CN104476012A - Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof - Google Patents
Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof Download PDFInfo
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- CN104476012A CN104476012A CN201410603077.8A CN201410603077A CN104476012A CN 104476012 A CN104476012 A CN 104476012A CN 201410603077 A CN201410603077 A CN 201410603077A CN 104476012 A CN104476012 A CN 104476012A
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- niobium
- resisting
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- coating
- wear
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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
- B23K35/22—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
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- 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
- B23K35/404—Coated rods; Coated electrodes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a niobium-strengthened wear-resisting surfacing electrode. The niobium-strengthened wear-resisting surfacing electrode comprises an electrode core and an electrode coating coated on the surface of the electrode core. By weight percentage, the electrode coating is composed of 30-50% of marble, 15-25% of fluorite, 4-10% of titanium dioxide, 3-8% of zircon sand, 3-8% of potash feldspar, 4-8% of rare earth silicon and 3-10% of ferroniobium. The invention also discloses a preparation method of the niobium-strengthened wear-resisting surfacing electrode. The niobium-strengthened wear-resisting surfacing electrode is strengthened through niobium and prepared through market materials, can obviously improve the hardness and the wear resistance of surfacing layers and ensure high welding technological properties of welding electrodes, and meanwhile, is low in cost. The actual application results show that, during the surfacing process, the niobium-strengthened wear-resisting surfacing electrode is simple in arc striking and re-arcing, stable in arcing, less prone to arc interruption, high in blowing force, low in welding smoke, small in spatter granularity, high in fusing efficiency and easy to deslag; surfacing joints are fine in waviness, smooth in surface and free from cracking, undercut and the like.
Description
Technical field
The present invention relates to a kind of niobium enhanced wear-resisting surfacing welding and preparation method thereof, belong to technical field of welding materials, be applicable to roll, excavator bucket teeth, the composite manufacturing of turbine blade with the aspect such as to manufacture again.
Background technology
Be on active service when the engineering mechanical components work of wear working condition, not only suffer wear-out failure, also usually with destructions such as impact, corrosion.Conventional cast iron class hardfacing alloy, although hardness is very high, toughness deposit is lower, fracture easily occurs under high impact loads and peels off and cause inefficacy.
It is generally acknowledged, reinforcing material surface strength and the effective way improving wearability are to provide case hardness and the obdurability of material, and ideal institutional framework is the particle tough and tensile, continuous print matrix being uniformly distributed high-melting-point, high rigidity, good stability.The wearability of built-up welding layer mainly relies on the kind of carbide, distribution and area ratio.The chromium contained in high-abrasive material forms double carbide (Cr, Fe) 7C3 with carbon and iron in weld deposit process, is hexagonal prism structure, and hexagon case hardness HV1200 ~ 1800, the hardness ratio front surface of side is slightly low.When in add other carbide former again as Nb, V, Ti etc. time, they all can be combined with carbon and generate the high carbide of stability (fusing point is all greater than 3000 DEG C), and have very high hardness: niobium carbide HV2800, tungsten carbide HV2400, niobium carbide HV2400, titanium carbide HV3200.The carbide high due to these good stabilities, hardness is formed, and has impelled wearability to have and has significantly improved.
The superiority such as welding rod built-up welding has flexible and convenient operation, can carry out all-position welding and welding quality is good, has obvious advantage to the field repair of complicated wear-out part.Welding rod is made up of coating and core wire two parts, very convenient to weld metal alloying by coating, and can realize the effective control to infiltrating alloying element.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide niobium enhanced wear-resisting surfacing welding that a kind of welding procedure is good, wearability is strong and preparation method thereof.
In order to reach the object of foregoing invention, the technical solution adopted in the present invention is:
A kind of niobium enhanced wear-resisting surfacing welding, comprise core wire and be coated on the coating on core wire surface by bonding agent, it is characterized in that, described coating comprises following component, and the mass percentage of each component is:
Marble: 32 ~ 50%;
Fluorite: 15 ~ 25%;
Titanium dioxide: 4 ~ 10%;
Zircon sand: 3 ~ 8%;
Potassic feldspar: 3 ~ 8%;
Rare earth silicon: 4 ~ 8%;
Ferro-niobium: 3 ~ 10%.
Further, described core wire is 1Cr13 or 2Cr13 martensitic stain less steel.And the diameter of described core wire is 3.0 ~ 5.0mm.
Described binding agent is any one in potassium-sodium water glass, clay, white lime.
And the thickness of described coating is 2.0 ~ 2.5mm.
The preparation method of above-mentioned niobium enhanced wear-resisting surfacing welding, is characterized in that, comprise the following steps:
(1) each component of coating is dry mixed: by mass percentage, takes the component marble of coating: 32 ~ 50%; Fluorite: 15 ~ 25%; Titanium dioxide: 4 ~ 10%; Zircon sand: 3 ~ 8%; Potassic feldspar: 3 ~ 8%; Rare earth silicon: 4 ~ 8%; Ferro-niobium: after 3 ~ 10%, is dry mixed;
(2) wet mixing: each component after being dry mixed by coating and bonding agent carry out wet mixing;
(3) prepare niobium enhanced wear-resisting surfacing welding: by the material after wet mixing and core wire through twisting, airing, obtain target product after oven dry.
