CN104625259A - Lanthanum-molybdenum cathode filament material - Google Patents
Lanthanum-molybdenum cathode filament material Download PDFInfo
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- CN104625259A CN104625259A CN201510004013.0A CN201510004013A CN104625259A CN 104625259 A CN104625259 A CN 104625259A CN 201510004013 A CN201510004013 A CN 201510004013A CN 104625259 A CN104625259 A CN 104625259A
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- lanthanum
- molybdenum
- cathode filament
- filament material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/04—Electrodes specially adapted therefor or their manufacture
- B23H1/06—Electrode material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/04—Electrodes specially adapted therefor or their manufacture
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- Mechanical Engineering (AREA)
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Abstract
The invention provides a lanthanum-molybdenum cathode filament material, belongs to the field of refractory metal materials, and particularly relates to the long service life lanthanum- molybdenum cathode filament material. The service life of the lanthanum-molybdenum cathode filament material is prolonged by the improvement of the cathode functional performance, so that the resource is saved, and the environment load is reduced. The lanthanum-molybdenum cathode filament material is characterized by comprising 0.02%-0.03% of ZrO2, 0.3%-3% of lanthanum oxide and the balance metal molybdenum. According to the lanthanum-molybdenum cathode filament material, the zirconium oxide is directly coped with lanthanum-molybdenum mixed powder, or metal salt including zirconium is coped with the lanthanum-molybdenum mixed powder. A cathode filament for spark cutting is prepared by processing the evenly doped powder through a conventional lanthanum-molybdenum filament material preparation technology. By the addition of the high temperature stable phase of the zirconium oxide in the lanthanum-molybdenum cathode filament material, a good mechanical property is achieved by the cathode filament in a high temperature working environment, and the service life of the cathode filament is prolonged by 20%-60%; besides, the preparation technology of the long service life filament material is the same as the conventional lanthanum-molybdenum cathode filament preparation technology, so that the preparation technology does not need great modification or adjustments, the popularization and implementation are facilitated, and the application prospects are wide.
Description
Technical field
The invention belongs to refractory metal material field, be specifically related to a kind of long-life La-Mo cathode material, by improving cathode function characteristic, its service life can be improved, thus economize on resources, alleviating carrying capacity of environment.
Background technology
In modern processing, spark cutting technology receives much attention because of its good machining accuracy, its application constantly expands, especially for difficult-to-machine material as the processing of the metals such as tungsten, the machining that spark cutting technology is more traditional has more advantage, cathode filament is as the Primary Component of electro-spark cutting machine, the quality of its performance directly affects the application of spark cutting technology, the uniformity coefficient of cathode filament diameter determines the Mass accuracy of spark machined, and the life-span of cathode filament determines the operating efficiency of spark erosion technique.Therefore the performance and used life promoting cathode filament is further the key of spark cutting technical development.
The cathode filament material that spark cutting technical requirement uses should have good electric conductivity, and electron work functon is low, higher tensile strength and good electrocorrosion-resisting performance.This type of material mainly contains in the market: molybdenum filament, tungsten filament, tungsten molybdenum wire, brass wire, copper tungsten filament etc., copper wire wears no resistance, tensile strength is low, generally only be applied in the operating mode of low-speed wire cutting, the tensile strength of tungsten filament and tungsten molybdenum wire is all larger, but cost of manufacture costly, and in the working environment of frequent rapid heat cycle, brittle and the fracture of wire of easy generation, service life is shorter, and molybdenum cathode filament has excellent electric conductivity, fusing point is high, relatively easy machine-shaping, and tensile strength is large, electrocorrosion-resisting performance is good, become the Wire EDM cathode filament material be most widely used at present.La-Mo cathode silk is the long-life cathode filament of one grown up by doping lanthanum oxide in molybdenum filament, the doping of lanthana not only reduces the electron work functon of material and improves the tensile strength of material, and its service life more traditional molybdenum filament is greatly improved.
The development of modern processing, make the wrapping wire of novel electro-spark cutting machine more complicated, automaticity is higher, for cathode filament tensile strength and propose more harsh requirement service life, the present invention is based on the basis of La-Mo cathode silk for this reason, optimizing components is carried out to it, to promote its service life.
Summary of the invention
The present invention mainly proposes a kind of long-life cathode filament material system, and its feature is as follows:
Containing mass fraction in 1 cathode filament material is the ZrO of 0.02%-0.3%
2, the lanthana of 0.3-3%, all the other are metal molybdenum.
2 zirconias can directly and lanthanum molybdenum mixed-powder adulterate, metallic salt also can be adopted as zirconium nitrate, and zirconium acetate etc. adulterate with lanthanum molybdenum powder.
The powder of 3 uniform doping is prepared into spark cutting cathode filament through conventional lanthanum molybdenum filament material preparation technology processing.
Feature of the present invention:
The present invention is by adding this high-temperature stable phase of zirconia, can make La-Mo cathode silk in high-temperature work environment, there is good mechanical property, make improve 20%-60% the service life of cathode filament simultaneously, and the preparation technology of this kind of long-life La-Mo cathode silk material is identical with conventional La-Mo cathode silk preparation technology, must not carry out larger amendment or adjustment to preparation technology, be beneficial to implementation, have a extensive future.
Detailed description of the invention
Embodiment 1:
Configure the mixed-powder that zirconic mass fraction is 0.02%, namely get 2000 object Zirconium oxide powder 2 grams and average-size 2 microns 9.998 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 0.3%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 90 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 75 hours.
Implement 2:
Configuration zirconia mass fraction is the mixed powder of 0.1%, namely get 2000 object Zirconium oxide powder 10 grams and average-size 5 microns 9.99 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 0.3%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 100 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 75 hours.
