A preparation method of a rapid bonding of a long silver-graphite electrical contact material and a solder strip material includes the following steps: first step, making a silver-graphite spindle into a silver-graphite electrical contact sheet material by an extrusion process; second step, performing a sintering to composite a solder strip material with the silver-graphite electrical contact sheet material to obtain a composite blank; and third step, performing a rolling and a heat treatment on the composite blank for one or more times to complete the composite of the long silver-graphite electrical contact material and the solder strip material. The method is a method for preparing a silver-based electrical contact material and solder composite material.
H01R 43/04 - Appareils ou procédés spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation de connecteurs de lignes ou de collecteurs de courant ou pour relier les conducteurs électriques pour établir des connexions par déformation, p. ex. outil à plier
A method for preparing an alternating arrangement silver-copper lateral composite ingot, including: using a concave roller set; manufacturing a copper frame having a fixed width according to a negative tolerance of a width of the grooves of the concave roller, and corresponding copper bars and silver bars, and performing a surface treatment on the copper frame, the copper bars, and the silver bars; and then arranging different number of copper bars and silver bars at internals as needed and tightly placing into the copper frame to form a composite blank, i.e., a composite ingot. A method for preparing an alternating arrangement silver-copper lateral composite strip is further provided, and the silver-copper lateral composite ingot prepared by the method for preparing the alternating arrangement silver-copper lateral composite ingot is used to prepare the silver-copper lateral composite strip.
B21B 3/00 - Laminage des matériaux faits d'alliages particuliers dans la mesure où la nature de l'alliage exige ou permet l'emploi de méthodes ou de séquences particulières
C22F 1/02 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid en atmosphère neutre ou contrôlée ou dans le vide
C22F 1/08 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du cuivre ou de ses alliages
C22F 1/14 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid des métaux nobles ou de leurs alliages
3.
METHOD FOR PREPARING PENETRATING-TYPE SILVER-COPPER COMPOSITE INGOT AND STRIP
A method for preparing a penetrating-type silver-copper composite ingot, comprising: using a group of irregularly shaped rolls, the irregularly shaped rolls being a pair of working rolls (2, 3) in a roll system of a four-roll solid-phase composite rolling mill, and grooves (5) being provided at the central positions of the working rolls; manufacturing a copper frame having a fixed width and corresponding copper bars and silver bars according to a negative tolerance of the width of the grooves of the irregularly shaped rolls, and carrying out surface treatment on the copper frame, the copper bars, and the silver bars; alternately and tightly placing different quantities of copper bars and silver bars into the copper frame according to requirements to form a composite blank, i.e., a composite ingot. The present invention also relates to a method for preparing a penetrating-type silver-copper composite strip. The silver-copper composite strip is manufactured by processing the silver-copper composite ingot prepared by the method for preparing a penetrating-type silver-copper composite ingot. The composite ingot manufactured using a penetrating-type method features a simple structure and is easy to splice, such that the subsequent processing technology is optimized and the production period is shortened. By means of the improvement on the roll system of the solid-phase composite rolling mill, the bonding strength of silver and copper side composite strips is effectively improved.
B21B 1/38 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
H01H 85/04 - Fusibles, c.-à-d. organes épuisables du dispositif de protection, p. ex. cartouches
4.
FAST COMPOUNDING PREPARATION METHOD FOR LONG STRIPED SILVER-GRAPHITE ELECTRICAL CONTACT MATERIAL AND SOLDER TAPE
A fast compounding preparation method for a long striped silver-graphite electrical contact material and a solder tape, comprising the following steps: a first step, using an extrusion process to prepare silver-graphite spindles into a silver-graphite electrical contact sheet; a second step, sintering and compounding a solder tape and the silver-graphite electrical contact sheet to obtain a composite blank; and a third step, subjecting the composite blank to rolling and heat treatment for one or more times, so as to complete the compounding of the long striped silver-graphite electrical contact material with the solder tape. Efficient and fast compounding of a long striped silver-graphite electric contact sheet and a solder tape can be realized, a product having good interface bonding quality and high product size accuracy can be produced, and continuity and short flow can be realized, facilitating to achieve automated welding.
