CN1473679A - Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold - Google Patents
Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold Download PDFInfo
- Publication number
- CN1473679A CN1473679A CNA031344798A CN03134479A CN1473679A CN 1473679 A CN1473679 A CN 1473679A CN A031344798 A CNA031344798 A CN A031344798A CN 03134479 A CN03134479 A CN 03134479A CN 1473679 A CN1473679 A CN 1473679A
- Authority
- CN
- China
- Prior art keywords
- chromium
- contact material
- copper
- casting
- alloy liquid
- 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
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The production process of copper-chromium contact material includes smelting copper and chromium in vacuum induction furnace to form alloy liquid; casting the alloy liquid into single-sided water cooled mold with the casting speed is so controlled that an alloy liquid height of 3-45 mm is always maintained over the ingot, and directional solidification under certain temperature gradient in the solidification area and balanced poured alloy liquid and the solidified alloy liquid. By means of using the production process and mold, compact and homogeneous contact material with chromium content 3-45 % and fine structure is produced. The present invention has high finished product rate, high reliability of the contact material and no obvious casting shrinkage cavity.
Description
Technical field
The present invention relates to the electrical material field, particularly a kind of vacuum oriented method and monolateral junker mold of making the vacuum circuit breaker copper-chromium contact material that solidify.
Background technology
Contact is the core component of vacuum circuit breaker, the copper chromium contact alloy is a most frequently used contact material during present vacuum circuit breaker is made, in the prior art there be the manufacture method of contact material: powder metallurgic method, vacuum-sintering infiltration method, consumable electrode melting method and vacuum melting method for quick cooling, all there is significant disadvantages in said method.
Powder metallurgic method is copper powder and chromium powder to be mixed through pressure forming, monolithic vacuum-sintering make, and shortcoming is the gas content height, and compactness extent is low.The vacuum-sintering infiltration method is to sinter copper powder into stephanoporate framework, reusable liquid copper carries out infiltration, the advantage of infiltration method is that equipment investment is few, the gas content of the copper chromium contact of producing and density and some electrical property obviously are better than the contact that powder mixing method is produced, its shortcoming is that the production cycle is long, higher because of the percent defective that the infiltration defective produces, crystal grain is thick.The consumable electrode melting method is earlier copper powder and chromium powder to be mixed, consutrode is formed in pre-burning, again the consutrode remelting is become copper chromium ingot casting, the major advantage of this method is that organizing of the copper chromium contact produced is tiny, density height, its shortcoming are that equipment investment is big, complex manufacturing, easily produce the chromium segregation, particularly gas content height of macroscopic view during crystallization.The vacuum melting method for quick cooling is a kind of copper-chromium contact material manufacture method of developing in recent years, this method is earlier copper and chromium at high temperature to be smelted into the alloying liquid phase, inject the mold rapid crystallization then and be solidified into ingot casting, its shortcoming is in actual production, because cooling velocity is very fast, material forms shrinkage cavity easily, and when cooling rate is low, the gravity segregation of copper and chromium and thick chromium dendrite then occur.Thereby above-mentioned shortcoming all can exert an influence to the tissue of contact material and reduce the reliability that contacts for vacuum-break switches uses.
Summary of the invention
The objective of the invention is provides a kind of vacuum oriented method and monolateral junker mold that solidifies the manufactured copper chromium contact material at above-mentioned the deficiencies in the prior art, to reach the purpose of improving vacuum copper-chromium contact material tissue and performance.
For realizing purpose of the present invention, the invention provides a kind of vacuum oriented method and monolateral junker mold that solidifies the manufactured copper chromium contact material, this method is earlier copper and chromium that contains the 3%-45% part by weight and interpolation alloy to be fused into alloy liquid phase in vaccum sensitive stove, ratio according to chromium content, make the temperature of alloy liquid phase remain on 1150-1500 ℃ of scope, and inject a monolateral junker mold that below cavity body of mould, is provided with water flowing cooling base, in casting cycle, the control casting rate makes liquid remain at the 3mm-40mm height, because the monolateral water-cooling structure form of mold, make that the direction of solidifying is certain, the injecting height of control alloy liquid in casting cycle, make solidification zone form certain thermograde and cool off, inject the speed of liquid and the alloy liquid setting rate in the mold reaches balance and directional solidification goes out copper-chromium contact material.
Description of drawings
Accompanying drawing 1 is the structure chart of monolateral junker mold
The specific embodiment
The present invention is described in further detail below in conjunction with experimental result and accompanying drawing.
