CN110394566A - A kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod and preparation method - Google Patents
A kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod and preparation method Download PDFInfo
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- CN110394566A CN110394566A CN201910725941.4A CN201910725941A CN110394566A CN 110394566 A CN110394566 A CN 110394566A CN 201910725941 A CN201910725941 A CN 201910725941A CN 110394566 A CN110394566 A CN 110394566A
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- tungsten carbide
- core
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- powder
- carbide particle
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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
- B23K35/02—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
-
- 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
- B23K35/368—Selection of non-metallic compositions of core 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
- B23K35/406—Filled tubular wire or rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
A kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod and preparation method, including crust and medicine core, medicine core is by wrapping up rich carbon cemented tungsten carbide outside cast tungsten carbide, Ni-based layer core-shell structure tungsten carbide is wrapped up outside rich carbon cemented tungsten carbide and forms the double-deck core-shell structure casting carbon tungsten carbide particle, wraps up crust outside medicine core；Casting carbon tungsten carbide particle is subjected to surface carburization process, by cast tungsten carbide, alloyed powder, high temperature under vacuum after machine binder is mixed with carbon black and nickel powder, after keep the temperature, it is modified to form the double-deck core-shell structure, it is modified to form rich carbon cemented tungsten carbide and Ni-based shell in extra-granular, obtain core-shell structure casting carbon tungsten carbide particle core wire, it wraps up crust and supports welding rod, the present invention is while refining tungsten carbide particle, effectively reduce cost, increase interface transition layer, hard tungsten carbide particle is not easily to fall off in overlay cladding, effectively increase the hardness and wearability for covering layer.
Description
Technical field
The invention belongs to weld consumptive material technical field, and in particular to a kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod
And preparation method.
Background technique
To the weld deposit repairing of chemical industry equipment and various equipment wearing positions, as machinery in metallurgical machinery, mine, track switch,
Bricks machine reamer, spiral, blade of stirrer, fan blade, benficiation machinery, the engineering machines such as Jaw plate, scraper bowl, teeth, engineering quarrying ship
Tool, building material machinery, improve its service performance and the service life is urgently to be resolved.More wearing composite material is studied at present to generally use
Casting carbon tungsten carbide particle enhance iron base composite material, this is because casting carbon tungsten carbide particle can with high temperature iron liquid complete wetting,
So that material is readily formed processing and quality is stablized.Common welding rod flux cored filler material is all made of cemented tungsten carbide particles, casting
Make the hybrid particles of tungsten carbide particle or the two.But two problems are mainly found under study for action, and first, cemented tungsten carbide
Mainly based on WC, purity is higher but higher cost, and the cost of cast tungsten carbide is compared to lower, wherein mainly contain WC and
W2C.Compared with single-phase WC particle, WC/W2C has higher hardness and toughness and cheap, but the decomposition of particle is compared
Seriously, to influence the wear-resisting property of overlay cladding.The major defect of tungsten carbide is that oxidation-resistance property is poor, 500 ~ 800
By severe oxidation in DEG C air, W is easily decomposed by heat-flash in oxidizing atmosphere2C and carbon, i.e., it is so-called " carbon loss ".This can lead to
It crosses and does wrapping layer or Binder Phase with the metal of heat-resisting oxidation-resistance, WC particle is protected in advance；It can also be dissolved with TaC, TIC etc.
