CN113458646A - Chromium-free boron carbide type self-protection flux-cored wire - Google Patents
Chromium-free boron carbide type self-protection flux-cored wire Download PDFInfo
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- CN113458646A CN113458646A CN202110779800.8A CN202110779800A CN113458646A CN 113458646 A CN113458646 A CN 113458646A CN 202110779800 A CN202110779800 A CN 202110779800A CN 113458646 A CN113458646 A CN 113458646A
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- Prior art keywords
- chromium
- boron carbide
- flux
- wire
- content
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Links
- 229910052580 B4C Inorganic materials 0.000 title claims abstract description 27
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052796 boron Inorganic materials 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 239000011324 bead Substances 0.000 abstract description 40
- 239000011572 manganese Substances 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 229910003470 tongbaite Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 5
- 238000005253 cladding Methods 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
Classifications
-
- 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
- B23K35/36—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
- B23K35/3601—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 with inorganic compounds as principal constituents
- B23K35/3606—Borates or B-oxides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a chromium-free boron carbide type wear-resistant hard-surface self-protection flux-cored wire, which comprises the following flux-cored components in percentage by weight: c: 2.0-4.5%, B: 10.0-26.0%, Ni: 4.0-12.5%, Mn: 4.0-12.5%, Si: 2.0-8.0%, and the balance: fe. The deposited metal components and contents of the welding wire are as follows: c: 0.4-0.8%, B: 2.0-5.0%, Ni: 1.0-3.0%, Mn: 1.0-3.0%, Si: 0.5-2.0% and the balance Fe. The welding wire does not contain Cr, a single welding bead has ultrahigh hardness, and the welding bead is not easy to fall off.
Description
Technical Field
The invention belongs to the field of welding materials, and particularly relates to a chromium-free boron carbide type wear-resistant hard-surface self-protection flux-cored wire.
Background
Generally, for facing welding of workpieces whose surfaces are required to have high wear resistance, a high-carbon high-chromium hard-faced welding wire of chromium carbide type is used, and in particular, single-layer facing welding is used. In order to achieve the high carbon and high chromium carbide characteristics of a single layer cladding, the welding wire is designed to have a higher carbon content and a higher chromium content than the welding wire used for welding a multilayer cladding, but the design has the disadvantage that the weld bead is easy to peel off.
Disclosure of Invention
In order to overcome the defects, the invention provides a chromium-free boron carbide type self-protection flux-cored wire which is a boron carbide type hard-surface welding wire with low carbon content and no chromium, is suitable for single-layer clad surface welding, and has good wear resistance and difficult peeling of a welding bead.
The technical scheme of the invention is as follows: a chromium-free boron carbide type self-protection flux-cored wire is disclosed, which is composed of a carbon steel sheath and a flux core, wherein the flux core accounts for 23-27% of the wire; the flux core comprises the following components in proportion: c: 2.0-4.5%, B: 10.0-26.0%, Ni: 4.0-12.5%, Mn: 4.0-12.5%, Si: 2.0-8.0%, and the balance: fe.
Wherein, the deposited metal components and the content of the chromium-free boron carbide type self-protection flux-cored wire are as follows: c: 0.4-0.8%, B: 2.0-5.0%, Ni: 1.0-3.0%, Mn: 1.0-3.0%, Si: 0.5-2.0% and the balance Fe.
Preferably, the flux core comprises the following components in proportion: c: 2.58-3.91%, B: 14.2-24.5%, Ni: 6.26-10.20%, Mn: 5.94-9.18%, Si: 3.97-7.87%, and the balance: fe.
Preferably, the flux core accounts for 23.6-26.2% of the weight of the welding wire.
Preferably, the deposited metal components and contents of the welding wire are as follows: c: 0.48-0.71%, B: 2.71-4.72%, Ni: 1.52-2.42%, Mn: 1.48-2.21%, Si: 0.98-1.98% and the balance Fe.
