CN107287460A - A kind of preparation method of hard alloy - Google Patents
A kind of preparation method of hard alloy Download PDFInfo
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- CN107287460A CN107287460A CN201710390320.6A CN201710390320A CN107287460A CN 107287460 A CN107287460 A CN 107287460A CN 201710390320 A CN201710390320 A CN 201710390320A CN 107287460 A CN107287460 A CN 107287460A
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- hard alloy
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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
-
- 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
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of preparation method of hard alloy, including step：WC powders, Co powders, rare earth and alkaline earth are dissolved in after liquid phase dispersion medium respectively, mixing tank, and well mixed obtained mixture is poured into；The mixture is put into the 40h of ball mill ball milling 36, is dried after slurry stirring is dried in vacuo and then added at 100 DEG C, with sieve, material grain is made；It will expect that grain is compressing, dewax, hard alloy is made in the then vacuum-sintering under conditions of 1200 DEG C 1300 DEG C.The preparation method of hard alloy of the present invention, its grain growth is easy to control, it is not necessary to which too high temperature is assisted a ruler in governing a country；It is not oxidizable；Function admirable, cost is low, and process is few and short.
Description
Technical field
The invention belongs to composition metal technical field, it is related to a kind of preparation method of hard alloy.
Background technology
Hardmetal materials are as a kind of wide variety of cutter material and structural material, with a series of excellent performances
Feature：1st, hardness is high and with good wearability and rigidity；2nd, with very high modulus of elasticity, rigidity is good under normal temperature；3rd, resist
Compressive Strength is high, and thermal conductivity factor is big；Chemical stabilization is good, and the acidproof alkali ability of cemented carbide part is strong, and high-temperature oxydation phenomenon is also failed to understand
It is aobvious；4th, chemical stabilization is good, and the acidproof alkali ability of cemented carbide part is strong, and high-temperature oxydation phenomenon is not also obvious；5th, impact flexibility and
Thermal coefficient of expansion is relatively low；The These characteristics of hard alloy, make it be occupied in terms of high-abrasive material, exotic material important
Position.But in the sintering technology of hard alloy, however it remains some problems：The advantage of hydrogen sintering is restitutive protection
Atmosphere, has the disadvantage residual porosity；The advantage of vacuum-sintering is not oxidizable, has the disadvantage that grain growth is difficult to control, the technique hardly possible palm
Hold；The advantage of microwave sintering is that sintering is quick, and function admirable has the disadvantage that cost is high；The advantage of hot pressed sintering is simple to operate, rule
Mould is produced, and has the disadvantage that article shape is simple, cost is high；The advantage of HIP sintering is function admirable, uniformly, has the disadvantage cost
It is high；The advantage of low pressure sintering is that performance is excellent, and uniformity is good, and process is short, has the disadvantage that cost is high；The advantage of SPS sintering is quick, drop
Sintering temperature and low, has the disadvantage cost height, in the Process Exploration stage；The advantage of reaction-sintered be it is indeformable, it is few processing, it is low into
This, has the disadvantage that reaction has residue, performance general.Therefore, it is necessary to seek that a kind of low cost, performance be good, indeformable processing
Method.
The content of the invention
The technical problem to be solved in the present invention is：The grain growth of vacuum-sintering in the prior art is overcome to be difficult to control, work
The problem of skill hardly possible grasp etc..
The technical solution adopted for the present invention to solve the technical problems is：A kind of preparation method of hard alloy is provided, wrapped
Include step：
(1) WC powders, Co powders, rare earth and alkaline earth are dissolved in after liquid phase dispersion medium respectively, pours into mixing tank, and mix
Mixture is uniformly made；
(2) mixture is put into ball mill ball milling 36-40h, slurry is dried in vacuo and then added at 100 DEG C and is stirred
Dried after mixing, with sieve, material grain is made；
(3) it will expect that grain is compressing, dewax, the then vacuum-sintering under conditions of 1200 DEG C -1300 DEG C is made hard and closed
Gold.
As the preferred embodiment of the present invention, in step (1), the WC powders, Co powders, rare earth and alkaline earth
Weight ratio is 2：1：0.1：0.1.
