CN108788515A - A kind of welding of LPG ships seamless medicine core powder, welding wire for submerged-arc welding and preparation and application - Google Patents
A kind of welding of LPG ships seamless medicine core powder, welding wire for submerged-arc welding and preparation and application Download PDFInfo
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- CN108788515A CN108788515A CN201810386851.2A CN201810386851A CN108788515A CN 108788515 A CN108788515 A CN 108788515A CN 201810386851 A CN201810386851 A CN 201810386851A CN 108788515 A CN108788515 A CN 108788515A
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- welding wire
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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
- B23K35/22—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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention belongs to technical field of welding materials, and in particular to a kind of welding of LPG ships seamless medicine core powder, welding wire for submerged-arc welding and preparation and application.The LPG ships weld seamless medicine core powder, including following component by mass percentage：Metallic nickel 1.2~4.5%, molybdenum-iron 0.3~1.8%, manganese metal 14~20%, rare earth ferrosilicon 1~3%, ferrotianium 0.5~2%, ferro-boron 0.2~0.6%, ferrozirconium 0.2~0.6%, surplus are metallic iron；The present invention also provides a kind of welding wire for submerged-arc welding including above-mentioned medicine core powder, the welding wire is matched with 8 solder flux of F7A (P) for meeting II SFA-5.17 of ASME and is combined, have the characteristics that good anti-moisture absorption, arc stability, appearance of weld are beautiful, craftsmanship is preferable, weld metal low-temperature flexibility is good, crack-resistance sensitivity is good, suitable for LPG ship construction Large Heat Input Weldings, there is larger market promotion prospect and good economic benefit.
Description
Technical field
The invention belongs to technical field of welding materials, and in particular to a kind of welding of LPG ships seamless medicine core powder, welding wire for submerged-arc welding
And preparation and application.
Background technology
With the rapid economic development in our country, LPG (liquefied petroleum gas) exploitations have become the hot spot of China's energy development.And
With the increasing of China's oil shortage of resources and national environmental protection dynamics, liquefied petroleum gas as a kind of clean energy resource increasingly by
Pay attention to, liquefied petroleum gas project flourishes in recent years, and LPG ships are built project and also gradually increased.LPG ships build welding fabrication phase
Mating wlding demand also gradually increases, especially SAW consumable material, at present mainly from South Korea, Japan and other countries import, buying
Cost is higher, and procurement cycle is longer, has certain limitation to act on domestic LPG project implementation.LPG ship construction is welded
Material, domestic correlative study are started late, and have accumulated some experiences at present, but it is still necessary to further improve and improve.
So far, suitable for requiring low-temperature impact toughness and the relevant patent of Large Heat Input Welding may be used not
More, having for retrieving is following：
(1) a kind of seamless submerged arc flux-cored wire (application number for yield strength 550MPa steel：201610653026.5),
The patent of invention is applicable in is more than 550MPa with yield strength, and tensile strength is more than 670MPa, is suitble to the weldering of 550MPa grades of high-strength steel
Connect, the scope of application and deposited metal performance with it is described in the invention different.
(2) a kind of seamless submerged arc flux-cored wire (application number for yield strength 690MPa steel：201610653022.7),
The patent of invention is applicable in is more than 690MPa with yield strength, and tensile strength is more than 770MPa, is suitble to the weldering of 690MPa grades of high-strength steel
It connects, the scope of application and deposited metal performance, and it is described in the invention different.
(3) low-temperature steel flux-cored wire used for submerged arc welding and welding wire (application number：201410730460.X), the patent of invention medicine core
Powder system, the scope of application and deposited metal performance, and it is described in the invention different.
Invention content
For overcome the deficiencies in the prior art and disadvantage, it is used the primary purpose of the present invention is that providing a kind of LPG ships welding
Seamless medicine core powder.
