CN1159465C - Silver-chromium based electrical contact material and its production process - Google Patents
Silver-chromium based electrical contact material and its production process Download PDFInfo
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- CN1159465C CN1159465C CNB021383995A CN02138399A CN1159465C CN 1159465 C CN1159465 C CN 1159465C CN B021383995 A CNB021383995 A CN B021383995A CN 02138399 A CN02138399 A CN 02138399A CN 1159465 C CN1159465 C CN 1159465C
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Abstract
The present invention relates to electric contact material based on silver and chromium and a production technology thereof. The electric contact material is mainly used for manufacturing bimetal compound rivet contacts, and is form by the way that a silver substrate contains chromium; the ratio of the chromium to the silver in the material are respectively 0.5 to 20.5% and 79.5 to 99.5%, and the material also contains at least one kind or a plurality of kinds of zinc, tungsten, copper, vanadium and nickel which accounts for 0.1 to 1.5% of the total weight of the material. The technological method comprises: at least one kind or a plurality of kinds of silver ingot, the chromium, the zinc, the tungsten, the copper, the vanadium and the nickel is put in a smelting furnace for smelting and ingot casting, or silver powder, chromium powder, zinc powder, tungsten powder, copper powder, vanadium powder and nickel powder are mixed for ingot extrusion, are sintered at a high temperature and are cooled; the power is extruded into strips at the high temperature, and electric contact wires can be obtained by drawing. The electric contact material has the advantages of favorable processing performance, little mould consumption and reliable use.
Description
Technical field:
The present invention relates to a kind of contact material and production technique thereof based on silver-chromium.It is mainly used in makes bimetal composite rivet contact.Be widely used in high power relay.
Background technology:
Along with the develop rapidly of automobile, aircraft industry, the consequent is more and more higher to the requirement of automobile, high power relay that aircraft made.The contact material of rly. often adopts Ag-Ni alloy, Ag-SuO alloy, Pd-Cu alloy etc.The Ag-Ni alloy is widely used owing to its manufacturing process maturation.But this material only is applicable to the rly. that requirement is lower, can not satisfy the requirement of the rly. that reliability is higher, carrying capacity is big.The Ag-SuO alloy, it has satisfied the requirement of most of rly.s to contact material, but its materials processing becomes in the process of contact moment hardness hard, easily splits, thereby poor processability, the consumption mould is many, and every mould can only be processed several thousand contacts, contact production cost height.And the contact resistance instability, work reliability is poor.Often adopt the Pd-Cu alloy with being contact material to the high rly. of reliability requirement, but this material is very expensive, about 40,000 yuan of per kilograms.Therefore, how developing the new contact material that processing characteristics is good, cost is low, reliability is good again, is rly. industry questions of common interest.
Summary of the invention:
The object of the present invention is to provide a kind of processing characteristics is good, cost is low, reliability is high again new contact material and production technique thereof.
Technology contents of the present invention is: a kind of contact material based on silver-chromium, and it is to contain chromium in silver matrix, and the share of chromium is 0.5～20.5 weight percent in the material, and the share of silver is the 79.5-99.5 weight percent.
Also contain a kind of of the zinc, tungsten, copper, vanadium or the nickel that account for gross weight 0.1～1.5% or several in the material of the present invention.
Producing and manufacturing technique of the present invention is:
---a kind of of silver ingot, chromium and zinc, tungsten, copper, vanadium or nickel or several are placed smelting furnace melting and ingot casting; Or with silver powder, chromium powder and zinc, tungsten, copper, vanadium or nickel by powder mixing and briquetting, at high temperature sintering and cold working;
---at high temperature push slivering;
---can obtain silver-colored chromium through drawing and electrically contact wire rod.
The high temperature sintering of production technique of the present invention and the temperature of extruding are 800～960 ℃.Be preferably 840～900 ℃.Be preferably 860～880 ℃.
Compare with existing contact material, the present invention's chromatize in silver matrix is formed silver-chromium alloy material, and hardness is even in being processed into the process of contact, can not ftracture, thereby good processability, the consumption mould is few, and every mould can be processed a hundreds of thousands of contact, the contact production cost is low, contact resistance is stable, the work reliability height, and material price is low, its material is about 2000 yuan of per kilograms, is 1/20 of palladium-silver alloy contact material.