As the preferred embodiment of the present invention, in step (1), suppression is additionally added in the liquid phase dispersion medium
Agent, the inhibitor is WC-Co hard alloy, and the Co contents are 10wt.%.
As the preferred embodiment of the present invention, in step (1), the liquid phase dispersion medium is absolute ethyl alcohol.
As the preferred embodiment of the present invention, in step (2), the medium of the ball milling is alcohol.
As the preferred embodiment of the present invention, in step (2), the slurry by paraffin and gasoline mix after make
.
As the preferred embodiment of the present invention, the weight ratio of the paraffin and the gasoline is 1：5.
As the preferred embodiment of the present invention, in step (2), the sieve is 125 mesh.
As the preferred embodiment of the present invention, the vacuum-sintering includes：Heated up with 12-15 DEG C/min speed
To 1100 DEG C, 1200 DEG C -1300 DEG C then are warming up to 16-18 DEG C/min temperature, and keeps 130-180min, is then dropped
Temperature.
The beneficial effects of the invention are as follows：
Using rare earth and alkaline earth with WC powders, Co powders one react so that grain growth is easy to control, it is not necessary to it is too high
Temperature is assisted a ruler in governing a country；It is not oxidizable；Function admirable, cost is low, and process is few and short.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, but the scope of the present invention is not limited to these
Embodiment.
Embodiment 1
The preparation method of hard alloy described in the present embodiment：WC powders, Co powders, rare earth and alkaline earth are dissolved in into nothing respectively
In water-ethanol, the WC powders, Co powders, the weight ratio of rare earth and alkaline earth are 2：1：0.1：0.1, add the conjunction of WC-Co hard
Gold, wherein Co contents are 10wt.%, are subsequently poured into mixing tank, and well mixed obtained mixture；The mixture is put into ball
Ball milling 36h in grinding machine, the medium of the ball milling is alcohol, is then dried in vacuo and then adds paraffin and gasoline at 100 DEG C
Mixture, the weight ratio of the paraffin and gasoline is 1：5, then, dried after stirring, with the sieve of 125 mesh, material is made
Grain；It will expect that grain is compressing, dewax, vacuum-sintering is warming up to 1100 DEG C with 12 DEG C/min speed, then with 16 DEG C/min's
Temperature is warming up to 120 DEG C, and keeps 130min, then cools, and hard alloy is made.
Embodiment 2
The preparation method of hard alloy described in the present embodiment：WC powders, Co powders, rare earth and alkaline earth are dissolved in into nothing respectively
In water-ethanol, the WC powders, Co powders, the weight ratio of rare earth and alkaline earth are 2：1：0.1：0.1, add the conjunction of WC-Co hard
Gold, wherein Co contents are 10wt.%, are subsequently poured into mixing tank, and well mixed obtained mixture；The mixture is put into ball
Ball milling 38h in grinding machine, the medium of the ball milling is alcohol, is then dried in vacuo and then adds paraffin and gasoline at 100 DEG C
Mixture, the weight ratio of the paraffin and gasoline is 1：5, then, dried after stirring, with the sieve of 125 mesh, material is made
Grain；It will expect that grain is compressing, dewax, vacuum-sintering is warming up to 1100 DEG C with 14 DEG C/min speed, then with 17 DEG C/min's
Temperature is warming up to 1250 DEG C, and keeps 160min, then cools, and hard alloy is made.
Embodiment 3
The preparation method of hard alloy described in the present embodiment：WC powders, Co powders, rare earth and alkaline earth are dissolved in into nothing respectively
In water-ethanol, the WC powders, Co powders, the weight ratio of rare earth and alkaline earth are 2：1：0.1：0.1, add the conjunction of WC-Co hard
Gold, wherein Co contents are 10wt.%, are subsequently poured into mixing tank, and well mixed obtained mixture；The mixture is put into ball
Ball milling 40h in grinding machine, the medium of the ball milling is alcohol, is then dried in vacuo and then adds paraffin and gasoline at 100 DEG C
Mixture, the weight ratio of the paraffin and gasoline is 1：5, then, dried after stirring, with the sieve of 125 mesh, material is made
Grain；It will expect that grain is compressing, dewax, vacuum-sintering is warming up to 1100 DEG C with 15 DEG C/min speed, then with 18 DEG C/min's
Temperature is warming up to 1300 DEG C, and keeps 180min, then cools, and hard alloy is made.