Realizing vacuum oriented solidifying in the casting cycle of making the breaker copper-chromium contact material, reaching step by the following method and carry out:
1), with copper with contain the chromium of 3%-45% part by weight and add alloy and at high temperature be fused into alloy liquid phase;
2), according to the ratio of chromium content, make the temperature of alloy liquid phase remain on 1150-1500 ℃ of scope, and inject cavity body of mould 1 with monolateral water-cooling structure mold;
3), in casting cycle, water flowing cooling base 2 carries out the water flowing cooling because the position of delivery port 4 is than the position height of water inlet 3, full all the time cold water keeps the circulation cooling in the cooling base 2.
4), in casting cycle, the alloy liquid that enters in the cavity body of mould 1 begins to solidify from bottom to top under cooling effect, along with solidifying of liquid, all the time the top that is controlled at ingot casting in the casting keeps the liquid of 3mm-45 mm height, make the injection rate of alloy liquid and the setting rate of ingot casting reach balance, make solidifying evenly of ingot casting.
Casting rate makes liquid height remain to solidify the 3mm-40mm above the ingot casting along with setting rate is controlled in experiment, when especially casting rate being controlled at the 5mm-20mm that liquid height is remained on solidify the ingot casting top, the directed smelting of thermograde that alloy liquid is pressed 50-300 ℃/mm but, smelting but under this thermograde, can make alloy liquid keep certain setting rate, the segregation on a large scale of chromium can not appear, simultaneously because the liquid of keeping certain height in the top of ingot casting carries out liquid replenishes and shrinkage cavity can not occur, the crystallization microscopic structure of ingot casting is more evenly tiny.
Fig. 1 is for realizing that vacuum oriented clotting method prepares the designed monolateral junker mold of breaker copper-chromium contact material.Directional solidification is watered mold and is designed to monolateral water-cooling structure, design has water flowing cooling base 2 below cavity body of mould 1, the position of the delivery port 4 of water flowing cooling base 2 to guarantee the full all the time cooling water of base, makes the direction heat radiation of alloy liquid to water flowing cooling base 2 than the position height of water inlet 3.Cavity body of mould 1 adopts pottery or graphite heat-barrier material, can select the cavity body of mould of suitable internal diameter according to required contact blade diameter, in casting cycle, be controlled at ingot casting above remain the liquid of 3mm-45mm height, the continuous supplementation when guaranteeing to ingot solidification.
Adopt method of the present invention and mould manufactured copper chromium contact material, in when casting because casting rate and cooling velocity consistent and the liquid that above ingot casting, remains certain altitude, the shortcoming that the too fast material of cooling velocity forms shrinkage cavity easily can not appear, the phenomenon that copper chromium gravity segregation and thick chromium dendrite also can when cooling velocity is low, not occur, the content ratio of chromium is 3%-45%, organize tiny, the chromium uniform particles, material compactness height, improved the proof voltage intensity of countact material for vacuum circuit breakers effectively, performances such as breaking capacity and anti-ablation, thereby the reliability of raising vacuum circuit breaker.Adopt monolateral junker mold, simple in structure, easy to implement, and the yield rate height.
Claims (4)
1, a kind of vacuum oriented method of making the breaker copper-chromium contact material of solidifying at high temperature is fused into alloy liquid phase with copper and chromium that contains the 3%-45% part by weight and interpolation alloy, and its feature is further comprising the steps of:
1), alloy liquid phase is injected the casting die mould cavity [1] with monolateral water-cooling structure;
2), in casting cycle, casting rate be controlled at make liquid height remain at 3mm-40mm.
2, the vacuum oriented method of making the breaker copper-chromium contact material of solidifying according to claim 1 is characterized in that: in casting cycle casting rate is controlled at and makes liquid height remain on 5mm-20mm.
3, a kind of monolateral junker mold of realizing vacuum oriented clotting method manufacturing breaker copper-chromium contact material, partly form by cavity body of mould [1] and water-cooled, water-cooled partly is arranged on the circumference of cavity body of mould [1], it is characterized in that: be provided with water flowing cooling base [2] in the below of cavity body of mould [1], cavity body of mould [1] is a heat-barrier material.
