CN108493024A - A kind of silver-tin electrical contact material and preparation method thereof - Google Patents
A kind of silver-tin electrical contact material and preparation method thereof Download PDFInfo
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- CN108493024A CN108493024A CN201810494269.8A CN201810494269A CN108493024A CN 108493024 A CN108493024 A CN 108493024A CN 201810494269 A CN201810494269 A CN 201810494269A CN 108493024 A CN108493024 A CN 108493024A
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- 239000000463 material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 title claims 8
- 239000000843 powder Substances 0.000 claims abstract description 54
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910001152 Bi alloy Inorganic materials 0.000 claims abstract description 19
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 19
- 229910001887 tin oxide Inorganic materials 0.000 claims abstract description 19
- CCXYPVYRAOXCHB-UHFFFAOYSA-N bismuth silver Chemical compound [Ag].[Bi] CCXYPVYRAOXCHB-UHFFFAOYSA-N 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 239000004332 silver Substances 0.000 claims abstract description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000005245 sintering Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- QAAXRTPGRLVPFH-UHFFFAOYSA-N [Bi].[Cu] Chemical compound [Bi].[Cu] QAAXRTPGRLVPFH-UHFFFAOYSA-N 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000000498 ball milling Methods 0.000 claims 1
- ALKZAGKDWUSJED-UHFFFAOYSA-N dinuclear copper ion Chemical compound [Cu].[Cu] ALKZAGKDWUSJED-UHFFFAOYSA-N 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910001097 yellow gold Inorganic materials 0.000 claims 1
- 239000010930 yellow gold Substances 0.000 claims 1
- IVQODXYTQYNJFI-UHFFFAOYSA-N oxotin;silver Chemical compound [Ag].[Sn]=O IVQODXYTQYNJFI-UHFFFAOYSA-N 0.000 abstract description 15
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 abstract description 11
- QLEDNNMPZAAWCF-UHFFFAOYSA-N [Cu].[Ag].[Bi] Chemical compound [Cu].[Ag].[Bi] QLEDNNMPZAAWCF-UHFFFAOYSA-N 0.000 abstract description 11
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052797 bismuth Inorganic materials 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 5
- 238000003466 welding Methods 0.000 abstract description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 12
- 238000007731 hot pressing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 6
- 238000004663 powder metallurgy Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
本发明公开了一种银‑氧化锡电触头材料及其制备方法，以银铋合金粉或银铜合金粉或银铋铜合金粉及氧化锡粉体为原料，将含银粉体和氧化锡粉体球磨混料，混合料经烧结成致密体，致密体经轧制成带(片)材或经挤压成丝材。铋、铜的加入改善银氧化锡触头工作状态下液态银润湿氧化锡的能力，同时提高材料的抗熔焊能力，降低材料转移，提高材料的电寿命。The invention discloses a silver-tin oxide electric contact material and a preparation method thereof. Using silver-bismuth alloy powder or silver-copper alloy powder or silver-bismuth-copper alloy powder and tin oxide powder as raw materials, the silver-containing powder and oxidized The tin powder is ball milled and mixed, the mixed material is sintered into a dense body, and the dense body is rolled into a strip (sheet) or extruded into a wire. The addition of bismuth and copper improves the ability of liquid silver to wet tin oxide under the working state of the silver tin oxide contact, and at the same time improves the anti-welding ability of the material, reduces material transfer, and improves the electrical life of the material.
Description
技术领域technical field
本发明涉及一种银-氧化锡电触头材料及其制备方法，属电接触材料技术领域。The invention relates to a silver-tin oxide electric contact material and a preparation method thereof, belonging to the technical field of electric contact materials.
背景技术Background technique
电触头材料是接触器、继电器、高低压开关的重要部件，其性能直接影响着整个开关电路的可靠性和电器的使用寿命。Ag-SnO2以其良好的抗电弧能力和在直流负载下的抗材料转移能力脱颖而出，成为替代有毒Ag-CdO的电触头材料，得到广泛应用。Electrical contact materials are important components of contactors, relays, and high-voltage and low-voltage switches, and their performance directly affects the reliability of the entire switching circuit and the service life of electrical appliances. Ag- SnO2 stands out for its good arc resistance and material transfer resistance under DC load, and has become an electrical contact material to replace toxic Ag-CdO and has been widely used.