Double carbide is formed, the heat-resisting oxidation-resistance performance of tungsten carbide is improved.WC is heated to 2850 DEG C of still stable, In in an ar atmosphere
It is also unaffected in high temperature nitrogen.Therefore after can in advance mixing tungsten carbide particle respectively with carbon black and nickel powder, by being sintered
To the tungsten carbide shell and nickel layer of rich carbon, the wetability of casting carbon tungsten carbide particle is improved.Second, it is sent out by first-principles calculations
Existing, C terminates the wetability for being better than W termination and iron with the wetability of iron in WC particle.In conjunction with these two types of technical essentials, can pass through
Sintering technology obtains the casting carbon tungsten carbide particle with the double-deck core-shell structure, i.e. carbide layers and nickel layer wrap up cast tungsten carbide
Grain, research finds to prepare the casting carbon tungsten carbide particle type filler rod of core-shell structure, bright in the factors such as performance and cost performance
It is aobvious to be better than directly adding cemented tungsten carbide.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of double-deck core-shell structure casting carbonizations
Tungsten particle welding rod and preparation method, after being mixed by casting carbon tungsten carbide particle with carbon black, nickel powder, vacuum-sintering obtains the double-deck nucleocapsid
The tungsten-carbide powder of structure, when high temperature built-up welding, can effectively prevent tungsten carbide particle to decompose, while can be even closer with matrix
Combination, improve product wear resistance.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, including crust and medicine core, medicine core outside cast tungsten carbide by wrapping up
Rich carbon cemented tungsten carbide, rich carbon cemented tungsten carbide wrap up Ni-based layer core-shell structure tungsten carbide outside and form the double-deck core-shell structure casting carbon
Change tungsten particle, crust is wrapped up outside medicine core；Medicine core further includes alloyed powder and organic binder；The cast tungsten carbide being added in filler
Particle carries out case-carbonizing, infiltration nickel process modification forms the double-deck core-shell structure；
The tungsten carbide particle size distribution is denoted as by weight: 50 ~ 80 mesh accounting of granularity is that 25 ~ 45%, 80 ~ 200 mesh accountings are
30~100%；
The cast tungsten carbide accounting is 70~90%, alloyed powder is ferromanganese powder, nickel powder, niobium powder ferrosilicon powder mixture be 5 ~
15%, machine binder 1~5%, welding rod weight ratio shared by filler is 70~80%.
The crust is nickel alloy, cobalt alloy or copper alloy.
The alloyed powder is aluminium powder, ferromanganese powder, ferrosilicon powder, nickel powder, chromium powder, niobium powder, any one or more in copper powder
Alloyed powder and mixture.
The organic binder is organic resin.
A kind of preparation method of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, comprising the following steps:
1) cast tungsten carbide main component is WC/W2Cp, casting carbon tungsten carbide particle is carried out by surface by 1 ~ 10% nano carbon black
Carburization process is heated to 1500 ~ 1900 DEG C after mixing the cast tungsten carbide after carburizing with alloyed powder, machine binder under vacuum
Sintering keeps the temperature 1~2h, obtains the double-deck core-shell structure tungsten carbide, it is modified can extra-granular formed rich carbon cemented tungsten carbide and
Ni-based shell, average thickness are 3~12 μm, obtain the double-deck core-shell structure casting carbon tungsten carbide particle core wire；
2) seamed cladding or seamless cladding is selected in the double-deck core-shell structure casting carbon tungsten carbide particle core wire that step 1) is made
Crust is coated, welding rod crust is prepared using drawing or extruding, the double-deck core-shell structure that diameter range is 3~18mm is finally obtained and casts
Make tungsten carbide particle welding rod.
The crust is rolled into tubulose or flat by nickel alloy, cobalt alloy or copper alloy, and pipe thickness is 0.2~1mm.
The rich carbon cemented tungsten carbide and Ni-based shell have good wetability with matrix.
The beneficial effects of the present invention are:
1, after present invention casting carbon tungsten carbide particle is mixed with carbon black, nickel powder, vacuum-sintering obtains the tungsten carbide of double-shell structure
Powder, cost of material is low, and process controllability is strong, and the overlay cladding effect wearability of acquisition is preferable, is not easily decomposed under WC high temperature, with base
Body is tightly combined, and is suitable for being mass produced.
2, the casting carbon tungsten carbide particle filler rod of core-shell structure is prepared, overlay cladding effect wearability is preferable, WC particle
It is not easily decomposed under high temperature, is suitable for being mass produced.
3, vacuum-sintering obtains the tungsten-carbide powder of " rich carbon " core-shell structure, can effectively prevent being carbonized when high temperature built-up welding
Tungsten particle decomposes, and improves product wear resistance.
4, it can effectively ensure that tungsten carbide particle high temperatures do not decompose, therefore can be improved the wearability of overlay cladding
Energy.
