CN106624465A - Wear-resistant surfacing electrode and preparation method thereof - Google Patents
Wear-resistant surfacing electrode and preparation method thereof Download PDFInfo
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- CN106624465A CN106624465A CN201611120694.8A CN201611120694A CN106624465A CN 106624465 A CN106624465 A CN 106624465A CN 201611120694 A CN201611120694 A CN 201611120694A CN 106624465 A CN106624465 A CN 106624465A
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- coating
- preparation
- hardfacing electrode
- hardfacing
- electrode according
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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
- B23K35/36—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
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
-
- 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)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a wear-resistant surfacing electrode and belongs to the field of welding materials. The wear-resistant surfacing electrode comprises a welding core and a coating, and is characterized in that the coating is prepared from, by weight, 30-50% of low-carbon ferrochromium, 10-25% of rutile, 10-25% of fluorite, 3-10% of zirconite, 10-20% of deoxidizing agent, 5-15% of ferrotitanium and 3-8% of ferroniobium. The invention further discloses a preparation method of the wear-resistant surfacing electrode. The wear-resistant surfacing electrode and the preparation method have the advantages that nitrogen in air is used for alloying, and a method of microalloying strong nitrogen-fixing elements of Ti and Nb is adopted, so that the nitrogen content of surfacing layer metal reaches 0.12-0.6%; the wear-resistant surfacing electrode is excellent in technological performance and has the surfacing layer 41-57 HRC in average hardness, thereby being excellent in usability.
Description
Technical field
The invention belongs to field of welding material, and in particular to a kind of hardfacing electrode and preparation method thereof, it is adaptable to steel
The roll in ironworks, the coal-grinding roller in thermal power plant, engineering excavation machinery, mining machinery surface is modified, composite manufacturing and make again
The aspect such as make.
Background technology
Nitrogen is interstitial solute atom with carbon, can form the Second Phase Particles of Dispersed precipitate, and nitrogen to welding performance
Affect less, be not in crackle in welding process.The strengthening principle of nitrogen is made full use of, introduces suitable in hardfacing materials
The nitrogen of amount, it is modified by nitrogen alloying, form favourable nitride using the microalloy element as Ti or Nb, you can make up
Carbon content reduces the reduction for causing layer hardness, higher-strength, wear-resistant etc. can be obtained in hardfacing materials again excellent
Surface property, can become the new way for improving hardfacing materials combination property.
At present in welding material plus nitrogen alloy method mainly by plus nitrogen-containing alloy powder method realizing, such as
Plus the ferroalloy powder such as nitrogenous chromium, manganese, vanadium, the nitrogen-containing alloy powder price that these are added is expensive, and transfer coefficient is low, makes
Into the great wasting of resources.
The content of the invention
For the problems referred to above, the invention provides a kind of hardfacing electrode, using air in natural nitrogen carry out
Alloying, and using strong nitrogen Ti and Nb alloyings, while improving toughness, the crack resistance of hardfacing alloy, hardness is improved,
Increase anti-wear performance.
To solve problem above, the present invention is achieved through the following technical solutions：
A kind of hardfacing electrode, including core wire and coating, its coating is made up of the raw material of following percentage by weight：Low-carbon (LC)
Ferrochrome 30～50%, rutile 10～25%, fluorite 10～25%, zircon 3～10%, deoxidier 10～20%, ferrotianium 5～
15% and ferro-niobium 3～8%.
Preferably, the coating is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 33～45%, rutile 11～
15%th, fluorite 12～15%, zircon 6%, deoxidier 12～13%, ferrotianium 7～12% and ferro-niobium 6～7%.
Preferably, the carbon content of the low-carbon ferrochromium is 0.15～0.50wt%.
Preferably, the deoxidier is aluminium powder, ferrosilicon and ferromanganese by weight 1:1:1 mixing.
Preferably, the trade mark of the core wire is H08A.
Wherein, each raw material effect is as follows：
Low-carbon ferrochromium：To surfacing layer metal transition alloy elements.Rutile：Slag making, stable welding arc, improves Welder
Skill performance.Fluorite：Slag making and dehydrogenation, realize hydrogen controlled electrode, fully ensure that mechanical performance.Zircon：Improve welding usability
Energy.Deoxidier：Aluminium powder, ferrosilicon and ferromanganese, using Al, Si, Mn combined deoxidation, exclude the oxygen in weld seam so that decomposed by electric arc
Nitrogen ion smoothly enter inside molten pool metal, and then increase surfacing layer metal intensity and hardness.Ferrotianium, ferro-niobium：Gu
Nitrogen alloy, forms hard, wear-resistant phase in hardfacing alloy.
