CN101944441B - Silver zinc oxide electric contact material and preparation method thereof - Google Patents
Silver zinc oxide electric contact material and preparation method thereof Download PDFInfo
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- CN101944441B CN101944441B CN201010274287A CN201010274287A CN101944441B CN 101944441 B CN101944441 B CN 101944441B CN 201010274287 A CN201010274287 A CN 201010274287A CN 201010274287 A CN201010274287 A CN 201010274287A CN 101944441 B CN101944441 B CN 101944441B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a silver zinc oxide electric contact material and a preparation method thereof, and belongs to the technical field of electrical materials. The method comprises the following steps of: melting and ingoting silver, zinc and additives in a smelter according to a certain weight ratio, sintering and extruding into strips, and drawing to form a silver-zinc alloy wire material; oxidizing the silver-zinc alloy wire material to obtain a silver zinc oxide wire material; cutting the wire material into pieces by an open-back inclinable press, pressing the cut pieces in a steel die to manufacture an extruded stock, and sintering and extruding the cut pieces to manufacture a plate or a wire material; polishing the surface of the extruded plate, performing hot rolling on silver, rolling, punching and molding; and drawing, annealing and drawing the extruded wire material to a finished product wire material with phi of between 0.5 and 3.0mm to produce the rivet electric contact. In the method, the silver-zinc wire material is used for oxidation, so the alloy is easily oxidized without special oxidizing equipment; the metallographic phase of the material has uniform tissue without an oxidation zinc lean region or oxidation aggregation, and the consistency of the material performance, high compactness and good processing performance can be ensured; the method can realize mass production and has low production cost; and the production process and the material per se have no pollution to the environment.
Description
Technical field
The present invention relates to a kind of novel silver zinc oxide electric contact material and preparation method thereof, belong to the electrical material technical field.
Background technology
The electric contact material of appliance switches uses such as domestic various relays, contactor is main with Agcdo at present; Though the Agcdo electric contact material has material property and lower material cost preferably; Especially the high oxidation cadmium is all the more so, and manufacture craft is stable ripe, but contains the cadmium oxide in the electric contact product; In environment, understand residual cadmium salt later on; Because cadmium metal and cadmium salt have very big toxic and side effect to human body, environmental pollution is serious, uses the Agcdo electric contact material so can progressively limit.And the Ag-ZnO electric contact material is a kind of novel environment friendly slider material; Its manufacturing approach has following several kinds: mix silver powder, oxide powder and zinc and additive (1) in mixed powder machine; Take by weighing suitable weight, through press compression moulding, blank carries out being pressed into finished product again behind the sintering.(2) silver powder, oxide powder and zinc and additive are mixed in mixed powder machine, through waiting static pressure ingot, sintering, be squeezed into sheet material or silk material, become finished product through rolling, punching out or Wire Drawing.(3) silver, zinc and additive are placed smelting furnace melting ingot casting, be squeezed into silver-colored zinc alloy plate, rolling, the punching out slabbing contact of multiple again silver, the contact is oxidized to finished product under HTHP.(4) silver ingot, zinc and additive are placed smelting furnace melting and ingot casting, be squeezed into a material, wire drawing is to the certain size oxidation, and being worked into needs size, and system breaks into rivet.But there are some aspects that need improve and improve in these technologies, like the material metallographic structure, processing characteristics and mechanical and physical performance.The product metallographic structure that internal oxidation process is made is inhomogeneous, has poor zinc district, causes material short useful life, oxidation furnaces is required high.The product metallographic structure that powder metallurgical technique is made is inhomogeneous, and density is low, is difficult to satisfy the instructions for use of big electric current.How to provide that a kind of metallographic structure is evenly distributed, processing characteristics and the good Ag-ZnO electric contact material of mechanical and physical performance be the difficult problem that those skilled in the art are difficult to capture always.
Summary of the invention
The objective of the invention is deficiency,, a kind of novel silver zinc oxide electric contact material and preparation method thereof is provided for satisfying the needs in market to prior art.