In addition, each component in niobium enhanced wear-resisting coating of build-up welding bar of the present invention act as:
Marble and fluorite: marble main chemical compositions is CaCO
3, its effect is gas making and slag making, and pyrolytic produces CO
2air-flow blows effect to molten drop, simultaneously CO
2can also reduce molten drop surface tension, impel the droplet transfer, but during marble too high levels, coating gas making is excessive, cause electric arc unstable, splash and increase.Fluorite main chemical compositions is CaF
2, its Main Function is slag making, shoddye and dehydrogenation.The ratio of marble and fluorite affects very large on processing property of electrode, when marble and fluorite ratio are less than 1, and welding rod arc poor stability; When marble and fluorite ratio are greater than 3, weld seam not easily takes off slag and there will be pore, therefore in the present invention, marmorean weight percentage controls 30 ~ 50%, and the weight percentage of fluorite controls 15 ~ 25%.
Titanium dioxide: main chemical compositions is TiO
2, its effect is stabilising arc and reduces splashing, and titanium dioxide can improve electrode coating plasticity simultaneously, improves welding rod extrusion performance;
Zircon sand: main chemical compositions is ZrO
2, fusing point compared with high, thermal conductivity is low, linear expansion coefficient is little, can play the effect improving the weld seam removability of slag in coating;
Potassic feldspar: main chemical compositions is K
2oAl
2o
36SiO
2, its effect is mainly slag making and stabilising arc.Potassium easily ionizes when high temperature, and the free electron in arc column district is increased, thus improves arc stability;
Rare earth silicon: the effect can playing the form of field trash in desulfurization, deoxidation and change weld seam, improves the low-temperature impact toughness of weld seam and the ability of anti-weld crack;
Ferro-niobium: transition niobium element in weld metal, niobium is carbide, can preferentially be combined the stable carbide of formation by carbon in deposited metal, Resistance of Weld Metal plays dispersion-strengtherning and refined crystalline strengthening effect, can ensure its good toughness while raising surfacing layer metal hardness and wearability.
Niobium is carbide, transfer coefficient is very high, scaling loss is few, can preferentially be combined the stable carbide of formation by carbon in deposited metal, tiny and the NbC of Dispersed precipitate has good precipitation strength effect to matrix, meanwhile, niobium can refinement matrix crystal grain, improves intensity and the toughness of surfacing layer metal.Add niobium element strengthening martensitic stain less steel and can obtain all good build-up wear-resistant alloy of wearability, toughness.Welding rod hardfacing alloy of the present invention possesses good wearability and toughness deposit, can be widely used in above-mentioned severe working environment.
Main feature of the present invention is adding niobium element by coating, niobium is preferentially combined with carbon in built-up welding molten pool metal, form the core of niobium carbide non-spontaneous forming core, energy is crystal grain thinning significantly, and niobium carbide can separately exist in hardfacing alloy, play the effect of wear-resisting particle, wearability is improved further.
Beneficial effect of the present invention is: the present invention utilizes niobium to strengthen, surfacing layer metal hardness and wearability can be significantly improved, ensure that the welding technological properties that welding rod is good simultaneously, its result of practical application shows, welding arc stablility during welding rod built-up welding of the present invention, and appearance of weld is attractive in appearance, weld fumes is less, overlay cladding average hardness is HRC46-58, and wearability is 6 ~ 18 times of Q235 carbon steel, and has anti-pore and the advantage such as anti-weld crack ability is strong.And surfacing welding raw material sources of the present invention are extensive, with low cost, flexible to operation, there is excellent application prospect.
Accompanying drawing explanation
Fig. 1 is preparation method's process chart of the present invention.
detailed description of the invention:
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
embodiment 1:
Fig. 1 is preparation method's process chart of the present invention.
As shown in Figure 1: the preparation technology of the embodiment of the present invention 1 is:
(1) each component of coating is dry mixed: by mass percentage, takes the component marble of coating: 40%; Fluorite: 25%; Titanium dioxide: 8%; Zircon sand: 8%; Potassic feldspar: 6%; Rare earth silicon 8%; Ferro-niobium: after 5%, is dry mixed;
(2) wet mixing: each component after being dry mixed by coating and bonding agent potassium-sodium water glass carry out wet mixing;
(3) prepare niobium enhanced wear-resisting surfacing welding: by the material after wet mixing and core wire through twisting, airing, obtain target product after oven dry, wherein core wire is 1Cr13 martensitic stain less steel, diameter of phi 3.2mm, and the thickness of coating is then 2.0 ~ 2.5mm.After tested, welding rod overlay cladding average hardness 48HRC.
