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agwc(t)/cuc(x) contact material and preparation method thereof

A technology of contact materials and sheet materials, applied in the direction of conductive materials, conductive materials, manufacturing tools, etc., can solve the problems of material toughness decline, unreliability, cracking, etc.

Active Publication Date: 2022-02-11
哈尔滨东大高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of contact materials has been accompanied by the implementation of various silver saving methods, the most common of which is the use of silver alloy / copper composites to save silver, generally more than 50% of silver can be saved, but when the silver alloy layer is ablated by the arc Finally, the copper layer has become an unreliable factor due to its lack of welding resistance, so it is almost impossible to use silver alloy / copper composite contacts for circuit breaker contacts
CuC alloy, the addition of high melting point C (its melting point exceeds 3000°C) can improve the welding resistance of the Cu matrix. The higher the C content, the stronger the welding resistance, but at the same time, the high content of C will cause the toughness of the material to decrease. The deformation of the hot-rolled composite is greater than 50%, and the low-toughness CuC will crack, and the hot-rolled composite with the silver alloy layer cannot be realized

Method used

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  • agwc(t)/cuc(x) contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of AgWC25Ni0.1 / CuC0.5Se0.1, its metallographic diagram is as follows figure 2 shown.

[0046] 1. AgWC(T) mixed powder: 25Kg of WC powder with an average particle size of 1μm, 0.1Kg of -200 mesh Ni powder, and 37.4Kg of -200 mesh silver powder are mixed by ball milling. The mixing time is 4 hours, and the ball-to-material ratio is 5:1.

[0047] 2. AgWC(T) pressing: press the mixed silver alloy powder into 70×300×6 sheets, and each sheet weighs 0.908Kg.

[0048] 3. AgWC(T) sintering: the silver alloy sheet was sintered at 700°C for 1 hour in an ammonia decomposition gas atmosphere.

[0049] 4. AgWC(T) infiltration: place a 0.533Kg silver plate in a graphite burning boat, place the sintered sheet on it, infiltrate it in an ammonia decomposition gas atmosphere at 1050°C for 0.5h, and then cool it to room temperature.

[0050] 5. AgWC(T) hot rolling: under the protection of argon, the infiltrated silver plate is heated to 750°C, hot rolled, and rolled to 4mm. ...

Embodiment 2

[0067] Prepare AGWC60FE2 / CUC4LA1

[0068] 1. AGWC (T) mixed powder: Mix the average 60kg granularity of 3 μm, -200 mesh Fe powder 2kg, -200 mesh silver powder 19kg ball grinding, the mixed time is 4 hours, and the ball ratio is 5: 1.

[0069] 2. AGWC (T) pressing: Mixed silver alloy powder after mixed with 70 × 300 × 1.5 board, each plate weight is 0.33kg.

[0070] 3. AGWC (T) sintering: Silver alloy plates sintering for 1h in an ammonia decomposition at 900 ° C.

[0071] 4. AGWC (T) melting: Place the silver plate of 0.083kg in the graphite boat, place the sintering plates on it, and cooled to room temperature after melting 0.2h in the atmosphere of 1050 ° C.

[0072] 5. AGWC (T) hot rolling: Heat the silver plate after melting seepage under the protection of the air, heat the silver plate 750 ° C, hot rolled, rolled to 1mm.

[0073] 6. AGWC (T) Sand spray: Sand spray on silver alloy plates to make the surface crude.

[0074] 7. CUC mixed powder: Mix the average 4kg partic...

Embodiment 3

[0089] Preparation of AgWC30Co0.5 / CuC2Te0.25Al0.25

[0090] 1. AGWC (T) Mixed powder: Mix the 30kg of WC powder with an average particle size of 0.8 μm, -200 mesh CO powder 0.5kg, and -200 mesh silver powder 34.5kg of the ball. The mixing time is 3 hours and the ball ratio is 3: 1.

[0091] 2. AGWC (T) pressing: Mixed silver alloy powder after mixed to 70 × 300 × 3 plates, each plate weight is 0.477kg. Following Quality: The first step: Calculate the density ratio of the corresponding ingredient, AGWC30, calculate the density of about 11.6468; Step 2: Determine the size of the suppression plate and calculate the volume. The size of the board is 70 × 300 × 3mm, the volume is 63 cubic centimeters; the third step: the total weight of the finished product: 63 × 11.6468 = 733.75 grams; the fourth step: the weight of the melting and seepage silver: (Total weight* Silver content) / 2, for example: 733.75 × 0.7 / 2 = 256.8 grams; Step 5: Calculate the weight of the pressure plate: total ...

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Abstract

The invention provides an AgWC(T)CuC(X) contact material for a circuit breaker and a preparation method thereof. The contact material has a silver alloy layer and a copper alloy layer. The silver alloy layer is calculated by weight percentage, and its composition is: tungsten carbide: 25‑60%; T additive: 0.1‑2%; Ag: balance, T additive is One or several of Fe, Co, Ni are mixed in any proportion; the copper alloy layer is calculated by weight percentage, and its composition is: carbon: 0.5‑4%; X additive: 0.1‑1%; Cu: balance, X The additive is one or more of Al, Zr, La, Ce, Se, Te, Bi, Ti mixed in any proportion. The preparation method adopts the infiltration method respectively, followed by argon arc welding and edge sealing and hot rolling. The invention not only maintains the arc ablation resistance of AgWC, but also prevents welding when the AgWC is completely ablated by the arc, and achieves the purpose of saving silver on the basis of safety and reliability.

Description

technical field [0001] The invention relates to the field of manufacturing a contact material for electrical appliances, in particular to an AgWC(T) / CuC(X) contact material and a preparation method thereof. Background technique [0002] Contacts are the core components of low-voltage electrical appliances, which play the role of connecting, carrying and breaking current. The development of contact materials has been accompanied by the implementation of various silver saving methods, the most common of which is the use of silver alloy / copper composites to save silver, generally more than 50% of silver can be saved, but when the silver alloy layer is ablated by the arc Finally, the copper layer has become an unreliable factor due to its lack of welding resistance, so it is almost impossible to use silver alloy / copper composite contacts for circuit breaker contacts. CuC alloy, the addition of high melting point C (its melting point exceeds 3000°C) can improve the welding resis...

Claims

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Application Information

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IPC IPC(8): B22F7/02B22F3/02B22F3/04B22F3/10B22F3/18B22F3/20B22F3/24B22F3/26B22F9/04C21D9/00C22C5/06C22C9/00C22C29/08C22C32/00C22F1/08C22F1/14H01B1/02
CPCB22F7/02B22F3/02B22F3/1007B22F9/04B22F3/26B22F3/18B22F3/04B22F3/20C21D9/0081C22F1/14C22F1/08C22C5/06C22C9/00C22C32/0052C22C29/08C22C29/067B22F3/24H01B1/02H01B1/026B22F2009/043B22F2003/248
Inventor 杨丛涛
Owner 哈尔滨东大高新材料股份有限公司