Comparative example 1
The preparation method of hard alloy described in the present embodiment：WC powders, Co powders, rare earth and alkaline earth are dissolved in into nothing respectively
In water-ethanol, the WC powders, Co powders, the weight ratio of rare earth and alkaline earth are 2：1：0.1：0.1, add the conjunction of WC-Co hard
Gold, wherein Co contents are 10wt.%, are subsequently poured into mixing tank, and well mixed obtained mixture；The mixture is put into ball
Ball milling 34h in grinding machine, the medium of the ball milling is alcohol, is then dried in vacuo and then adds paraffin and gasoline at 100 DEG C
Mixture, the weight ratio of the paraffin and gasoline is 1：5, then, dried after stirring, with the sieve of 125 mesh, material is made
Grain；It will expect that grain is compressing, dewax, vacuum-sintering is warming up to 1100 DEG C with 11 DEG C/min speed, then with 15 DEG C/min's
Temperature is warming up to 1100 DEG C, and keeps 120min, then cools, and hard alloy is made.
Comparative example 2
The preparation method of hard alloy described in the present embodiment：WC powders, Co powders, rare earth and alkaline earth are dissolved in into nothing respectively
In water-ethanol, the WC powders, Co powders, the weight ratio of rare earth and alkaline earth are 2：1：0.1：0.1, add the conjunction of WC-Co hard
Gold, wherein Co contents are 10wt.%, are subsequently poured into mixing tank, and well mixed obtained mixture；The mixture is put into ball
Ball milling 42h in grinding machine, the medium of the ball milling is alcohol, is then dried in vacuo and then adds paraffin and gasoline at 100 DEG C
Mixture, the weight ratio of the paraffin and gasoline is 1：5, then, dried after stirring, with the sieve of 125 mesh, material is made
Grain；It will expect that grain is compressing, dewax, vacuum-sintering is warming up to 1100 DEG C with 17 DEG C/min speed, then with 19 DEG C/min's
Temperature is warming up to 1400 DEG C, and keeps 190min, then cools, and hard alloy is made.
Above-described embodiment 1-3 and comparative example 1-2 learn that sintering early stage uses slower programming rate (1100 afterwards after measured
Programming rate before DEG C is 12-15 DEG C/min), reason is to sinter the slower programming rate of early stage to be conducive to removing paraffin, and
Ensure that paraffin steam has fully taken off, prevent it from being remained in idiosome, influence material property.After removing paraffin terminates, heating
Speed accelerates (16-18 DEG C/min), can suppress growing up for crystal grain, be heated to after sintering temperature, is incubated 130-180min, afterwards
Cool to room temperature with the furnace, above-mentioned sintering temperature and soaking time can improve the consistency of material, but too high sintering temperature
Such as comparative example 2 also easily causes Co volatilization, and long soaking time such as comparative example 2 can also promote the excessive length of matrix grain
Greatly, the mechanical property of material is reduced.Sintering temperature is less than 1200 DEG C, and such as comparative example 1, grain growth is incomplete, and crystal grain is more thin
Small, now the intensity and toughness of material are not very high, higher than 1300 DEG C, such as comparative example 2, rapid roughening, Elongated grain occur
Be unfavorable for the raising of material property, 1250 DEG C are preferably, and grain growth is more abundant, and grainiess is more regular, can obtain compared with
High mechanical property.When soaking time is 130-180min, grain growth is full and uniform, and stomata is less, improves material
Performance, when less than 130min, such as comparative example 1, because soaking time is not enough, grain growth is insufficient, this tiny crystal grain
Structure easily causes small defect, so that the mechanical property of material is reduced, when higher than 180min, such as comparative example 2, due to insulation
Overlong time, portion crystal starts to become big thicker, grain coarsening, is unfavorable for the raising of material mechanical performance.