Another object of the present invention is to provide a kind of welding wire for submerged-arc welding, which includes above-mentioned LPG ships welding nothing
Medicine core powder is stitched, which is the seamless submerged arc flux-cored wire of high tenacity that FH40 steel is welded for LPG ships, based on titanium-boron system design
On the basis of thought, suitable austenitic formation and stable element are introduced, there is good anti-moisture absorption, arc stability, appearance of weld
The features such as beautiful, craftsmanship is preferable, and weld metal low-temperature flexibility is good, crack-resistance sensitivity is good, is suitable for LPG ships and builds big line
Energy welds, and cost is less than the similar welding wire for submerged-arc welding of import, has larger market promotion prospect and good economic benefit.
It is still another object of the present invention to provide the preparation methods of above-mentioned welding wire for submerged-arc welding.
Fourth object of the present invention is to provide the application of above-mentioned LPG ships welding seamless medicine core powder and welding wire for submerged-arc welding.
The purpose of the invention is achieved by the following technical solution：
The seamless medicine core powder of a kind of LPG ships welding, including following component by mass percentage：
Metallic nickel 1.2~4.5%, molybdenum-iron 0.3~1.8%, manganese metal 14~20%, rare earth ferrosilicon 1~3%, ferrotianium 0.5
~2%, ferro-boron 0.2~0.6%, ferrozirconium 0.2~0.6%, surplus is metallic iron；
The surplus further includes inevitable impurity；
The mass percent of the metallic nickel is preferably 1.2~1.8%；
The granularity of the metallic nickel is preferably≤80 mesh, and chemical composition is preferably Ni+Co >=95.0wt%, and C≤
0.05wt%, S≤0.005wt%, P≤0.005wt%；
The granularity of the manganese metal is preferably≤80 mesh, and chemical composition is preferably Mn >=97.0wt%, and Si≤
0.40wt%, Fe≤2.0wt%, S≤0.02wt%, P≤0.03wt%；
The granularity of the metallic iron is preferably≤80 mesh, and chemical composition is preferably Fe >=98.0wt%, and C≤
0.05wt%, S≤0.020wt%, P≤0.020wt%；
Granularity preferably≤80 mesh of the molybdenum-iron, rare earth ferrosilicon, ferrotianium, ferro-boron and ferrozirconium；
A kind of welding wire for submerged-arc welding, including above-mentioned LPG ships weld seamless medicine core powder；
It is preferably the 9~15% of welding wire for submerged-arc welding gross mass that the LPG ships, which are welded with the quality of seamless medicine core powder,；
The welding wire for submerged-arc welding also includes crust；
The crust is preferably mild-carbon steel strip；
The preparation method of the welding wire for submerged-arc welding, comprises the following steps：
(1) LPG ships are welded and matches powder with seamless medicine core powder each component and is uniformly mixed, obtained LPG ships and weld seamless medicine
Core powder；
(2) by LPG ships welding made from crust package step (1) with seamless medicine core powder through rolling (soldering of mouth containing steel band),
Tube reducing obtains welding wire for submerged-arc welding；
The welding wire for submerged-arc welding can further drum, packaging, storage；
The diameter of the welding wire for submerged-arc welding is preferably 2.4mm, 3.2mm, 4.0mm or 5.0mm；
The LPG ships weld the application with seamless medicine core powder and welding wire for submerged-arc welding in LPG ship welding fields；
The principle of the present invention：
The main purpose of metallic nickel is the low-temperature flexibility of raising weld metal, followed by improves tensile strength.Nickel conduct
Alloying element has the function of alloy strengthening, toughening matrix.
The main function of molybdenum-iron is to improve the tensile strength of weld metal, while reducing the temper brittleness of weld metal.
Manganese metal main function is deoxidation, while improving the tensile strength of weld metal.Addition is very few, and deoxidation deficiency is held
It is also easy to produce stomata, but the plasticity and toughness of weld seam will be significantly reduced when manganese metal too high levels.
Rare earth ferrosilicon is mainly used for deoxidation, forms Si and Mn combined deoxidations with manganese metal, most of deoxidation products is made to enter
Slag.Rare earth element makes the residual inclusion size in weld metal refine simultaneously, achievees the purpose that inclusion conditioning, promotion group
Knit refinement.
The main purpose of ferrotianium is deoxidation and improves the chemical composition of field trash, the needle-shaped iron of the easy forming core of field trash containing Ti
Ferritic improves low-temperature flexibility.In addition, titanyl compound is considered that stronger hydrogen trap can be formed, a large amount of hydrogen can be cured, to
Effectively reduce the content of deposited metal diffusible hydrogen.