A kind of Ag-ZnO electric contact material; It is characterized in that by silver, zinc, nickel, copper and tin through melting ingot casting, sintering extruding slivering, be drawn into line, oxidation processes, be cut into broken section, be pressed into base, sintering is squeezed into sheet material or wire rod; Sheet material is through surface finish, the multiple silver of hot rolling, annealing, finish rolling, punch forming; Process sheet Ag-ZnO electric contact material, wire rod is through drawing, annealing, drawing, and system breaks into the rivet electric contact; The percentage by weight of said silver, zinc is respectively: silver-colored 90-95%, zinc 5-10%, nickel, copper and tin are respectively 0.15-0.25%, 0.05-0.45%, the 0.05-0.3% of silver, zinc weight summation.
A kind of preparation method of Ag-ZnO electric contact material is characterized in that may further comprise the steps:
(1) with behind the melting ingot casting in silver, zinc, nickel, copper and the tin adding smelting furnace, sintering pushes slivering, leads to be drawn into silver-colored kirsite wire rod again; The percentage by weight of said silver, zinc is respectively: silver-colored 90-95%, zinc 5-10%, nickel, copper and tin are respectively 0.15-0.25%, 0.05-0.45%, the 0.05-0.3% of silver, zinc weight summation, and melting ingot casting temperature is 1050-1200 ℃; Said sintering extruding slivering temperature is 720-850 ℃, and is incubated 1-4 hour, and extrusion ratio is 1: 150-300;
(2) silver-colored kirsite wire rod is carried out HTHP and be oxidized to the Ag-ZnO wire rod, the oxygen pressure of said oxidation is 0.3-0.6Mpa, and oxidizing temperature is 600-750 ℃, and oxidization time is 10-30 hour;
(3) the Ag-ZnO wire rod is cut into broken section 5-20mm through open-type inclinable press processing, in punching block, is pressed into extruded stock with broken section, and sintering is squeezed into sheet material or wire rod again;
(4) sheet material that above-mentioned (3) is squeezed into carries out being rolled and punch forming behind surface finish processing and the multiple silver of hot rolling, processes sheet Ag-ZnO electric contact material; The wire rod that above-mentioned (3) are squeezed into carries out drawing, annealing, pulls to the wire rod of Φ 0.5-3.0mm again, and system breaks into the rivet electric contact.
Described in the step (3) is 50-250Mpa with broken section pressure that in punching block, is pressed into extruded stock, and keeps the time of 0.5-20s; Sintering is squeezed into that sintering temperature is 820-900 ℃ in sheet material or the wire rod, and temperature retention time is 1-4h, and extrusion ratio is 1: 150-300, extrusion speed are 5-10cm/min, 350-500 ℃ of extrusion die preheat temperature.
Annealing temperature described in the step (4) is 550-700 ℃, temperature retention time 1-4h.
Formulation ratio of the present invention is scientific and reasonable, manufactures easily.The present invention has the following advantages: adopt the oxidation of silver-colored zinc wire material, alloy is very easy to oxidation, need not special oxidation furnaces; The material metallographic structure is even, the poor zinc of non-oxidation district, and non-oxidation is assembled, and has guaranteed the consistency of material property, and density is high, good processability; The raw material of Ag-ZnO electrical contact material is prepared simple, and technological process is easy to control, and is with short production cycle, can realize producing in enormous quantities, and production cost is low; The compliance with environmental protection requirements of environmentally safe, and material in process of production own.
Embodiment
Embodiment 1
(1) silver, zinc, nickel, copper and tin are added in the smelting furnace behind the melting ingot casting by weight percentage, sintering extruding slivering logically again is drawn into silver-colored kirsite wire rod; The percentage by weight of said silver, zinc is respectively: silver-colored 90-95%, zinc 5-10%, nickel, copper and tin are respectively 0.15-0.25%, 0.05-0.45%, the 0.05-0.3% of silver, zinc weight summation, and melting ingot casting temperature is 1050-1200 ℃; The sintering temperature of said sintering extruding slivering is 720-850 ℃, and is incubated 1-4 hour, and extrusion ratio is 1: 150-300.
