CN109133928A - Hammer-crusher Special hammer and preparation method thereof - Google Patents

Hammer-crusher Special hammer and preparation method thereof Download PDF

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Publication number
CN109133928A
CN109133928A CN201811106958.3A CN201811106958A CN109133928A CN 109133928 A CN109133928 A CN 109133928A CN 201811106958 A CN201811106958 A CN 201811106958A CN 109133928 A CN109133928 A CN 109133928A
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hammer
carbide
carbon black
binder
tup
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CN201811106958.3A
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CN109133928B (en
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杨东平
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Henan Sheng Dao Science And Technology Ltd
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Henan Sheng Dao Science And Technology Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/5607—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides
    • C04B35/5626—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on tungsten carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3839—Refractory metal carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3839—Refractory metal carbides
    • C04B2235/3843—Titanium carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/424—Carbon black
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6565—Cooling rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

It is by raw material tungsten carbide 91% ~ 93%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, titanium carbide 0.25 ~ 0.5%, chromium carbide 0.25 ~ 0.5%, pure water 2.5 ~ 3.5% forms after mixing through high temperature sintering the invention discloses a kind of hammer-crusher Special hammer.Raw material proportioning science of the present invention, using tungsten carbide as primary raw material, and it is aided with carbon black, binder, titanium carbide, chromium carbide and pure water, tungsten carbide has superpower hardness, and carbon black removes the oxonium ion in material in mixture of oxygen and other oxides, product characteristic can be improved, titanium carbide, chromium carbide reduce alloy sintering temperature, the intensity and toughness of finished product are improved, pure water is then to guarantee that the mixed uniformity of physics and binder guarantee material isostatic pressing together.For finished product tup when crushing the harder materials such as carbonization stone, service life improves 3 ~ 5 times compared with common iron, substantially prolongs service life, has saved maintenance cost and the labor intensity of maintenance personal, improved work efficiency；It can be used simultaneously in complex environment condition, do not influence its using effect at a temperature of 150 DEG C.

