CN106566937B - A method of improving CuW alloy rigidity - Google Patents
A method of improving CuW alloy rigidity Download PDFInfo
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- CN106566937B CN106566937B CN201610999637.5A CN201610999637A CN106566937B CN 106566937 B CN106566937 B CN 106566937B CN 201610999637 A CN201610999637 A CN 201610999637A CN 106566937 B CN106566937 B CN 106566937B
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- 239000000956 alloy Substances 0.000 title claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000010949 copper Substances 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000008595 infiltration Effects 0.000 claims abstract description 11
- 238000001764 infiltration Methods 0.000 claims abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000011812 mixed powder Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000007792 addition Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000000320 mechanical mixture Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000009700 powder processing Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C22C1/045—Alloys based on refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
Abstract
The invention discloses it is a kind of improve CuW alloy rigidity method, by WS2, tungsten powder and Cu powder mix after by binder-treatment, dry, sieve powder handle, obtain mixed-powder；Mixed-powder is suppressed to form blank by cold stamping die；Copper billet is placed on blank together in the high purity graphite crucible, is sintered under hydrogen shield atmosphere and infiltration, CuW alloy is obtained.The method of the present invention improves the preparation method of CuW alloy rigidity, and the addition of WS2 makes in alloy the W skeleton of formation well-formed improve the hardness of CuW alloy, and hardness reaches as high as 215HB, is higher by national standard 23%.
Description
Technical field
The invention belongs to powder metallurgic methods to prepare CuW alloy field, and in particular to a kind of side for improving CuW alloy rigidity
Method.
Background technique
CuW alloy be a kind of Cu by with satisfactory electrical conductivity, thermal conductivity and have high-intensitive, fusing point is high, high density and
The composite material of the function admirable of low-expansion W composition.Because the W of body-centered cubic structure and the Cu of face-centred cubic structure were both
Mutually solid solution can not form intermetallic compound, therefore this kind of composite material is commonly known as pseudo-alloy.CuW pseudo-alloy has both
The advantages of both Cu and W, currently, it is many to have been widely used for electric power, electronics, machinery, metallurgy, aerospace and military project etc.
Field.In numerous composite materials, CuW system contact material is because it is with good resistance to arc erosion, resistance fusion welding and height
Intensity and be widely used as contact material.CuW contact have decades research history, be commonly utilized in air or
In other media, later since vacuum switch electric appliance has many advantages, such as that small in size, pollution-free, performance is good and long service life, very
Empty device for switching obtains swift and violent development, becomes the leading device for switching of mesohigh power grid.
Business CuW alloy is not met by the electrical middle critical material performance such as high-grade transmission of electricity breaker, disconnecting switch and wants
It asks, especially in the case where frequently cut-offfing, therefore, improves its performance and the service life is the problem that scientific research personnel must solve.
Summary of the invention
The object of the present invention is to provide a kind of method for improving CuW alloy rigidity, this method keeps formation structure in alloy good
Good W skeleton improves the hardness of CuW alloy.
The technical scheme adopted by the invention is that a method of CuW alloy rigidity is improved, specifically includes the following steps:
Step 1, by WS2, tungsten powder and Cu powder mix after by binder-treatment, dry, sieve powder handle, obtain mixed-powder；
Step 2, mixed-powder step 1 obtained is suppressed to form blank by cold stamping die；
Step 3, copper billet is placed on the blank that step 2 is formed together in high purity graphite crucible, in hydrogen shield
It is sintered under atmosphere and infiltration, obtains CuW alloy.
The features of the present invention also characterized in that
The mass ratio of tungsten powder, copper powder and WS2 is 1000:50~80:3~12 in step 1.
WS2, tungsten powder and Cu powder are fitted into batch mixer in step 1, tungsten carbide milling balls are added by the 1:1 of total powder quality,
Powder 4h is mixed with the revolving speed of 120r/min.