Disclosed is a method for preparing an elastic electrical contact composite material. The preparation method comprises: compounding and rolling a stainless steel strip and a Cu strip to prepare a stainless steel (1)/Cu (2) two-layer or stainless steel (1)/Cu (2)/stainless steel (1) three-layer composite strip; performing diffusion heat treatment on the stainless steel (1)/Cu (2) two-layer or stainless steel (1)/Cu (2)/stainless steel (1) three-layer composite strip; performing cyclic treatment on the heat-treated composite strip multiple times; withdrawing and straightening the heat-treated composite material strip; cleaning the withdrawn and straightened composite strip in phases and then slitting same; and punching the slitted composite strip to obtain the desired elastic electrical contact material. With the preparation method by combining phased heat treatment and multiple cyclic treatments, an environment-friendly elastic electrical contact composite material with a high strength, a high elasticity and a low resistivity can be prepared; and the process is simple, the cost is low, and there is no special requirement for a device.
B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
B32B 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
B21B 1/38 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des feuilles de longueur limitée, p. ex. des feuilles pliées, des feuilles superposées
A preparation method of an electrical contact material includes steps of: adopting chemical plating to cover nickel coating on aquadag or metallic oxide, then covering with silver coating, and forming Ag—Ni—C or Ag—Ni—MeO core-shell structure, which improves interface wettability of aquadag, metallic oxide and silver matrix, and removes the adverse effect on the electrical contact material mechanical property due to bad interface wettability in conventional powder metallurgy method. What is important is that the silver in intermediate composite particles is replaced by nickel coating, thus reduce the silver use level. The main function of silver coating is to improve inoxidizability of composite particles, sintering granulation property and the deformability during the manufacturing process of intermediate composite particles, thus improve the technological property.
H01H 1/023 - Matériau composite avec un métal noble comme matériau de base
B22F 1/02 - Traitement particulier des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre, d'améliorer leurs propriétés; Poudres métalliques en soi, p.ex. mélanges de particules de compositions différentes comportant un enrobage des particules
B22F 3/20 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par extrusion
C22C 32/00 - Alliages non ferreux contenant entre 5 et 50% en poids d'oxydes, de carbures, de borures, de nitrures, de siliciures ou d'autres composés métalliques, p. ex. oxynitrures, sulfures, qu'ils soient soient ajoutés comme tels ou formés in situ
B22F 3/24 - Traitement ultérieur des pièces ou objets
C23C 18/32 - Revêtement avec l'un des métaux fer, cobalt ou nickelRevêtement avec des mélanges de phosphore ou de bore et de l'un de ces métaux
A preparation method for electrical contact materials comprises the steps: coating colloidal graphite or metallic oxides with a layer of nickel by chemical plating, and then coating with silver so as to form an Ag-Ni-C or Ag-Ni-MeO core-shell structure. Wettability of the interfaces between the colloidal graphite or the metallic oxides and the silver substrate are improved, and adverse impacts on mechanical properties of the electrical contact materials caused by poor wettability of interfaces in conventional powder metallurgy methods are eliminated. More importantly, the silver of intermediate composite particles is replaced by coating with metal nickel; thereby the consumption of silver is reduced. Main roles of coating with silver are improving oxidation resistance of composite particles, sintering and granulation performances, and deformability of the intermediate composite particles in working, thereby improving processing properties.
A method for preparing silver-based electrical contact materials with fiber-like arrangement of reinforcing nanoparticles includes (1) uniformly mixing reinforcement powders and silver matrix powders for ball milling; (2) pouring the obtained composite powders and silver matrix powders into a powder mixing machine for powder mixing; (3) cold isostatic pressing; (4) sintering; (5) hot pressing; and (6) hot extruding to obtain silver-based electrical contact materials with fiber-like arrangement of reinforcing nanoparticles. The method of the present invention can obtain silver-based electrical contact materials with fiber-like arrangement of reinforcing nanoparticles with no specific requirement on processing deformation, and the plasticity and ductility of the reinforcing phase. Furthermore, it has simple processes, low cost and no particular requirements on the equipment. Contact materials prepared by the present method have good resistance to welding and arc erosion, conductivity and a greatly enhanced processing performance.
