CN109530959A - A kind of small dimension self-protection flux-cored wire and its application suitable for downhand welding and horizontal position welding - Google Patents
A kind of small dimension self-protection flux-cored wire and its application suitable for downhand welding and horizontal position welding Download PDFInfo
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- CN109530959A CN109530959A CN201811391447.0A CN201811391447A CN109530959A CN 109530959 A CN109530959 A CN 109530959A CN 201811391447 A CN201811391447 A CN 201811391447A CN 109530959 A CN109530959 A CN 109530959A
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- welding
- cored wire
- small dimension
- protection flux
- dimension self
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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
- B23K35/22—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
-
- 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
-
- 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
- B23K35/3093—Fe as the principal constituent with other elements as next major constituents
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention belongs to technical field of welding materials; more particularly to a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding; including carbon steel crust and it is filled in intracutaneous medicine core outside the carbon steel; component that the medicine core includes and its percentage for accounting for the medicine core gross mass: calcirm-fluoride 40~45%, lithium fluoride 4~7%, marble 10~13%; aluminium powder 12~14%; metal zirconium 1~2%, manganese metal 5~8%, surplus are iron powder.This welding that light section steel structure is used for suitable for the small dimension self-protection flux-cored wire of downhand welding and horizontal position welding provided by the invention.It is provided by the invention to use calcirm-fluoride-lithium fluoride-marble slag system with small dimension self-protection flux-cored wire; slag system is based on high calcirm-fluoride; a large amount of fluorides improve its anti-stomata ability, while the preferable lithium fluoride of stabilising arc effect is added and makes downhand position spatter smaller；It is not necessarily to gas shield when welding, and meets E71T-GS related request in American Standard AWS 5.20.
Description
Technical field
The invention belongs to technical field of welding materials, and in particular to a kind of small dimension self-shield suitable for downhand welding and horizontal position welding
Flux-cored wire and its application.
Background technique
Self-protection flux-cored wire is as a kind of novel welding material, compared with traditional gas-shielded flux-cored wire, when welding
Without gas shield, only all kinds of fluorides in medicine core eliminate hydrogen blistering and utilize the nitrogen in the fixed air of aluminium in medicine core
The generation of nitrogen pore is prevented, welding process is that typical jet stream is excessive, and wind loading rating is strong；Using being simple and efficient.
Small dimension (gage of wire 0.8mm~1.0mm) self-protection flux-cored wire is mainly used in steel casement door, steel sash, thin plate etc.
The welding of light section steel structure；When for downhand welding or horizontal position welding, product mechanical property should meet E71T-GS phase in American Standard AWS 5.20
It closes and requires.Traditional stick electrode and gas shield welding wire are substituted using small dimension self-protection flux-cored wire, it is with the obvious advantage, such as 1 institute of table
Show.
E71T-GS particular technique is required as shown in table 2 and table 3 in AWS 5.20.
Compared with the self-protection flux-cored wire of diameter 2.0mm, small dimension (gage of wire 0.8mm~1.0mm) self-shield
Flux-cored wire, gage of wire it is smaller, it is easy to generate stomata, lead to the strength reduction of weld seam, can also cause to crack.
Summary of the invention
In order to overcome the shortcomings of the prior art described above, the object of the present invention is to provide it is a kind of suitable for downhand welding and cross
The small dimension self-protection flux-cored wire of weldering and its application meet in American Standard AWS 5.20 E71T-GS to deposited metal mechanical property
And the requirement of chemical component, it can be used for the welding of light section steel structure.
To achieve the above object, the technical scheme is that a kind of small dimension self-shield medicine suitable for downhand welding and horizontal position welding
Core welding wire, including carbon steel crust and it is filled in intracutaneous medicine core outside the carbon steel, the component and its account for described that the medicine core includes
The percentage of medicine core gross mass: calcirm-fluoride 40~45%, lithium fluoride 4~7%, marble 10~13%, aluminium powder 12~14%, metal zirconium
1~2%, manganese metal 5~8%, surplus is iron powder.
Further, the medicine core accounts for the 13~13.5% of the small dimension self-protection flux-cored wire gross mass.
Further, the cross-sectional diameter of the small dimension self-protection flux-cored wire is 0.8mm~1.0mm.
Further, in the carbon steel crust each component account for carbon steel crust mass percent it is as follows: Mn≤
0.55%, Si≤0.035%, C≤0.005%, S≤0.002%, P≤0.002%.
Further, the small dimension self-protection flux-cored wire seals in such a way that docking is O-shaped.
As an implementation, the medicine core includes component and its percentage for accounting for the medicine core gross mass: fluorination
Calcium 40%, lithium fluoride 6%, marble 13%, aluminium powder 13%, metal zirconium 1.5%, manganese metal 6%, surplus are iron powder.
As an implementation, the medicine core includes component and its percentage for accounting for the medicine core gross mass: fluorination
Calcium 43%, lithium fluoride 4%, marble 10%, aluminium powder 14%, metal zirconium 2%, manganese metal 5%, surplus are iron powder.