Preferably, the deposited metal components and contents of the welding wire are as follows: c: 0.67%, B: 4.67%, Ni: 2.32%, Mn: 1.48%, Si: 0.98 percent and the balance of Fe.
The appropriate C content in the deposited metal enables the weld bead to contain an appropriate amount of boron carbide, and thus has good wear resistance. When the content of C is less than 0.4%, the amount of boron carbide contained in the weld bead is insufficient, the hardness of the weld bead is low, and the wear resistance is poor; when the C content is more than 0.8%, the weld bead shrinkage cracks are obvious, and the weld bead peeling sensitivity is high. The source of C may be graphite, metallic carbides or metallic high carbon iron.
The appropriate content of B in the deposited metal enables the weld bead to contain an appropriate amount of boron carbide, and thus the weld bead has good wear resistance. When the content of B is less than 2.0%, the amount of boron carbide contained in the weld bead is insufficient, the hardness of the weld bead is low, and the wear resistance is poor; when the B content is more than 5.0%, the weld bead shrinkage cracks are obvious, and the weld bead peeling sensitivity is high. The source of B may be ferroboron or boron carbide.
The appropriate Ni content in the deposited metal can provide good toughness to the weld bead and improve the anti-stripping performance of the weld bead. When the Ni content is less than 1.0%, the effect is not obvious; when the Ni content is more than 3.0%, the hardness of the bead base is lowered, and the wear resistance is poor. The source of Ni may be metallic nickel or nickel iron.
The appropriate Mn content of the deposited metal can make the weld bead have good surface and appropriate hardness. When the Mn content is less than 1.0%, more porous pits are generated on the surface of the welding bead; when the Mn content is more than 3.0%, the hardness of the bead base is lowered and the wear resistance is poor. The source of Mn may be electrolytic manganese or ferromanganese.
The weld metal has an appropriate Si content, and the shape of the weld bead is good and the weld bead has appropriate hardness. When the Si content is less than 0.5%, a pore-shaped pit is easily generated due to narrow welding bead; when the Si content is more than 2.0%, the Si/C ratio is too high, the hardness of the bead base is lowered, and the wear resistance is poor. The source of Si may be metallic silicon, ferrosilicon or silicon carbide.
The present invention is an alloy and a compound which do not contain Cr, except that other raw materials may contain a very small amount of Cr.
The deposited metal of the welding wire of the invention contains C: 0.4-0.8%, B: 2.0-5.0%, so that the weld bead contains ultra-high hardness boron carbide particles, thereby having very good wear resistance, and particularly, the surface of the single-layer weld bead has ultra-high hardness and good wear resistance.
The hardness of boron carbide is second to that of diamond and cubic boron nitride, and the Mohs hardness is 9.3, so that the boron carbide is the most ideal high-temperature wear-resistant material. Due to the ultra-high hardness characteristic of boron carbide, the boron carbide hard-surface welding wire can have ultra-high hardness because the content of boron carbide in the boron carbide hard-surface welding wire is far lower than that of chromium carbide in the chromium carbide hard-surface welding wire. Therefore, the boron carbide type hard-face welding wire has much less bead shrinkage cracks than the chromium carbide type, and the bead is more resistant to peeling.
The invention relates to a self-protecting welding wire, which does not need external protective gas during welding, has low carbon content and no chromium, is suitable for cladding welding of workpieces with high wear resistance on the surface, particularly has excellent wear resistance by single-layer cladding welding, has difficult peeling of a welding bead, and can improve the defect that a common high-carbon high-chromium carbide type welding bead is easy to peel.
Detailed Description
For the understanding of the present invention, the technical solutions of the present invention are further described below with reference to specific examples, but the present invention is not limited to these examples.
Examples 1 to 5 are chromium-free boron carbide type abrasion-resistant hard-face self-shielded flux-cored wires of the present invention, which are composed of a carbon steel sheath coated with a flux-cored wire, wherein the flux-cored wire accounts for 23 to 27% of the total amount of the wire.