Description of drawings:
Fig. 1 is embodiments of the invention 1 technological process of production figure
Fig. 2 is embodiments of the invention 2 technological process of production figure.
Embodiment:
The present invention is a kind of contact material based on silver-chromium, and it is to contain chromium in silver matrix, and the share of chromium is 0.5～20.5 weight percent in the material, and the share of silver is the 79.5-99.5 weight percent.
Also contain a kind of of the zinc, tungsten, copper, vanadium or the nickel that account for gross weight 0.1～1.5% or several in the material of the present invention, and each components contents sum is 100% in this material.
Preferably contain a kind of of the zinc, tungsten, copper, vanadium or the nickel that account for gross weight 0.5～1% or several in the material of the present invention, and each components contents sum is 100% in this material.
The share of zinc is 0.1～0.5 weight percent in the material of the present invention.The share of tungsten is 0.1～0.3 weight percent.The share of copper is 0.1～0.8 weight percent.The share of vanadium is 0.1～0.5 weight percent.The share of nickel is 0.1～0.5 weight percent.And each components contents sum is 100% in this material.
Production technique of the present invention is:
Step 1, a kind of of silver ingot, chromium and zinc, tungsten, copper, vanadium or nickel or several are placed smelting furnace melting and ingot casting (Fig. 1); Or with silver powder, chromium powder and zinc, tungsten, copper, vanadium or nickel by powder mixing and briquetting, sintering and cold working at high temperature (Fig. 2);
Step 2, at high temperature push slivering;
Step 3, can obtain silver-colored chromium through drawing and electrically contact wire rod.
The high temperature sintering of production technique of the present invention and the temperature of extruding are 800～960 ℃.Be preferably 840～900 ℃.Be preferably 860～880 ℃.
Be several embodiments of the present invention below:
Example 1: take by weighing the 15Kg silver ingot, place medium-frequency induction furnace to melt, add 1Kg chromium subsequently, after homogenizing, billet and deepfreeze are cast in scarfing cinder, cut cast gate and remove surface impurity, billet of harvest type is at the web that is squeezed under 800～820 ℃ the high temperature about ￠ 6mm, through being drawn into the wire product of ￠ 1.3～5.0mm.
Example 2: take by weighing the 14.925Kg silver ingot, place medium-frequency induction furnace to melt, add 0.075Kg chromium subsequently, after homogenizing, billet and deepfreeze are cast in scarfing cinder, cut cast gate and remove surface impurity, billet of harvest type is at the web that is squeezed under 840～860 ℃ the high temperature about ￠ 6mm, through being drawn into the wire product of ￠ 1.3～5.0mm.
Example 3: take by weighing the 15.44Kg silver ingot, place medium-frequency induction furnace to melt, add 0.4Kg chromium, 0.016Kg zinc, 0.08Kg nickel, 0.064Kg copper subsequently successively, processing condition are with example 2.
Example 4: take by weighing the 15.34Kg silver ingot, place medium-frequency induction furnace to melt, add 0.5Kg chromium, 0.08Kg zinc, 0.016Kg nickel, 0.016Kg copper, 0.048Kg tungsten subsequently successively, processing condition are with example 2.
Example 5: take by weighing 14.82Kg silver powder, add the 1.16Kg chromium powder subsequently, place the V-mixer uniform mixing after, the briquetting moulding, under 860-880 ℃ of high temperature, carry out sintering and cold working, under 860-880 ℃ of high temperature, be squeezed into web then, through being drawn into the wire product of 1.3～5.0mm.
Example 6: take by weighing 15.5Kg silver powder, add the 0.56Kg chromium powder subsequently, place the V-mixer uniform mixing after, the briquetting moulding, under 900-960 ℃ of high temperature, carry out sintering and cold working, under 840-900 ℃ of high temperature, be squeezed into web then, through being drawn into the wire product of 1.3～5.0mm.
Example 7: take by weighing the 15.26Kg silver ingot, add 0.5Kg chromium powder, 0.08Kg zinc powder, 0.032Kg nickel powder, 0.128Kg copper powder, processing condition subsequently with example 6.
Example 8: take by weighing the 15.424Kg silver ingot, add 0.4Kg chromium powder, 0.032Kg zinc powder, 0.048Kg nickel powder, 0.064Kg copper powder, 0.016Kg tungsten powder subsequently, processing condition are with example 6.
