CN103194717A - Technology for preparing silver zinc oxide wire by using wire oxidation technology - Google Patents
Technology for preparing silver zinc oxide wire by using wire oxidation technology Download PDFInfo
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- CN103194717A CN103194717A CN2013100794872A CN201310079487A CN103194717A CN 103194717 A CN103194717 A CN 103194717A CN 2013100794872 A CN2013100794872 A CN 2013100794872A CN 201310079487 A CN201310079487 A CN 201310079487A CN 103194717 A CN103194717 A CN 103194717A
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Abstract
The invention relates to a technology for preparing silver zinc oxide wires by using the wire oxidation technology. Silver zinc oxide electrical contact materials prepared by conventional powder metallurgy is high in production costs and low in finished product yield, and the production process is relatively complicated. The technology for preparing silver zinc oxide wires by using the wire oxidation technology comprises the following steps: 1) smelting and casting ingots 2) treating surfaces, 3) extruding and drawing wires, 4) high temperature high pressure oxidizing, 5) crushing and profiling, and 6) drawing wires. The technology for preparing silver zinc oxide wires by using the wire oxidation technology of the invention is simple in process, low in cost, short in production cycle, environmental-friendly, and pollution-free, and the prepared silver zinc oxide wires has the advantages of good compactness, fine oxide particles, anti-arc corrosion, and long service life.
Description
Technical field
The present invention relates to a kind of technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod.
Background technology
Along with the development of low-voltage apparatus to miniaturization, long lifetime, high reliability direction, more and more higher requirement has been proposed also the leading contact material that is applied to device for switching such as rly., contactor, on-load switch, mesolow isolating switch and household electrical appliance, car electrics.For example, in electromagnetic relay, along with reducing of enameled wire coil dimension and movable contact spring thickness, closed contact force and disjunction power all decline to a great extent, simultaneously because the heat radiation difficulty that miniaturization causes, cause contact and reed temperature rise to increase greatly, cause rly. that early stage melting welding takes place easily and electrical wear increases unusually, had a strong impact on the reliability of rly. work.
The fusing point of ZnO is 2248 ℃, but it begins volatilization at 1370 ℃; The boiling point of Ag is 2212 ℃.The arc property of restriking with silver is benchmark, and the arc reignition characteristic when adding various oxide compound in silver can be divided into by the oxide compound kind and suppress arc reignition or encourage arc reignition two classes.In general this is relevant with decomposition and the boiling temperature of oxide compound.Decomposition temperature is than silver-colored low-boiling oxide material, and its arc voltage of restriking is higher than silver, can suppress arc reignition; And contain the decomposition of oxide materials such as ZrO, MgO, Al2O3 and boiling temperature than silver-colored boiling point height, then encouraged arc reignition.That is to say that boiling temperature is lower than silver, easily distillation or the oxide compound that decomposes, because distillation or the decomposition of electrode surface fierceness, cooling effect is played on the counter electrode surface; And the boiling point metal oxide higher than silver is just poor to the cooling performance of contact.Why AgCdO is called " omnipotent contact ", and its main mechanism also is this.With respect to AgCdO and AgSnO
2, the arc voltage of restriking of AgZnO will be higher than AgCdO, and improves along with the raising of MeO content, but is lower than AgSnO
2Therefore from the electrical property angle, AgZnO material anti-electric-arc scaling loss is better than AgCdO, compares AgSnO
2Differ from, but repeatedly during break-make, the concentration ratio AgCdO of oxide on surface is many, but compares AgSnO
2Few, contact resistance or temperature rise ratio AgCdO height compare AgSnO
2Low; From the processing characteristics aspect, as: drawing/rolling, rivet processing, poorer than AgCdO, compare AgSnO
2Good.Can so think: the over-all properties of AgZnO is all between AgCdO and AgSnO
2Between.Its great advantage is: anti-electrical arc erosion ability height, contact resistance is low and extremely stable.And Zn and Cd belong to II B family element together in the periodic table of elements, and both physics, chemical property are close, and the oxide compound vapour pressure is close, and the contact resistance of AgZnO material is also lower, possesses the possibility of alternative AgCdO system.Yet historically, range of application and the usage quantity of AgZnO are littler than AgCdO, and major applications is on isolating switch.Along with the enforcement of the RoHS of European Union instruction, AgZnO begins to come into one's own as a kind of ep-type material, and use range and usage quantity are more and more wider.Its main range of application: universal frame circuit breaker, breaker of plastic casing, residual current circuit breaker, cut-out switch, load-transfer switch, protection switch, current limliting miniature circuit breaker, household electrical appliances normal open switch, light switch etc.
It is the powder that is atomized into that silver-colored zinc alloy is prepared into silver-colored zinc alloy by the method for melting that the prior powder metallurgy legal system is equipped with the Ag-ZnO contact material, put into box-type furnace behind the die mould in the air oxidation, again by extruding preparation Ag-ZnO wire rod or sheet material, this legal system is equipped with in the powder process, lumber recovery is low, increase production cost, and the production technique relative complex.
