CN106583690A - Method for preparing CuW alloy by adding Ti element - Google Patents
Method for preparing CuW alloy by adding Ti element Download PDFInfo
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- CN106583690A CN106583690A CN201611043930.0A CN201611043930A CN106583690A CN 106583690 A CN106583690 A CN 106583690A CN 201611043930 A CN201611043930 A CN 201611043930A CN 106583690 A CN106583690 A CN 106583690A
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- powder
- addition
- sintering
- prepare
- cuw
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Classifications
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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
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
-
- 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
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
Abstract
The invention discloses a method for preparing CuW alloy by adding a Ti element. The method specifically comprises the following steps: putting W powder, Ti powder and inducing copper powder into a mixing machine for uniform mixing, and pressing the materials for forming to obtain a tungsten pressed blank; then putting the tungsten pressed blank into a hydrogen atmosphere sintering furnace for sintering to obtain a tungsten framework; and finally stacking a pure copper block on the tungsten framework, putting the stacked pure copper block and tungsten framework into the hydrogen atmosphere sintering furnace for infiltrating sintering to obtain the Ti-blended CuW alloy. According to the method, by the adding of the Ti element, good metallurgical bonding of Cu/W is realized; furthermore, formation of a tungsten framework sintered neck is promoted, and the effect of activating sintering is achieved; meanwhile, the adding of the Ti element can well strengthen the weak breakdown phase-Cu phase, so that the prepared Cu(Ti)W alloy is high in intensity and conductivity, and the aim of prolonging the service life of an electric contact is fulfilled.
Description
Technical field
The invention belongs to electrical material preparing technical field, is related to a kind of method that addition Ti elements prepare CuW alloys.
Background technology
Because tungsten has high fusing point and intensity and low thermal coefficient of expansion, copper has good thermal conductivity, institute
So that copper-tungsten shows the performances such as excellent high temperature resistant, resistance to ablation, high intensity, high rigidity.
Conventional CuW contact materials, because the work function of copper is low and fusing point is relatively low, are made in interrupting process in high-temperature electric arc
With under, copper will produce fusing and splash, cause contact material surface irregularity, have a strong impact on stablizing for transmission line of electricity operation
Property and reliability.Therefore, how to improve the resistance to arc erosion performance of contact material becomes the key issue of contact material research.
Adding appropriate active element when prepared by W skeletons can significantly improve the wetability of Cu, W, and with obvious
Activated sintering effect, can promote well tungsten powder densification and improve W skeletons intensity.Research shows, adds in copper
The elements such as Cr, Ni and Fe, not only can improve the interface wet ability between Cu, W, can also make Cu/W interface cohesions by mechanical bond
Differentiation becomes metallurgical binding, and then improves two-phase interface intensity.Understand that Ti and W can form continuous solid solution by binary alloy phase diagram
Body, and Ti also has certain solid solution capacity in Cu.The addition of Ti elements can improve the wetability of Cu, W, be conducive to improving Cu/W
Phase interface bonding strength.In addition, Cu (Ti) W alloy of Jing timeliness Ageing Treatments has good intensity and electric conductivity, Ti elements
Addition can strengthen very well it is weak puncture phase-Cu phases, reach improve electrical contact service life purpose.
The content of the invention
It is an object of the invention to provide a kind of method that addition Ti elements prepare CuW alloys, to improve Cu/W boundaries
Bond strength.
The technical solution adopted in the present invention is, a kind of method that addition Ti elements prepare CuW alloys, specifically by following step
It is rapid to implement：
Step 1, mixes powder：
W powder and Ti powder and induction copper powder are put in batch mixer, absolute ethyl alcohol wet mixing 2～8 hours is added；
Step 2, compacting：
Pour the powder that Jing steps 1 are mixed into mould, it is compressing, obtain tungsten pressed compact；
Step 3, sintering：
The tungsten pressed compact that step 2 is suppressed is put in hydrogen atmosphere sintering furnace and sinters, and cools to room temperature with the furnace, obtains tungsten bone
Frame；
Step 4, it is molten to ooze：
Fine copper block is stacked in into the W skeleton top that step 3 is obtained, it is molten to ooze sintering in being put into hydrogen atmosphere sintering furnace, with
Stove is cooled to room temperature, obtains the CuW alloys of addition Ti.
Feature of the present invention is also resided in,
W powder is according to mass percent with the consumption of Ti powder and induction copper powder in step 1：1:0.5～2.0%:5～
15%.