Present invention also offers the preparation method of above-mentioned hardfacing electrode, comprises the following steps：
(1) by each raw material mixing of the coating, stir, add the binding agent of raw material gross weight 5～10%, continue to stir
Mix, it is uniform after obtain coating paint；
(2) core wire is carried out into conventional cleaning, then gained coating paint is attached to outside the core wire, twisted, so
Afterwards baked drying again, obtains hardfacing electrode of the present invention.
Preferably, the binding agent is mainly waterglass, and modulus is 2.4～2.7, and proportion is 1.39～1.59.
Preferably, the binding agent is made up of 90～98wt% of waterglass and 2～10wt% of potassium permanganate, adds permanganic acid
After potassium, gained coating paint has splendid extrusion, is effectively reduced cracking phenomena of the coating when bakeing, and in welding
Reduce welding rod pool depth, be easy to exhaust, with very strong anti-pore ability；In addition, the potassium permanganate for adding, can make waterglass
What the effect between the ferroalloy such as ferrosilicon, ferromanganese became stablizes, deoxidation effect more preferably, and with high stabilising arc performance.
Preferably, the attachment thickness of the coating paint can according to electrode size and actual operation requirements and operating mode, 1～
Adjust between 4mm.
The present invention has following positive beneficial effect：
By substantial amounts of test, inventor is researched and developed the present invention and the hardfacing weldering of nitrogen alloying is carried out using air
Bar.Scientific design coating component of the present invention, carries out emphatically flux shielding, considers fusing point, viscosity, tension force, basicity and the oxygen of slag as a whole
The property changed, makes nitrogen to fully absorb at the formation initial stage of molten drop, and while carry out deoxidation, realizes effective deoxidation in advance and solid
Nitrogen, could utilize electric arc heat effect, make in air about 80% nitrogen decompose and by molten bath Metal absorption, and then realize weldering
The nitrogen alloying (nitrogen content in surfacing layer metal is 0.6～0.12wt%) of seam metal, effectively reduces the cost of welding material.
Surfacing welding of the present invention using air in natural nitrogen carry out alloying, and using strong nitrogen Ti and Nb alloys
The method of change, while improving toughness, the crack resistance of hardfacing alloy, improves hardness, increases anti-wear performance.Result of practical application table
Bright, the welding rod bead-welding technology is functional, containing rational nitrogen content, overlay cladding average hardness HRC41～57.
Description of the drawings
Fig. 1 is the preparation method flow chart of surfacing welding of the present invention.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in more detail.It should be appreciated that concrete reality described herein
Example is applied only to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of hardfacing electrode, including core wire and coating, its electrode size 3.2mm, trade mark H08A, its coating thickness
1.5mm, is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 33%, rutile 15%, fluorite 15%, zircon 6%,
(aluminium powder, ferrosilicon and ferromanganese are by weight 1 for deoxidier:1:1 mixing) 13%, ferrotianium 12% and ferro-niobium 6%.
Its preparation method is as shown in figure 1, specifically include following steps：
(1) by each raw material mixing of the coating, stir, add binding agent (the waterglass 95wt% of raw material gross weight 8%
With potassium permanganate 5wt%) continue to stir, it is uniform after obtain coating paint；
(2) core wire is carried out into conventional cleaning, then gained coating paint is attached to outside the core wire, twisted, so
Baked drying again afterwards, obtains hardfacing electrode of the present invention, welding rod overlay cladding average hardness HRC57.
Embodiment 2
A kind of hardfacing electrode, including core wire and coating, its electrode size 4.0mm, trade mark H08A, its coating thickness
2.0mm, is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 45%, rutile 11%, fluorite 12%, zircon 6%,
(aluminium powder, ferrosilicon and ferromanganese are by weight 1 for deoxidier:1:1 mixing) 12%, ferrotianium 7% and ferro-niobium 7%.Its preparation method is same
Embodiment 1, welding rod overlay cladding average hardness HRC56.
