CN102392170A - Processing method for manufacturing silver tungsten composite contact material - Google Patents
Processing method for manufacturing silver tungsten composite contact material Download PDFInfo
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- CN102392170A CN102392170A CN2011103556311A CN201110355631A CN102392170A CN 102392170 A CN102392170 A CN 102392170A CN 2011103556311 A CN2011103556311 A CN 2011103556311A CN 201110355631 A CN201110355631 A CN 201110355631A CN 102392170 A CN102392170 A CN 102392170A
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- contact material
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Abstract
The invention discloses a processing method for manufacturing a silver tungsten composite contact material, which comprises the following steps: putting tungsten powder in a reaction vessel, adding water and a proper amount of reducing agents, slowly injecting a silver-ammonia complexing solution under stirring, cleaning silver tungsten coating powder to become neutral, drying the powder, performing uniform ball milling treatment by a high-energy bowl mill, performing distressing treatment of the silver tungsten powder, performing primary pressing and molding, performing presintering, infiltration sintering, and secondary pressing with the protection of reducing atmosphere to obtain the silver tungsten composite contact material. The invention has an advanced and simple process; the distribution of tungsten particles in a silver substrate is improved by a coating process based on a chemical plating principle; a high-energy bowl milling process is selected to allow the powder particles to repeatedly generate cold welding and fractures, which causes atomic diffusion in the powder particles and improves the mechanical properties, physical properties, electrical properties, and the like of the material; a high temperature presintering process is adopted, which increases the material compactness, greatly optimizes the conductivity, reduces resistivity, and improves arc erosion resistance.
Description
Technical field
The present invention relates to a kind of producing and manufacturing technique that is used to make the silver-colored tungsten composite contact material that electric switches such as isolating switch, heavy loading switch, Mgs, tap changer use.
Background technology
In the low-voltage apparatus electrical contact material, the silver tungsten contact material is widely used on all kinds of breaker of plastic casing, frame-type universal circuit breaker, the car electrics.HMP tungsten particle in the silver tungsten contact is disperse and distributes in silver matrix, this material has good anti-arc erosion property, wear resistance, low and stable contact resistance.
At home, generally adopt powder mixing machine or common infiltration process production, this is simple for process, flow process is few, low for equipment requirements, material use efficiency is high, production cost is low, but that organize prepared contact is inhomogeneous, compactness is relatively poor, the arc erosion rate is high.
Summary of the invention
The object of the invention is exactly the deficiency that exists to above-mentioned prior art; A kind of working method of making silver-colored tungsten composite contact material is provided; Make the metallographic structure of produced silver-colored tungsten composite contact material evenly tiny, have excellent mechanical and physical performance, density of material is big; Electric conductivity is significantly optimized, and improves the anti-electric-arc corrosive power.
The objective of the invention is to realize like this, a kind of working method of making silver-colored tungsten composite contact material is characterized in that; After placing reaction vessels to add water and an amount of reductive agent the tungsten powder; Under stirring state, slowly spray into silver-colored ammino and close solution, silver-colored tungsten coated composite powder carries out even ball-milling processing through high energy ball mill again through cleaning to neutral drying; Through first pressing after the silver-colored tungsten powder stress removing is shaped, under the reducing atmosphere protection through presintering, melting infiltration sintering, be pressed into silver-colored tungsten composite contact material again;
The concentration that said silver-colored ammino closes solution is 50～500g/l;
The ball-to-powder weight ratio of said ball-milling processing is 100～20:1, and the ball milling time is 5～20 hours;
Said stress removing processing parameter is: protective atmosphere is that hydrogen or ammonia decompose hydrogen, and annealing temperature is 700～900 ℃, and soaking time is 2～5 hours;
The unit pressure that said first pressing is shaped is 4～7T/cm
2
Said pre-sintering process parameter is: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1000～1250 ℃, and soaking time is 0.5～3 hour;
Said melting infiltration sintering processing parameter is: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1100～1250 ℃, and soaking time is 10～30 minutes;
The said unit pressure that is pressed into shape again is 10～15T/cm
2
Said tungsten powder is 2～10 μ m tungsten powders.