The composition and content of the carbon steel sheath, i.e., the steel strip, used in the examples of the present invention are shown in Table 1.
TABLE 1 Steel strip composition (wt%)
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| 0.024 | 0.005 | 0.213 | 0.0010 | 0.0019 | 0.012 | 0.012 | 0.001 | 0.005 |
In the examples of the present invention, the thickness of the steel strip was 0.8mm, the width was 19mm, and the thickness of the welded plate in the overlay welding test was 16 mm.
The wire diameter of the welding wire is 2.0mm, the welding current is 350A, the voltage is 30V, and the welding speed is 300 mm/min.
The component ratios of the flux cores of examples 1 to 5 and comparative examples 6 to 15 of the present invention are shown in Table 2.
TABLE 2 ratio of the ingredients of the drug core (wt%)
The deposited metal components and contents of examples 1 to 5 of the present invention and comparative examples 6 to 15 are shown in Table 3.
TABLE 3 welding wire deposited metal composition (wt%)
The results of the performance tests of examples 1-5 and comparative examples are shown in Table 4:
table 4 results of performance testing
Remarking: good X not good
The cases 1 to 5 listed in tables 2 and 3 are examples of the present invention, and the bead surface, the shrinkage crack thickness condition, the hardness of the deposited metal, and the abrasion amount all meet the requirements.
Cases 6 to 15 are related comparative examples. Case 6 the deposited metal C content was too low, the hardness was low and the abrasion was slightly high. In case 7, the content of deposited metal C was too high, and the bead shrank and cracked, and the bead peeled off during the processing. Case 8 the deposited metal B content was too low, hardness was low, and abrasion was high. In case 9, the content of deposited metal B was too high, and the bead was shrunk and cracked to be coarse, and the bead was peeled off during the processing. Case 10, too low Ni content in the deposited metal, coarse shrinkage cracks in the bead. Case 11 the deposited metal has too high Ni content, low hardness and slightly high abrasion loss. In case 12, the Mn content in the deposited metal was too low, and the porosity of the bead surface was large. Case 13 the deposited metal has too high Mn content, low hardness and slightly high abrasion loss. Case 14 had too low a content of deposited metal Si, a narrow bead width, and slightly more hole-like dents. Case 15 the deposited metal has too high Si content, low hardness and slightly high abrasion loss.
The welding wire of the invention does not contain Cr, has ultrahigh hardness and abrasion-resistant hard surface self-protection welding wire with single-layer welding bead, and can be used for agriculture, quarries, mining and civil engineering equipment, such as: hard-faced cladding welding of conveying screws, hoppers, shredders and the like.
The above-described embodiments are only preferred embodiments of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (5)
1. A chromium-free boron carbide type self-protection flux-cored wire is composed of a carbon steel sheath and a flux core, wherein the flux core accounts for 23-27% of the weight of the wire, and the flux core is characterized by comprising the following components in percentage by weight: c: 2.0-4.5%, B: 10.0-26.0%, Ni: 4.0-12.5%, Mn: 4.0-12.5%, Si: 2.0-8.0%, and the balance: fe.
2. The chromium-free boron carbide-based self-shielded flux-cored welding wire of claim 1, wherein the deposited metal composition and content of the wire are as follows: c: 0.4-0.8%, B: 2.0-5.0%, Ni: 1.0-3.0%, Mn: 1.0-3.0%, Si: 0.5-2.0% and the balance Fe.
3. The chromium-free, boron carbide-based, self-shielded, flux-cored welding wire of claim 1, wherein the composition of the core is as follows: c: 2.58-3.91%, B: 14.2-24.5%, Ni: 6.26-10.20%, Mn: 5.94-9.18%, Si: 3.97-7.87%, and the balance: fe.
