CN106086572A - A kind of preparation technology of hard alloy - Google Patents
A kind of preparation technology of hard alloy Download PDFInfo
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- CN106086572A CN106086572A CN201610606635.5A CN201610606635A CN106086572A CN 106086572 A CN106086572 A CN 106086572A CN 201610606635 A CN201610606635 A CN 201610606635A CN 106086572 A CN106086572 A CN 106086572A
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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
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- 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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to the preparation technology of a kind of hard alloy, 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；Aluminium alloy is poured in mould, is subsequently placed in cold water and is cooled to room temperature, obtain alloy pig；Pulverize after alloy pig is lathed fines, 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.The present invention is poured in mould by aluminium alloy, is subsequently placed in cold water and is cooled to room temperature, makes aluminium alloy quickly 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 Hardmetal materials.
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 system preparing the hard alloy that hardness is relatively big, intensity is higher
Standby technique.
The technical solution used in the present invention is: the preparation technology of a kind of hard alloy, 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) aluminium alloy is poured in mould, is subsequently placed in cold water and is cooled to room temperature, obtain alloy pig；
(3) pulverize after alloy pig being lathed fines, obtain alloyed powder；
(4) above-mentioned alloyed powder is placed in graphite jig carries out hot pressed sintering, sintered rear mould unloading, obtained hard alloy；
(5) 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 can be known from the above technical solutions, the present invention is poured in mould by aluminium alloy, is subsequently placed in cold water and is cooled to
Room temperature, makes aluminium alloy quickly cool down, it is ensured that metal is shorter in the hot stage time of staying, and alloying element has little time diffusion, thus
Thinning microstructure, reduces segregation；Meanwhile, WC-Co alloyed powder is carried out hot pressed sintering and heat treatment, higher hardness can be obtained with strong
The Hardmetal materials of degree.
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 hard alloy, 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；Aluminium alloy is poured in mould, puts rapidly together with mould
In cold water, it is cooled to room temperature, obtains alloy pig；Then pulverize after alloy pig being lathed fines, obtain alloyed powder；
Above-mentioned alloyed powder is placed in graphite jig and carries out hot pressed sintering, sintered rear mould unloading, obtained Hardmetal materials；Heat
Pressure 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 sintering
40 60s, then sinter 20 30s with 650 700 DEG C of temperature；First stage belongs to the sintering preparatory stage, for sintering further
Environment purification；Second stage, along with the rising of temperature, initially forms sintering neck, and be combined with each other between alloying substance granule,
Grain oxide on surface generation reduction reaction, thus continue to participate in sintering, intergranular combination encloses space each other；The
The sintering temperature of three phases is higher, and intergranular sintering neck is grown up further, and more granule is merged, and sintered body obtains
Contraction, nodularization further, 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；Again aluminium alloy is poured in mould, and fast
Speed water-cooled, to room temperature, obtains alloy pig；Then pulverize after alloy pig being lathed fines, obtain alloyed powder；By alloyed powder
It 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 burn with 650 DEG C of temperature
Knot 30s；Subsequently with 650 DEG C of solution treatment 12min；Then colding pressing deformation process, deflection of colding pressing is 30%；Time finally with 300 DEG C
Effect processes 3h, obtains WC-Co hard alloy material.The hardness recording this material is 50.3HRC, and shear strength is 620.4MPa.
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；Again aluminium alloy is poured in mould, and fast
Speed water-cooled, to room temperature, obtains alloy pig；Then pulverize after alloy pig being lathed fines, obtain alloyed powder；By alloyed powder
It 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 burn with 680 DEG C of temperature
Knot 25s；Subsequently with 680 DEG C of solution treatment 11min；Then colding pressing deformation process, deflection of colding pressing is 32%；Time finally with 330 DEG C
Effect processes 2.5h, obtains WC-Co hard alloy material.The hardness recording this material is 68.7HRC, and shear strength is
682.3MPa。
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；Again aluminium alloy is poured in mould, and
Water-cooled is to room temperature rapidly, obtains alloy pig；Then pulverize after alloy pig being lathed fines, obtain alloyed powder；By alloy
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 colding pressing deformation process, deflection of colding pressing is 35%；Last with 350 DEG C
Ageing Treatment 2h, obtains WC-Co hard alloy material.The hardness recording this material is 65.3HRC, and shear strength is
635.1MPa。
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 (7)
1. a preparation technology for hard alloy, 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) aluminium alloy is poured in mould, is subsequently placed in cold water and is cooled to room temperature, obtain alloy pig；
(3) pulverize after alloy pig being lathed fines, obtain alloyed powder；
(4) above-mentioned alloyed powder is placed in graphite jig carries out hot pressed sintering, sintered rear mould unloading, obtained hard alloy；
(5) 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.
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| CN201610606635.5A CN106086572A (en) | 2016-07-29 | 2016-07-29 | A kind of preparation technology of hard alloy |
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| CN201610606635.5A CN106086572A (en) | 2016-07-29 | 2016-07-29 | A kind of preparation technology of hard alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299270A (en) * | 2017-08-21 | 2017-10-27 | 东莞市创金属制品有限公司 | A kind of metal carbide steel |
| CN109468533A (en) * | 2018-11-22 | 2019-03-15 | 杨佳意 | A kind of alloy steel material producing drill bit and its preparation process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544676A (en) * | 2003-11-18 | 2004-11-10 | 株洲硬质合金集团有限公司 | Process for preparing heterogeneous cemented carbide |
| 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 |
| WO2015162206A2 (en) * | 2014-04-24 | 2015-10-29 | Sandvik Intellectual Property Ab | A method of making cermet or cemented carbide powder |
-
2016
- 2016-07-29 CN CN201610606635.5A patent/CN106086572A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544676A (en) * | 2003-11-18 | 2004-11-10 | 株洲硬质合金集团有限公司 | Process for preparing heterogeneous cemented carbide |
| WO2015162206A2 (en) * | 2014-04-24 | 2015-10-29 | Sandvik Intellectual Property Ab | A method of making cermet or cemented carbide powder |
| 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 |
Non-Patent Citations (2)
| Title |
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| 《当代中国有色金属工业》编委会: "《新中国有色金属硬质合金工业》", 31 December 1987 * |
| 朱启扣等: "超细WC-Co复合粉热压烧结制备亚微米硬质合金", 《稀有金属与硬质合金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299270A (en) * | 2017-08-21 | 2017-10-27 | 东莞市创金属制品有限公司 | A kind of metal carbide steel |
| CN109468533A (en) * | 2018-11-22 | 2019-03-15 | 杨佳意 | A kind of alloy steel material producing drill bit and its preparation process |
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