By weight percentage, silver is 5～35% in the said silver-colored tungsten powder, and tungsten is 95%～65%.
Add additive when said tungsten powder places reaction vessels, it is 0.1～1.0% that additive accounts for silver-colored tungsten powder gross weight.
Said additive is nickel or copper.
Said reductive agent is common reductive agent (like a Hydrazine Hydrate 80, formaldehyde, etc.).
Technology of the present invention is advanced simple, utilizes the cladding process of electroless plating principle to improve the distribution of tungsten particle in silver matrix, improves the physical bond intensity of nonwetting storeroom; Select for use high-energy ball milling technology to make powder particle produce cold welding, fracture repeatedly, cause atomic diffusion in the powder particle, thereby obtain alloying powder, the mechanical property of raising material, physicals, electrical property etc.; Adopt the high temperature pre-sinter process, guarantee that fully base substrate pore pipeline communicates, thereby avoid producing the sealing cavity, improve material compactness.The silver-colored tungsten composite contact material metallographic structure that the present invention makes is evenly tiny, has excellent mechanical and physical performance, and density is big, and electric conductivity is significantly optimized, and resistivity is low, and has improved the anti-electric-arc corrosive power.
Embodiment
1. technical process
After placing reaction vessels to add water and an amount of reductive agent the tungsten powder; Under stirring state, slowly spray into silver-colored ammino and close solution; Silver tungsten coated composite powder is through cleaning to neutral drying; Carry out even ball-milling processing through high energy ball mill again, through first pressing after the silver-colored tungsten powder stress removing is shaped, under the reducing atmosphere protection through presintering, melting infiltration sintering, be pressed into silver-colored tungsten composite contact material again.Its technical process: tungsten powder → coating silver powder → high-energy ball milling processing → stress removing → first pressing shaping → presintering → melting infiltration sintering → surface treatment → multiple pressure → surface treatment → finished product.
After perhaps proportioning places reaction vessels to add water and an amount of reductive agent by a certain percentage with tungsten powder, copper powder and additive; Under stirring state, slowly spray into quantitative silver-colored ammino and close solution; Silver tungsten coated composite powder is through cleaning to neutral drying; Carry out even processing at high energy ball mill again, through first pressing after the silver-colored tungsten powder stress removing is shaped, under the reducing atmosphere protection through presintering, melting infiltration sintering, be pressed into silver-colored tungsten composite contact material again.Its technical process: tungsten powder, copper powder and additive → coating silver powder → high-energy ball milling processing → stress removing → first pressing shaping → presintering → melting infiltration sintering → surface treatment → multiple pressure → surface treatment → finished product.
2. material composition, shared weight percent
Starting material: 2～10 μ m tungsten powders, 50～500g/l silver ammino close solution.By weight percentage, silver is 5～35% in the silver-colored tungsten powder, and tungsten is 95%～65%.Additive is nickel or copper, is 0.1～1.0% of silver-colored tungsten powder gross weight.
3. processing parameter
3.1 coated with silver powder craft parameter: it is 50～500g/l that silver-colored ammino closes strength of solution.
3.2 high-energy ball milling processing parameter: ball-to-powder weight ratio is 100～20:1, and the ball milling time is 5～20 hours.
3.3 stress removing processing parameter: protective atmosphere is that hydrogen or ammonia decompose hydrogen, and annealing temperature is 700～900 ℃, and soaking time is 2～5 hours.
3.4 first pressing forming parameters: first pressing shaping unit pressure is 4～7T/cm
2
3.5 pre-sintering process parameter: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1000～1250 ℃, and soaking time is 0.5～3 hour.
3.6 melting infiltration sintering processing parameter: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1100～1250 ℃, and soaking time is 10～30 minutes.