Ti synergy in B and weld seam in ferro-boron, can reach the effect of toughening weld metal.Ti and B in weld seam
Ratio Ti/B controls are advisable 2.5~4.
Ferrozirconium plays outside the deoxidation effect of part, and zr element, which also acts as, promotes acicular ferrite to be formed, the work of Slag inclusion nodularization
With, and then ensure the low-temperature impact toughness of weld metal.
The ratio that the present invention passes through various components in control welding wire so that welding wire for submerged-arc welding obtained has the characteristics that：
(1) in terms of raw material selection, the lower raw material of impurity contents such as P, S are selected as possible, to reduce S, P matter
Transition into deposited metal improves the degree of purity of deposited metal, is conducive to improve its low-temperature flexibility.
(2) in welding wire content ratio amount be adapted to ferrotianium, ferro-boron, ferrozirconium, in the case where different heat inputs weld,
It plays refinement weld metal crystal grain, obtain more acicular ferrite structure, it is ensured that the low-temperature impact toughness of weld joint stable.
(3) contain a certain amount of rare earth ferrosilicon in welding wire.On the one hand rare earth ferrosilicon can improve the removability of slag, on the one hand can be with
Play crystal grain thinning, acicular ferrite in weld seam stabilizing metal improves the effect of weld metal low-temperature flexibility.
(4) contain higher manganese metal in welding wire, good deoxidation effect can be played.
(5) a certain amount of molybdenum-iron is added in welding wire, the temper brittleness of deposited metal can be reduced.
(6) contain appropriate metallic nickel in welding wire, be austenitic formation and stable element, be conducive to improve the low of deposited metal
Warm toughness.
The present invention has the following advantages and effects with respect to the prior art：
(1) craftsmanship is good, and under wider technological specification, arc stability takes off slag and is easy, welding bead beautiful appearance.
(2) welding wire that invention provides is seamless flux-cored wire, and anti-moisture absorption is strong, advantageously reduces the diffusible hydrogen of weld metal
Content.
(3) it is matched with 8 solder flux of F7A (P) for meeting II SFA-5.17 of ASME, deposited metal composition is stablized, and yield strength is big
In 390MPa, tensile strength is more than 510MPa, and elongation percentage is more than 23%, and -60 DEG C of Charpy-V impact powers are more than 100J (lateral expansions
More than 0.5), -75 DEG C of Charpy-V impact powers are more than 60J (lateral expansion is more than 0.5)；Low Temperature Toughness of Deposited Metals is stable, excellent,
It is suitble to the Large Heat Input Welding of big slab.
(4) it is built with LPG ships and uses FH40 base materials, the prosposition of 15~50KJ/cm heat inputs can be suitble to set welding.
(5) it is matched with minor diameter (≤3.2mm) welding wire, is applicable to submerged arc downhand welding, horizontal position welding, horizontal position weldering
Good knitting between welding bead is connect, appearance of weld is good.
(6) it is matched with 8 solder flux of F7A (P) for meeting II SFA-5.17 of ASME, the solid core welding wire with similar chemical composition system
It compares, deposition efficiency is high by 3~9%.
(7) deposited metal composition can carry out flexible modulation in a certain range, compared with solid core welding wire production environmental protection, and at
This is low.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Embodiment 1
The seamless medicine core powder of a kind of LPG ships welding, including following component by mass percentage：
A kind of preparation method of welding wire for submerged-arc welding, comprises the following steps：
(1) LPG ships are welded and matches powder with seamless medicine core powder each component and is uniformly mixed, obtained LPG ships and weld seamless medicine
Core powder；
(2) LPG ships welding made from crust mild-carbon steel strip package step (1) (is contained into steel band with seamless medicine core powder through rolling
Mouthful soldering), tube reducing, obtain welding wire for submerged-arc welding, wherein the welding of LPG ships is welding wire for submerged-arc welding gross mass with the quality of seamless medicine core powder
12%.
(3) by the further drum of welding wire for submerged-arc welding, packaging, storage made from step (2).