Embodiment 3
Configuration zirconia mass fraction is the mixed powder of 0.3%, namely get 2000 object Zirconium oxide powder 30 grams and average-size 3 microns 9.97 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 0.3%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 110 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 75 hours.
Embodiment 4:
Configuration zirconia mass fraction is 0.02% zirconic mixed-powder, namely get 2000 object Zirconium oxide powder 2 grams and average-size 2 microns 9.998 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 1%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 115 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 86 hours.
Embodiment 5:
Configuration zirconia mass fraction is 0.1% zirconic mixed powder, namely get 2000 object Zirconium oxide powder 10 grams and average-size 5 microns 9.99 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 1%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 145 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 86 hours.
Embodiment 6
Configuration zirconia mass fraction is 0.3% zirconic mixed powder, namely get 2000 object Zirconium oxide powder 30 grams and average-size 3 microns 9.97 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 1%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 141 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 86 hours.
Embodiment 7:
Configuration zirconia mass fraction is 0.02% zirconic mixed-powder, namely get 2000 object Zirconium oxide powder 2 grams and average-size 2 microns 9.998 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 3%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 118 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 88 hours.
Embodiment 8:
Configuration zirconia mass fraction is 0.1% zirconic mixed powder, namely get 2000 object Zirconium oxide powder 10 grams and average-size 5 microns 9.99 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 3%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 140 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 88 hours.
Embodiment 9
Configuration zirconia mass fraction is 0.3% zirconic mixed powder, namely get 2000 object Zirconium oxide powder 30 grams and average-size 3 microns 9.97 kilograms of lanthanum molybdenum powder (lanthana quality account for whole powder mix after gross mass 1%) mix, batch mixing adopts V-type batch mixer, mixing time 20 hours, rotor speed 40 revs/min during batch mixing, and at interval of 3 hours, stop 0.5 hour.
By uniform for batch mixing lanthanum molybdenum zirconium powder end, excellent base that isostatic cool pressing is pressed into diameter 17 millimeters is carried out Jiang Bang Pi in Medium frequency induction sintering furnace under the pressure of 190MPa, sinter to 2000 DEG C, be incubated 12 hours, after swage through cogging, 203,202 to swage, 201 swage after, through multi pass drawing, be worked into Φ 0.3mm, then be cold drawn to Φ 0.18mm through room temperature, be used for cutting pure molybdenum product by this Φ 0.18mm lanthanum molybdenum alloy wire, operating current is 1A, operating voltage is 75 volts, reaches more than 143 hours service life.And under similarity condition, the service life of the lanthanum molybdenum filament that market is purchased is only 88 hours.
Claims (3)
1. a La-Mo cathode wire material, is characterized in that: be the ZrO of 0.02%-0.3% containing mass fraction
2, the lanthana of 0.3-3%, all the other are metal molybdenum.
2. a kind of La-Mo cathode wire material according to claim 1, is characterized in that: this material feedstock directly adulterate with lanthanum molybdenum mixed-powder by zirconia, or employing contains the slaine of zirconium and lanthanum molybdenum powder is adulterated.
3. a kind of La-Mo cathode wire material according to claim 2, is characterized in that: the slaine containing zirconium is zirconium nitrate or zirconium acetate.
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| CN201510004013.0A CN104625259B (en) | 2015-01-03 | 2015-01-03 | Lanthanum-molybdenum cathode filament material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913791A (en) * | 2017-12-13 | 2019-06-21 | 现代自动车株式会社 | Friction member and its coating method with wear-resistant coating |
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| US6090227A (en) * | 1997-05-09 | 2000-07-18 | Schwarzkopf Technologies Corp. | Structural units for glass melts made from a molybdenum/tungsten alloy |
| CN101439429A (en) * | 2008-12-10 | 2009-05-27 | 宁波博威集团有限公司 | Electrode wire for slow-travel wire spark erosion fabrication and preparation method thereof |
| US20090317281A1 (en) * | 2008-06-18 | 2009-12-24 | Peter Grandics | method of atomic transformation |
| CN101660066A (en) * | 2009-09-08 | 2010-03-03 | 北京天龙钨钼科技有限公司 | Making method of tungsten or molybdenum composite material containing lanthanum |
| CN103849804A (en) * | 2014-03-01 | 2014-06-11 | 深圳市威勒达科技开发有限公司 | Non-radiative multi-component composite tungsten negative material for microwave oven magnetron and preparation process of negative material |
-
2015
- 2015-01-03 CN CN201510004013.0A patent/CN104625259B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6090227A (en) * | 1997-05-09 | 2000-07-18 | Schwarzkopf Technologies Corp. | Structural units for glass melts made from a molybdenum/tungsten alloy |
| US20090317281A1 (en) * | 2008-06-18 | 2009-12-24 | Peter Grandics | method of atomic transformation |
| CN101439429A (en) * | 2008-12-10 | 2009-05-27 | 宁波博威集团有限公司 | Electrode wire for slow-travel wire spark erosion fabrication and preparation method thereof |
| CN101660066A (en) * | 2009-09-08 | 2010-03-03 | 北京天龙钨钼科技有限公司 | Making method of tungsten or molybdenum composite material containing lanthanum |
| CN103849804A (en) * | 2014-03-01 | 2014-06-11 | 深圳市威勒达科技开发有限公司 | Non-radiative multi-component composite tungsten negative material for microwave oven magnetron and preparation process of negative material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913791A (en) * | 2017-12-13 | 2019-06-21 | 现代自动车株式会社 | Friction member and its coating method with wear-resistant coating |
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