35results about How to "Improved arc burn resistance" patented technology

The invention discloses a silver-nickel-based electrical contact material and a preparation method thereof. The electrical contact material contains the following components in weight percent: 10-30 percent of nickel, 0.1-10 percent of tantalum carbide (TaC) and the balance of silver. The invention mainly considers the distribution and the enhancement effect of ceramic phase particles, and a ball-milling process, a pressing process, a sintering process, a repressing process and an annealing process are adopted as manufacturing processes. Since the TaC has high hardness, high strength and highmelting point and has better bond strength with the silver and the nickel, compared with common Ag-Ni materials, the electrical contact material has higher fusion welding resistance as well as electric arc burning loss resistance and longer electric service life and is mainly applied to the contacts of low-voltage electrical power distribution apparatus.

The invention discloses a manufacturing method of a silver tin oxide contact alloy material and a manufactured alloy thereof. The method comprises the following steps: 1.smelting: smelting the ingredients at the preset temperature and continuing to stir in the process of smelting; 2. casting the ingredients into a round spindle and lathing the surface of the round spindle; 3. carrying out hot rolling and then cold rolling on the round spindle and then rolling the round spindle into sheets; 4. carrying out oxygenation processing on the sheets in an internal oxidation furnace; 5. crushing the sheets and then carrying out high energy crushing processing on the crushed sheets; 6. carrying out hot extrusion to obtain a wire stock blank; 7. carrying out drawing processing and annealing treatment; and 8. taking the obtained material as the finished product. The alloy comprises the following components in percentage by weight: 7%-9% of Sn, 1.0%-3.0% of rare earth additive and the balance of Ag. The invention has the advantages of more simplified technique, easy implementation and excellent product performance.

The invention relates to a high-performance silver cadmium oxide material and a manufacturing method thereof, which are characterized in that the silver cadmium oxide material comprises the following components: 85 to 97 percent of silver, 2 to 15 percent of cadmium, 0.01 to 0.5 percent of nickel, 0.01 to 1 percent of tin and 0.01 to 0.5 percent of rear earth mixture. The manufacturing method of the high-performance silver cadmium oxide material is characterized in that: a given quantity of silver, cadmium, nickel, tin and rare earth mixture are measured to be arranged inside a middle-frequency induction furnace to be smelted and cast, the cast ingot is extruded by an extruding machine to be thick wires, the thick wires are stretched by a wire-drawing die to be thin wires, the thin wires are pre-oxidized by an internal oxidization furnace, then the thin wires are cut and preformed and finally is processed and formed. The anti-oxidization performance, electric-arc burning loss resistance and the abrasion resistance of the silver cadmium oxide material are improved, and the service life is prolonged, so the high-performance silver cadmium oxide material can be applied to different working environments, has low production cost, simple manufacturing method and low requirements on the device and the production.

The present invention belongs to metal-based composite material technology. The electric contact material consists of Ag 70-97 wt%, nanometer tin oxide 3-22 wt% and RE elements 0.1-8 wt%. The electric contact is produced through the processes of preparation of zine oxide or titanium oxide doped nanometer tin oxide, mixing metal oxide powder, pressing the mixture to form, sintering, extruding, drawing wire and forming into rivet type or stripe contact. The pressure in pressing the mixture to form is 150-400 MPa and the sintering temperature is 800-900 deg.c. The electric contact can be used in electric appliance, instrument and switch.

The invention relates to a preparation method for a graphene reinforced copper-matrix electrical contact material. The preparation method comprises the steps that 1.0%-5.0% by weight of graphene and 95.0%-99.0% by weight of copper powder are subjected to ball milling for powder mixing and cold press molding, copper is smelted in an intermediate frequency furnace, copper-graphene intermediate alloy is added into molten copper, a composite is prepared through a casting process, and the composite is subjected to stress relief annealing and processing molding. According to the preparation method, graphene reinforcements are added into copper alloy to be used as a framework, so that the material has high hardness, high abrasion resistance, mechanical shock resistance and fusion-welding resistance. By adding rare earth, the oxidation resistance and electric arc burning resistance of the copper-alloy electrical contact material are improved.

