CN1121454A - Dispersion-strengthened copper electrode for upset welding - Google Patents
Dispersion-strengthened copper electrode for upset welding Download PDFInfo
- Publication number
- CN1121454A CN1121454A CN 94112582 CN94112582A CN1121454A CN 1121454 A CN1121454 A CN 1121454A CN 94112582 CN94112582 CN 94112582 CN 94112582 A CN94112582 A CN 94112582A CN 1121454 A CN1121454 A CN 1121454A
- Authority
- CN
- China
- Prior art keywords
- powder
- dispersion
- copper electrode
- strengthened copper
- upset welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 title claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 15
- 239000010949 copper Substances 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000000498 ball milling Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000005275 alloying Methods 0.000 claims abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 3
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 235000012054 meals Nutrition 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001192 hot extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000713 high-energy ball milling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
A kind of dispersion-strengthened copper resistance welding electrode head is made by powder metallurgy method, whose characteristic lies in that the used powder material must have following features: (1) selecting pure copper powderwith 5-100 micrometers of grain size and ceramic powder with 0.5-2 micrometers of grain size, if using metallic oxide or carbife as raw material, the amount of ceramic powder is 0.5-3 Wt%; (2) mechanically ball-milling the powder raw material to make it be alloying, the ball and stock ratio is 1:3-10, the revolution of ball-milling machine is 500-800 n/min, the time is 2-20 hr. Advantages: high conductivity, high softening temp, uniform quality of material.
Description
The present invention relates to resistance welding electrode, a kind of dispersion-strengthened copper electrode for upset welding material is provided especially.
The resistance welding electrode head is a kind of conductive material of high flow rate, is widely used in the welding process of body of a motor car.It should have good electrical conductivity and high softening temperature.The alloy of elements such as copper that the electrode tip great majority employing melting of present most of factories practical application is produced and chromium, zirconium, nickel.These alloy raw materials cost an arm and a leg; and its adopts is that the principle of alloy strengthening makes material obtain high rigidity under the room temperature, and under higher temperature, its invigoration effect fades away; the softening temperature of material is only about 450 ℃; so head very fast distortion under the high temperature action that welding produces makes head can not keep the type shape that designs, thereby influences welding quality when using; the life-span of this soldering tip is shorter; about about 20,000 times,, can not overcome this shortcoming fully though adopting the water-cooled protection.Also there is in the recent period the technology that adopts internal oxidation to make oxide dispersion intensifying copper product electrogenesis in next life welding resistance electrode tip to come out.This material softening temperature improves greatly than melting material, thus service life significant prolongation, but its manufacturing process complexity is difficult for large-scale industrial production.It also has the shortcoming of dispersoid particle skewness in addition, thereby the welding head quality instability of producing.
The object of the present invention is to provide a kind of conductance height, the softening temperature height, material is even, is easy to big industrial resistance welding electrode.
The invention provides a kind of dispersion-strengthened copper electrode for upset welding head, make by powder metallurgy method, it is characterized in that used powder: (1) selects granularity for use is the pure copper powder of 5～100 μ m, and ceramic powder such as metal oxide or the carbide of granularity between 0.5～2 μ m made raw material, the amount of ceramic powders is 0.5～3wt%:(2) with raw meal mechanical ball milling alloying, ratio of grinding media to material is 1: 3～10, and the ball mill revolution is 500～800n/min, and the time 2～20 is little right.The present invention comes down to adopt the method for high-energy ball milling, and the pure copper powder of anticipating and pure ceramic powder are carried out ball milling with dry method or wet method.The principle that pottery is selected is the hardness height, and at high temperature chemical property is stable, not with matrix copper generation chemical reaction.Ceramic powder content is between 0.5～3wt%, if content is lower than 0.5wt%, then strengthening effect is not obvious, if content surpasses 3%, then can reduce the electric conductivity of material, and material is become fragile.Mixed powder behind ball milling vapour pressure in cold stamping die is become green compact, and vapour pressure pressure is at 3～7 tons/centimetre
2Between.The vapour pressure green compact are squeezed into bar through hot extrusion technique, and extrusion temperature is between 750 ℃～850 ℃.With this material forge hot or be machined into the spot-wedling electrode head.The kind electrode material has the conductance height, the softening temperature height, and advantage such as elevated temperature strength is good, the electrode life of manufacturing is long, and the spot-welded on quality is good.The present invention has not only reduced the consumption of precious materials such as copper, chromium, nickel, and is easy to control product quality in large-scale industrial production.Below by embodiment in detail the present invention is described in detail.