Description

Hammer-crusher Special hammer and preparation method thereof
Technical field
The present invention relates to hammer-crushers, and more particularly, to a kind of hammer-crusher Special hammer, it is dedicated that the invention also includes hammer-crushers The preparation method of tup.
Background technique
Hammer-crusher (hammer mill) is used to be crushed material hard and weak abrasion in various, the in general resistance to compression of material Intensity is no more than 100MPa, and for moisture content less than 15%, the material that is broken is coal, salt, chalk, gypsum, brick and tile, lime stone, shale Deng being also used to the waste material of broken fiber structure, elasticity and the stronger wood fragments head of toughness, paper or broken asbestos cement to recycle stone Cotton fiber etc. can also replace in addition, hammer mill cannot be only used for crushing production line, sand production line processed in mineral processing production line For cone crusher.
Tup is the main working parts of hammer-crusher, and the tup that hammer-crusher uses at present is manganese alloy tup, though it is relatively common Carbon steel it is wear-resisting, hardness is significantly increased, be crushed kaolin, lime stone, slag, marble, cobblestone significant effect, but When broken carbonization stone (such as moissanite) has the material of higher hardness and toughness, tup serious wear, and replace components and take When expenses of labour, cause production efficiency extremely low.
Summary of the invention
The purpose of the present invention is to provide a kind of hammer-crusher Special hammer that can be crushed higher hardness, toughness material, the hammers Head does not influence normal use at a temperature of 150 DEG C, greatly improves work efficiency；The present invention also provides the hammer-crusher special hammers The preparation method of head.
To achieve the above object, the present invention can take following technical proposals:
Hammer-crusher Special hammer of the present invention is by raw material tungsten carbide, carbon black, binder, titanium carbide, chromium carbide and pure water It is formed by after the proportion mixing of following weight percent through high temperature sintering: tungsten carbide 91% ~ 93%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, Titanium carbide 0.25 ~ 0.5%, chromium carbide 0.25 ~ 0.5%, pure water 2.5 ~ 3.5%.
The binder is that viscosity is 39.5 ~ 45.8 mpa.s(mpas) polyvinylpyrrolidone.
Tungsten carbide content >=99% in the tungsten carbide raw material, granularity are 8 ~ 10 μm；The carbon black is high-purity carbon black, Content of ashes < 0.01%；Ti content >=99.5% in the carbonization titanium material, granularity are 5 ~ 7 μm；In the carbonization Cr materials Chromium content >=99.5%, granularity are 5 ~ 7 μm；The 10 μ s/cm of conductivity < of the pure water.
The preparation method of hammer-crusher Special hammer of the present invention includes following specific steps:
The first step, by weight weighing tungsten carbide 90% ~ 92%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, titanium carbide 0.25 ~ 0.5%, Chromium carbide 0.25 ~ 0.5%, pure water 3 ~ 3.5%, and put it into batch mixer mixture uniformly；
The good material of mixture is put into mold, the isostatic pressing under 600 MPa pressure, tup base after molding by second step Material spontaneously dries 24 hours at room temperature, then 3 hours dry under the conditions of drying 8 hours, 105 ± 5 DEG C at a temperature of 60 ± 5 DEG C；
Third step, the tup blank after drying are sintered 1.5 ~ 2 hours under the temperature atmosphere of 1500 DEG C ~ 1650 DEG C nitrogen protections； Then room temperature is cooled the temperature to 100 DEG C/h of falling temperature gradient, obtains Vickers hardness > 2500HV30, bending strength > The finished product tup of 850MPa, relative density > 98%.
The advantage of the invention is that raw material proportioning is scientific, using tungsten carbide as primary raw material, and it is aided with carbon black, binder, carbon Change titanium, chromium carbide and pure water, tungsten carbide has superpower hardness, and carbon black removes the oxygen in material in mixture of oxygen and other oxides Ion, can be improved product characteristic, and titanium carbide, chromium carbide reduce alloy sintering temperature, improve the intensity and toughness of finished product, pure water is then It is to guarantee that the mixed uniformity of physics and binder guarantee material isostatic pressing together.Finished product tup is crushing carbonization stone etc. When harder material, service life compared with common iron improve 3 ~ 5 times, substantially prolong service life, saved maintenance cost and The labor intensity of maintenance personal, improves work efficiency；It can be used simultaneously in complex environment condition, at a temperature of 150 DEG C not Influence its using effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of tup of the present invention.
Specific embodiment
Hammer-crusher Special hammer of the invention, raw material proportioning are as follows: 91% ~ 93%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, Titanium carbide 0.25 ~ 0.5%, chromium carbide 0.25 ~ 0.5%, pure water 2.5 ~ 3.5%.
It is practical when preparing, to guarantee that the quality of tup meets requirement, tungsten carbide content >=99% in tungsten carbide raw material, Its granularity is 8 ~ 10 μm；Carbon black is high-purity carbon black, content of ashes < 0.01%；Be carbonized Ti content >=99.5% in titanium material, Granularity is 5 ~ 7 μm；Be carbonized chromium content >=99.5% in Cr materials, and granularity is 5 ~ 7 μm；The 10 μ s/cm of conductivity < of pure water.It is viscous Knot agent uses viscosity for the polyvinylpyrrolidone of 39.5 ~ 45.8 mpa.s.
The preparation method of hammer-crusher Special hammer of the invention includes following specific steps:
Each raw material of the first step, by weight percentage precise: 91% ~ 93%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, titanium carbide 0.25 ~ 0.5%, chromium carbide 0.25 ~ 0.5%, pure water 2.5 ~ 3.5%；And put it into batch mixer mixture 45-60 minutes, make its mixture Uniformly；
The good material of mixture is put into mold, the isostatic pressing under 600 MPa pressure, tup base after molding by second step Material spontaneously dries 24 hours at room temperature, then 3 hours dry at a temperature of drying 8 hours, 105 DEG C at a temperature of 60 DEG C；
Tup blank after drying is carried out high temperature sintering, under the temperature atmosphere of 1500 DEG C ~ 1650 DEG C nitrogen protections by third step Sintering 1.5 ~ 2 hours；Then room temperature is cooled the temperature to 100 DEG C/h of falling temperature gradient, obtains finished product hammer as shown in Figure 1 Head.
Determination of Hardness is carried out to tup produced by the invention using microhardness tester, using bending strength test instrument to tup Bending strength test is carried out, relative density determination then uses the measuring method of national standard GB/T 4472-2011 product density.
After detecting according to the method described above, the Vickers hardness > 2500HV30 of tungsten carbide tup prepared by the present invention, bending resistance is strong Spend > 850MPa, relative density > 98%.
By the manganese alloy tup that current hammer-crusher uses and the tungsten carbide tup that the present invention fires under same environmental conditions Moissanite synthetic crystal (the column formed body of diameter 28mm, high 50mm) is crushed, manganese alloy tup can be used 3 ~ 5 days (72 ~ 120 hours), tungsten carbide tup then can be used 9 ~ 15 days (216 ~ 360 hours), and service life is greatly improved.