The addition of absolute ethyl alcohol is the 2～6% of all powder gross mass in step 1..
The particle mean size of W powder is 5～10 μm in step 1,5～40 μm of the particle mean size of Ti powder.
Pressing pressure is 200～400MPa in step 2, and the dwell time is 20～40s.
Sintering parameter is in step 3：It is warming up to 800～1000 DEG C of 0.5～2h of insulation.
The molten sintering parameter that oozes is in step 4：First it is warming up to 800～1000 DEG C of 0.5～2h of insulation, then it is warming up to 1200～
1400 DEG C, it is incubated 1～3h.
The invention has the beneficial effects as follows, the present invention causes Cu/W to realize good metallurgical binding by adding Ti elements,
And the formation that W skeleton sinters neck is promoted, play a part of activated sintering.The addition of Ti elements simultaneously can very well strengthen weak
Puncture phase-Cu phases so that obtained Cu (Ti) W alloy, with good intensity and electric conductivity, improve electrical contact service life
Purpose.
Description of the drawings
Fig. 1 is the process chart of preparation method of the present invention；
Fig. 2 is the SEM photograph of Cu (Ti) W alloy prepared by the inventive method；
Fig. 3 is the EDS energy spectrum analysis figures of Cu (Ti) W alloy prepared by the inventive method；
Fig. 4 is the line scanning figure of Cu (Ti) W alloy prepared by the inventive method.
Specific embodiment
With reference to the present invention is described in detail with specific embodiment.
The invention provides a kind of method that addition Ti elements prepare CuW alloys, as shown in figure 1, specifically according to the following steps
Implement：
Step 1, mixes powder：
W powder that particle mean size is 5～10 μm and 5～40 μm of Ti powder and induction copper powder are put in V-type batch mixer, plus
Enter absolute ethyl alcohol wet mixing 2～8 hours.
Wherein the addition of Ti powder for W silty amounts 0.5～2.0%, induce copper powder addition for W silty amounts 5～
15%.
The addition of absolute ethyl alcohol is the 2～6% of all powder gross mass.
Step 2, compacting：
The mould that the powder mixed Jing step 1 is poured into Jing after releasing agent is smeared, in WE-10 type universal testing machines
On be pressed, obtain tungsten pressed compact.Pressure is 200～400MPa, 20～40s of pressurize, so that gas can be discharged smoothly,
Ensure that powder is fully tamped in die cavity simultaneously.
Step 3, sintering：
The tungsten pressed compact that step 2 is suppressed is put in atmosphere sintering furnace, is passed through after hydrogen 40min and is checked the purity of hydrogen,
Confirm to light hydrogen after safety, after opening cooling water, start to warm up to 800～1000 DEG C of 0.5～2h of insulation, cool to room with the furnace
Temperature, obtains W skeleton.
Step 4, it is molten to ooze：
According to needed for the volume and compact rate of molding of green compact determine sample penetrate into Cu volume, typically should 40 more than calculated value～
80%, to guarantee that infiltration process carries out more fully and complete.Cu blocks should be cleaned or polished after intercepting, and be stained with removing its surface
The impurity of dye.Fine copper block is stacked in into W skeleton top, in placing into sintering furnace.After being passed through hydrogen 40min, inspection hydrogen is pure
Degree, confirms to light hydrogen after safety, after opening cooling water, starts to warm up to 800～1000 DEG C of 0.5～2h of insulation, then is warming up to
1200～1400 DEG C, 1～3h is incubated, cools to room temperature with the furnace, obtain Cu (Ti) W alloy.
The present invention improves the wetability of Cu, W by adding Ti elements in CuW alloys, improves Cu/W boundaries knot
Close intensity.The simultaneously addition of Ti elements can very well be strengthened and weak puncture phase-Cu phases so that obtained Cu (Ti) W alloy, with good
Intensity well and electric conductivity, improve the purpose of electrical contact service life.