Summary of the invention
The technical problem to be solved in the present invention is the above-mentioned defective that how to overcome prior art, and a kind of technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod is provided.
For solving the problems of the technologies described above, this technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod may further comprise the steps:
1) melting ingot casting:
The silver ingot of 12 weight parts placed in the intermediate frequency (IF) smelting stove melt, treat after the fusing that furnace temperature adds the zinc ingot metal of 1 weight part when being down to 950～1000 ℃, evenly stir, treat that furnace temperature is cast into spindle A when rising to 1100～1200 ℃;
2) surface treatment:
After will being cooled off by the spindle A that step 1) obtains, its surface is processed, remove spindle A surface impurity;
3) extruding wire drawing:
Will be through step 2) the spindle A that handles places heating in medium frequency stove internal heating to 800～900 ℃, keep this temperature 10～13min, treat that spindle A internal and external temperature is even, send into extrusion machine and be squeezed into the wire rod A that diameter is 5.5mm that sending into drawing wire machine then is the wire rod B of 1.80mm with this wire rod wire drawing to diameter;
4) High Temperature High Pressure oxidation:
To place the high-pressure oxidation stove by the wire rod B that step 3) obtains, oxidation 24h under 775 ℃, 0.24～0.25Mpa;
5) broken die mould:
To send into through the wire rod B that step 4) is handled and carry out fragmentation in the crusher, breakdown products is sent into and is pressed into spindle B in the extrusion machine;
6) wire drawing:
To be placed heating in medium frequency stove internal heating to 800～920 ℃ by the spindle B that step 5) obtains, keep this temperature 15～17min, treat that the spindle internal and external temperature is even, send into and be squeezed into the wire rod C that diameter is 4.80mm in the extrusion machine, then wire rod C is sent into the drawing wire machine wire drawing, namely get this Ag-ZnO wire rod.
As optimization, treat to add zinc ingot metal when furnace temperature is down to 950 ℃ after the described silver ingot fusing of step 1), treat that furnace temperature is cast into spindle A when rising to 1200 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 800 ℃, keeps this temperature 10min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.25Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 920 ℃, keeps this temperature 17min.
As optimization, treat to add zinc ingot metal when furnace temperature is down to 1000 ℃ after the described silver ingot fusing of described step 1), treat that furnace temperature is cast into spindle A when rising to 1100 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 920 ℃, keeps this temperature 13min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.24Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 800 ℃, keeps this temperature 15min.
As optimization, treat to add zinc ingot metal when furnace temperature is down to 980 ℃ after the described silver ingot fusing of described step 1), treat that furnace temperature is cast into spindle A when rising to 1150 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 850 ℃, keeps this temperature 12min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.25Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 860 ℃, keeps this temperature 16min.
A kind of technical process that utilizes the wire rod oxidation technology to prepare the Ag-ZnO wire rod of the present invention is simple, with low cost, and it is with short production cycle, environment friendly and pollution-free, the Ag-ZnO wire rod that it makes have compactness better, tiny, the anti-arc erosion of oxide compound particle, advantages such as long service life.
Description of drawings
Below in conjunction with accompanying drawing a kind of technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod of the present invention is described further:
Fig. 1 is that this utilizes the wire rod oxidation technology to prepare the process flow sheet of Ag-ZnO wire rod.
Embodiment
Embodiment one: as shown in Figure 1, this technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod may further comprise the steps:
1) melting ingot casting:
The 25.430Kg silver ingot placed in the intermediate frequency (IF) smelting stove melt, treat after the fusing to add the 2.070Kg zinc ingot metal when furnace temperature is down to 980 ℃, evenly stir, treat that furnace temperature is cast into spindle A when rising to 1150 ℃;
2) surface treatment:
After will being cooled off by the spindle A that step 1) obtains, its surface is processed, remove spindle A surface impurity;
3) extruding wire drawing:
Will be through step 2) the spindle A that handles places heating in medium frequency stove internal heating to 850 ℃, keep this temperature 12min, treat that spindle A internal and external temperature is even, send into extrusion machine and be squeezed into the wire rod A that diameter is 5.5mm that sending into drawing wire machine then is the wire rod B of 1.80mm with this wire rod wire drawing to diameter;
4) High Temperature High Pressure oxidation:
To place the high-pressure oxidation stove by the wire rod B that step 3) obtains, oxidation 24h under 775 ℃, 0.25Mpa;
5) broken die mould:
To send into through the wire rod B that step 4) is handled and carry out fragmentation in the crusher, breakdown products is sent into and is pressed into spindle B in the extrusion machine;
6) wire drawing:
To be placed heating in medium frequency stove internal heating to 860 ℃ by the spindle B that step 5) obtains, keep this temperature 16min, treat that the spindle internal and external temperature is even, send into and be squeezed into the wire rod C that diameter is 4.80mm in the extrusion machine, then wire rod C being sent into drawing wire machine, to pull into diameter be 2.50mm, namely gets this Ag-ZnO wire rod.