The pressure suppressed in step 2 is 350~700KN, and the dwell time is 30~50s.
The temperature being sintered in step 3 is 900~1000 DEG C, time 2h.
The temperature of infiltration is 1300~1400 DEG C in step 3, time 2h.
The invention has the advantages that the method that the present invention improves CuW alloy rigidity, the addition of WS2 make to be formed in alloy
The W skeleton of well-formed improves the hardness of CuW alloy, and hardness reaches as high as 215HB, is higher by national standard 23%.
The hardness of the method that the present invention improves CuW alloy rigidity, the CuW alloy prepared under such scheme is improved, electricity
Conductance decreases, but conductivity still meets minimum national standard, and added WS2 has lubricity, the wear rate phase of alloy
To smaller.Dieletric strength improves and value reduction of shutting off, and is conducive to improve service life of the CuW alloy as high-voltage switch gear.
Detailed description of the invention
Fig. 1 is the CuW alloy structure figure for being not added with lubrication phase WS2；
Fig. 2 is the CuW alloy structure figure that lubrication phase WS2 is added in embodiment 2；
Fig. 3 is the CuW alloy rigidity curve for adding not same amount WS2.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The present invention improve CuW alloy rigidity method, by WS2, W powder and induction Cu powder mechanical mixture after by pre-stamped shape
At blank, blank and copper billet are sintered and infiltration in high purity graphite crucible under hydrogen shield atmosphere, obtain CuW conjunction
Gold.
Specific steps are as follows:
It step 1, is in mass ratio to be fitted into batch mixer to fill after 1000:50~80:3~12 is mixed by tungsten powder, copper powder and WS2
Enter in batch mixer, tungsten carbide milling balls are added by the 1:1 of total powder quality, powder 4h is mixed with the revolving speed of 120r/min；
Step 2, by after step 1 mechanical mixture powder carry out binder-treatment, dry, sieve powder (200 mesh screen) handle；
Step 3, the powder after step 2 sieving is suppressed by cold stamping die, 350~700KN of pressing pressure, pressure maintaining 30~
50s forms blank, controls blank height by gasket in pressing process and carries out infiltration copper to reserve quantitative gap；
Step 4, copper billet is placed on the blank of the pre-stamped formation of step 3 together in high purity graphite crucible, in hydrogen
In 900~1000 DEG C of sintering 2h under gas shielded atmosphere, then the infiltration 2h at 1300~1400 DEG C, obtains CuW alloy.
Since WS2 thermal stability is good, can be lubricated for a long time at 425 DEG C or less, and in vacuum decomposition temperature up to 1150 DEG C, and
Its compression strength reaches 21Mpa, and hardness is high, and addition can be improved the hardness of alloy in the alloy.WS2 chemical property is stablized,
1500 DEG C or less do not react with Cu and W.It is applicable not only to usual lubricating condition, and can be used for the work of many harshnesses
In environment, it can satisfy various exacting terms of the CuW alloy during the preparation process and in practical application.
Lamellar is presented in its crystal structure of WS2, aligns with a degree of, this configuration reduces its frictions
Coefficient, so the alloy of addition WS2 also has relatively low coefficient of friction.
The method that the present invention improves CuW alloy rigidity, the addition of WS2 improve the W skeleton that well-formed is formed in alloy
The hardness of CuW alloy, hardness reach as high as 215HB, are higher by national standard 23%.With this scheme prepare CuW alloy not only
Its lubricity is improved, while also maintaining good electrical breakdown performance, and dieletric strength is 3~4 × 107In range
It floats, and as shutting off for the increases CuW alloy of WS2 additive amount is worth lower and lower, this method is easy to operate, and strengthening effect is shown
It writes, it is environmentally protective.