Embodiment 1
Weigh the W powder that particle mean size is 8 μm, W silty amount 0.5%, particle mean size is 35 μm of Ti powder, W silty amount 10%
Induction copper powder, add the absolute ethyl alcohol of powder gross mass 2% as process control agent, it is enterprising in the V-type batch mixer of 50r/min
Row batch mixing 8 hours, batch mixing ball is WC hard balls, then mixed-powder is fitted in rigidity mould and is suppressed, and pressure is
300MPa, the dwell time is 30s, obtains pressed compact.W pressed compacts are placed in graphite crucible, then crucible atmosphere sintering furnace is put into into
In, after being passed through hydrogen 40min, hydrogen purity is checked, confirm to light hydrogen after safety, after opening cooling water, begin to warm up, work as burning
When junction temperature is 900 DEG C, after insulation 60min, room temperature is naturally cooled to stove, obtain W skeletons.Polishing was cleaned pure Cu again
Block is stacked to W skeletons top, and then crucible is put in atmosphere sintering furnace, after being passed through hydrogen 40min, checks hydrogen purity, really
Recognize after safety and light hydrogen, after opening cooling water, begin to warm up, when infiltrating temperature is 900 DEG C, after insulation 60min, reheat
To 1200 DEG C, 3 hours are incubated, with stove room temperature is naturally cooled to, that is, make CuW (Ti) alloy.
Embodiment 2
The W powder that particle mean size is 5 μm is weighed, W silty amount 1.0%, particle mean size is 5 μm of Ti powder, W silty amount 5%
Induction copper powder, adds the absolute ethyl alcohol of powder gross mass 5% as process control agent, carries out on the V-type batch mixer of 50r/min
Batch mixing 4 hours, batch mixing ball is WC hard balls, then mixed-powder is fitted in rigidity mould and is suppressed, and pressure is 400MPa,
Dwell time is 20s, obtains W pressed compacts.W pressed compacts are placed in graphite crucible, then crucible is put in atmosphere sintering furnace, be passed through
After hydrogen 40min, hydrogen purity is checked, confirm to light hydrogen after safety, after opening cooling water, begun to warm up, work as sintering temperature
For 800 DEG C when, after insulation 2h, with stove room temperature is naturally cooled to, obtain W skeletons, then the clean pure Cu blocks of polishing are stacked to into W bones
Frame top, is then put into crucible in atmosphere sintering furnace, after being passed through hydrogen 40min, checks hydrogen purity, confirms to be lighted after safety
Hydrogen, after opening cooling water, begins to warm up, and when infiltrating temperature is 800 DEG C, after insulation 2h, is again heated to 1300 DEG C, insulation
1.5 hours, room temperature is naturally cooled to stove, that is, make CuW (Ti) alloy.
Embodiment 3
Weigh the W powder that particle mean size is 10 μm, W silty amount 1.5%, particle mean size is 40 μm of Ti powder, W silty amount 12%
Induction copper powder, add the absolute ethyl alcohol of powder gross mass 6% as process control agent, it is enterprising in the V-type batch mixer of 50r/min
Row batch mixing 6 hours, batch mixing ball is WC hard balls, then mixed-powder is fitted in rigidity mould and is suppressed, and pressure is
350MPa, the dwell time is 35s, obtains pressed compact.Pressed compact is placed in graphite crucible, then crucible atmosphere sintering furnace is put into into
In, after being passed through hydrogen 40min, hydrogen purity is checked, confirm to light hydrogen after safety, after opening cooling water, begin to warm up, work as burning
When junction temperature is 1000 DEG C, after insulation 0.5h, room temperature is naturally cooled to stove, obtain W skeletons.Polishing is cleaned pure Cu blocks again
W skeletons top is stacked to, then crucible is put in atmosphere sintering furnace, after being passed through hydrogen 40min, check hydrogen purity, confirmed
Hydrogen is lighted after safety, after opening cooling water, is begun to warm up, when infiltrating temperature is 1000 DEG C, after insulation 0.5h, be again heated to
1400 DEG C, 1 hour is incubated, with stove room temperature is naturally cooled to, that is, make Cu (Ti) W alloy.
Fig. 2 is the SEM photograph of CuW alloys prepared by the present invention, as can be seen that the addition of Ti elements, promotes from picture
W particles sinter the formation of neck, make to form good metallurgical binding between Cu/W boundaries.
Fig. 3 is the EDS energy spectrum analysis figures of CuW alloys prepared by the present invention.The Ti elements of addition are deposited on Cu/W boundaries
Promoting the metallurgical binding at its interface.Part Ti elements in the form of Ti particles (about 1 μm) on boundary, power spectrum
Analysis result is shown in Table 1, and as can be seen from the table the position at 2 points of places of A has a certain amount of C element and Ti elements, illustrates addition
Ti elements are possible to generate TiC.Research shows that the presence of TiC can be played a part of to disperse electric arc.B points are located at W-W interfaces
There is a certain amount of Ti elements in place, interface, illustrate that Ti elements promote the formation that W particles sinter neck, play activated sintering
Effect.