The invention discloses a method for preparing a mixed rare-earth oxide modified silver tin oxide electrical contact material, which comprises the following steps of: 1, treating Ag2O powder; 2, preparing alloy melt by alloying Sn, rare-earth element and Ag; 3, preparing a composite material by spray co-deposition; 4, performing in-situ chemical treatment on the composite material; and 5, preparing the mixed rare-earth oxide modified silver tin oxide electrical contact material by extruding, rolling and drawing. The preparation of the mixed rare-earth oxide modified silver tin oxide electrical contact material with short flow, near formation and enforced uniform solidification can be realized by integrating advanced processing technology of spray co-deposition, in-situ chemical reaction and the like. The mixed rare-earth oxide modified silver tin oxide electrical contact material prepared by adopting the method has high welding resistance and arc burning tolerance, and meanwhile has the characteristics of low temperature rise, simple subsequent processing, wide application range, long service life and capability of realizing industrialized production.

The invention discloses a silver-based alloy material and application thereof. The silver-based alloy material can be used as sliding electric contact material for a light and medium load micromotor and improves the hardness and softening temperature of Ag-Cu alloy, thereby improving the electric arc burning resistance, fusion welding resistance and metal transfer resistance of the material and improving the electric contact reliability of the Ag-Cu alloy. Therefore, the material can solve the problems of unstable contact resistance, reduced contact reliability and low hardness and abrasive resistance under higher temperature of the AgCu4 alloy.

The invention discloses a method for manufacturing silver tin oxide indium oxide contact alloy material and a manufactured alloy thereof. The method comprises the following steps of: (1) smelting, namely smelting ingredients at the preset temperature, and continuously stirring in the smelting process; (2) casting into round ingots and turning external surfaces thereof; (3) performing hot rolling and cold rolling to form sheets; (4) performing oxygen-increasing treatment on the sheets in an inner oxidation furnace; (5) crushing and performing high-energy crushing treatment; (6) performing hot extrusion to prepare wire blanks; (7) drawing and annealing; and (8) using the obtained materials as finished products. The alloy comprises the following components in percentage by mass: 5.1 to 6.8 percent of Sn, 1.50 to 3.0 percent of In, 1.50 to 2.50 percent of rare earth additive and the balance of Ag. The method for manufacturing the silver tin oxide indium oxide contact alloy material has the advantages of simplified technology, easy implementation and excellent product performance.

The invention relates to a copper-plated graphene reinforced copper-based electrical contact material and a preparation method thereof. The electrical contact material comprises 0.1-5.0 wt% of copper-plated graphene and 95.0-99.9 wt% of copper-rare earth alloy, and the weight ratio of rare earth in the copper-rare earth alloy accounts for 0.03-2.0%. The preparation method comprises the following steps of graphene copper plating, atomization for powder making, ball milling and power mixing, cold-press forming, sintering, secondary forming and sintering. A copper-plated graphene reinforced body is added into the copper alloy and taken as a framework, so that the material has the advantages of high hardness, high wear resistance, mechanical impact resistant performance and welding resistance; and with the addition of the rare earth, the oxidation resistance and the arc burning resistant capability of the copper alloy electrical contact material are improved.

The invention discloses silver tin oxide electrician contact material and its preparation method. Its chemical composition (weight ratio) is that the SnO2 is from three percent to ten percent; the mixed rare earth oxide (Sm2O3, Gd2O3, Y2O3) is from 0.1 percent to 2.0 percent; the surplus quantity is Ag. The preparation method is that the Ag, Sn, rare earth element are made up according to the alloy design proportion of ingredients, alloying in the vacuum melting furnace; then the AgSnRE is made after quickly solidification. At first the alloy is formed to thread, panel, profiled bar or rivet by extrusion, rolling, drawing, heat treatment. Then it is formed to AgSnO2 mixed rare earth oxide electrician contact material by produce internal operation. It can be used in AC and DC contactor, relay, controller, circuit breaker, switch, and so on.

The invention relates to a graphene reinforced copper-rare earth based electrical contact material and a preparing method thereof. The electrical contact material comprises, by weight, 0.1-3.0% of graphene and 97.0-99.9% of copper-rare earth alloy, and rare earth accounts for 0.05-3.0% of the total weight of copper-rare earth alloy. The preparing method comprises the steps of powder atomization, ball milling and powder mixing, cold press molding, sintering, secondary forming and sintering. By adding a graphene reinforcing body to copper alloy to serve as the framework, the material has high hardness, high wear resistance, high mechanical impact resistance and high welding resistance. By adding rare earth, the oxidation resistance and electric arc erosion resistance of the copper alloy electrical contact material are improved.