Embodiment
To granularity is that 10～50 μ m copper powders were handled 4 hours with hydrogen reducing, and treated copper powder and pure zirconia aluminium powder (granularity 0.7～1 μ m) are carried out premixed, carries out ball milling then 10 hours, alumina content is 0.5%, 1%, 1.5%, 2.0% and 2.5%, totally five groups.Powder after grinding is cold-pressed into garden cylindricality green compact in cold stamping die, the pressure of colding pressing is 6 tons/centimetre
2, Cylinder diameter 7cm, high about 15cm carries out copper-clad to the Cylinder surface and handles, and carries out hot extrusion then, and extrusion temperature is 820 ℃, the diameter of rod 10mm that is squeezed into.The conductance of made material is more than 75% of fine copper, and softening temperature is 800 ℃.Five groups of materials all are processed into the spot-wedling electrode head,, wherein can finish solder joint 3.5 ten thousand times for one of longest-lived group in the enterprising spot welding experiment of industrial production line.
Claims (3)
1. a dispersion-strengthened copper electrode for upset welding head is made by powder metallurgy method, it is characterized in that used powder:
(1) selecting granularity for use is the pure copper powder of 5～100 μ m, and ceramic powder such as metal oxide or the carbide of granularity between 0.5～2 μ m make raw material, and the amount of ceramic powders is 0.5～3wt%;
(2) with raw meal mechanical ball milling alloying, ratio of grinding media to material is 1: 3～10, and the ball mill revolution is 500～800n/min, 2～20 hours time.
2. by the described dispersion-strengthened copper electrode for upset welding head of claim 1, it is characterized in that: used ceramic powder is Al
2O
3
3. by claim 1,2 described dispersion-strengthened copper electrode for upset welding heads is characterized in that: described powder metallurgical technique is, with powder at 3～17 tons/centimetre
2Be cold-pressed into green compact under the pressure, be hot extruded into bar through 750 ℃～850 ℃ again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112582A CN1042807C (en) | 1994-10-26 | 1994-10-26 | Dispersion-strengthened copper electrode for upset welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112582A CN1042807C (en) | 1994-10-26 | 1994-10-26 | Dispersion-strengthened copper electrode for upset welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1121454A true CN1121454A (en) | 1996-05-01 |
| CN1042807C CN1042807C (en) | 1999-04-07 |
Family
ID=5036254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94112582A Expired - Fee Related CN1042807C (en) | 1994-10-26 | 1994-10-26 | Dispersion-strengthened copper electrode for upset welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042807C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417736C (en) * | 2006-10-20 | 2008-09-10 | 西安理工大学 | Method for preparing alumina dispersion-strenghtened copper-base composite material |
| WO2009055404A2 (en) * | 2007-10-25 | 2009-04-30 | Contacts, Metals And Welding Inc. | Dispersion-strengthened copper resistance spot welding electrode |
| CN101823152A (en) * | 2010-04-14 | 2010-09-08 | 北京科技大学 | Method for preparing aluminum oxide dispersion strengthened iron pre-alloyed powder by using high-energy ball milling |
| CN102699573A (en) * | 2012-06-21 | 2012-10-03 | 哈尔滨工业大学 | High temperature brazing filler metal for brazing non-oxide ceramic and composite material as well as preparation method of high temperature brazing filler metal |
| CN105215566A (en) * | 2015-09-14 | 2016-01-06 | 泰州市华诚钨钼制品有限公司 | A kind of electrode tungsten copper rod |
| CN109722561A (en) * | 2019-01-21 | 2019-05-07 | 中南大学 | High-performance Cu-Cr alloy and preparation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747223B2 (en) * | 1987-09-22 | 1995-05-24 | トヨタ自動車株式会社 | Electrode tip for resistance welding |
| JPH0196306A (en) * | 1987-10-07 | 1989-04-14 | Sumitomo Light Metal Ind Ltd | Production of electrode material for resistance welding |
-
1994
- 1994-10-26 CN CN94112582A patent/CN1042807C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417736C (en) * | 2006-10-20 | 2008-09-10 | 西安理工大学 | Method for preparing alumina dispersion-strenghtened copper-base composite material |
| WO2009055404A2 (en) * | 2007-10-25 | 2009-04-30 | Contacts, Metals And Welding Inc. | Dispersion-strengthened copper resistance spot welding electrode |
| WO2009055404A3 (en) * | 2007-10-25 | 2009-08-13 | Contacts Metals & Welding | Dispersion-strengthened copper resistance spot welding electrode |
| CN101823152A (en) * | 2010-04-14 | 2010-09-08 | 北京科技大学 | Method for preparing aluminum oxide dispersion strengthened iron pre-alloyed powder by using high-energy ball milling |
| CN102699573A (en) * | 2012-06-21 | 2012-10-03 | 哈尔滨工业大学 | High temperature brazing filler metal for brazing non-oxide ceramic and composite material as well as preparation method of high temperature brazing filler metal |
| CN105215566A (en) * | 2015-09-14 | 2016-01-06 | 泰州市华诚钨钼制品有限公司 | A kind of electrode tungsten copper rod |
| CN109722561A (en) * | 2019-01-21 | 2019-05-07 | 中南大学 | High-performance Cu-Cr alloy and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042807C (en) | 1999-04-07 |
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