(2) silver-colored kirsite wire rod is carried out HTHP and be oxidized to the Ag-ZnO wire rod, the oxygen pressure of said oxidation is 0.3-0.6Mpa, and oxidizing temperature is 600-750 ℃, and oxidization time is 10-30 hour.
(3) the Ag-ZnO wire rod is cut into broken section 5-20mm through open-type inclinable press processing, in punching block, is pressed into extruded stock with broken section, and sintering is squeezed into sheet material or wire rod again.The pressure that is pressed into extruded stock in the punching block is 50-250Mpa, and keeps the time of 0.5-20s; Sintering is squeezed into that sintering temperature is 820-900 ℃ in sheet material or the wire rod, and temperature retention time is 1-4h, and extrusion ratio is 1: 150-300, extrusion speed are 5-10cm/min, 350-500 ℃ of extrusion die preheat temperature.
(4) sheet material that (3) sintering is squeezed into carries out being rolled and punch forming behind surface finish processing and the multiple silver of hot rolling, processes sheet Ag-ZnO electric contact material.
(5) wire rod that (3) sintering is squeezed into carries out drawing, annealing, pulls to the wire rod of Φ 0.5-3.0mm again, and system breaks into the rivet electric contact.Described annealing temperature is 550-700 ℃, temperature retention time 1-4h.
Process sheet or wire Ag-ZnO electric contact material, metallographic structure is even, and density is high, good electrical property, and the poor zinc of non-oxidation district, non-oxidation is assembled, good processability.
Embodiment 2
(1) silver, zinc, nickel, copper and tin are added in the smelting furnace behind the melting ingot casting by weight percentage, sintering extruding slivering logically again is drawn into silver-colored kirsite wire rod; The percentage by weight of said silver, zinc is respectively: silver 95%, zinc 5%, nickel, copper and tin are respectively 0.25%, 0.45%, 0.05% of silver, zinc weight summation, and melting ingot casting temperature is 1050 ℃; The sintering temperature of said sintering extruding slivering is 720 ℃, and is incubated 1 hour, and extrusion ratio is 1: 150.
(2) silver-colored kirsite wire rod is carried out HTHP and be oxidized to the Ag-ZnO wire rod, the oxygen pressure of said oxidation is 0.3Mpa, and oxidizing temperature is 600 ℃, and oxidization time is 30 hours.
(3) the Ag-ZnO wire rod is cut into broken section 5mm through open-type inclinable press processing, in punching block, is pressed into extruded stock with broken section, and sintering is squeezed into sheet material or wire rod again.The pressure that is pressed into extruded stock in the punching block is 50Mpa, and keeps the time of 2s; Sintering is squeezed into that sintering temperature is 820 ℃ in sheet material or the wire rod, and temperature retention time is 1h, and extrusion ratio is 1: 150, and extrusion speed is 5cm/min, 350 ℃ of extrusion die preheat temperatures.
(4) sheet material that (3) sintering is squeezed into carries out being rolled and punch forming behind surface finish processing and the multiple silver of hot rolling, processes sheet Ag-ZnO electric contact material.
(5) wire rod that (3) sintering is squeezed into carries out drawing, annealing, pulls to the wire rod of Φ 0.5mm again, and system breaks into the rivet electric contact.Described annealing temperature is 550 ℃, temperature retention time 1h.
Process sheet or wire Ag-ZnO electric contact material, metallographic structure is even, and density is high, good electrical property, and the poor zinc of non-oxidation district, non-oxidation is assembled, good processability.
Embodiment 3
(1) silver, zinc, nickel, copper and tin are added in the smelting furnace behind the melting ingot casting by weight percentage, sintering extruding slivering logically again is drawn into silver-colored kirsite wire rod; The percentage by weight of said silver, zinc is respectively: silver 90%, zinc 10%, nickel, copper and tin are respectively 0.15%, 0.05%, 0.3% of silver, zinc weight summation, and melting ingot casting temperature is 1200 ℃; The sintering temperature of said sintering extruding slivering is 850 ℃, and is incubated 4 hours, and extrusion ratio is 1: 300.
