CN106065449A - A kind of preparation technology of WC Co series hard metal - Google Patents
A kind of preparation technology of WC Co series hard metal Download PDFInfo
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- CN106065449A CN106065449A CN201610606657.1A CN201610606657A CN106065449A CN 106065449 A CN106065449 A CN 106065449A CN 201610606657 A CN201610606657 A CN 201610606657A CN 106065449 A CN106065449 A CN 106065449A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to the preparation technology of a kind of WC Co series hard metal, it includes being placed in heating furnace WC powder, adds Co powder after dissolving, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；Alloy strip is immersed in hydrochloric acid, is washed out, is dried；The dried alloy strip of cutting, then ball milling, obtain alloyed powder；Above-mentioned alloyed powder is placed in graphite jig and carries out hot pressed sintering, sintered rear mould unloading, obtained hard alloy；Again above-mentioned hard alloy is carried out heat treatment.Aluminium alloy is thrown away by the present invention by the red copper wheel rotated, and aluminium alloy can be made quickly to cool down, it is ensured that metal is shorter in the hot stage time of staying, and alloying element has little time to spread, thus thinning microstructure, reduce segregation；Meanwhile, WC Co alloyed powder is carried out hot pressed sintering and heat treatment, the Hardmetal materials of higher hardness and intensity can be obtained.
Description
Technical field
The present invention relates to copper-based alloy material, specifically the preparation technology of WC-Co series hard metal.
Background technology
The consumption of mine, coal and oil drilling hard alloy is very big, and these rock drilling sintered-carbide tools are due to skill
The restriction of art, varies less for many years, and these changes are nothing but by precision controlling alloy degree of purity and Binder Phase composition etc..
Mine hard alloy instrument mainly uses WC-Co alloy at present.Generally, drilling well is used, coal mining is used and Colophonium cutting
WC and 6 11%Co is consisted of with the alloy on percussion drill bit, and the alloy of different purposes, because the raising of some performance is led
Cause the reduction of other performances.Toughness as usual in high-wear-resistant alloy is bad, otherwise, the Wear Resistance of good toughness is the best.Reduce
Co content and raising hardness can reduce alloy abrasion, and increase Co content and can improve impact flexibility with strengthening WC grain degree.
At present, the preparation of WC-Co alloy can use the technique such as laminating, sintering, and the WC-Co prepared by these techniques is hard
The WC grain of matter alloy is continuous distribution, and has the alloy of Co phase gradient, and thin brilliant side has higher hardness, coarse-grain side
There is certain bending strength；When sintering, Co phase migrates to thin brilliant side from coarse-grain side, and its hardness and intensity are not enough.With
Continually developing and applying of natural resources, the requirement to mine hard alloy is more and more higher, not only needs higher-strength, relatively
The sintered-carbide tool of good hardness.
Summary of the invention
For above-mentioned technical problem, the present invention provides a kind of and prepares the WC-Co system hard conjunction that hardness is relatively big, intensity is higher
The preparation technology of gold.
The technical solution used in the present invention is: the preparation technology of a kind of WC-Co series hard metal, and it comprises the following steps:
(1) WC powder is placed in heating furnace, after dissolving, adds Co powder, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；
(2) the red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；
(3) alloy strip is immersed in hydrochloric acid, is washed out, is dried；
(4) the dried alloy strip of cutting, then ball milling, obtains alloyed powder；
(5) above-mentioned alloyed powder is placed in graphite jig carries out hot pressed sintering, sintered rear mould unloading, obtained hard alloy；
(6) more above-mentioned hard alloy is carried out heat treatment.
As preferably, in WC powder and Co powder, Co accounts for 5 10%.
As preferably, during hot pressed sintering, first sinter 20 30s with the temperature of 280 320 DEG C, then with 500 600 DEG C
Temperature sinters 40 60s, then sinters 20 30s with 650 700 DEG C of temperature.
As preferably, heat treatment uses solid solution, cold pressing deformation and Ageing Treatment successively.
