CN104759622B - A kind of preparation method of CuWC-CuCr integral contact - Google Patents
A kind of preparation method of CuWC-CuCr integral contact Download PDFInfo
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Abstract
The invention discloses the preparation method of a kind of CuWC CuCr integral contact, belong to technical field of composite materials, by wax spray after WC powder and copper-cobalt alloy powder wet mixing, pre-molding, in high-temperature atmosphere sintering furnace, green compact are sintered subsequently, obtain WC skeleton；Then in high-temperature atmosphere sintering furnace, carry out oozing copper i.e. obtain CuWC alloy；Finally using CuWC alloy, get rid of CuCo alloy that band method obtains as intermediate layer and CuCr alloy according to order from bottom to top, be together positioned in graphite crucible and carry out welding, to obtain final product.The preparation method of CuWC CuCr integral contact of the present invention, by using WC to replace W and use to get rid of the CuCo alloy of band method acquisition as intermediate layer, the most both ensure that the contact end of integral contact has that good heat conduction, electric conductivity, arc resistant be ablative and high temperature abrasion resistance, in turn ensure that binding ability good between contact end and copper alloy conducting rod.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of CuWC-CuCr integral contact
Preparation method.
Background technology
Copper tungsten contact material has good resistance to electric arc erosion, resistance fusion welding and high connductivity, height because of it
The combination properties such as intensity are widely used in various chopper, vacuum load switch and transformator permutator
On, especially being most widely used of reliability higher copper tungsten/tungsten/copper-alloy integrated contact material.
Along with the increase constantly raising and cut-offfing capacity of high switching voltages grade, to contact material
The requirement of energy is the harshest, it is desirable to contact not only has high heat conductivility and electric conductivity, also wants
Ask contact material to have high arc resistant ablation property and good high temperature abrasion resistance, thus meet contact material
The use requirement of material high life.Copper tungsten/chromiumcopper integral contact that high-voltage switch contact manufacturer provides at present
In the high life type approval test of extra-high voltage Capacitor banks switch, all find that contact material erosion and wear is tight
Weight so that switch cannot normally folding.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of CuWC-CuCr integral contact, solve existing
There is contact material erosion and wear serious, cause the switch cannot the problem of normal folding.
The technical solution adopted in the present invention is, the preparation method of a kind of CuWC-CuCr integral contact,
Specifically implement according to following steps:
Step 1, by WC powder and copper-cobalt alloy powder mix homogeneously, will suppress after mixed powder wax spray
Become green compact, then green compact are put in graphite crucible and sinter, obtain WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, obtain CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, i.e. obtains CuWC-CuCr integral contact.
The feature of the present invention also resides in,
In step 1 WC powder and the mixing of copper-cobalt alloy powder be by WC powder that granularity is 4～6 μm and
Copper-cobalt alloy powder in drum mixer with the rotating speed wet mixing 4h of 200r/min.
Step 1 is pressed into green compact be by wax spray after powder pressure with 340MPa on hydraulic press enter
Row compacting.
In step 1, sintering is that firing rate with 15～25 DEG C/min is carried out in hydrogen atmosphere sintering furnace
Heating, when temperature reaches 1300～1500 DEG C, furnace cooling after insulation 30～90min.
Oozing copper in step 2 is in micro-computer controlled high temperature sintering furnace, with the heating speed of 15～25 DEG C/min
Degree heats, when temperature reaches 1080～1180 DEG C, and furnace cooling after insulation 30～90min.
In step 3, welding is logical hydrogen in micro-computer controlled high temperature sintering furnace, with 15～25 DEG C/min's
Firing rate heats, when temperature reaches 1100～1300 DEG C, cold with stove after insulation 30～90min
But.