(2) silver-colored kirsite wire rod is carried out HTHP and be oxidized to the Ag-ZnO wire rod, the oxygen pressure of said oxidation is 0.6Mpa, and oxidizing temperature is 750 ℃, and oxidization time is 10 hours.
(3) the Ag-ZnO wire rod is cut into broken section 20mm through open-type inclinable press processing, in punching block, is pressed into extruded stock with broken section, and sintering is squeezed into sheet material or wire rod again.The pressure that is pressed into extruded stock in the punching block is 250Mpa, and keeps the time of 20s; Sintering is squeezed into that sintering temperature is 900 ℃ in sheet material or the wire rod, and temperature retention time is 4h, and extrusion ratio is 1: 300, and extrusion speed is 10cm/min, 500 ℃ of extrusion die preheat temperatures.
(4) sheet material that (3) sintering is squeezed into carries out being rolled and punch forming behind surface finish processing and the multiple silver of hot rolling, processes sheet Ag-ZnO electric contact material.
(5) wire rod that (3) sintering is squeezed into carries out drawing, annealing, pulls to the wire rod of Φ 3.0mm again, and system breaks into the rivet electric contact.Described annealing temperature is 700 ℃, temperature retention time 4h.
Process sheet or wire Ag-ZnO electric contact material, metallographic structure is even, and density is high, good electrical property, and the poor zinc of non-oxidation district, non-oxidation is assembled, good processability.
Claims (2)
1. Ag-ZnO electric contact material; It is characterized in that by silver, zinc, nickel, copper and tin through melting ingot casting, sintering extruding slivering, be drawn into line, oxidation processes, be cut into broken section, be pressed into base, sintering is squeezed into sheet material or wire rod; Sheet material is through surface finish, the multiple silver of hot rolling, annealing, finish rolling, punch forming; Process sheet Ag-ZnO electric contact material, wire rod is through drawing, annealing, drawing, and system breaks into the rivet electric contact; The percentage by weight of said silver, zinc is respectively: silver-colored 90-95%, zinc 5-10%, nickel, copper and tin are respectively 0.15-0.25%, 0.05-0.45%, the 0.05-0.3% of silver, zinc weight summation.
2. the preparation method of an Ag-ZnO electric contact material is characterized in that may further comprise the steps:
(1) with behind the melting ingot casting in silver, zinc, nickel, copper and the tin adding smelting furnace, sintering pushes slivering, leads to be drawn into silver-colored kirsite wire rod again; The percentage by weight of said silver, zinc is respectively: silver-colored 90-95%, zinc 5-10%, nickel, copper and tin are respectively 0.15-0.25%, 0.05-0.45%, the 0.05-0.3% of silver, zinc weight summation, and melting ingot casting temperature is 1050-1200 ℃; Said sintering extruding slivering temperature is 720-850 ℃, and is incubated 1-4 hour, and extrusion ratio is 1: 150-300;
(2) silver-colored kirsite wire rod is carried out HTHP and be oxidized to the Ag-ZnO wire rod, the oxygen pressure of said oxidation is 0.3-0.6Mpa, and oxidizing temperature is 600-750 ℃, and oxidization time is 10-30 hour;
(3) the Ag-ZnO wire rod is cut into broken section 5-20mm through open-type inclinable press processing; In punching block, be pressed into extruded stock with broken section; Sintering is squeezed into sheet material or wire rod again, and described is 50-250Mpa with broken section pressure that in punching block, is pressed into extruded stock, and keeps the time of 0.5-20s; Sintering is squeezed into that sintering temperature is 820-900 ℃ in sheet material or the wire rod, and temperature retention time is 1-4h, and extrusion ratio is 1: 150-300, extrusion speed are 5-10cm/min, 350-500 ℃ of extrusion die preheat temperature;
(4) sheet material that above-mentioned (3) is squeezed into carries out being rolled and punch forming behind surface finish processing and the multiple silver of hot rolling, processes sheet Ag-ZnO electric contact material; The wire rod that above-mentioned (3) are squeezed into carries out drawing, annealing, pulls to the wire rod of Φ 0.5-3.0mm again, and system breaks into the rivet electric contact, and described annealing temperature is 550-700 ℃, temperature retention time 1-4h.