5, it is applied to the bricks machine reamers, spiral shell such as metallurgical machinery, mining machinery, track switch, Jaw plate, scraper bowl, teeth, engineering quarrying ship
The welding such as rotation, blade of stirrer, fan blade, benficiation machinery, engineering machinery, building material machinery, solderability is good, resists rock sand mill
Equal abrasive grains abrasive wear.
Detailed description of the invention
Fig. 1 is welding rod structural schematic diagram of the present invention.
Fig. 2 is core wire structural schematic diagram of the present invention.
Specific embodiment
Invention is further discussed below below in conjunction with attached drawing, but the present invention does not limit to and following embodiment.
As shown in Figure 1, 2.A kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, including crust and medicine core, medicine core by
Rich carbon cemented tungsten carbide is wrapped up outside cast tungsten carbide, it is in pairs to wrap up Ni-based layer core-shell structure tungsten carbide group outside rich carbon cemented tungsten carbide
Layer core-shell structure casting carbon tungsten carbide particle, medicine core wrap up crust outside；Medicine core further includes alloyed powder and organic binder；Institute in filler
The casting carbon tungsten carbide particle of addition carries out case-carbonizing, infiltration nickel process modification forms the double-deck core-shell structure；
The tungsten carbide particle size distribution is denoted as by weight: 50 ~ 80 mesh accounting of granularity is that 25 ~ 45%, 80 ~ 200 mesh accountings are
30~100%；
The cast tungsten carbide accounting is 70~90%, alloyed powder is ferromanganese powder, nickel powder, niobium powder ferrosilicon powder mixture be 5 ~
15%, machine binder 1~5%, welding rod weight ratio shared by filler is 70~80%.
The crust is nickel alloy, cobalt alloy or copper alloy.
The alloyed powder is aluminium powder, ferromanganese powder, ferrosilicon powder, nickel powder, chromium powder, niobium powder, any one or more in copper powder
Alloyed powder and mixture.
The organic binder is organic resin.
A kind of preparation method of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, comprising the following steps:
1) cast tungsten carbide main component is WC/W2Cp, casting carbon tungsten carbide particle is carried out by surface by 1 ~ 10% nano carbon black
Carburization process is heated to 1500 ~ 1900 DEG C after mixing the cast tungsten carbide after carburizing with alloyed powder, machine binder under vacuum
Sintering keeps the temperature 1~2h, obtains the double-deck core-shell structure tungsten carbide, it is modified can extra-granular formed rich carbon cemented tungsten carbide and
Ni-based shell, average thickness are 3~12 μm, obtain the double-deck core-shell structure casting carbon tungsten carbide particle core wire；
2) seamed cladding or seamless cladding is selected in the double-deck core-shell structure casting carbon tungsten carbide particle core wire that step 1) is made
Crust is coated, welding rod crust is prepared using drawing or extruding, the double-deck core-shell structure that diameter range is 3~18mm is finally obtained and casts
Make tungsten carbide particle welding rod.
The crust is rolled into tubulose or flat by nickel alloy, cobalt alloy or copper alloy, and pipe thickness is 0.2~1mm.
The rich carbon cemented tungsten carbide and Ni-based shell have good wetability with matrix.
Embodiment 1:
Crust uses nickel alloy (ERNiCrMo alloy), medicine core constituent are as follows: casting carbon tungsten carbide particle is according to granularity accounting
20 ~ 50 mesh accountings are 30%, and 50 ~ 200 mesh accountings are 70%.Cast tungsten carbide accounting is 70%, ferromanganese powder, nickel powder, niobium powder, ferrosilicon
Powder mixture is 28%, organic resin 2%, and welding rod weight ratio shared by filler is 70 ~ 80%.Wherein, using globular powdered nickel as binder
When effect it is best.Three-body-abrasion of the present embodiment Jing Guo SiC particulate the experimental results showed that, the wearability of the wearing layer of institute's cladding
30 ~ 40% are improved than existing similar welding rod.