H01B 1/02 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement de métaux ou d'alliages
C23C 30/00 - Revêtement avec des matériaux métalliques, caractérisé uniquement par la composition du matériau métallique, c.-à-d. non caractérisé par le procédé de revêtement
9.
Method of preparing silver-based electrical contact materials with directionally arranged reinforcing particles
A method of preparing silver-based electrical contact materials with directionally arranged reinforcing particles includes steps of: (1) preparing composite powders with Ag coating on the reinforcing phase by chemical plating coating; (2) granulating; (3) placing the granulated powders and the matrix silver powders into the powder mixer for mixing; (4) cold-isostatically pressing; (5) sintering; (6) hot-presssing; (7) hot-extruding, thereby obtaining the reinforcing silver-based electrical contact materials with directionally arranged particles. Regardless of the size of reinforcing particles, the present invention can obtain particle-reinforced silver-based materials with excellent electrical performance. The process is simple and easy to operate, and places no special requirements on the equipment. Furthermore, the resistance to welding and arc erosion, and the conductivity of the material prepared by the present invention can be greatly improved. Moreover, the processing performance is excellent.
H01R 43/16 - Appareils ou procédés spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation de connecteurs de lignes ou de collecteurs de courant ou pour relier les conducteurs électriques pour la fabrication des pièces de contact, p. ex. par découpage et pliage
B22F 1/02 - Traitement particulier des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre, d'améliorer leurs propriétés; Poudres métalliques en soi, p.ex. mélanges de particules de compositions différentes comportant un enrobage des particules
B22F 3/16 - Compactage et frittage par des opérations successives ou répétées
B22F 3/20 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par extrusion
B22F 9/24 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par un procédé chimique avec réduction de mélanges métalliques à partir de mélanges métalliques liquides, p. ex. de solutions
H01B 1/02 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement de métaux ou d'alliages
10.
Method of preparing Ag-based oxide contact materials with directionally arranged reinforcing particles
In the present invention, a method of preparing Ag-based oxide contact materials with directionally arranged reinforcing particles is disclosed, comprising steps of: a) preparing evenly dispersed composite powders by chemical co-precipitation method combining with roasting, b) granulating the composite powders by high energy ball milling, and sieving the powders, c) mixing the powders and Ag matrix in a powder mixing machine, d) cold isostatic pressing, e) sintering, f) hot-pressing, g) hot-extruding to obtain Ag-based oxide contact materials with directionally arranged reinforcing particles. This method can obtain particle reinforced Ag-based material with good electrical performance even when the reinforced (oxide) particles are very small. This method is simple, easy to operate, and does not require special equipment. The resistance to welding and arc erosion, electric conductivity and the processability of the material prepared through this present invention can be greatly improved.
B22F 3/20 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par extrusion
H01H 1/0237 - Matériau composite avec un métal noble comme matériau de base et contenant des oxydes
C22C 32/00 - Alliages non ferreux contenant entre 5 et 50% en poids d'oxydes, de carbures, de borures, de nitrures, de siliciures ou d'autres composés métalliques, p. ex. oxynitrures, sulfures, qu'ils soient soient ajoutés comme tels ou formés in situ
B22F 3/04 - Compactage seul par utilisation de pression de fluide
A method of preparing silver-based oxide electrical contact materials with fiber-like arrangement, includes the following steps of: (1) uniformly mixing the silver-metal alloy powders and graphite powders and then ball-milling; (2) internally oxidizing the ball-milled powders; (3) sieving; (4) placing the sieved powders and the matrix powders into the powder mixer for mixing; (5) cold-isostatically pressing; (6) sintering; (7) hot-pressing; and (8) hot-extruding, thereby obtaining the silver-based oxide electrical contact material with fiber-like arrangement. The method of the present invention can obtain the silver-based oxide electrical contact material having neat fiber-like arrangement with no specific requirement on processing deformation, plasticity and ductility of the reinforcing phase. The production process in this method is simple and is easy to operate. Besides, there is no particular requirement on the equipment. The method greatly improves the performance of contact materials in aspects of resistance to welding and arc erosion, conductivity, and processing performance.