Embodiment 1
It is in mass ratio to be fitted into batch mixer to be packed into mixing after 1000:50:3 is mixed by submicron order tungsten powder, copper powder and WS2
In machine, tungsten carbide milling balls are added by the 1:1 of total powder quality, powder 4h are mixed with the revolving speed of 120r/min, by the powder after mechanical mixture
End carries out binder-treatment, dries, sieves powder processing, and powder is suppressed by cold stamping die, pressing pressure 350KN, is formed within pressure maintaining 30 seconds
Blank, the blank of pre-stamped formation, by copper billet place blank on then under hydrogen shield atmosphere 900 DEG C of sintering 2h, 1320 DEG C
Infiltration 2h, the hardness of gained CuW alloy are 198HB, and conductivity 27MS/m, dieletric strength is 3.40 × 107V/M。
Embodiment 2
It is in mass ratio to be fitted into batch mixer to be packed into mixing after 1000:60:6 is mixed by submicron order tungsten powder, copper powder and WS2
In machine, tungsten carbide milling balls are added by the 1:1 of total powder quality, powder 4h are mixed with the revolving speed of 120r/min, by the powder after mechanical mixture
End carries out binder-treatment, dries, sieves powder processing, and powder is suppressed by cold stamping die, pressing pressure 400KN, is formed within pressure maintaining 35 seconds
Blank, the blank of pre-stamped formation, by copper billet place blank on then under hydrogen shield atmosphere 940 DEG C of sintering 2h, 1350 DEG C
Infiltration 2h, the hardness of gained CuW alloy are 218HB, and conductivity 25MS/m, dieletric strength is 3.20 × 107V/M。
Fig. 1 is free from the CuW alloy structure of lubrication phase WS2, wherein there is ball-type W50Particle and production two kinds of W powder of W particle；
Fig. 2 is the CuW alloy structure added with lubrication phase WS2 under the present embodiment, spherical W50Between particle and spherical shape W50
Sintering neck between particle and production W particle becomes more preferably, this is conducive to the raising of hardness, and spherical shape W50Surrounding is by many smaller
The production W particle of granularity wraps up, and forms and is wrapped in around ideal micron order ball-type powder by submicron order ball-type powder
Microstructure, and there are also the addition for lubricating phase WS2 particle, this is all conducive to the raising in frictional behaviour and service life；
Fig. 3 is that the present embodiment addition is more bent than the hardness of the lower CuW alloy added with lubrication phase WS2 with other additions than under
Line, hardness reduces afterwards as the increase of WS2 content first increases as can see from Figure 3, the hardness of the CuW alloy under the present embodiment
For 218HB.
Embodiment 3
It is in mass ratio to be fitted into batch mixer to be packed into mixing after 1000:70:9 is mixed by submicron order tungsten powder, copper powder and WS2
In machine, tungsten carbide milling balls are added by the 1:1 of total powder quality, powder 4h are mixed with the revolving speed of 120r/min, by the powder after mechanical mixture
End carries out binder-treatment, dries, sieves powder processing, and powder is suppressed by cold stamping die, pressing pressure 500KN, is formed within pressure maintaining 40 seconds
Blank, the blank of pre-stamped formation, by copper billet place blank on then under hydrogen shield atmosphere 960 DEG C of sintering 2h, 1300 DEG C
Infiltration 2h, the hardness of gained CuW alloy are 190HB, and conductivity 23.5MS/m, dieletric strength is 3.0 × 107V/M。
Embodiment 4
It is in mass ratio to be fitted into be packed into batch mixer after 1000:80:12 is mixed to mix by submicron order tungsten powder, copper powder and WS2
In material machine, tungsten carbide milling balls are added by the 1:1 of total powder quality, powder 4h are mixed with the revolving speed of 120r/min, after mechanical mixture
Powder carries out binder-treatment, dries, sieves powder processing, and powder is suppressed by cold stamping die, pressing pressure 600KN, 50 seconds shapes of pressure maintaining
At blank, the blank of pre-stamped formation, by copper billet place blank on then under hydrogen shield atmosphere 1000 DEG C of sintering 2h, 1400
DEG C infiltration 2h, the hardness of gained CuW alloy are 178HB, and conductivity 23MS/m, dieletric strength is 3.87 × 107V/M。
Claims (5)
1. a kind of method for improving CuW alloy rigidity, which is characterized in that specifically includes the following steps:
Step 1, by WS2, tungsten powder and Cu powder mixing after by binder-treatment, dry, sieve powder handle, obtain mixed-powder；
Tungsten powder, copper powder and WS2Mass ratio be 1000:50~80:3~12；
Step 2, mixed-powder step 1 obtained is suppressed to form blank by cold stamping die；
Step 3, copper billet is placed on the blank that step 2 is formed together in high purity graphite crucible, in hydrogen shield atmosphere
Under be sintered and infiltration, obtain CuW alloy.