Embodiment 2:
Crust uses copper alloy, medicine core constituent are as follows: casting carbon tungsten carbide particle is that 20 ~ 50 mesh accountings are according to granularity accounting
35%, 50 ~ 200 mesh accountings are 65%.Cast tungsten carbide accounting is 80%, and ferromanganese powder, nickel powder, niobium powder, ferrosilicon powder mixture are 19%,
Organic resin 1%, welding rod weight ratio shared by filler are 70 ~ 80%.Effect when wherein, using globular powdered nickel as binder is best.
Three-body-abrasion of the present embodiment Jing Guo SiC particulate the experimental results showed that, the wearability of the wearing layer of institute's cladding is than existing similar weldering
Item improves 20 ~ 40%.
Claims (7)
1. a kind of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, including crust and medicine core, which is characterized in that medicine core is by casting
Rich carbon cemented tungsten carbide is wrapped up outside tungsten carbide, and Ni-based layer core-shell structure tungsten carbide composition two-layer core is wrapped up outside rich carbon cemented tungsten carbide
Shell structure casting carbon tungsten carbide particle, medicine core wrap up crust outside；Medicine core further includes alloyed powder and organic binder；It is added in filler
Casting carbon tungsten carbide particle, carry out case-carbonizing, seep nickel process modification form the double-deck core-shell structure；
The tungsten carbide particle size distribution is denoted as by weight: 50 ~ 80 mesh accounting of granularity is that 25 ~ 45%, 80 ~ 200 mesh accountings are
30~100%；
The cast tungsten carbide accounting is 70~90%, alloyed powder is ferromanganese powder, nickel powder, niobium powder ferrosilicon powder mixture be 5 ~
29%, machine binder 1~5%, welding rod weight ratio shared by filler is 70~80%.
2. a kind of double-deck core-shell structure casting carbon tungsten carbide particle welding rod according to claim 1, which is characterized in that described
Crust is nickel alloy, cobalt alloy or copper alloy.
3. a kind of double-deck core-shell structure casting carbon tungsten carbide particle welding rod according to claim 1, which is characterized in that described
Alloyed powder is aluminium powder, ferromanganese powder, ferrosilicon powder, nickel powder, chromium powder, niobium powder, any one or more alloyed powder and mixture in copper powder.
4. a kind of double-deck core-shell structure casting carbon tungsten carbide particle welding rod according to claim 1, which is characterized in that described
Organic binder is organic resin.
5. a kind of preparation method of bilayer core-shell structure casting carbon tungsten carbide particle welding rod, which comprises the following steps:
1) cast tungsten carbide main component is WC/W2Cp, casting carbon tungsten carbide particle is carried out by surface by 1 ~ 10% nano carbon black
Carburization process is heated to 1500 ~ 1900 DEG C after mixing the cast tungsten carbide after carburizing with alloyed powder, machine binder under vacuum
Sintering keeps the temperature 1~2h, obtains the double-deck core-shell structure tungsten carbide, it is modified can extra-granular formed rich carbon cemented tungsten carbide and
Ni-based shell, average thickness are 3~12 μm, obtain the double-deck core-shell structure casting carbon tungsten carbide particle core wire；
2) seamed cladding or seamless cladding is selected in the double-deck core-shell structure casting carbon tungsten carbide particle core wire that step 1) is made
Crust is coated, welding rod crust is prepared using drawing or extruding, the double-deck core-shell structure that diameter range is 3~18mm is finally obtained and casts
Make tungsten carbide particle welding rod.
6. according to right to go 5 described in a kind of preparation method of the double-deck core-shell structure casting carbon tungsten carbide particle welding rod, feature
It is, the crust is rolled into tubulose or flat by nickel alloy, cobalt alloy or copper alloy, and pipe thickness is 0.2~1mm.
7. according to right to go 5 described in a kind of preparation method of the double-deck core-shell structure casting carbon tungsten carbide particle welding rod, feature
It is, the rich carbon cemented tungsten carbide and Ni-based shell have good wetability with matrix.
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| CN116425549A (en) * | 2023-04-26 | 2023-07-14 | 西安交通大学 | Preparation method of siliconized graphite based on nano carbon black consumption layer and reaction infiltration |
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| Publication number | Publication date |
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| CN110394566B (en) | 2022-03-25 |
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