Mn 21.6wt%, Ni 8.1wt%, Cr 3.4wt%, W 3.9wt%, P
≤ 0.002wt%, S≤0.001wt%, surplus are Fe and inevitable impurity；
Its coating chemical constituent are as follows: marble 39.6wt%, fluorite 17.6wt%, quartz sand 4.6wt%, zircon sand 5.5wt%, gold
Red stone 9.5wt%, ferrotianium 5.7wt%, low-carbon ferromanganese 7.8wt%, ferrosilicon 3.8wt%, rare earth ferrosilicon 1.9wt%, synthetic mica
2.2wt%, soda ash 1.8wt%, weight percentage of each component and be 100%.
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| CN201910008172.6A CN109623194A (en) | 2019-01-04 | 2019-01-04 | A kind of hydrogen controlled electrode for the welding of ultralow temperature potassium steel manual arc |
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| CN201910008172.6A CN109623194A (en) | 2019-01-04 | 2019-01-04 | A kind of hydrogen controlled electrode for the welding of ultralow temperature potassium steel manual arc |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340566A (en) * | 2019-06-25 | 2019-10-18 | 钢铁研究总院 | A kind of nickel-base welding rod and its preparation method and application |
| CN110977241A (en) * | 2019-11-18 | 2020-04-10 | 天津大桥焊材集团有限公司 | Low-crack-sensitivity welding rod for welding and repairing high manganese steel |
| CN111590237A (en) * | 2020-05-26 | 2020-08-28 | 南京钢铁股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel and preparation method thereof |
| CN112894197A (en) * | 2021-01-20 | 2021-06-04 | 浙江鸿途焊接科技有限公司 | Manual arc welding electrode for ultralow-temperature high-manganese steel |
| CN113458654A (en) * | 2021-06-30 | 2021-10-01 | 南京钢铁股份有限公司 | Ultralow-temperature high-manganese steel welding wire, welding rod and preparation method thereof |
| CN113547254A (en) * | 2021-07-20 | 2021-10-26 | 武汉铁锚焊接材料股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel |
| CN114193025A (en) * | 2021-12-28 | 2022-03-18 | 武汉科技大学 | High-manganese welding rod special for 25% Mn steel overhead welding |
| CN114227062A (en) * | 2021-12-23 | 2022-03-25 | 锦州公略焊接技术有限公司 | Welding rod deposited metal, welding rod, preparation method and application of welding rod, welding joint and welding method |
| CN116079278A (en) * | 2023-04-06 | 2023-05-09 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340566A (en) * | 2019-06-25 | 2019-10-18 | 钢铁研究总院 | A kind of nickel-base welding rod and its preparation method and application |
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| CN112894197A (en) * | 2021-01-20 | 2021-06-04 | 浙江鸿途焊接科技有限公司 | Manual arc welding electrode for ultralow-temperature high-manganese steel |
| CN113458654A (en) * | 2021-06-30 | 2021-10-01 | 南京钢铁股份有限公司 | Ultralow-temperature high-manganese steel welding wire, welding rod and preparation method thereof |
| CN113547254A (en) * | 2021-07-20 | 2021-10-26 | 武汉铁锚焊接材料股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel |
| CN113547254B (en) * | 2021-07-20 | 2022-09-06 | 武汉铁锚焊接材料股份有限公司 | Arc welding electrode for ultralow-temperature high-manganese steel |
| CN114227062A (en) * | 2021-12-23 | 2022-03-25 | 锦州公略焊接技术有限公司 | Welding rod deposited metal, welding rod, preparation method and application of welding rod, welding joint and welding method |
| CN114227062B (en) * | 2021-12-23 | 2024-02-23 | 锦州公略焊接技术有限公司 | Welding rod for high manganese steel for ultralow temperature of minus 166 ℃ and below, preparation method and application |
| CN114193025A (en) * | 2021-12-28 | 2022-03-18 | 武汉科技大学 | High-manganese welding rod special for 25% Mn steel overhead welding |
| CN116079278A (en) * | 2023-04-06 | 2023-05-09 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
| CN116079278B (en) * | 2023-04-06 | 2023-12-08 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
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Application publication date: 20190416 |
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