2. the method according to claim 1 for improving CuW alloy rigidity, which is characterized in that step 1 is by WS2, tungsten powder and Cu
Powder is fitted into batch mixer, and tungsten carbide milling balls are added by the 1:1 of total powder quality, mix powder 4h with the revolving speed of 120r/min.
3. the method according to claim 1 for improving CuW alloy rigidity, which is characterized in that the pressure suppressed in step 2 is
350~700KN, dwell time are 30~50s.
4. the method according to claim 1 for improving CuW alloy rigidity, which is characterized in that sintering temperature is in step 3
900~1000 DEG C, time 2h.
5. the method according to claim 1 or 4 for improving CuW alloy rigidity, which is characterized in that infiltrating temperature in step 3
It is 1300~1400 DEG C, time 2h.
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| CN201610999637.5A CN106566937B (en) | 2016-11-14 | 2016-11-14 | A method of improving CuW alloy rigidity |
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| CN201610999637.5A CN106566937B (en) | 2016-11-14 | 2016-11-14 | A method of improving CuW alloy rigidity |
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| CN112059175B (en) * | 2020-08-12 | 2023-04-25 | 西安理工大学 | Preparation method of WC reinforced WCu double-gradient structure composite material |
| CN113278836B (en) * | 2021-04-23 | 2022-04-08 | 西安理工大学 | Method for preparing CuW/low-carbon steel heterogeneous bimetallic material |
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| CN101515513B (en) * | 2009-03-30 | 2011-02-02 | 西安理工大学 | Method for preparing TiC/CuW alloy contact material |
| CN102312146B (en) * | 2011-08-05 | 2013-07-03 | 西安理工大学 | Preparation method of CuW70 contact material |
| CN102703791A (en) * | 2012-05-14 | 2012-10-03 | 无锡润鹏复合新材料有限公司 | High-temperature wear-resistant self-lubrication composite material added with WS2 and preparation method of composite material |
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Effective date of registration: 20211126 Address after: 314500 Tongxiang, Jiaxing, Zhejiang, Wutong Street East Road (East) 55, Tongxiang chamber of Commerce Building 1 unit 1702, 1703 room -D-405 Patentee after: Jiaxing Ruyun Construction Technology Co.,Ltd. Address before: Room 10602, unit 1, building 1, Wangjing international building, Fengcheng Sixth Road, Xi'an Economic and Technological Development Zone, Shaanxi 710000 Patentee before: SHAANXI ZHUANYI INTELLECTUAL PROPERTY OPERATION CO.,LTD. |
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Effective date of registration: 20231121 Address after: 226500 Nanling Neighborhood Committee, Dongchen Town, Rugao City, Nantong City, Jiangsu Province (No. 1 Lingxi Road)+ Patentee after: Nantong YunFu Copper and Aluminum Products Co.,Ltd. Address before: 314500 Tongxiang, Jiaxing, Zhejiang, Wutong Street East Road (East) 55, Tongxiang chamber of Commerce Building 1 unit 1702, 1703 room -D-405 Patentee before: Jiaxing Ruyun Construction Technology Co.,Ltd. |
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