B22F 3/04 - Compactage seul par utilisation de pression de fluide
B22F 3/20 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par extrusion
H01B 1/02 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement de métaux ou d'alliages
A method for preparing silver-based oxide electrical contact material with oriented particles involves: producing complex powder by chemical co-precipitation method combined with sintering; granulating by high-energy ball-milling and sieving; mixing the powder and matrix Ag powder; cold isostatic pressing; sintering; hot pressing; and hot extruding. The method can produce particle-reinforced silver-based material having good electric properties, even with fine reinforcing particles, in a simple, easy and low-cost manner without special requirements for devices. The material produced by the method has improved melt-welding resistance, electric arc erosive resistance and electric conductivity, and shows an excellent processing performance.
The invention discloses a method for manufacturing Ag based oxide electrical contact materials with fibrous structure, and the following steps are: the first step, homogeneously mixing the Ag-metal alloying powders and graphite powders, and then milling; the second step, internally oxidizing the obtained powders after being milled; the third step, screening; the fourth step, pouring the powders after being screened and Ag based powders into mixing machine and then mixing; the fifth step, cold isostatic pressing; the sixth step, sintering; the seventh step, hot pressing; the eighth step, hot extruding, and obtaining the Ag based oxide electrical contact materials with fibrous structure. Ag based oxide electrical contact materials with obvious fibrous structure can be obtained in the invention and resistivity against welding, arc ablation resistance and electrical conductivity of materials have been greatly improved, and the machining property is excellent.
A method for preparing a fibrous silver-based oxide electrical contact material involves: melting Ag ingot, metal ingot and additive in a melting furnace, and atomizing to obtain powder; high-energy ball-milling; inner-oxidizing; granulation by high-energy ball-milling and sieving; mixing the powder after ball-milling and sieving with matrix; cold isostatic pressing; sintering; hot pressing; and hot extruding. The method can produce silver-based oxide electrical contact material with obvious fibrous structure, regardless of processing deformation and plasticity and extensibility of the reinforcing phase, in a simple and easy manner without special requirements for devices. The material produced by the method has improved melt-welding resistance, electric arc erosive resistance and electric conductivity, and shows an excellent processing performance.
A preparation method for silver matrix electrical contact materials enhanced by grains with oriented arrangement comprises the following steps: 1) employing process of chemical coating to produce complex powder containing enhancing phase coated by Ag; 2) pelleting; 3) adding the pelleted powder and Ag powder matrix into a mixer to mix; 4) cold isostatic pressing; 5) sintering; 6) hot pressing; 7) hot extruding to obtain the silver matrix electrical contact materials enhanced by grains with oriented arrangement. The method is simple, easy to operate and low cost. The electrical contact materials prepared by the method have the characteristics of good melting-welding resistance, electric arc erosive resistance, electrical conductivity and workability.
H01B 1/00 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs
H01B 1/02 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement de métaux ou d'alliages
H01B 13/00 - Appareils ou procédés spécialement adaptés à la fabrication de conducteurs ou câbles
B22F 9/24 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par un procédé chimique avec réduction de mélanges métalliques à partir de mélanges métalliques liquides, p. ex. de solutions
B22F 3/16 - Compactage et frittage par des opérations successives ou répétées
B22F 1/02 - Traitement particulier des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre, d'améliorer leurs propriétés; Poudres métalliques en soi, p.ex. mélanges de particules de compositions différentes comportant un enrobage des particules
C22C 1/05 - Mélanges de poudre métallique et de poudre non métallique
16.
METHOD FOR PREPARING FIBROUS SILVER-BASED ELECTRICAL CONTACT MATERIAL
A method for preparing a fibrous silver-based electrical contact material involves: uniformly mixing powder material acting as reinforcing phase with silver powder as base before ball milling; mixing the obtained complex powder with the base silver powder in powder mixer; cold isostatic pressing; sintering; hot pressing; hot extruding and obtaining the fibrous silver-based electrical contact material. The method can produce silver-based electrical contact material with obvious fibrous structure, regardless of whether small or large processing deformation is and good or bad plasticity or extensibility of the reinforcing phase is, in a simple, easy and cost-efficient manner without special requirements for devices. The material has improved melt-welding resistance, electric arc erosive resistance and electric conductivity, and shows an excellent processing performance.
brevets