The invention has the beneficial effects as follows that the preparation method of CuWC-CuCr integral contact of the present invention is passed through
Use WC replace W and use get rid of band method obtain CuCo alloy as intermediate layer, this
Sample both ensure that the contact end of integral contact have good heat conduction, electric conductivity, arc resistant ablative and
High temperature abrasion resistance, in turn ensure that binding ability good between contact end and copper alloy conducting rod, solves
Conventional CuW alloy supertension uses under environment, arc resistant ablation property and poor the asking of high temperature abrasion resistance
Topic, ensure that the bonding strength of CuWC alloy and CuCr alloy simultaneously, it is thus achieved that CuWC-CuCr
Integral contact meets the use requirement of supertension lower high life.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
The preparation method of CuWC-CuCr integral contact of the present invention, by WC powder and copper-cobalt alloy powder in
Drum mixer carries out wet mixing, by after mixed powder wax spray on hydraulic press pre-molding, exist subsequently
Green compact are sintered by high-temperature atmosphere sintering furnace, prepare WC skeleton；Then sinter at high-temperature atmosphere
Stove carries out ooze copper and i.e. obtains CuWC alloy；Finally by CuWC alloy, get rid of the CuCo that band method obtains
Alloy according to order from bottom to top, is together positioned over graphite as intermediate layer and CuCr alloy
In crucible, in micro-computer controlled high temperature sintering furnace, logical hydrogen carries out welding, i.e. obtains CuWC-CuCr whole
Body contact.
Specifically implement according to following steps:
Step 1, by WC powder that granularity is 4～6 μm and copper-cobalt alloy powder (wherein WC powder
Amount is for 99.2wt%, and the amount of copper-cobalt alloy powder is 0.8wt%) in drum mixer with 200r/min's
Rotating speed wet mixing 4h；By after mixed powder wax spray on hydraulic press pressure with 340MPa be pressed into green compact in advance,
Subsequently the green compact suppressed are put in graphite crucible, with 15～25 DEG C/min in hydrogen atmosphere sintering furnace
Firing rate heat, when temperature reaches 1300～1500 DEG C, insulation 30～90min after with
Stove cools down, and i.e. prepares WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, carry out with the firing rate of 15～25 DEG C/min
Heating, when temperature reaches 1080～1180 DEG C, furnace cooling after insulation 30～90min, i.e. prepare
CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, adds with the firing rate of 15～25 DEG C/min
Heat, when temperature reaches 1100～1300 DEG C, furnace cooling after insulation 30～90min, i.e. obtain
CuWC-CuCr integral contact.
Preparation method of the present invention, replaces W to prepare CuWC alloy with WC, and WC is to produce hard
The primary raw material of alloy, its hardness is close with diamond, and is the good conductor of electricity and heat, prepares with it
CuWC alloy relatively CuW alloy rigidity had and be greatly improved very much, and conductivity variations is less；
While ensureing contact material good heat conductive, electric conductivity, improve the arc resistant ablation of contact material
Performance and high temperature abrasion resistance, relative to tradition CuW contact, extend its service life；Use simultaneously
A small amount of guiding copper-cobalt alloy powder replaces cobalt as binding agent, gets final product activated sintering WC skeleton, may be guided again
Follow-up copper penetrates into.
Preparation method of the present invention, uses the CuCo alloy getting rid of the acquisition of band method as intermediate layer, CuWC
When alloy and CuCr alloy are directly connected to, owing to both performance differences are relatively big, its bond strength is relatively low,
And using CuCo alloy as intermediate layer, cobalt both can form a kind of hard alloy with WC, again may be used
Form alloy with tungsten and chromium, so make the bonding strength between CuWC alloy and CuCr alloy obtain
A certain degree of raising, it is ensured that the stability that integral contact uses.