In summary, the preparation method of hard alloy of the present invention, its grain growth is easy to control, it is not necessary to too high
Temperature is assisted a ruler in governing a country；It is not oxidizable；Function admirable, cost is low, and process is few and short.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (9)
1. a kind of preparation method of hard alloy, it is characterised in that including step：
(1) WC powders, Co powders, rare earth and alkaline earth are dissolved in after liquid phase dispersion medium respectively, pours into mixing tank, and be well mixed
Mixture is made；
(2) mixture is put into ball mill ball milling 36-40h, is dried in vacuo and then adds at 100 DEG C after slurry stirring
Dry, with sieve, material grain is made；
(3) it will expect that grain is compressing, dewax, hard alloy is made in the then vacuum-sintering under conditions of 1200 DEG C -1300 DEG C.
2. the preparation method of hard alloy according to claim 1, it is characterised in that in step (1), the WC powders,
The weight ratio of Co powders, rare earth and alkaline earth is 2：1：0.1：0.1.
3. the preparation method of hard alloy according to claim 1, it is characterised in that in step (1), the solution dispersion
Inhibitor is additionally added in medium, the inhibitor is WC-Co hard alloy, and the Co contents are 10wt.%.
4. the preparation method of hard alloy according to claim 1, it is characterised in that in step (1), the solution dispersion
Medium is absolute ethyl alcohol.
5. the preparation method of hard alloy according to claim 1, it is characterised in that in step (2), Jie of the ball milling
Matter is alcohol.
6. the preparation method of hard alloy according to claim 1, it is characterised in that in step (2), the slurry is by stone
It is made after wax and gasoline mixing.
7. the preparation method of hard alloy according to claim 6, it is characterised in that the weight of the paraffin and the gasoline
Amount is than being 1：5.
8. the preparation method of hard alloy according to claim 1, it is characterised in that in step (2), the sieve is
125 mesh.
9. the preparation method of hard alloy according to claim 1, it is characterised in that the vacuum-sintering includes：With 12-
15 DEG C/min speed is warming up to 1100 DEG C, is then warming up to 1200 DEG C -1300 DEG C with 16-18 DEG C/min temperature, and keep
130-180min, then cools.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710390320.6A CN107287460A (en) | 2017-05-27 | 2017-05-27 | A kind of preparation method of hard alloy |
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| CN201710390320.6A CN107287460A (en) | 2017-05-27 | 2017-05-27 | A kind of preparation method of hard alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097655A (en) * | 2018-09-21 | 2018-12-28 | 马鞍山市恒利达机械刀片有限公司 | A kind of manufacturing process of hard alloy replaceable cutter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760685A (en) * | 2008-12-25 | 2010-06-30 | 北京有色金属研究总院 | Superfine WC-Co cemented carbide containing rare-earth elements and preparation method thereof |
| CN102363854A (en) * | 2011-09-23 | 2012-02-29 | 重庆文理学院 | Superfine YG type hard alloy containing light-heavy rare earth and preparation method thereof |
| CN103741001A (en) * | 2014-01-16 | 2014-04-23 | 河源普益硬质合金厂有限公司 | High-hardness and high-strength PY30T hard alloy and preparation method of high-hardness and high-strength PY30T hard alloy product |
-
2017
- 2017-05-27 CN CN201710390320.6A patent/CN107287460A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760685A (en) * | 2008-12-25 | 2010-06-30 | 北京有色金属研究总院 | Superfine WC-Co cemented carbide containing rare-earth elements and preparation method thereof |
| CN102363854A (en) * | 2011-09-23 | 2012-02-29 | 重庆文理学院 | Superfine YG type hard alloy containing light-heavy rare earth and preparation method thereof |
| CN103741001A (en) * | 2014-01-16 | 2014-04-23 | 河源普益硬质合金厂有限公司 | High-hardness and high-strength PY30T hard alloy and preparation method of high-hardness and high-strength PY30T hard alloy product |
Non-Patent Citations (2)
| Title |
|---|
| 周书助: "《硬质合金生产原理和质量控制》", 31 August 2014 * |
| 羊建高: "《硬质合金》", 31 December 2012 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097655A (en) * | 2018-09-21 | 2018-12-28 | 马鞍山市恒利达机械刀片有限公司 | A kind of manufacturing process of hard alloy replaceable cutter |
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Application publication date: 20171024 |