embodiment 2:
The preparation technology of the embodiment of the present invention 1 is:
(1) each component of coating is dry mixed: by mass percentage, takes the component marble of coating: 45%; Fluorite: 25%; Titanium dioxide: 8%; Zircon sand: 4%; Potassic feldspar: 4%; Rare earth silicon: 6%; Ferro-niobium: after 8%, is dry mixed;
(2) wet mixing: each component after being dry mixed by coating and bonding agent clay carry out wet mixing;
(3) prepare niobium enhanced wear-resisting surfacing welding: by the material after wet mixing and core wire through twisting, airing, obtain target product after oven dry, wherein core wire is 2Cr13 martensitic stain less steel, diameter of phi 4.0mm, and the thickness of coating is then 2.0 ~ 2.5mm.After tested, welding rod overlay cladding average hardness 55HRC.
embodiment 3:
The preparation technology of the embodiment of the present invention 1 is:
(1) each component of coating is dry mixed: by mass percentage, takes the component marble of coating: 50%; Fluorite: 15%; Titanium dioxide: 4%; Zircon sand: 8%; Potassic feldspar: 7%; Rare earth silicon: 5%; Ferro-niobium: after 10%, is dry mixed;
(2) wet mixing: each component after being dry mixed by coating and bonding agent white lime carry out wet mixing;
(3) prepare niobium enhanced wear-resisting surfacing welding: by the material after wet mixing and core wire through twisting, airing, obtain target product after oven dry, wherein core wire is 1Cr13 martensitic stain less steel, diameter of phi 4.0mm, and the thickness of coating is then 2.0 ~ 2.5mm.After tested, welding rod overlay cladding average hardness 59HRC.
The diameter of steel core used in above-described embodiment is Φ 3.0 ~ 5.0mm.
The present invention utilizes niobium to strengthen, commercially available raw material is utilized to make, surfacing layer metal hardness and wearability can be significantly improved, ensure that the welding technological properties that welding rod is good simultaneously, and with low cost, its result of practical application shows, striking and arcing is easy again during welding rod built-up welding of the present invention, arc stability is current interruption not easily, and blowing force is large; Weld fumes is less, and splashing particle is little, and deposition efficiency is high; De-slag is easy, the defects such as ripple is fine and closely woven, smooth surface, flawless, undercut.Overlay cladding average hardness is HRC46-60, and wearability is 6 ~ 18 times of Q235 carbon steel, and has anti-pore and the advantage such as anti-weld crack ability is strong.
The above is only the preferred embodiment of patent of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from patent principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of patent of the present invention.
Claims (6)
1. a niobium enhanced wear-resisting surfacing welding, comprise core wire and be coated on the coating on core wire surface by bonding agent, it is characterized in that, described coating comprises following component, and the mass percentage of each component is:
Marble: 32 ~ 50%;
Fluorite: 15 ~ 25%;
Titanium dioxide: 4 ~ 10%;
Zircon sand: 3 ~ 8%;
Potassic feldspar: 3 ~ 8%;
Rare earth silicon: 4 ~ 8%;
Ferro-niobium: 3 ~ 10%.
2. a kind of niobium enhanced wear-resisting surfacing welding according to claim 1, is characterized in that, described core wire is 1Cr13 or 2Cr13 martensitic stain less steel.
3. a kind of niobium enhanced wear-resisting surfacing welding according to claim 1 and 2, is characterized in that, the diameter of described core wire is 3.0 ~ 5.0mm.
4. a kind of niobium enhanced wear-resisting surfacing welding according to claim 1, is characterized in that, described binding agent is any one in potassium-sodium water glass, clay, white lime.
5. a kind of niobium enhanced wear-resisting surfacing welding according to claim 1, is characterized in that, the thickness of described coating is 2.0 ~ 2.5mm.
6. a preparation method for niobium enhanced wear-resisting surfacing welding according to claim 1, is characterized in that, comprise the following steps:
(1) each component of coating is dry mixed: by mass percentage, takes the component marble of coating: 32 ~ 50%; Fluorite: 15 ~ 25%; Titanium dioxide: 4 ~ 10%; Zircon sand: 3 ~ 8%; Potassic feldspar: 3 ~ 8%; Rare earth silicon: 4 ~ 8%; Ferro-niobium: after 3 ~ 10%, is dry mixed;
(2) wet mixing: each component after being dry mixed by coating and bonding agent carry out wet mixing;
(3) prepare niobium enhanced wear-resisting surfacing welding: by the material after wet mixing and core wire through twisting, airing, obtain target product after oven dry.
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|---|---|---|---|
| CN201410603077.8A CN104476012A (en) | 2014-10-31 | 2014-10-31 | Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof |
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|---|---|---|---|
| CN201410603077.8A CN104476012A (en) | 2014-10-31 | 2014-10-31 | Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111687563A (en) * | 2020-06-28 | 2020-09-22 | 郑州大学 | Flux-cored wire capable of improving hardness of surfacing alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111687563A (en) * | 2020-06-28 | 2020-09-22 | 郑州大学 | Flux-cored wire capable of improving hardness of surfacing alloy |
| CN111687563B (en) * | 2020-06-28 | 2022-01-11 | 郑州大学 | Flux-cored wire capable of improving hardness of surfacing alloy |
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