Embodiment 1
Step 1, by WC powder that granularity is 4～6 μm and copper-cobalt alloy powder in drum mixer with
The rotating speed wet mixing 4h of 200r/min；By after mixed powder wax spray on hydraulic press with the pressure of 340MPa
Be pressed into green compact in advance, subsequently the green compact suppressed put in graphite crucible, in hydrogen atmosphere sintering furnace with
The firing rate of 15 DEG C/min heats, when temperature reaches 1300 DEG C, with stove after insulation 90min
Cooling, i.e. prepares WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, heat with the firing rate of 20 DEG C/min,
When temperature reaches 1100 DEG C, furnace cooling after insulation 60min, i.e. prepare CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, heats with the firing rate of 25 DEG C/min,
When temperature reaches 1300 DEG C, furnace cooling after insulation 60min, i.e. obtain CuWC-CuCr entirety and touch
Head.
Embodiment 2
Step 1, by WC powder that granularity is 4～6 μm and copper-cobalt alloy powder in drum mixer with
The rotating speed wet mixing 4h of 200r/min；By after mixed powder wax spray on hydraulic press with the pressure of 340MPa
Be pressed into green compact in advance, subsequently the green compact suppressed put in graphite crucible, in hydrogen atmosphere sintering furnace with
The firing rate of 20 DEG C/min heats, when temperature reaches 1400 DEG C, with stove after insulation 60min
Cooling, i.e. prepares WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, heat with the firing rate of 15 DEG C/min,
When temperature reaches 1080 DEG C, furnace cooling after insulation 90min, i.e. prepare CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, heats with the firing rate of 20 DEG C/min,
When temperature reaches 1100 DEG C, furnace cooling after insulation 90min, i.e. obtain CuWC-CuCr entirety and touch
Head.
Embodiment 3
Step 1, by WC powder that granularity is 4～6 μm and copper-cobalt alloy powder in drum mixer with
The rotating speed wet mixing 4h of 200r/min；By after mixed powder wax spray on hydraulic press with the pressure of 340MPa
Be pressed into green compact in advance, subsequently the green compact suppressed put in graphite crucible, in hydrogen atmosphere sintering furnace with
The firing rate of 25 DEG C/min heats, when temperature reaches 1500 DEG C, with stove after insulation 30min
Cooling, i.e. prepares WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, heat with the firing rate of 25 DEG C/min,
When temperature reaches 1180 DEG C, furnace cooling after insulation 30min, i.e. prepare CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, heats with the firing rate of 15 DEG C/min,
When temperature reaches 1200 DEG C, furnace cooling after insulation 30min, i.e. obtain CuWC-CuCr entirety and touch
Head.
WC skeleton embodiment 1 obtained is observed under a scanning electron microscope, it can be seen that
Substantial amounts of sintering neck is defined between WC particle；CuWC alloy is prepared as metallographic specimen, by sweeping
Retouch ultramicroscope it will be seen that WC particle is evenly distributed in Copper substrate；Hardness and electrical conductivity are surveyed
Test result shows, the hardness of CuWC alloy reaches about 300HB, far above conventional CuW alloy
Hardness (175HB), electrical conductivity is suitable with conventional CuW alloy, about about 45%IACS；To institute
Obtain the use requirement of CuWC-CuCr.
Claims (6)
1. the preparation method of a CuWC-CuCr integral contact, it is characterised in that specifically according to following
Step is implemented:
Step 1, by WC powder and copper-cobalt alloy powder mix homogeneously, will suppress after mixed powder wax spray
Become green compact, then green compact are put in graphite crucible and sinter, obtain WC skeleton；
Step 2, WC skeleton step 1 obtained and fine copper test block one are positioned over graphite crucible on next
In, carry out oozing copper in micro-computer controlled high temperature sintering furnace, obtain CuWC alloy；
Step 3, obtains step 2 CuWC alloy, gets rid of the CuCo alloy of band method acquisition as centre
Transition zone and CuCr alloy, according to order from bottom to top, are together positioned in graphite crucible, micro-
In the program control high temperature sintering furnace of machine, logical hydrogen carries out welding, i.e. obtains CuWC-CuCr integral contact.