Above-mentioned embodiment is intended to illustrate the present invention and can be this area professional and technical personnel realization or use; it will be apparent concerning those skilled in the art that above-mentioned embodiment is made amendment; so the present invention includes but be not limited to above-mentioned embodiment; any these claims or specification sheets of meeting described; meet and principle disclosed herein and novelty, the method for inventive features, technology, product, all fall within protection scope of the present invention.
Claims (4)
1. technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod, it is characterized in that: described technology may further comprise the steps:
1) melting ingot casting:
The silver ingot of 12 weight parts placed in the intermediate frequency (IF) smelting stove melt, treat after the fusing that furnace temperature adds the zinc ingot metal of 1 weight part when being down to 950～1000 ℃, evenly stir, treat that furnace temperature is cast into spindle A when rising to 1100～1200 ℃;
2) surface treatment:
After will being cooled off by the spindle A that step 1) obtains, its surface is processed, remove spindle A surface impurity;
3) extruding wire drawing:
Will be through step 2) the spindle A that handles places heating in medium frequency stove internal heating to 800～900 ℃, keep this temperature 10～13min, treat that spindle A internal and external temperature is even, send into extrusion machine and be squeezed into the wire rod A that diameter is 5.5mm that sending into drawing wire machine then is the wire rod B of 1.80mm with this wire rod wire drawing to diameter;
4) High Temperature High Pressure oxidation:
To place the high-pressure oxidation stove by the wire rod B that step 3) obtains, oxidation 24h under 775 ℃, 0.24～0.25Mpa;
5) broken die mould:
To send into through the wire rod B that step 4) is handled and carry out fragmentation in the crusher, breakdown products is sent into and is pressed into spindle B in the extrusion machine;
6) wire drawing:
To be placed heating in medium frequency stove internal heating to 800～920 ℃ by the spindle B that step 5) obtains, keep this temperature 15～17min, treat that the spindle internal and external temperature is even, send into and be squeezed into the wire rod C that diameter is 4.80mm in the extrusion machine, then wire rod C is sent into the drawing wire machine wire drawing, namely get this Ag-ZnO wire rod.
2. the technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod according to claim 1 is characterized in that: treat to add zinc ingot metal when furnace temperature is down to 950 ℃ after the described silver ingot fusing of step 1), treat that furnace temperature is cast into spindle A when rising to 1200 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 800 ℃, keeps this temperature 10min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.25Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 920 ℃, keeps this temperature 17min.
3. the technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod according to claim 1 is characterized in that: treat to add zinc ingot metal when furnace temperature is down to 1000 ℃ after the described silver ingot fusing of described step 1), treat that furnace temperature is cast into spindle A when rising to 1100 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 920 ℃, keeps this temperature 13min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.24Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 800 ℃, keeps this temperature 15min.
4. the technology of utilizing the wire rod oxidation technology to prepare the Ag-ZnO wire rod according to claim 1 is characterized in that: treat to add zinc ingot metal when furnace temperature is down to 980 ℃ after the described silver ingot fusing of described step 1), treat that furnace temperature is cast into spindle A when rising to 1150 ℃; The described spindle A of step 3) places heating in medium frequency stove internal heating to 860 ℃, keeps this temperature 12min; The oxidative pressure of the described high-pressure oxidation stove of step 4) is 0.25Mpa; The described spindle B of step 6) places heating in medium frequency stove internal heating to 860 ℃, keeps this temperature 16min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118332A (en) * | 2019-12-26 | 2020-05-08 | 福达合金材料股份有限公司 | Dynamic internal oxidation method for silver-based metal oxide electrical contact material |
| CN111321315A (en) * | 2020-03-07 | 2020-06-23 | 福达合金材料股份有限公司 | Isolating material for internal oxidation of electric contact material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777438A (en) * | 2010-01-26 | 2010-07-14 | 上海中希合金有限公司 | High-performance silver cadmium oxide material and manufacturing method thereof |
| CN101944441A (en) * | 2010-08-31 | 2011-01-12 | 扬州乐银合金科技有限公司 | Silver zinc oxide electric contact material and preparation method thereof |
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2013
- 2013-03-12 CN CN201310079487.2A patent/CN103194717B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777438A (en) * | 2010-01-26 | 2010-07-14 | 上海中希合金有限公司 | High-performance silver cadmium oxide material and manufacturing method thereof |
| CN101944441A (en) * | 2010-08-31 | 2011-01-12 | 扬州乐银合金科技有限公司 | Silver zinc oxide electric contact material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118332A (en) * | 2019-12-26 | 2020-05-08 | 福达合金材料股份有限公司 | Dynamic internal oxidation method for silver-based metal oxide electrical contact material |
| CN111321315A (en) * | 2020-03-07 | 2020-06-23 | 福达合金材料股份有限公司 | Isolating material for internal oxidation of electric contact material and preparation method thereof |
| CN111321315B (en) * | 2020-03-07 | 2021-05-04 | 福达合金材料股份有限公司 | Isolating material for internal oxidation of electric contact material and preparation method thereof |
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