As an implementation, the medicine core includes component and its percentage for accounting for the medicine core gross mass: fluorination
Ca45 %, lithium fluoride 7%, marble 11%, aluminium powder 12%, metal zirconium 1%, manganese metal 8%, surplus are iron powder.
This small dimension self-protection flux-cored wire for being suitable for downhand welding and horizontal position welding provided by the invention is for light section steel structure
Welding.
It is of the invention suitable for the design principle of drug core component the small dimension self-protection flux-cored wire of downhand welding and horizontal position welding such as
Under:
Calcirm-fluoride, that is, fluorite mainly plays slag making, gas making, improves slag fluidity, and content is very few not to have gas shielded work
With content excessively will cause the trickling of welding rod slag, and molding is deteriorated.Therefore content control is 45~45%.
1040 DEG C of lithium fluoride fusing point, mainly play stabilising arc and dehydrogenation, the fluorinated volume of lithium fluoride more a height of 75% was added
Amount lithium fluoride can lead to splash it is excessive, therefore, control lithium fluoride account for the 4~7% of the medicine core total weight.
Marble pyrolytic is CaO, CO2, mainly playing slag making, gas making, content is very few not to have protective effect,
Content, which excessively will cause welding rod and splash, to be increased.Therefore content control is 10~13%.
Aluminium powder is strong deoxidier, and aluminium powder, which is added, can be such that oxygen content in deposited metal, nitrogen content is decreased obviously, anti-gas porosity
Can obviously it rise, appropriate be added can improve welding usability, while improve impact flexibility.Therefore, it is total to account for the medicine core for control aluminium
The 12~14% of weight.
Metal zirconium is strong deoxidier, and deoxidizing capacity is also stronger than aluminium powder, while in conjunction with the N in weld metal, being reduced
It is dissolved the illeffects of nitrogen, the ZrN of generation promotes weld seam to become fine grain structure, but Zr too high levels meeting as crystallization nuclei
Increase the hardness of weld seam, toughness decline.Therefore, control metal zirconium accounts for the 1~2% of the medicine core total weight.
Manganese metal is deoxidier, reduces the oxygen content of weld metal, increases weld metal intensity, improves toughness, adjusts iron
Water flowing.Therefore, it is 5~8% that manganese metal, which accounts for the percentage of the medicine core powder total weight,.
Iron powder can improve welding arc state, adjust molten iron fusing point and viscosity, and surplus is added.
Compared with prior art, the invention has the following advantages:
(1) this small dimension self-protection flux-cored wire provided by the invention uses calcirm-fluoride-lithium fluoride-marble slag system, slag system
Based on high calcirm-fluoride, which is that a large amount of fluorides (such as calcirm-fluoride) improve its anti-stomata ability, while stabilising arc is added
The preferable lithium fluoride of effect makes downhand position spatter smaller；Gas shield is not necessarily to when welding, by all kinds of in medicine core
Fluoride eliminates hydrogen blistering, and using the nitrogen in the aluminium and the fixed air of zirconium in medicine core, prevents the generation of nitrogen pore, welded
Journey is that typical jet stream is excessive, suitable for downhand welding or the welding of horizontal position, welds plate thickness and is not more than 19mm；
(2) this small dimension self-protection flux-cored wire provided by the invention is reduced in weld seam by the way of aluminum-zirconium combined deoxidation
Oxygen content, while appropriate minerals are added, improve appearance of weld and arc stability, the N in metal zirconium and weld metal is tied
It closes, promote weld seam to become fine grain structure makes the product mechanics meet E71T- in American Standard AWS 5.20 so as to improve plasticity and toughness
GS related request；
(3) raw material used in this small dimension self-protection flux-cored wire provided by the invention are high-grade raw material, and S, P contain
Amount is few, is conducive to the performance for improving flux-cored wire；
(4) this small dimension self-protection flux-cored wire provided by the invention is by being added the stronger deoxidations such as a large amount of aluminium, zirconium, manganese
Agent is decreased obviously oxygen content in deposited metal, nitrogen content, and porosity resistance ability obviously rises, it is ensured that porosity resistance ability.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding, including carbon steel crust and fills out
It fills in medicine core intracutaneous outside the carbon steel, the component and its percentage for accounting for the medicine core gross mass that the medicine core includes: fluorination
Calcium 40~45%, lithium fluoride 4~7%, marble 10~13%, aluminium powder 12~14%, metal zirconium 1~2%, manganese metal 5~8%, surplus
For iron powder.This small dimension self-protection flux-cored wire provided by the invention uses calcirm-fluoride-lithium fluoride-marble slag system, largely
Its anti-stomata ability can be improved in fluoride, at the same be added the preferable lithium fluoride of stabilising arc effect make downhand position spatter compared with
It is small.It is not necessarily to gas shield when welding, eliminates hydrogen blistering by all kinds of fluorides in medicine core, using in aluminium, zirconium, the fixed air of manganese
Nitrogen, prevent the generation of nitrogen pore, the product made to meet E71T-GS related request in American Standard AWS 5.20.
The chemical component of carbon steel crust in the present invention is shown in Table 4.