4, vacuum oriented clotting method according to claim 3 is made the monolateral junker mold of breaker copper-chromium contact material, it is characterized in that the heat-barrier material that cavity body of mould [1] adopts is pottery or graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134479 CN1209213C (en) | 2003-08-11 | 2003-08-11 | Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134479 CN1209213C (en) | 2003-08-11 | 2003-08-11 | Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1473679A true CN1473679A (en) | 2004-02-11 |
| CN1209213C CN1209213C (en) | 2005-07-06 |
Family
ID=34154503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134479 Expired - Fee Related CN1209213C (en) | 2003-08-11 | 2003-08-11 | Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1209213C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928461A (en) * | 2012-10-26 | 2013-02-13 | 中冶南方工程技术有限公司 | Experiment device for detecting heat exchange coefficient of water cooling mould |
| CN106825459A (en) * | 2016-12-29 | 2017-06-13 | 西安交通大学青岛研究院 | A kind of vacuum casting device of TiAl intermetallic compound ingot |
| CN110592417A (en) * | 2019-09-27 | 2019-12-20 | 昆明贵金属研究所 | High-flux preparation method of sliding electric contact material with gradient distribution of components |
-
2003
- 2003-08-11 CN CN 03134479 patent/CN1209213C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928461A (en) * | 2012-10-26 | 2013-02-13 | 中冶南方工程技术有限公司 | Experiment device for detecting heat exchange coefficient of water cooling mould |
| CN102928461B (en) * | 2012-10-26 | 2015-11-11 | 中冶南方工程技术有限公司 | For measuring the experimental provision of the junker mold coefficient of heat transfer |
| CN106825459A (en) * | 2016-12-29 | 2017-06-13 | 西安交通大学青岛研究院 | A kind of vacuum casting device of TiAl intermetallic compound ingot |
| CN110592417A (en) * | 2019-09-27 | 2019-12-20 | 昆明贵金属研究所 | High-flux preparation method of sliding electric contact material with gradient distribution of components |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1209213C (en) | 2005-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2808362Y (en) | Equipment for manufacturing oriental-congealing casting pieces | |
| CN105132705B (en) | The method and device of vacuum magnetic control electric arc remelting refining metal | |
| CN103691912B (en) | Gold base alloy casting blank melting and casting integrated device and utilization method thereof | |
| CN104264016B (en) | A kind of alusil alloy material and preparation method thereof | |
| CN110453106A (en) | It is a kind of it is antivacuum under draw the production technology of continuous casting copper-iron alloy slab ingot | |
| CN110144472B (en) | Vacuum induction melting method of manganese-copper vibration-damping alloy | |
| CN102380588B (en) | Intermediate-frequency induction and directional solidification ingot casting process and equipment utilizing same | |
| CN110814305B (en) | Cu-Fe composite material double-melt mixed casting equipment and process | |
| CN101748282A (en) | Electric slag liquid pouring method | |
| CN103008623A (en) | Method for refining crystal grains by utilizing strong magnetic field and special metal solidification casting device thereof | |
| CN1323782C (en) | Method of preparing semi solid state moltem metal/blank by ultrasonic treatment to control solidification and its device | |
| CN104846219B (en) | A kind of preparation facilitiess of metal semisolid blank and preparation method thereof | |
| CN102901659B (en) | Preparation method for metal alloy test rod | |
| CN1209213C (en) | Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold | |
| CN101787453A (en) | Vacuum circuit-breaking switch contact material preparation method | |
| KR20080036624A (en) | Process for producing metal-containing castings, and associated apparatus | |
| CN108517433A (en) | A kind of solidification preparation method of Cu-Cr contact alloys | |
| CN108889915B (en) | Method for preparing ingot casting by layer pouring based on slag protection | |
| CN212335263U (en) | Electron beam induced layer condensation device for preparing high-temperature alloy difficult to deform | |
| CN110369682B (en) | Device and method for preparing large ingot based on slag protection multilayer pouring magnetic field current composite treatment | |
| CN204035524U (en) | A kind of device preparing high purity copper and copper alloy casting ingot | |
| CN114178499A (en) | Continuous preparation method and device for homogeneous immiscible alloy material | |
| CN105400974A (en) | Low-segregation fine crystalline preparation process of high-temperature mother alloy | |
| CN109290537A (en) | A kind of production method of pure iron as raw material small billet | |
| CN2513700Y (en) | Columnar copper-chromium alloy directional crystal casting mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shaanxi Sirui Industries Co., Ltd. Assignor: Xi'an Jiaotong University Contract record no.: 2011610000139 Denomination of invention: Method for producing copper-chromium contact material by vacuum directional solidification and single side water cooling cast mold Granted publication date: 20050706 License type: Exclusive License Open date: 20040211 Record date: 20110726 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050706 Termination date: 20110811 |