Example 9: take by weighing the 12.608Kg silver ingot, add 3.28Kg chromium powder, 0.032Kg, tungsten powder, 0.08Kg vanadium powder subsequently, processing condition are with example 6.
Example 10: take by weighing the 13.62Kg silver ingot, add 2.3Kg chromium powder, 0.048Kg tungsten powder, 0.032Kg vanadium powder subsequently, processing condition are with example 6.
Example 11: take by weighing the 14.704Kg silver ingot, add 1.28Kg chromium powder, 0.016Kg vanadium powder subsequently, processing condition are with example 6.
Claims (12)
1, a kind of contact material based on silver-chromium is characterized in that it is to contain chromium in silver matrix, and the share of chromium is 0.5～20.5 weight percent in the material, and the share of silver is the 79.5-99.5 weight percent.
2, a kind of contact material according to claim 1 based on silver-chromium, it is characterized in that containing in the material a kind of of the zinc, tungsten, copper, vanadium or the nickel that account for gross weight 0.1～1.5% or several, and each components contents sum is 100% in this material.
3, a kind of contact material based on silver-chromium according to claim 2 it is characterized in that containing in the material a kind of of the zinc, tungsten, copper, vanadium or the nickel that account for gross weight 0.5～1% or several, and each components contents sum is 100% in this material.
4, a kind of contact material based on silver-chromium according to claim 2, the share that it is characterized in that zinc in the material is 0.1～0.5 weight percent, and each components contents sum is 100% in this material.
5, a kind of contact material based on silver-chromium according to claim 2, the share that it is characterized in that tungsten in the material is 0.1～0.3 weight percent, and each components contents sum is 100% in this material.
6, a kind of contact material based on silver-chromium according to claim 2, the share that it is characterized in that copper in the material is 0.1～0.8 weight percent, and each components contents sum is 100% in this material.
7, a kind of contact material based on silver-chromium according to claim 2, the share that it is characterized in that vanadium in the material is 0.1～0.5 weight percent, and each components contents sum is 100% in this material.
8, a kind of contact material based on silver-chromium according to claim 2, the share that it is characterized in that nickel in the material is 0.1～0.5 weight percent, and each components contents sum is 100% in this material.
9, the production technique of a kind of contact material based on silver-chromium according to claim 1 is characterized in that its processing method is:
Step 1, a kind of of silver ingot, chromium and zinc, tungsten, copper, vanadium or nickel or several are placed smelting furnace melting and ingot casting; Or with silver powder, chromium powder and zinc, tungsten, copper, vanadium or nickel by powder mixing and briquetting, at high temperature sintering and cold working;
Step 2, at high temperature push slivering;
Step 3, can obtain silver-colored chromium through drawing and electrically contact wire rod.
10, the production technique of a kind of contact material based on silver-chromium according to claim 9, the temperature that it is characterized in that its high temperature sintering and extruding is 800～960 ℃.
11, the production technique of a kind of contact material based on silver-chromium according to claim 10, the temperature that it is characterized in that its high temperature sintering and extruding is 840～900 ℃.
12, the production technique of a kind of contact material based on silver-chromium according to claim 11, the temperature that it is characterized in that its high temperature sintering and extruding is 860～880 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021383995A CN1159465C (en) | 2002-09-30 | 2002-09-30 | Silver-chromium based electrical contact material and its production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021383995A CN1159465C (en) | 2002-09-30 | 2002-09-30 | Silver-chromium based electrical contact material and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403608A CN1403608A (en) | 2003-03-19 |
| CN1159465C true CN1159465C (en) | 2004-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021383995A Expired - Fee Related CN1159465C (en) | 2002-09-30 | 2002-09-30 | Silver-chromium based electrical contact material and its production process |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362596C (en) * | 2005-12-20 | 2008-01-16 | 郑茂盛 | High-strength high-conductivity copper alloy contact wire for rapid transit railway |
| CN102592699B (en) * | 2011-11-30 | 2013-06-05 | 中国科学院金属研究所 | Ag/Cr2O3 composite film for contact point and preparation and application thereof |
| CN106119584B (en) * | 2016-08-03 | 2018-04-03 | 江苏大学 | A kind of silver-colored chromium base electrical contact self-lubricating composite and preparation method thereof |
| CN106282641A (en) * | 2016-08-29 | 2017-01-04 | 江苏大学 | A kind of silver chromio electrical contact self-lubricating composite and its production and use |
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