Ag-SnO2制备工艺主要是合金内氧化法和粉末冶金法。欧洲主要倾向于粉末冶金法，其产品中第二相弥散均匀，成本较低，冷加工性能良好，易于加入其他添加物，但密度和硬度较低，耐磨能力较低；日本则以内氧化法为主，其产品密度高，硬度高，具有良好的耐电弧侵蚀性能，但其产品容易在径向形成成分富集区，塑性加工困难，电弧作用下易脆裂，加入其他添加物困难，且设备要求高，成本较高。Ag-SnO 2 preparation technology is mainly alloy internal oxidation method and powder metallurgy method. Europe is mainly inclined to the powder metallurgy method, the second phase of its products is uniformly dispersed, the cost is low, the cold working performance is good, and other additives are easy to add, but the density and hardness are low, and the wear resistance is low; Japan’s internal oxidation method is Mainly, its product has high density, high hardness, and good arc corrosion resistance, but its product is easy to form a component-enriched area in the radial direction, difficult to plastically process, easy to be brittle under the action of arc, difficult to add other additives, and equipment The requirements are high and the cost is high.
粉末冶金法制备银氧化锡触头是目前国内主要制备方法。该方法批量生产的银氧化锡触头的电寿命低于10万次。而随着电子电气工业的发展，要求银氧化锡触头的电寿命高于30万次，这对我国电触头制备行业是一个巨大挑战。The preparation of silver tin oxide contacts by powder metallurgy is currently the main preparation method in China. The electric life of the silver-tin oxide contacts mass-produced by the method is less than 100,000 times. With the development of the electrical and electronic industry, the electrical life of silver tin oxide contacts is required to be higher than 300,000 times, which is a huge challenge for my country's electrical contact preparation industry.
影响电触头寿命的主要因素是工作状态下电触头组织恶化。电弧作用下，在触头表面产生液池，液态银在氧化锡表面不润湿，电弧作用后氧化锡易聚集，组织恶化，触头电性能下降，这是影响Ag-SnO2电触头材料电性能和使用寿命的最主要原因。The main factor affecting the life of electrical contacts is the deterioration of the electrical contact structure under working conditions. Under the action of the arc, a liquid pool is formed on the surface of the contact, and the liquid silver is not wet on the surface of the tin oxide. After the action of the arc, the tin oxide is easy to gather, the structure deteriorates, and the electrical performance of the contact decreases. This is affecting the Ag-SnO 2 electrical contact material. The most important reason for electrical performance and service life.
发明内容Contents of the invention
为了解决上述问题，本发明提出向银中加入铋、铜合金元素，以银铋合金粉或银铜合金粉或银铋铜合金粉及氧化锡粉体为原料采用粉末冶金工艺制备银氧化锡电触头材料。铋、铜的加入是为了改善工作状态下液态银润湿氧化锡的能力，同时提高材料的抗熔焊能力，进而提高材料的电寿命。In order to solve the above problems, the present invention proposes to add bismuth and copper alloy elements to silver, and use silver-bismuth alloy powder or silver-copper alloy powder or silver-bismuth-copper alloy powder and tin oxide powder as raw materials to prepare silver tin oxide electrode by powder metallurgy process. contact material. The addition of bismuth and copper is to improve the ability of liquid silver to wet tin oxide under working conditions, and at the same time improve the anti-welding ability of the material, thereby improving the electrical life of the material.
本发明的意义在于铋、铜的加入改善银氧化锡触头工作状态下液态银润湿氧化锡的能力，同时提高材料的抗熔焊能力，进而提高材料的电寿命。The significance of the invention lies in that the addition of bismuth and copper improves the ability of the liquid silver to wet the tin oxide under the working state of the silver tin oxide contact, and at the same time improves the welding resistance of the material, thereby improving the electrical life of the material.
本发明的目的在于提供一种银-氧化锡电触头材料的制备方法，将含银粉体和氧化锡粉体球磨混料，混合料经烧结成致密体，致密体经轧制成带(片)材或经挤压成丝材。所述含银粉体选自银铋合金粉或银铜合金粉或银铋铜合金粉。The object of the present invention is to provide a kind of preparation method of silver-tin oxide electric contact material, with silver-containing powder and tin oxide powder ball mill mixing, mixing is sintered into dense body, and dense body is rolled into strip ( sheet) or extruded into wire. The silver-containing powder is selected from silver-bismuth alloy powder, silver-copper alloy powder or silver-bismuth-copper alloy powder.
进一步地，在上述技术方案中，所述银铋合金粉中含铋量为0.001-1wt％，余量为银。Further, in the above technical solution, the bismuth content in the silver-bismuth alloy powder is 0.001-1wt%, and the balance is silver.
进一步地，在上述技术方案中，所述银铜合金粉中含铜量为0.001-1wt％，余量为银。Further, in the above technical solution, the copper content in the silver-copper alloy powder is 0.001-1wt%, and the balance is silver.
进一步地，在上述技术方案中，所述银铋铜合金粉中含铋量为0.001-1wt％，含铜量为0.001-1wt％，余量为银。Further, in the above technical solution, the silver-bismuth-copper alloy powder contains 0.001-1 wt% of bismuth, 0.001-1 wt% of copper, and the balance is silver.