As preferably, the temperature of solution treatment is 650 700 DEG C, and the time is 10 12min.
As preferably, the deflection of colding pressing of deformation process of colding pressing is 30 35%.
As preferably, the temperature of Ageing Treatment is 300 350 DEG C, and the time is 2 3h.
As preferably, Ball-milling Time is 18 22h, and ratio of grinding media to material is 4.5:1.
As can be known from the above technical solutions, aluminium alloy is thrown away by the present invention by the red copper wheel rotated, and aluminium alloy can be made quick
Cooling, it is ensured that metal is shorter in the hot stage time of staying, alloying element has little time to spread, thus thinning microstructure, reduce segregation；
Meanwhile, WC-Co alloyed powder is carried out hot pressed sintering and heat treatment, the Hardmetal materials of higher hardness and intensity can be obtained.
Detailed description of the invention
The present invention is described more detail below, and illustrative examples and explanation in this present invention are used for explaining the present invention,
But it is not as a limitation of the invention.
A kind of preparation technology of WC-Co series hard metal, it comprises the following steps:
With WC, Co powder as raw material, and it is 5 10wt% dispensings by the content of Co；Then WC powder is placed in induction heater, molten
Add Co powder after solution, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating gets rid of
Going out, cooling obtains alloy strip；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, to remove the oxide layer of alloy strip surface, and
After the rinsing of repeatedly distilled water and washes of absolute alcohol, then dry in vacuum drying oven；The dried alloy strip of cutting, then ball
Mill, obtains alloyed powder；Ball-milling Time is 18 22h, and ratio of grinding media to material is 4.5:1.
Above-mentioned alloyed powder is placed in graphite jig and carries out hot pressed sintering, sintered rear mould unloading, obtain hard alloy material
Material；Hot pressed sintering is carried out in three stages, first sinters 20 30s with the temperature of 280 320 DEG C, then with 500 600 DEG C of temperature
Sinter 40 60s, then sinter 20 30s with 650 700 DEG C of temperature；First stage belongs to the sintering preparatory stage, for further
Sintering environment purification；Second stage, along with the rising of temperature, initially forms sintering neck, and mutually ties between alloying substance granule
Closing, particle surface oxide generation reduction reaction, thus continue to participate in sintering, intergranular combination encloses sky each other
Gap；The sintering temperature of three phases is higher, and intergranular sintering neck is grown up further, and more granule is merged, sintering
Body is shunk further, nodularization, thus intensity and the hardness of material is prepared in raising.
Above-mentioned powdered metallurgical material is carried out heat treatment；Heat treatment uses solid solution, cold pressing deformation and Ageing Treatment successively；Gu
The temperature of molten process is 650 700 DEG C, and the time is 10 12min, so can control nickel, the aluminum solid solubility in Copper substrate and
Grain size；Solid solubility temperature is too high, can cause coarse grains, reduces alloy strength；Solid solubility temperature is too low, though crystal grain is less, but
Follow-up Ageing Treatment can be caused to be difficult to play the effect of reinforced alloys.
As preferably, the deflection of colding pressing of deformation process of colding pressing is 30 35%；Before Ageing Treatment, alloy is carried out cold working
Deformation, can make alloy present the double effects of working hardening and ageing strengthening；The temperature of Ageing Treatment is 300 350 DEG C, the time
It is 2 3h；Ageing Treatment can separate out the second phase, produces dispersion-strengtherning.
