CN1045628C - Process for producing electrode material of W-Mg-C copper infiltrated alloy - Google Patents
Process for producing electrode material of W-Mg-C copper infiltrated alloy Download PDFInfo
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- CN1045628C CN1045628C CN96114128A CN96114128A CN1045628C CN 1045628 C CN1045628 C CN 1045628C CN 96114128 A CN96114128 A CN 96114128A CN 96114128 A CN96114128 A CN 96114128A CN 1045628 C CN1045628 C CN 1045628C
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Abstract
The present invention relates to a preparation method for electrode materials of copper intermingled with tungsten-magnesium-carbon alloy, which is suitable for manufacturing alloy electrodes with high density, high precision, ablation resistance and abrasion resistance. The present invention is characterized in that the method comprises the steps of preparation of raw materials, mixing, shaping, reduction treatment, presintering, high-temperature sintering, copper infiltration and finished product formation, wherein the reduction treatment step comprises four stages of treatment at a temperature of 200 to 950 DEG C for 4 to 5.5 hours, presintering at a temperature lower than 1000 DEG C for 2 hours, simultaneous high-temperature sintering and copper infiltration at a temperature of 1100 to 1600 DEG C for 2 to 3 hours. The electrodes manufactured by the present invention have the advantages of homogeneous ingredients, very high abrasion resistance, good ablation resistance, good electrical conductivity, etc.
Description
The present invention relates to make the manufacture method of high-density, high precision, anti-ablation, anti-extreme wear (mechanical wear, electrical wear) alloy electrode, be specially adapted to the manufacture method of W-Mg-C copper infiltrated alloy electrode by metal-powder.
The W-Mg-C copper infiltrated alloy material not only is used for space flight and aviation industry such as pyrostat but also is widely used in the electronic industry, can weld magnetism-free stainless steel as the grid for welding material, the particularly welding of picture tube electron gun emtting electrode, require the anti-ablation of electrode materials, electric conductivity is good, anti-extreme wear, under the situation of long-term non-stop run, require the electrode welding precision must reach 0.1%～0.2%, otherwise pin influences the display quality of picture tube, picture tube is in national defense and military, industrial or agricultural, the scientific research of all trades and professions such as medical science universities and colleges is with being one of important key part in the instrument, it also is one of indispensable detection means in the scientific effort, but reach 0.1%～0.2% welding precision, the anti-ablation, anti-extreme wear, conductivity is good, so far also unsatisfactory, have only to lean on and keep production from external import, inlet electrode material price costliness, therefore, main task of the present invention is to improve the high-density of electrode, high precision, anti-ablation, anti-extreme wear, excellent conducting performance will have tangible economic benefit.
In the prior art, traditional electrode manufacturing method has following several:
1. tungsten powder is directly oozed copper after (this method composition is difficult for evenly) moulding according to a certain percentage with after the copper powder solid mixed number hour, this method can make electrode reach excellent conducting performance, but anti-ablative relatively poor, has a strong impact on the work-ing life and the precision of electrode.
2. tungsten, tungsten carbide powder directly ooze copper after (this method composition still is difficult for evenly) moulding by a certain percentage with after the copper powder solid mixed number hour, though this method is anti-ablative increasing, electric conductivity descends, and causes the decline in work-ing life of electrode and influences precision because batch mixing is inhomogeneous.
In the aforesaid method, particularly powder mixes is inhomogeneous, causing the composition constituent element to compile analyses, batch mixing time control is not strict in addition causes the alloy powder oxidation, molten cementation process system is unreasonable, above-mentioned factors makes tungsten-copper, tungsten-wolfram varbide copper infiltrated alloy not reach high-density, the requirement of high precision, the anti-required electrode of welding of ablating.
The object of the present invention is to provide the manufacture method of good, anti-ablative good, the electrode material of W-Mg-C copper infiltrated alloy that conducts electricity very well of even, the anti-extreme wear of a kind of composition.
At above-mentioned purpose, the present invention adopts following production process: raw material preparation-batch mixing-moulding-reduction processing-presintering-high temperature sintering-ooze copper-finished product.As follows each operation division below:
(1) raw material is prepared: raw material adopts tungsten powder, magnesium powder, carbon dust, tungsten powder adopts trade mark FW-1 tungsten powder, the purity of tungsten powder 〉=99.99%, the granularity of tungsten powder≤2.9 μ m, the granularity of nickel powder≤1.74 μ m, carbon is the uncombined carbon ultrafine powder, magnesium powder, carbon dust adopt the chemical coating method of nickel powder to coat respectively, its purpose makes nickel, carbon light element powder strengthen proportion, and powdered alloy is mixed;
(2) batch mixing: with the tungsten powder of an amount of ratio, in magnesium powder that chemistry coats and carbon dust are packed the blender of efficient sealed formula into, mix mixing time 18～24 hours; The purpose of batch mixing is to make powdered alloy reach the more even effect of microcosmic;
(3) moulding: the above-mentioned powdered alloy that mixes is packed in the punching block, be pressed into the base bar with press;
(4) reduction is handled: the base bar that presses is packed into suspender one by one to be connected with in the hydrogen sintering furnace, and reduction is handled and carried out in four stages:
Fs: 200～300 ℃ of 0.5～1 hour times of reduction temperature
Subordinate phase: 300～500 ℃ of 0.5～1 hour times of reduction temperature
Phase III: 550～700 ℃ of 1～1.5 hour times of reduction temperature
Quadravalence section: 750～950 ℃ of 2 hours times of reduction temperature
(5) presintering: carry out presintering through the base bar after the reduction under 1000 ℃ of temperature and hydrogen shield, the time is 2 hours;
(6) high temperature sintering and infiltration: carry out high temperature sintering through the base bar after the reduction under 1100～1600 ℃ of temperature and hydrogen shield, the time of high temperature sintering is 2～3 hours; In high temperature sintering, ooze copper continuously; Diffusion in magnesium (Mg) after copper forms liquid phase, be dissolved in the solid phase particles in a large number, and stay some micropores where, so expanding appears in sintered compact in original copper powder, when the temperature of γ phase Mg reaches 1150 ℃, at this moment copper is dissolved in the solid phase skeleton fully and forms sosoloid, and is though tungsten, carbon are insoluble to copper, very big to nickel solubleness, be 50% when temperature reaches 1510 ℃, therefore, the fine particle tungsten powder, magnesium carbon dust ambrose alloy mixes the alloy that can be similar to complete densification in right amount behind sintering.