进一步地，在上述技术方案中，所述银-氧化锡电触头材料中氧化锡质量百分含量为7-20％。Further, in the above technical solution, the mass percentage of tin oxide in the silver-tin oxide electrical contact material is 7-20%.
进一步地，在上述技术方案中，所述烧结温度为650-960℃时间0.1-10h。Further, in the above technical solution, the sintering temperature is 650-960° C. for 0.1-10 hours.
本发明提供上述制备方法得到的银-氧化锡电触头材料。The invention provides the silver-tin oxide electrical contact material obtained by the above preparation method.
发明有益效果Beneficial effect of the invention
本发明涉及一种银-氧化锡电触头材料及其制备方法，以银铋合金粉或银铜合金粉或银铋铜合金粉及氧化锡粉体为原料采用粉末冶金工艺制备银氧化锡电触头材料。铋、铜的加入是为了改善工作状态下液态银润湿氧化锡的能力，同时提高材料的抗熔焊能力，进而提高材料的电寿命。The invention relates to a silver-tin oxide electrical contact material and a preparation method thereof. Silver-bismuth alloy powder or silver-copper alloy powder or silver-bismuth-copper alloy powder and tin oxide powder are used as raw materials to prepare silver-tin oxide electrical contacts by powder metallurgy. contact material. The addition of bismuth and copper is to improve the ability of liquid silver to wet tin oxide under working conditions, and at the same time improve the anti-welding ability of the material, thereby improving the electrical life of the material.
附图说明Description of drawings
图1本发明银氧化锡电触头材料带(片)、丝材制备流程图。Fig. 1 is a flow chart of preparation of silver tin oxide electrical contact material tape (sheet) and wire material of the present invention.
图2银氧化锡电触头材料丝材图片。Fig. 2 Picture of wire material of silver tin oxide electrical contact material.
具体实施方式Detailed ways
以下结合附图对本发明作进一步说明。以下实施例只是作为理解本发明用，并不限制本发明。The present invention will be further described below in conjunction with accompanying drawing. The following examples are only used for understanding the present invention, and do not limit the present invention.
实施例1Example 1
1、以1kg银铋合金粉为原料，银铋合金粉中铋含量为0.1wt％。1. Using 1 kg of silver-bismuth alloy powder as raw material, the content of bismuth in the silver-bismuth alloy powder is 0.1wt%.
2、将1kg银铋合金粉置于球磨桶中，加入300g氧化锆球，并加入120g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-bismuth alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 120 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
4、将混合粉体热压烧结成Φ28×30mm柱体，热压烧结温度800℃，热压烧结1h，压力30MPa。4. The mixed powder is hot-pressed and sintered into a Φ28×30mm cylinder, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
6、将热压烧结柱体加热至800℃，于钢模中挤压，模具加热至400℃。挤压在400吨4柱油压机上进行，挤压模具内径为6mm。对挤压后的棒材在链条机上拉拔成Φ0.3mm丝材，每道次变形量为20％。6. Heat the hot-pressed sintered cylinder to 800°C, extrude it in a steel mold, and heat the mold to 400°C. The extrusion is carried out on a 400-ton 4-column hydraulic press, and the inner diameter of the extrusion die is 6mm. The extruded bar is drawn into a Φ0.3mm wire on a chain machine, and the deformation of each pass is 20%.
实施例2Example 2
1、以1kg银铋合金粉为原料，银铋合金粉中铋含量为0.1wt％。1. Using 1 kg of silver-bismuth alloy powder as raw material, the content of bismuth in the silver-bismuth alloy powder is 0.1wt%.
2、将1kg银铋合金粉置于球磨桶中，加入300g氧化锆球，并加入120g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-bismuth alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 120 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
3、将混合粉体热压烧结成70×30×8mm块体，热压烧结温度800℃，热压烧结1h，压力30MPa。3. The mixed powder is hot-pressed and sintered into a 70×30×8mm block, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
4、将热压烧结块体在双辊轧机上轧制成0.25mm厚带(片)材，每道次变形量为20％。4. Roll the hot-pressed sintered block into a 0.25 mm thick strip (sheet) on a two-roll mill, with a deformation of 20% per pass.
实施例3Example 3
1、以1kg银铜合金粉为原料，银铜合金粉中铜含量为0.15wt％。1. Using 1kg of silver-copper alloy powder as raw material, the copper content in the silver-copper alloy powder is 0.15wt%.