Embodiment 1
Being placed in induction heater by 95wt %WC powder, add 5wt %Co powder after dissolving, the particle diameter of WC, Co powder is 36 μm, Co
The particle diameter of powder is 0.5 0.8 μm, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；Alloy liquid droplet is dropped down onto the red copper of high speed rotating
Wheel surface throws away, and cooling obtains alloy strip；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and rinses through repeatedly distilled water
After washes of absolute alcohol, then dry in vacuum drying oven；Then the dried alloy strip of cutting, then use the ball of 4.5:1
Material ratio ball milling 18h, obtains alloyed powder；Alloyed powder is placed in graphite jig, first sinters 30s with the temperature of 280 DEG C, then with
500 DEG C of temperature sintering 60s, then with 650 DEG C of temperature sintering 30s；Subsequently with 650 DEG C of solution treatment 12min；Then cold pressing at deformation
Reason, deflection of colding pressing is 30%；Last with 300 DEG C of Ageing Treatment 3h, obtain WC-Co hard alloy material.Record the hard of this material
Degree is 52.3HRC, and shear strength is 624.6MPa.
Embodiment 2
Being placed in induction heater by 92wt %WC powder, add 8wt %Co powder after dissolving, the particle diameter of WC, Co powder is 36 μm, Co
The particle diameter of powder is 0.5 0.8 μm, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；Alloy liquid droplet is dropped down onto the red copper of high speed rotating
Wheel surface throws away, and cooling obtains alloy strip；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and rinses through repeatedly distilled water
After washes of absolute alcohol, then dry in vacuum drying oven；Then the dried alloy strip of cutting, then use the ball of 4.5:1
Material ratio ball milling 20h, obtains alloyed powder；Alloyed powder is placed in graphite jig, first sinters 25s with the temperature of 300 DEG C, then with
560 DEG C of temperature sintering 50s, then with 680 DEG C of temperature sintering 25s；Subsequently with 680 DEG C of solution treatment 11min；Then cold pressing at deformation
Reason, deflection of colding pressing is 32%；Last with 330 DEG C of Ageing Treatment 2.5h, obtain WC-Co hard alloy material.Record this material
Hardness is 69.8HRC, and shear strength is 687.1MPa.
Embodiment 3
Being placed in induction heater by 90wt %WC powder, add 10wt %Co powder after dissolving, the particle diameter of WC, Co powder is 36 μm,
The particle diameter of Co powder is 0.5 0.8 μm, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；Alloy liquid droplet is dropped down onto the purple of high speed rotating
Copper wheel surface throws away, and cooling obtains alloy strip；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and floats through repeatedly distilled water
Wash with washes of absolute alcohol after, then in vacuum drying oven dry；Then the dried alloy strip of cutting, then use 4.5:1's
Ratio of grinding media to material ball milling 22h, obtains alloyed powder；Alloyed powder is placed in graphite jig, first sinters 20s with the temperature of 320 DEG C, then with
600 DEG C of temperature sintering 40s, then with 700 DEG C of temperature sintering 20s；Subsequently with 700 DEG C of solution treatment 10min；Then cold pressing at deformation
Reason, deflection of colding pressing is 35%；Last with 350 DEG C of Ageing Treatment 2h, obtain WC-Co hard alloy material.Record the hard of this material
Degree is 64.6HRC, and shear strength is 634.6MPa.
The technical scheme provided the embodiment of the present invention above is described in detail, specific case used herein
Principle and embodiment to the embodiment of the present invention are set forth, and the explanation of above example is only applicable to help to understand this
The principle of inventive embodiments；Simultaneously for one of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
All will change in formula and range of application, in sum, this specification content should not be construed as limitation of the present invention.
Claims (8)
1. a preparation technology for WC-Co series hard metal, it comprises the following steps:
(1) WC powder is placed in heating furnace, after dissolving, adds Co powder, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；
(2) the red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；
(3) alloy strip is immersed in hydrochloric acid, is washed out, is dried；
(4) the dried alloy strip of cutting, then ball milling, obtains alloyed powder；
(5) above-mentioned alloyed powder is placed in graphite jig carries out hot pressed sintering, sintered rear mould unloading, obtained hard alloy；
(6) more above-mentioned hard alloy is carried out heat treatment.