Compared with prior art, the present invention has following advantage and effect.
(1) technical process is integrated, and equipment is simple;
(2) the accurate homogeneous microstructure of W-Mg-C copper infiltrated alloy electrode composition that adopts the present invention to make, with this electrode welding precision reach＜0.1%.
(3) the W-Mg-C copper infiltrated alloy electrode that adopts the present invention to make has thoroughly solved the extreme wear problem.
(4) the low and time weak point of reduction temperature, sintering character is good, and its density can reach approximate 99.6%.
(5) solved the problem of the long base bar bending of 1.7 * 2.0 * 40cm, good processability, mechanical loss is little, moderate cost, and solved electrode by long-term import, cost an arm and a leg and wait some defectives.
Embodiment
Ooze the copper electrode material according to three batches of tungsten magnesium carbon of method trial-production of the present invention, wherein, tungsten powder adopts trade mark FW-1 tungsten powder, the purity of tungsten powder 〉=99.99%, the granularity of tungsten powder≤2.9 μ m, the granularity of nickel powder≤1.74 μ m, carbon is the uncombined carbon ultrafine powder, the processing parameter of these raw materials is listed in table 1, as a comparison case, adopts traditional electrode manufacturing method and has made two batches of electrode materialss, a collection of alloying constituent and constituent element are 70W-Cu, alloying constituent of another batch and constituent element are 65W-5WC-Cu, and table 2 is listed in the physical and mechanical parameter contrast of the embodiment of the invention and Comparative Examples, and the embodiment of the invention and Comparative Examples use-testing the results are shown in table 3.
Table 1 embodiment processing parameter
The physical and mechanical parameter contrast of table 2 embodiment and Comparative Examples
The use-testing result of table 3 embodiment of the invention and Comparative Examples
Claims (1)
1, a kind of manufacture method of electrode material of W-Mg-C copper infiltrated alloy is characterized in that: its operation comprises raw material preparation, batch mixing, moulding, reduction processing, presintering, high temperature sintering, oozes copper, finished product, and concrete operation is as follows:
(1) raw material is prepared: the purity of tungsten powder 〉=99.99%, and the granularity of tungsten powder≤2.9 μ m, the granularity of nickel powder≤1.74 μ m, carbon is the uncombined carbon ultrafine powder, magnesium powder, carbon dust adopt the chemical coating method of nickel powder to coat respectively;
(2) batch mixing: with tungsten powder, in magnesium powder that chemistry coats and carbon dust are packed the blender of efficient sealed formula into, mix mixing time 18～24 hours;
(3) moulding: the above-mentioned powdered alloy that mixes is packed in the punching block, be pressed into the base bar with press;
(4) reduction is handled: the base bar that presses is packed into suspender one by one to be connected with in the hydrogen sintering furnace, and reduction is handled and carried out in four stages:
Fs: 200～300 ℃ of 0.5～1 hour times of reduction temperature
Subordinate phase: 350～500 ℃ of 0.5～1 hour times of reduction temperature
Phase III: 550～700 ℃ of 1～1.5 hour times of reduction temperature
Quadravalence section: 750～950 ℃ of 2 hours times of reduction temperature
(5) presintering: carry out presintering through the base bar after the reduction under 1000 ℃ of temperature and hydrogen shield, the presintering time is 2 hours;
(6) high temperature sintering with ooze copper: carry out high temperature sintering through the base bar after the presintering under 1100～1600 ℃ of temperature and hydrogen shield, the time of high temperature sintering is 2～3 hours; In high temperature sintering, ooze copper continuously; Stop the Shen naturally cooling at last;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114128A CN1045628C (en) | 1996-12-25 | 1996-12-25 | Process for producing electrode material of W-Mg-C copper infiltrated alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114128A CN1045628C (en) | 1996-12-25 | 1996-12-25 | Process for producing electrode material of W-Mg-C copper infiltrated alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156763A CN1156763A (en) | 1997-08-13 |
| CN1045628C true CN1045628C (en) | 1999-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN96114128A Expired - Fee Related CN1045628C (en) | 1996-12-25 | 1996-12-25 | Process for producing electrode material of W-Mg-C copper infiltrated alloy |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4146119B2 (en) * | 2001-12-04 | 2008-09-03 | Ｊｆｅミネラル株式会社 | Copper alloy powder for conductive paste |
| CN101838765B (en) * | 2010-04-02 | 2012-08-22 | 北京天龙钨钼科技有限公司 | Copper-infiltrated furnace for preparing tungsten-copper compound material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062923A (en) * | 1991-01-04 | 1992-07-22 | 西宁文化用品厂 | Flavorous candle and production method thereof |
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1996
- 1996-12-25 CN CN96114128A patent/CN1045628C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062923A (en) * | 1991-01-04 | 1992-07-22 | 西宁文化用品厂 | Flavorous candle and production method thereof |
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| CN1156763A (en) | 1997-08-13 |
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