2、将1kg银铜合金粉置于球磨桶中，加入300g氧化锆球，并加入100g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-copper alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 100 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
4、将混合粉体热压烧结成Φ28×30mm柱体，热压烧结温度800℃，热压烧结1h，压力30MPa。4. The mixed powder is hot-pressed and sintered into a Φ28×30mm cylinder, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
6、将热压烧结柱体加热至800℃，于钢模中挤压，模具加热至400℃。挤压在400吨4柱油压机上进行，挤压模具内径为6mm。对挤压后的棒材在链条机上拉拔成Φ0.3mm丝材，每道次变形量为20％。6. Heat the hot-pressed sintered cylinder to 800°C, extrude it in a steel mold, and heat the mold to 400°C. The extrusion is carried out on a 400-ton 4-column hydraulic press, and the inner diameter of the extrusion die is 6mm. The extruded bar is drawn into a Φ0.3mm wire on a chain machine, and the deformation of each pass is 20%.
实施例4Example 4
1、以1kg银铜合金粉为原料，银铜合金粉中铜含量为0.15wt％。1. Using 1kg of silver-copper alloy powder as raw material, the copper content in the silver-copper alloy powder is 0.15wt%.
2、将1kg银铜合金粉置于球磨桶中，加入300g氧化锆球，并加入100g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-copper alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 100 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
3、将混合粉体热压烧结成70×30×8mm块体，热压烧结温度800℃，热压烧结1h，压力30MPa。3. The mixed powder is hot-pressed and sintered into a 70×30×8mm block, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
4、将热压烧结块体在双辊轧机上轧制成0.25mm厚带(片)材，每道次变形量为20％。4. Roll the hot-pressed sintered block into a 0.25 mm thick strip (sheet) on a two-roll mill, with a deformation of 20% per pass.
实施例5Example 5
1、以1kg银铜铋合金粉为原料，银铜铋合金粉中铜含量为0.15wt％，铋含量为0.1wt％。1. Using 1kg of silver-copper-bismuth alloy powder as raw material, the copper content in the silver-copper-bismuth alloy powder is 0.15wt%, and the bismuth content is 0.1wt%.
2、将1kg银铜铋合金粉置于球磨桶中，加入300g氧化锆球，并加入130g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-copper-bismuth alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 130 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
4、将混合粉体热压烧结成Φ28×30mm柱体，热压烧结温度800℃，热压烧结1h，压力30MPa。4. The mixed powder is hot-pressed and sintered into a Φ28×30mm cylinder, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
6、将热压烧结柱体加热至800℃，于钢模中挤压，模具加热至400℃。挤压在400吨4柱油压机上进行，挤压模具内径为6mm。对挤压后的棒材在链条机上拉拔成Φ0.3mm丝材，每道次变形量为20％。6. Heat the hot-pressed sintered cylinder to 800°C, extrude it in a steel mold, and heat the mold to 400°C. The extrusion is carried out on a 400-ton 4-column hydraulic press, and the inner diameter of the extrusion die is 6mm. The extruded bar is drawn into a Φ0.3mm wire on a chain machine, and the deformation of each pass is 20%.
实施例6Example 6
1、以1kg银铜铋合金粉为原料，银铜铋合金粉中铜含量为0.15wt％，铋含量为0.1wt％。1. Using 1kg of silver-copper-bismuth alloy powder as raw material, the copper content in the silver-copper-bismuth alloy powder is 0.15wt%, and the bismuth content is 0.1wt%.
2、将1kg银铜铋合金粉置于球磨桶中，加入300g氧化锆球，并加入130g氧化锡粉体，密封球磨罐，球磨混料2h。2. Put 1 kg of silver-copper-bismuth alloy powder in a ball mill barrel, add 300 g of zirconia balls, and add 130 g of tin oxide powder, seal the ball mill pot, and mill the mixture for 2 hours.
3、将混合粉体热压烧结成70×30×8mm块体，热压烧结温度800℃，热压烧结1h，压力30MPa。3. The mixed powder is hot-pressed and sintered into a 70×30×8mm block, the hot-pressing sintering temperature is 800°C, the hot-pressing sintering is 1h, and the pressure is 30MPa.
4、将热压烧结块体在双辊轧机上轧制成0.25mm厚带(片)材，每道次变形量为20％。4. Roll the hot-pressed sintered block into a 0.25 mm thick strip (sheet) on a two-roll mill, with a deformation of 20% per pass.
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| CN109355523A (en) * | 2018-10-23 | 2019-02-19 | 浙江大学 | A kind of Ag/Zn2SnO4 new conductive alloy and preparation method thereof |
| CN110735094A (en) * | 2019-11-12 | 2020-01-31 | 西安工程大学 | Nano tin oxide fiber reinforced silver tin oxide low-voltage contact material and preparation method thereof |
| CN111979536A (en) * | 2020-09-18 | 2020-11-24 | 武汉大学 | Hydrophobic rare earth doped copper-silver alloy-carbon nano composite coating material for electrical contact and preparation method thereof |
| EP3978638A4 (en) * | 2019-05-31 | 2023-09-06 | OMRON Corporation | Material for contact and containing ag alloy as main component, contact using said material for contact, and electrical device |
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