Embodiment 2
The seamless medicine core powder of a kind of LPG ships welding, including following component by mass percentage：
A kind of preparation method of welding wire for submerged-arc welding, comprises the following steps：
(1) LPG ships are welded and matches powder with seamless medicine core powder each component and is uniformly mixed, obtained LPG ships and weld seamless medicine
Core powder；
(2) LPG ships welding made from crust mild-carbon steel strip package step (1) (is contained into steel band with seamless medicine core powder through rolling
Mouthful soldering), tube reducing, obtain welding wire for submerged-arc welding, wherein the welding of LPG ships is welding wire for submerged-arc welding gross mass with the quality of seamless medicine core powder
15%.
(3) by the further drum of welding wire for submerged-arc welding, packaging, storage made from step (2).
Embodiment 3
The seamless medicine core powder of a kind of LPG ships welding, including following component by mass percentage：
A kind of preparation method of welding wire for submerged-arc welding, comprises the following steps：
(1) LPG ships are welded and matches powder with seamless medicine core powder each component and is uniformly mixed, obtained LPG ships and weld seamless medicine
Core powder；
(2) LPG ships welding made from crust mild-carbon steel strip package step (1) (is contained into steel band with seamless medicine core powder through rolling
Mouthful soldering), tube reducing, obtain welding wire for submerged-arc welding, wherein the welding of LPG ships is welding wire for submerged-arc welding gross mass with the quality of seamless medicine core powder
9%.
(3) by the further drum of welding wire for submerged-arc welding, packaging, storage made from step (2).
Comparative example
A kind of seamless medicine core powder, including following component by mass percentage：
A kind of preparation method of welding wire for submerged-arc welding, comprises the following steps：
(1) seamless medicine core powder each component with powder and is uniformly mixed, obtains seamless medicine core powder；
(2) by seamless medicine core powder made from crust mild-carbon steel strip package step (1) through rolling (soldering of mouth containing steel band), subtract
Diameter obtains welding wire for submerged-arc welding, wherein the quality of seamless medicine core powder is the 9~15% of welding wire for submerged-arc welding gross mass.
(3) by the further drum of welding wire for submerged-arc welding, packaging, storage made from step (2).
Effect example
The chemical composition of the component of welding wire for submerged-arc welding made from Examples 1 to 3 and comparative example is as shown in table 1, owns
Component is purchased in market.
The chemical composition requirement of 1 main raw material(s) of table
| Raw material title | Granularity (mesh) | Chemical composition (wt%) |
| Iron powder | ≤80 | Fe >=98.0, C≤0.05, S≤0.020, P≤0.020 |
| Manganese metal | ≤80 | Mn >=97.0, Si≤0.40, Fe≤2.0, S≤0.02, P≤0.03 |
| Nickel powder | ≤80 | Ni+Co >=95.0, C≤0.05, S≤0.005, P≤0.005 |
| Remaining component | ≤80 | S≤0.020, P≤0.020 |
By welding wire for submerged-arc welding made from Examples 1 to 3 and comparative example (by taking Φ 5.0mm welding wires as an example) matching F7A (P)
8 solder flux (the solder flux trade mark：SR-SJ603 it) is welded, welding condition is：Source of welding current DC reverse connection, welding current 600
~650A, 32~35V of weldingvoltage, 100~150 DEG C of temperature between road, test result is as shown in table 2~4.