The preparation method of CuWC-CuCr integral contact the most according to claim 1, its feature exists
In, in step 1 WC powder and the mixing of copper-cobalt alloy powder be by WC powder that granularity is 4～6 μm and
Copper-cobalt alloy powder in drum mixer with the rotating speed wet mixing 4h of 200r/min.
The preparation method of CuWC-CuCr integral contact the most according to claim 1, its feature exists
In, step 1 is pressed into green compact be by wax spray after powder pressure with 340MPa on hydraulic press enter
Row compacting.
4. according to the preparation method of the arbitrary described CuWC-CuCr integral contact of claims 1 to 3, its
Being characterised by, in step 1, sintering is the heating speed in hydrogen atmosphere sintering furnace with 15～25 DEG C/min
Degree heats, when temperature reaches 1300～1500 DEG C, and furnace cooling after insulation 30～90min.
The preparation method of CuWC-CuCr integral contact the most according to claim 1, its feature exists
In, oozing copper in step 2 is in micro-computer controlled high temperature sintering furnace, with the heating speed of 15～25 DEG C/min
Degree heats, when temperature reaches 1080～1180 DEG C, and furnace cooling after insulation 30～90min.
The preparation method of CuWC-CuCr integral contact the most according to claim 1, its feature exists
In, in step 3, welding is logical hydrogen in micro-computer controlled high temperature sintering furnace, with 15～25 DEG C/min's
Firing rate heats, when temperature reaches 1100～1300 DEG C, cold with stove after insulation 30～90min
But.
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| CN108080643B (en) * | 2017-12-14 | 2020-03-31 | 陈赛飞 | Preparation method of powder metallurgy wear-resistant lubricating block for railway high-voltage isolating switch contact |
| CN112658243B (en) * | 2020-11-21 | 2022-10-25 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuW/CuCr integral contact |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149362A (en) * | 1988-08-19 | 1992-09-22 | Kabushiki Kaisha Toshiba | Contact forming material for a vacuum interrupter |
| JP2001351451A (en) * | 2000-06-06 | 2001-12-21 | Toshiba Corp | Contact element material and contact element |
| JP2003155530A (en) * | 2001-11-16 | 2003-05-30 | Taiheiyo Cement Corp | Electric contact material |
| CN101707147A (en) * | 2009-12-08 | 2010-05-12 | 浙江省冶金研究院有限公司 | Cu WC/Cu composite material and preparation technology |
| CN102321816A (en) * | 2011-09-30 | 2012-01-18 | 西安理工大学 | Method for preparing CuWCr composite material through electric arc melting and infiltration method |
| CN102760597A (en) * | 2012-06-25 | 2012-10-31 | 西安理工大学 | Preparation method of CuW (Copper Tungsten) and CuCr (Copper Chromium) integrated material used for high voltage electric contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006120373A (en) * | 2004-10-20 | 2006-05-11 | Hitachi Ltd | Vacuum circuit breaker, vacuum bulb and electrode and its manufacturing method |
-
2015
- 2015-03-04 CN CN201510096414.3A patent/CN104759622B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149362A (en) * | 1988-08-19 | 1992-09-22 | Kabushiki Kaisha Toshiba | Contact forming material for a vacuum interrupter |
| JP2001351451A (en) * | 2000-06-06 | 2001-12-21 | Toshiba Corp | Contact element material and contact element |
| JP2003155530A (en) * | 2001-11-16 | 2003-05-30 | Taiheiyo Cement Corp | Electric contact material |
| CN101707147A (en) * | 2009-12-08 | 2010-05-12 | 浙江省冶金研究院有限公司 | Cu WC/Cu composite material and preparation technology |
| CN102321816A (en) * | 2011-09-30 | 2012-01-18 | 西安理工大学 | Method for preparing CuWCr composite material through electric arc melting and infiltration method |
| CN102760597A (en) * | 2012-06-25 | 2012-10-31 | 西安理工大学 | Preparation method of CuW (Copper Tungsten) and CuCr (Copper Chromium) integrated material used for high voltage electric contact |
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