3.7 be pressed into the shape processing parameter again: being pressed into the shape unit pressure again is 10～15T/cm
2
Claims (5)
1. working method of making silver-colored tungsten composite contact material; It is characterized in that, place reaction vessels to add water and an amount of reductive agent tungsten powder after, under stirring state, slowly spray into silver-colored ammino and close solution; Silver tungsten coated composite powder is through cleaning to neutral drying; Carry out even ball-milling processing through high energy ball mill again, through first pressing after the silver-colored tungsten powder stress removing is shaped, under the reducing atmosphere protection through presintering, melting infiltration sintering, be pressed into silver-colored tungsten composite contact material again;
The concentration that said silver-colored ammino closes solution is 50～500g/l;
The ball-to-powder weight ratio of said ball-milling processing is 100～20:1, and the ball milling time is 5～20 hours;
Said stress removing processing parameter is: protective atmosphere is that hydrogen or ammonia decompose hydrogen, and annealing temperature is 700～900 ℃, and soaking time is 2～5 hours;
The unit pressure that said first pressing is shaped is 4～7T/cm
2
Said pre-sintering process parameter is: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1000～1250 ℃, and soaking time is 0.5～3 hour;
Said melting infiltration sintering processing parameter is: protective atmosphere is hydrogen or decomposed ammonia, and sintering temperature is 1100～1250 ℃, and soaking time is 10～30 minutes;
The said unit pressure that is pressed into shape again is 10～15T/cm
2
2. a kind of working method of making silver-colored tungsten composite contact material according to claim 1 is characterized in that, said tungsten powder is 2～10 μ m tungsten powders.
3. a kind of working method of making silver-colored tungsten composite contact material according to claim 1 and 2 is characterized in that, by weight percentage, silver is 5～35% in the said silver-colored tungsten powder, and tungsten is 95%～65%.
4. a kind of working method of making silver-colored tungsten composite contact material according to claim 3 is characterized in that, adds additive when said tungsten powder places reaction vessels, and it is 0.1～1.0% that additive accounts for silver-colored tungsten powder gross weight.
5. a kind of working method of making silver-colored tungsten composite contact material according to claim 4 is characterized in that said additive is nickel or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110355631 CN102392170B (en) | 2011-11-11 | 2011-11-11 | Processing method for manufacturing silver tungsten composite contact material |
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| CN 201110355631 CN102392170B (en) | 2011-11-11 | 2011-11-11 | Processing method for manufacturing silver tungsten composite contact material |
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| CN102392170A true CN102392170A (en) | 2012-03-28 |
| CN102392170B CN102392170B (en) | 2013-03-13 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737863A (en) * | 2012-07-03 | 2012-10-17 | 扬州乐银合金科技有限公司 | Silver nickel graphite composite contact terminal material and processing method thereof |
| CN103247450A (en) * | 2013-04-22 | 2013-08-14 | 浙江天银合金技术有限公司 | Electrical contact |
| CN103464742A (en) * | 2013-09-18 | 2013-12-25 | 武汉理工大学 | Preparation method of copper-cladded silver-clad tungsten composite clad powder |
| CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
| CN104480335A (en) * | 2014-11-28 | 2015-04-01 | 桂林电器科学研究院有限公司 | Preparation method of silver tungsten contact material |
| CN105364075A (en) * | 2014-08-29 | 2016-03-02 | 优美科科技材料（苏州）有限公司 | Manufacturing method for long-bar-shaped fine-grain copper-tungsten contact |