The EDS EDAX results of table 1Cu (Ti) W alloy
Fig. 4 is the line scanning figure of Cu (Ti) W alloy prepared by the present invention.As can be seen from the figure the Ti elements for adding are uniform
It is distributed in Cu, W two-phase.
Claims (7)
1. a kind of method that addition Ti elements prepare CuW alloys, it is characterised in that specifically implement according to the following steps：
Step 1, mixes powder：
W powder and Ti powder and induction copper powder are put in batch mixer, absolute ethyl alcohol wet mixing 2～8 hours is added；
Step 2, compacting：
Pour the powder that Jing steps 1 are mixed into mould, it is compressing, obtain tungsten pressed compact；
Step 3, sintering：
The tungsten pressed compact that step 2 is suppressed is put in hydrogen atmosphere sintering furnace and sinters, and cools to room temperature with the furnace, obtains W skeleton；
Step 4, it is molten to ooze：
Fine copper block is stacked in into the W skeleton top that step 3 obtains, it is molten to ooze sintering in being put into hydrogen atmosphere sintering furnace, it is cold with stove
But to room temperature, the CuW alloys of addition Ti are obtained.
2. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 1
Middle W powder and Ti powder and induction copper powder are according to mass percent：1:0.5～2.0%:5～15%.
3. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 1
The addition of middle absolute ethyl alcohol is the 2～6% of all powder gross mass.
4. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 1
The particle mean size of middle W powder is 5～10 μm, 5～40 μm of the particle mean size of Ti powder.
5. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 2
Middle pressing pressure is 200～400MPa, and the dwell time is 20～40s.
6. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 3
Middle sintering parameter is：It is warming up to 800～1000 DEG C of 0.5～2h of insulation.
7. the method that a kind of addition Ti elements according to claim 1 prepare CuW alloys, it is characterised in that the step 4
In the molten sintering parameter that oozes be：800～1000 DEG C of 0.5～2h of insulation are first warming up to, then are warming up to 1200～1400 DEG C, insulation 1～
3h。
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| CN201611043930.0A CN106583690B (en) | 2016-11-24 | 2016-11-24 | A method of addition Ti element prepares CuW alloy |
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| CN201611043930.0A CN106583690B (en) | 2016-11-24 | 2016-11-24 | A method of addition Ti element prepares CuW alloy |
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| CN106583690A true CN106583690A (en) | 2017-04-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604230A (en) * | 2017-08-24 | 2018-01-19 | 西安理工大学 | A kind of method for preparing CuW alloys using CuTi alloy infiltrations |
| CN108149043A (en) * | 2017-12-27 | 2018-06-12 | 西安理工大学 | A kind of method added ceramic phase titanium diboride and prepare CuW alloys |
| CN114932222A (en) * | 2022-06-17 | 2022-08-23 | 合肥工业大学智能制造技术研究院 | Method for improving density of tungsten-copper alloy |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509093A (en) * | 2009-03-23 | 2009-08-19 | 西安理工大学 | Process for producing millimeter and submillimeter level CuW70Cr/Ti sheet alloy |
| CN101515512B (en) * | 2009-03-30 | 2011-07-06 | 西安理工大学 | Method for preparing CuW/Y*O* multi-phase contact material |
| CN101515513B (en) * | 2009-03-30 | 2011-02-02 | 西安理工大学 | Method for preparing TiC/CuW alloy contact material |
| CN101928866B (en) * | 2010-03-23 | 2012-09-05 | 西安理工大学 | W-Cu composite material prepared from La-Ni intensified-sintered W skeleton and preparation method thereof |
| CN102312146B (en) * | 2011-08-05 | 2013-07-03 | 西安理工大学 | Preparation method of CuW70 contact material |
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2016
- 2016-11-24 CN CN201611043930.0A patent/CN106583690B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604230A (en) * | 2017-08-24 | 2018-01-19 | 西安理工大学 | A kind of method for preparing CuW alloys using CuTi alloy infiltrations |
| CN108149043A (en) * | 2017-12-27 | 2018-06-12 | 西安理工大学 | A kind of method added ceramic phase titanium diboride and prepare CuW alloys |
| CN114932222A (en) * | 2022-06-17 | 2022-08-23 | 合肥工业大学智能制造技术研究院 | Method for improving density of tungsten-copper alloy |
| CN114932222B (en) * | 2022-06-17 | 2023-11-07 | 合肥工业大学智能制造技术研究院 | Method for improving density of tungsten-copper alloy |
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