2 embodiment deposited metal composition (wt%) of table
| Embodiment | C | Si | Mn | Ti | B | Ni | S | P |
| Embodiment 1 | 0.017 | 0.124 | 1.79 | 0.020 | 0.0020 | 0.43 | 0.0028 | 0.012 |
| Embodiment 2 | 0.013 | 0.130 | 1.72 | 0.019 | 0.0018 | 0.51 | 0.0026 | 0.011 |
| Embodiment 3 | 0.016 | 0.132 | 1.70 | 0.020 | 0.0019 | 0.56 | 0.0028 | 0.011 |
| Comparative example | 0.018 | 0.276 | 1.83 | 0.021 | 0.0020 | 1.15 | 0.0027 | 0.010 |
3 embodiment welding wire deposited metal mechanical property of table
| Embodiment | Rp0.2/MPa | Rm/MPa | A/% | Akv/J(-60℃) | Akv/J(-75℃) |
| Embodiment 1 | 545 | 675 | 28.5 | 123、136、109 | 108、96、97 |
| Embodiment 2 | 536 | 653 | 26.5 | 131、121、143 | 105、94、91 |
| Embodiment 3 | 523 | 619 | 26.0 | 157、143、120 | 99、83、94 |
| Comparative example | 576 | 703 | 25.4 | 127、93、110 | 38、73、41 |
The deposited metal diffusible hydrogen (ml/100g) of 4 inventive embodiments of table
| Embodiment 1 | 2.67 |
| Embodiment 2 | 3.13 |
| Embodiment 3 | 3.35 |
| Comparative example | 3.20 |
Welding procedure proposed by the invention is excellent, and diffusible hydrogen is low, with the F7A (P) 8 for meeting II SFA-5.17 of ASME
Solder flux matches, and can meet the welding for the FH40 steel difference heat inputs being on active service under cryogenic conditions.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of LPG ships weld seamless medicine core powder, it is characterised in that comprising following component by mass percentage：
Metallic nickel 1.2~4.5%, molybdenum-iron 0.3~1.8%, manganese metal 14~20%, rare earth ferrosilicon 1~3%, ferrotianium 0.5~
2%, ferro-boron 0.2~0.6%, ferrozirconium 0.2~0.6%, surplus is metallic iron.
2. LPG ships according to claim 1 weld seamless medicine core powder, it is characterised in that：
The mass percent of the metallic nickel is 1.2~1.8%.
3. LPG ships according to claim 1 or 2 weld seamless medicine core powder, it is characterised in that：
The granularity of the metallic nickel be≤80 mesh, chemical composition be Ni+Co >=95.0wt%, C≤0.05wt%, S≤
0.005wt%, P≤0.005wt%.
4. LPG ships according to claim 1 or 2 weld seamless medicine core powder, it is characterised in that：
The granularity of the manganese metal be≤80 mesh, chemical composition be Mn >=97.0wt%, Si≤0.40wt%, Fe≤
2.0wt%, S≤0.02wt%, P≤0.03wt%.
5. LPG ships according to claim 1 or 2 weld seamless medicine core powder, it is characterised in that：
The granularity of the metallic iron be≤80 mesh, chemical composition be Fe >=98.0wt%, C≤0.05wt%, S≤
0.020wt%, P≤0.020wt%.
6. a kind of welding wire for submerged-arc welding, it is characterised in that weld seamless medicine core comprising Claims 1 to 5 any one of them LPG ships
Powder.
7. welding wire for submerged-arc welding according to claim 6, it is characterised in that：
It is the 9~15% of welding wire for submerged-arc welding gross mass that the LPG ships, which are welded with the quality of seamless medicine core powder,.
8. the preparation method of the welding wire for submerged-arc welding described in claim 6 or 7, it is characterised in that comprise the following steps：
(1) LPG ships are welded and matches powder with seamless medicine core powder each component and is uniformly mixed, obtained LPG ships and weld seamless medicine core powder；
(2) LPG ships made from crust package step (1) are welded with seamless medicine core powder through rolling, tube reducing, obtains welding wire for submerged-arc welding.
9. the preparation method of the welding wire for submerged-arc welding described in claim 6 or 7, it is characterised in that：
A diameter of 2.4mm, 3.2mm, 4.0mm or 5.0mm of the welding wire for submerged-arc welding.
10. claim 1~6 any one of them LPG ships weld the submerged arc described in seamless medicine core powder and claim 7~8
Application of the welding wire in LPG ship welding fields.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810386851.2A CN108788515B (en) | 2018-04-26 | 2018-04-26 | Seamless flux-cored powder for welding LPG ship, submerged arc welding wire, preparation and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810386851.2A CN108788515B (en) | 2018-04-26 | 2018-04-26 | Seamless flux-cored powder for welding LPG ship, submerged arc welding wire, preparation and application |
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| CN108788515B (en) | 2020-12-18 |
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