| CN105798319A (en) * | 2014-12-31 | 2016-07-27 | 施耐德电气工业公司 | Preparation method and device for silver-tungsten electrical contact material as well as electrical contact material and electrical contact |
| CN110129603A (en) * | 2019-04-15 | 2019-08-16 | 福达合金材料股份有限公司 | A kind of production method and products thereof of silver tungsten contact material |
| CN111360274A (en) * | 2020-03-07 | 2020-07-03 | 福达合金材料股份有限公司 | Silver-tungsten electric contact material and preparation method thereof |
| CN114182122A (en) * | 2021-11-23 | 2022-03-15 | 浙江福达合金材料科技有限公司 | High-dispersity silver-molybdenum electrical contact material and preparation method thereof |
| CN114192774A (en) * | 2021-11-23 | 2022-03-18 | 浙江福达合金材料科技有限公司 | Silver-tungsten electrical contact material with high dispersion degree and high compactness and preparation method thereof |
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| CN1062928A (en) * | 1990-12-28 | 1992-07-22 | 中南工业大学 | The metallurgical contact alloy of tungsten-copper-silver-nickel by powder |
| CN101651050A (en) * | 2009-07-20 | 2010-02-17 | 温州宏丰电工合金有限公司 | Submicron particle reinforced Ag-based electrical contact material and preparation method thereof |
-
2011
- 2011-11-11 CN CN 201110355631 patent/CN102392170B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062928A (en) * | 1990-12-28 | 1992-07-22 | 中南工业大学 | The metallurgical contact alloy of tungsten-copper-silver-nickel by powder |
| CN101651050A (en) * | 2009-07-20 | 2010-02-17 | 温州宏丰电工合金有限公司 | Submicron particle reinforced Ag-based electrical contact material and preparation method thereof |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737863B (en) * | 2012-07-03 | 2015-01-28 | 扬州乐银合金科技有限公司 | Silver nickel graphite composite contact terminal material and processing method thereof |
| CN102737863A (en) * | 2012-07-03 | 2012-10-17 | 扬州乐银合金科技有限公司 | Silver nickel graphite composite contact terminal material and processing method thereof |
| CN103247450A (en) * | 2013-04-22 | 2013-08-14 | 浙江天银合金技术有限公司 | Electrical contact |
| CN103464742A (en) * | 2013-09-18 | 2013-12-25 | 武汉理工大学 | Preparation method of copper-cladded silver-clad tungsten composite clad powder |
| CN103464742B (en) * | 2013-09-18 | 2016-01-20 | 武汉理工大学 | The compound coating raw powder's production technology of the coated tungsten of a kind of copper clad silver |
| CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
| CN105364075B (en) * | 2014-08-29 | 2018-10-02 | 优美科管理（上海）有限公司 | A kind of manufacturing method of strip fine grain copper tungsten contact |
| CN105364075A (en) * | 2014-08-29 | 2016-03-02 | 优美科科技材料（苏州）有限公司 | Manufacturing method for long-bar-shaped fine-grain copper-tungsten contact |
| CN104480335A (en) * | 2014-11-28 | 2015-04-01 | 桂林电器科学研究院有限公司 | Preparation method of silver tungsten contact material |
| CN105798319A (en) * | 2014-12-31 | 2016-07-27 | 施耐德电气工业公司 | Preparation method and device for silver-tungsten electrical contact material as well as electrical contact material and electrical contact |
| CN110129603A (en) * | 2019-04-15 | 2019-08-16 | 福达合金材料股份有限公司 | A kind of production method and products thereof of silver tungsten contact material |
| CN110129603B (en) * | 2019-04-15 | 2021-03-30 | 福达合金材料股份有限公司 | Method for manufacturing silver-tungsten contact material and product thereof |
| CN111360274A (en) * | 2020-03-07 | 2020-07-03 | 福达合金材料股份有限公司 | Silver-tungsten electric contact material and preparation method thereof |
| CN114182122A (en) * | 2021-11-23 | 2022-03-15 | 浙江福达合金材料科技有限公司 | High-dispersity silver-molybdenum electrical contact material and preparation method thereof |
| CN114192774A (en) * | 2021-11-23 | 2022-03-18 | 浙江福达合金材料科技有限公司 | Silver-tungsten electrical contact material with high dispersion degree and high compactness and preparation method thereof |
| CN114192774B (en) * | 2021-11-23 | 2023-05-09 | 浙江福达合金材料科技有限公司 | Silver-tungsten electrical contact material with high dispersity and high compactness and preparation method thereof |
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