Claims (4)

1. a kind of hammer-crusher Special hammer, it is characterised in that: the tup is by raw material tungsten carbide, carbon black, binder, carbonization Titanium, chromium carbide and pure water are formed as after the proportion mixing of following weight percent through high temperature sintering: tungsten carbide 91% ~ 93%, and carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, titanium carbide 0.25 ~ 0.5%, chromium carbide 0.25 ~ 0.5%, pure water 2.5 ~ 3.5%.
2. hammer-crusher Special hammer according to claim 1, it is characterised in that: the binder is viscosity 39.5 ~ 45.8 The polyvinylpyrrolidone of mpa.s.
3. hammer-crusher Special hammer according to claim 1, it is characterised in that: tungsten carbide content in the tungsten carbide raw material >=99%, granularity is 8 ~ 10 μm；The carbon black is high-purity carbon black, content of ashes < 0.01%；Titanium in the carbonization titanium material Content >=99.5%, granularity are 5 ~ 7 μm；Chromium content >=99.5% in the carbonization Cr materials, granularity are 5 ~ 7 μm；It is described pure The 10 μ s/cm of conductivity < of water.
4. the preparation method of hammer-crusher Special hammer described in claim 1, it is characterised in that: including following specific steps:
The first step, by weight weighing tungsten carbide 90% ~ 92%, carbon black 2 ~ 2.5%, binder 2 ~ 2.5%, titanium carbide 0.25 ~ 0.5%, Chromium carbide 0.25 ~ 0.5%, pure water 3 ~ 3.5%, and put it into batch mixer mixture uniformly；
The good material of mixture is put into mold, the isostatic pressing under 600 MPa pressure, tup base after molding by second step Material spontaneously dries 24 hours at room temperature, then 3 hours dry under the conditions of drying 8 hours, 105 ± 5 DEG C at a temperature of 60 ± 5 DEG C；
Third step, the tup blank after drying are sintered 1.5 ~ 2 hours under the temperature atmosphere of 1500 DEG C ~ 1650 DEG C nitrogen protections； Then room temperature is cooled the temperature to 100 DEG C/h of falling temperature gradient, obtains Vickers hardness > 2500HV30, bending strength > The finished product tup of 850MPa, relative density > 98%.
CN201811106958.3A 2018-09-21 2018-09-21 Special hammer head for hammer crusher and preparation method thereof Active CN109133928B (en)

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CN109133928B CN109133928B (en) 2021-06-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008070329A1 (en) * 2006-12-05 2008-06-12 Federal-Mogul Corporation Method for fusing a hard ceramic-metallic layer on a brake rotor
CN102021464A (en) * 2010-12-15 2011-04-20 中国铝业股份有限公司 Material for aluminium electrolysis crust breaking chip
CN102600928A (en) * 2012-02-29 2012-07-25 中国地质大学（北京） Inserted tooth hammer of crushing machine and preparation method thereof
CN104451322A (en) * 2014-11-25 2015-03-25 广东工业大学 Tungsten carbide-based hard alloy and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008070329A1 (en) * 2006-12-05 2008-06-12 Federal-Mogul Corporation Method for fusing a hard ceramic-metallic layer on a brake rotor
CN102021464A (en) * 2010-12-15 2011-04-20 中国铝业股份有限公司 Material for aluminium electrolysis crust breaking chip
CN102600928A (en) * 2012-02-29 2012-07-25 中国地质大学（北京） Inserted tooth hammer of crushing machine and preparation method thereof
CN104451322A (en) * 2014-11-25 2015-03-25 广东工业大学 Tungsten carbide-based hard alloy and preparation method thereof

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