4. The chromium-free boron carbide-based self-shielded flux-cored welding wire of claim 3, wherein the flux core is 23.6 to 26.2% by weight of the wire.
5. The chromium-free boron carbide-based self-shielded flux-cored welding wire of claim 3, wherein the deposited metal composition and content of the wire are as follows: c: 0.48-0.71%, B: 2.71-4.72%, Ni: 1.52-2.42%, Mn: 1.48-2.21%, Si: 0.98-1.98% and the balance Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779800.8A CN113458646A (en) | 2021-07-09 | 2021-07-09 | Chromium-free boron carbide type self-protection flux-cored wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779800.8A CN113458646A (en) | 2021-07-09 | 2021-07-09 | Chromium-free boron carbide type self-protection flux-cored wire |
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| Publication Number | Publication Date |
|---|---|
| CN113458646A true CN113458646A (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110779800.8A Pending CN113458646A (en) | 2021-07-09 | 2021-07-09 | Chromium-free boron carbide type self-protection flux-cored wire |
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| Country | Link |
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| CN (1) | CN113458646A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430122A (en) * | 1982-09-29 | 1984-02-07 | Eutectic Corporation | Flux-cored arc welding tubular electrode |
| CN101058130A (en) * | 2006-04-18 | 2007-10-24 | 上海博腾焊接材料有限公司 | Flux-cored wire used for building-up welding |
| JP2007296535A (en) * | 2006-04-27 | 2007-11-15 | Kobe Steel Ltd | Gas-shielded arc welding flux-cored wire and welding method |
| WO2011021751A1 (en) * | 2009-08-18 | 2011-02-24 | 한양대학교 산학협력단 | Chromium-free iron-based hardfacing alloy with excellent abrasion resistance |
| CN102581515A (en) * | 2012-03-16 | 2012-07-18 | 北京工业大学 | Iron-based overlaying flux-cored welding wire for abrasion-resistant belts of drill pipe joints |
| US20130294962A1 (en) * | 2010-10-21 | 2013-11-07 | Stoody Company | Chromium-free hardfacing welding consumable |
| CN104271310A (en) * | 2012-05-08 | 2015-01-07 | 新日铁住金株式会社 | Flux-containing wire for welding ultrahigh-tensile steel |
| CN113070607A (en) * | 2021-03-12 | 2021-07-06 | 哈尔滨威尔焊接有限责任公司 | Chromium-free high-wear-resistance impact-resistant surfacing flux-cored wire |
-
2021
- 2021-07-09 CN CN202110779800.8A patent/CN113458646A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430122A (en) * | 1982-09-29 | 1984-02-07 | Eutectic Corporation | Flux-cored arc welding tubular electrode |
| CN101058130A (en) * | 2006-04-18 | 2007-10-24 | 上海博腾焊接材料有限公司 | Flux-cored wire used for building-up welding |
| JP2007296535A (en) * | 2006-04-27 | 2007-11-15 | Kobe Steel Ltd | Gas-shielded arc welding flux-cored wire and welding method |
| WO2011021751A1 (en) * | 2009-08-18 | 2011-02-24 | 한양대학교 산학협력단 | Chromium-free iron-based hardfacing alloy with excellent abrasion resistance |
| US20130294962A1 (en) * | 2010-10-21 | 2013-11-07 | Stoody Company | Chromium-free hardfacing welding consumable |
| CN102581515A (en) * | 2012-03-16 | 2012-07-18 | 北京工业大学 | Iron-based overlaying flux-cored welding wire for abrasion-resistant belts of drill pipe joints |
| CN104271310A (en) * | 2012-05-08 | 2015-01-07 | 新日铁住金株式会社 | Flux-containing wire for welding ultrahigh-tensile steel |
| CN113070607A (en) * | 2021-03-12 | 2021-07-06 | 哈尔滨威尔焊接有限责任公司 | Chromium-free high-wear-resistance impact-resistant surfacing flux-cored wire |
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Application publication date: 20211001 |
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