Embodiment 3
A kind of hardfacing electrode, including core wire and coating, its electrode size 3.0mm, trade mark H08A, its coating thickness
1.0mm, is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 30%, rutile 22%, fluorite 10%, zircon 10%,
(aluminium powder, ferrosilicon and ferromanganese are by weight 1 for deoxidier:1:1 mixing) 10%, ferrotianium 15% and ferro-niobium 3%.Its preparation method is same
Embodiment 1, welding rod overlay cladding average hardness HRC49.
Embodiment 4
A kind of hardfacing electrode, including core wire and coating, its electrode size 5.0mm, trade mark H08A, its coating thickness
2.5mm, is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 50%, rutile 10%, fluorite 10%, zircon 3%,
(aluminium powder, ferrosilicon and ferromanganese are by weight 1 for deoxidier:1:1 mixing) 15%, ferrotianium 5% and ferro-niobium 7%.Its preparation method is same
Embodiment 1, welding rod overlay cladding average hardness HRC47.
Embodiment 5
A kind of hardfacing electrode, including core wire and coating, its electrode size 4.0mm, trade mark H08A, its coating thickness
2.0mm, is made up of the raw material of following percentage by weight：Low-carbon ferrochromium 30%, rutile 25%, fluorite 24%, zircon 3%,
(aluminium powder, ferrosilicon and ferromanganese are by weight 1 for deoxidier:1:1 mixing) 10%, ferrotianium 5% and ferro-niobium 3%.Its preparation method is same
Embodiment 1, welding rod overlay cladding average hardness HRC45.
By hardfacing electrode in above example, compared with commercially available same type surfacing welding, cost can save 10% with
On, anti-wear performance improves more than 30%.
Above-mentioned specific embodiment is the invention is not limited in, those skilled in the art can also accordingly make various changes,
But it is any all to cover within the scope of the claims with equivalent of the invention or similar change.
Claims (9)
1. a kind of hardfacing electrode, including core wire and coating, it is characterised in that：The coating by following percentage by weight original
Material is made：Low-carbon ferrochromium 30～50%, rutile 10～25%, fluorite 10～25%, zircon 3～10%, deoxidier 10～20%,
Ferrotianium 5～15% and ferro-niobium 3～8%.
2. hardfacing electrode according to claim 1, it is characterised in that：The coating by following percentage by weight original
Material is made：Low-carbon ferrochromium 33～45%, rutile 11～15%, fluorite 12～15%, zircon 6%, deoxidier 12～13%, ferrotianium 7
～12% and ferro-niobium 6～7%.
3. hardfacing electrode according to claim 1 and 2, it is characterised in that：The carbon content of the low-carbon ferrochromium is
0.15～0.50wt%.
4. hardfacing electrode according to claim 1 and 2, it is characterised in that：The deoxidier is aluminium powder, ferrosilicon and manganese
Iron is by weight 1:1:1 mixing.
5. hardfacing electrode according to claim 1 and 2, it is characterised in that：The trade mark of the core wire is H08A.
6. a kind of preparation method of hardfacing electrode, it is characterised in that comprise the following steps：
（1）Coating raw material, and mixing and stirring are equipped with by claim 1 or 2, the binding agent of raw material gross weight 5～10% is added,
Continue to stir, it is uniform after obtain coating paint；
（2）Core wire is carried out into conventional cleaning, then gained coating paint is attached to outside the core wire, twisted, Ran Houzai
Baked drying, obtains hardfacing electrode of the present invention.
7. the preparation method of hardfacing electrode according to claim 6, it is characterised in that：The binding agent is mainly water glass
Glass, modulus is 2.4～2.7, and proportion is 1.39～1.59.
8. the preparation method of hardfacing electrode according to claim 7, it is characterised in that：The binding agent is by waterglass 90
～98wt% and 2～10wt% of potassium permanganate is constituted.
9. the preparation method of hardfacing electrode according to claim 6, it is characterised in that：The attachment of the coating paint is thick
Spend for 1～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611120694.8A CN106624465B (en) | 2016-12-08 | 2016-12-08 | A kind of hardfacing electrode and preparation method thereof |
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| CN201611120694.8A CN106624465B (en) | 2016-12-08 | 2016-12-08 | A kind of hardfacing electrode and preparation method thereof |
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| CN106624465B (en) | 2019-07-26 |
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