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| CN201010274287A CN101944441B (en) | 2010-08-31 | 2010-08-31 | Silver zinc oxide electric contact material and preparation method thereof |
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| CN201010274287A CN101944441B (en) | 2010-08-31 | 2010-08-31 | Silver zinc oxide electric contact material and preparation method thereof |
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| CN101944441A CN101944441A (en) | 2011-01-12 |
| CN101944441B true CN101944441B (en) | 2012-10-03 |
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Families Citing this family (13)
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| CN102808097B (en) * | 2012-08-20 | 2014-04-16 | 温州宏丰电工合金股份有限公司 | Silver/nickel/metallic oxide electrical contact material preparation method |
| CN102931001B (en) * | 2012-11-07 | 2015-09-23 | 福达合金材料股份有限公司 | A kind of contact material of silver-colored nickel oxide iron oxide and preparation method |
| CN103194717B (en) * | 2013-03-12 | 2015-04-08 | 宁波汉博贵金属合金有限公司 | Technology for preparing silver zinc oxide wire by using wire oxidation technology |
| CN103700544B (en) * | 2013-12-18 | 2016-08-17 | 福达合金材料股份有限公司 | A kind of preparation method of the tin-oxygen-silver electric contact material of even tissue |
| CN103824711B (en) * | 2013-12-20 | 2016-01-20 | 宁波赛特勒电子有限公司 | A kind of double silver base composite oxidate electric contact material and application thereof |
| CN104201020B (en) * | 2014-08-19 | 2016-05-11 | 周朝贵 | Manufacturing process of siller tin oxide calcium oxide electrical contact and products thereof |
| CN104201019B (en) * | 2014-08-19 | 2016-05-11 | 张树堂 | Manufacturing process of Ag-ZnO cupric oxide electrical contact and products thereof |
| CN104201018B (en) * | 2014-08-19 | 2016-05-11 | 周朝贵 | Manufacturing process of Agcdo zirconia electrical contact and products thereof |
| CN104493178B (en) * | 2014-12-30 | 2016-09-14 | 桂林电器科学研究院有限公司 | A kind of processing method of the silver zinc oxide electrical contact material containing additive |
| CN106854710B (en) * | 2016-12-30 | 2019-04-05 | 温州宏丰电工合金股份有限公司 | A kind of preparation method and device of silver-based electric contact material |
| 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 |
| CN112095057B (en) * | 2020-08-08 | 2021-09-17 | 福达合金材料股份有限公司 | Nano silver wire modified silver-nickel electric contact material and preparation method thereof |
| CN112151291B (en) * | 2020-08-18 | 2023-06-06 | 浙江福达合金材料科技有限公司 | Silver metal oxide electric contact material with long service life and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300440A (en) * | 1999-04-23 | 2001-06-20 | 田中贵金属工业株式会社 | Method for preparing Ag-Zno type electric contact material and electric contact material |
| CN101202168A (en) * | 2007-10-23 | 2008-06-18 | 福达合金材料股份有限公司 | Technique for preparation of novel silver zinc oxide contact material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61272338A (en) * | 1985-05-29 | 1986-12-02 | Sumitomo Electric Ind Ltd | Silver-zinc oxide-type electric contact point material |
| JP2007012570A (en) * | 2005-07-04 | 2007-01-18 | Tanaka Kikinzoku Kogyo Kk | Ag-OXIDE ELECTRIC CONTACT MATERIAL, AND RELAY, AC GENERAL-USE RELAY AND AUTOMOBILE RELAY USING THE SAME |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300440A (en) * | 1999-04-23 | 2001-06-20 | 田中贵金属工业株式会社 | Method for preparing Ag-Zno type electric contact material and electric contact material |
| CN101202168A (en) * | 2007-10-23 | 2008-06-18 | 福达合金材料股份有限公司 | Technique for preparation of novel silver zinc oxide contact material |
Non-Patent Citations (1)
| Title |
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| JP昭61-272338A 1986.12.02 |
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