The preparation technology of hard alloy the most according to claim 1, it is characterised in that: in WC powder and Co powder, Co accounts for 5
10%。
3. the preparation technology of hard alloy as claimed in claim 1, it is characterised in that: during hot pressed sintering, first with 280 320 DEG C
Temperature sinter 20 30s, then sinter 40 60s with 500 600 DEG C of temperature, then with 650 700 DEG C of temperature sintering 20
30s。
4. the preparation technology of hard alloy as claimed in claim 1, it is characterised in that: heat treatment uses solid solution, change of colding pressing successively
Shape and Ageing Treatment.
5. the preparation technology of hard alloy as claimed in claim 4, it is characterised in that: the temperature of solution treatment is 650 700
DEG C, the time is 10 12min.
6. the preparation technology of hard alloy as claimed in claim 4, it is characterised in that: the deflection of colding pressing of deformation process of colding pressing is
30—35%。
7. the preparation technology of hard alloy as claimed in claim 4, it is characterised in that: the temperature of Ageing Treatment is 300 350
DEG C, the time is 2 3h.
8. the preparation technology of hard alloy as claimed in claim 1, it is characterised in that: Ball-milling Time is 18 22h, and ratio of grinding media to material is
4.5:1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756160A (en) * | 2016-11-10 | 2017-05-31 | 无锡市明盛强力风机有限公司 | A kind of preparation method of cermet material |
| CN106811661A (en) * | 2017-02-11 | 2017-06-09 | 丹阳惠达模具材料科技有限公司 | The preparation method of alloy hot-work die base steel steel bonded carbide in a kind of TiC |
| CN108015271A (en) * | 2017-12-12 | 2018-05-11 | 成都育芽科技有限公司 | A kind of 3D printing high strength and modulus composite particulate material preparation method |
| CN111286663A (en) * | 2020-03-27 | 2020-06-16 | 赣州有色冶金研究所 | High-strength high-hardness microcosmic segregation non-uniform-structure hard alloy and preparation method and application thereof |
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| JPS60131944A (en) * | 1983-12-19 | 1985-07-13 | Sumitomo Electric Ind Ltd | Superheat-and wear-resistant aluminum alloy and its manufacture |
| CN104388722A (en) * | 2014-11-07 | 2015-03-04 | 厦门钨业股份有限公司 | Hard alloy with binding phase intensified by virtue of heat treatment and preparation method of hard alloy |
| CN104946915A (en) * | 2015-07-03 | 2015-09-30 | 东北大学 | Preparation method of fine-grained CuCr alloy |
-
2016
- 2016-07-29 CN CN201610606657.1A patent/CN106065449A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131944A (en) * | 1983-12-19 | 1985-07-13 | Sumitomo Electric Ind Ltd | Superheat-and wear-resistant aluminum alloy and its manufacture |
| CN104388722A (en) * | 2014-11-07 | 2015-03-04 | 厦门钨业股份有限公司 | Hard alloy with binding phase intensified by virtue of heat treatment and preparation method of hard alloy |
| CN104946915A (en) * | 2015-07-03 | 2015-09-30 | 东北大学 | Preparation method of fine-grained CuCr alloy |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756160A (en) * | 2016-11-10 | 2017-05-31 | 无锡市明盛强力风机有限公司 | A kind of preparation method of cermet material |
| CN106811661A (en) * | 2017-02-11 | 2017-06-09 | 丹阳惠达模具材料科技有限公司 | The preparation method of alloy hot-work die base steel steel bonded carbide in a kind of TiC |
| CN108015271A (en) * | 2017-12-12 | 2018-05-11 | 成都育芽科技有限公司 | A kind of 3D printing high strength and modulus composite particulate material preparation method |
| CN111286663A (en) * | 2020-03-27 | 2020-06-16 | 赣州有色冶金研究所 | High-strength high-hardness microcosmic segregation non-uniform-structure hard alloy and preparation method and application thereof |
| CN111286663B (en) * | 2020-03-27 | 2021-08-27 | 赣州有色冶金研究所有限公司 | High-strength high-hardness microcosmic segregation non-uniform-structure hard alloy and preparation method and application thereof |
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Application publication date: 20161102 |