According to the thickness and width situation of carbon steel crust, the filling rate of suitable flux-cored wire, medicine core of the invention are determined
The filling rate (medicine core accounts for welding wire total weight percent) of welding wire is 13~13.5%.The medicine core weldering that the embodiment of the present invention 1~3 provides
It each component of medicine core and its accounts for the mass percent of the flux-cored wire in silk and is shown in Table 5.
The present invention also provides the preparation methods of above-mentioned small dimension self-protection flux-cored wire: producing the medicine core using steel band method
Welding wire, the intradermal filling medicine core outside the carbon steel, and sealed in such a way that docking is O-shaped, the formula of medicine core is shown in Table 5, fills out
Filling rate is 13~13.5%, the flux-cored wire for being 0.9mm up to cross-sectional diameter after drawing forms tube reducing.It is provided by the invention
This small dimension self-protection flux-cored wire is suitable for the welding of light section steel structure.
It is tested using the flux-cored wire that the embodiment of the present invention 1 ~ 3 provides, the mechanical property of deposited metal is shown in Table 6,
Deposited metal composition is shown in Table 7.
As can be seen from Table 6, the deposited metal for the small dimension self-protection flux-cored wire that the embodiment of the present invention 1 ~ 3 provides resists
Tensile strength reaches 480MPa or more, meets requirement of the E71T-GS to welding wire deposited metal mechanical property in American Standard AWS 5.20；From
Table 7 is as can be seen that each component contains in the deposited metal for the small dimension self-protection flux-cored wire that the embodiment of the present invention 1 ~ 3 provides
Amount: C≤0.015%, Si≤0.30%, Mn≤1.50%, S≤0.03%, P≤0.03%, Al≤1.5% meet American Standard AWS 5.20
Requirement of the middle E71T-GS to chemical component and content in welding wire deposited metal.
In conclusion this small dimension self-protection flux-cored wire provided by the invention meets E71T- in American Standard AWS 5.20
GS related request, can be used for the welding of the light section steel structures such as steel casement door, steel sash, thin plate, and not have crackle in weld seam, pore-free, at
Type is beautiful.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding, including carbon steel crust and it is filled in the carbon steel
Outer intracutaneous medicine core, it is characterised in that: the component and its percentage for accounting for the medicine core gross mass that the medicine core includes: calcirm-fluoride
40~45%, lithium fluoride 4~7%, marble 10~13%, aluminium powder 12~14%, metal zirconium 1~2%, manganese metal 5~8%, surplus is
Iron powder.
2. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
The medicine core accounts for the 13~13.5% of the small dimension self-protection flux-cored wire gross mass.
3. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
The cross-sectional diameter of the small dimension self-protection flux-cored wire is 0.8mm~1.0mm.
4. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
In the carbon steel crust each component account for carbon steel crust mass percent it is as follows: Mn≤0.55%, Si≤0.035%,
C≤0.005%, S≤0.002%, P≤0.002%.
5. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
The small dimension self-protection flux-cored wire seals in such a way that docking is O-shaped.
6. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
Component that the medicine core includes and its percentage for accounting for the medicine core gross mass: calcirm-fluoride 40%, lithium fluoride 6%, marble 13%,
Aluminium powder 13%, metal zirconium 1.5%, manganese metal 6%, surplus are iron powder.
7. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
Component that the medicine core includes and its percentage for accounting for the medicine core gross mass: calcirm-fluoride 43%, lithium fluoride 4%, marble 10%,
Aluminium powder 14%, metal zirconium 2%, manganese metal 5%, surplus are iron powder.
8. a kind of small dimension self-protection flux-cored wire suitable for downhand welding and horizontal position welding as described in claim 1, it is characterised in that:
Component that the medicine core includes and its percentage for accounting for the medicine core gross mass: calcirm-fluoride 45%, lithium fluoride 7%, marble 11%,
Aluminium powder 12%, metal zirconium 1%, manganese metal 8%, surplus are iron powder.
9. a kind of answering such as the described in any item small dimension self-protection flux-cored wires suitable for downhand welding and horizontal position welding of claim 1-8
With, it is characterised in that: the small dimension self-protection flux-cored wire is used for the welding of light section steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391447.0A CN109530959B (en) | 2018-11-21 | 2018-11-21 | Small-specification self-shielded flux-cored wire suitable for flat welding and transverse welding and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391447.0A CN109530959B (en) | 2018-11-21 | 2018-11-21 | Small-specification self-shielded flux-cored wire suitable for flat welding and transverse welding and application thereof |
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| Publication Number | Publication Date |
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| CN109530959A true CN109530959A (en) | 2019-03-29 |
| CN109530959B CN109530959B (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404795A (en) * | 2020-10-08 | 2021-02-26 | 武汉科技大学 | Seamless self-protection flux-cored wire for welding low-nitrogen non-magnetic naval vessel steel |
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| CN112404795A (en) * | 2020-10-08 | 2021-02-26 | 武汉科技大学 | Seamless self-protection flux-cored wire for welding low-nitrogen non-magnetic naval vessel steel |
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| CN109530959B (en) | 2021-03-26 |
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