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Sliver oxide contact material with base body performance-strengthening additives as well as preparation method and product thereof

A contact material, silver oxide technology, applied in the direction of contacts, electrical components, circuits, etc., can solve problems such as difficult to meet the requirements, achieve the effect of improving wetting, improving arc ablation resistance, and simple process

Active Publication Date: 2014-04-02
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional silver oxide contact materials are difficult to meet the requirements only by changing the type of oxide or changing the composition without solving the properties of the silver matrix.

Method used

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  • Sliver oxide contact material with base body performance-strengthening additives as well as preparation method and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] with AgLa-SnO 2 10 Materials prepared as examples

[0034] 1. 19.98kg of Ag ingot and 0.02kg of Mg were smelted at 1300°C, then water atomized at 1250°C to make powder, the water atomization pressure was 38MPa, and finally the powder was passed through a 200-mesh sieve to obtain AgLa alloy powder;

[0035] 2. 9kg of AgLa powder and 1kg of 3μm SnO 2 Preparation of AgLa-SnO by powder mechanical dry mixing 2 10 powder;

[0036] 3. AgLa-SnO 2 10 powders were made into ingots under a pressure of 180 MPa on a cold isostatic press, and the diameter of the ingots was 85 mm.

[0037] 4. AgLa-SnO 2 10 ingots were sintered under vacuum for 4 hours at a sintering temperature of 850°C.

[0038] 5. AgLa-SnO 2 10 spindles are extruded at 800°C, and the extrusion specification is Φ6.

[0039] 6. AgLa-SnO 2 10. The wire is cold drawn to the required diameter through the cold drawing machine.

[0040] The AgLa-SnO prepared in this example 2 10 The physical properties are as fo...

Embodiment 2

[0042] AgMgNi-SnO 2 In 2 o 3 12 Materials prepared as examples

[0043] 1. 19.98kg of Ag ingot, 0.01kg of Ni sheet, and 0.01kg of Mg ingot were smelted at 1200°C, then water atomized at 1150°C to make powder, and the water atomization pressure was 42MPa, and finally the powder passed through a 200-mesh sieve, Obtain AgMgNi alloy powder;

[0044] 2. 8.8kg of AgMgNi powder and 1.0kg of 4μm SnO 2 Powder, 0.2kg of 5μm In 2 o 3 Preparation of AgMgNi-SnO by powder mechanical dry mixing 2 In 2 o 3 12 powder;

[0045] 3. AgMgNi-SnO 2 In 2 o 3 12 powders were made into ingots under a pressure of 220 MPa on a cold isostatic press, and the diameter of the ingots was 86 mm.

[0046] 4. AgMgNi-SnO 2 In 2 o 312 ingots were sintered under vacuum for 4 hours at a sintering temperature of 860°C.

[0047] 5. AgMgNi-SnO 2 In 2 o 3 12 spindles are extruded at 820°C, and the extrusion specification is Φ6.

[0048] 6. AgMgNi-SnO 2 In 2 o 3 12. The wire is cold drawn to the r...

Embodiment 3

[0051] Taking the preparation of AgCuNi-ZnO10 material as an example

[0052] 1. 19.98kg of Ag ingots, 0.01kg of Cu rods, and 0.01kg of Ni sheets were melted at 1300°C, and then water atomized at 1250°C to make powder. The water atomization pressure was 60MPa, and the final powder passed 200 Mesh sieve, thereby obtain AgCuNi alloy powder;

[0053] 2. Mechanical dry mixing of 9kg of AgCuNi powder and 1kg of 7μm ZnO powder to prepare AgCuNi-ZnO10 powder;

[0054] 3. The AgCuNi-ZnO10 powder is made into an ingot under a pressure of 180 MPa on a cold isostatic press, and the diameter of the ingot is 83 mm.

[0055] 4. The AgCuNi-ZnO10 ingot was sintered under vacuum for 4 hours at a sintering temperature of 800°C.

[0056] 5. The AgCuNi-ZnO10 spindle is extruded at 780°C, and the extrusion specification is 40X4.

[0057] 6. The AgCuNi-ZnO10 strip is rolled and punched to the required specifications through a cold rolling mill.

[0058] The physical properties of the AgCuNi-ZnO...

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Abstract

The invention discloses a preparation method of a sliver oxide contact material with base body performance-strengthening additives and a product thereof. The preparation method comprises the following steps: preparing an additive alloy with strengthening performance, oxide powder, other additive powder and a sliver ingot which are used as raw materials into powder by water atomization, mixing powder, pressing an ingot, sintering, extruding and finally drawing or rolling to prepare a contact material finished product. The sliver oxide contact material disclosed by the invention has a sliver base body with good electrical performance and mechanical performance, oxide particles and other additive materials are uniformly dispersed in the sliver base body, so that the contact material is ensured to have the characteristics of being uniform and stable in electrical performance, good in processing performance, and the like. Compared with the conventional sliver oxide contact material, the material prepared by the process in the invention has higher burning loss resistance, electro-transfer resistance and fusion welding resistance, can satisfy volume miniaturization and performance optimization needs of a low-voltage electrical appliance. Moreover, the process disclosed by the invention is simple and suitable for mass production. The prepared silver oxide product can be widely applied to a relay, a contact and a circuit breaker.

Description

technical field [0001] The invention relates to an electrical contact material and a preparation method, in particular to a silver oxide contact material with an additive for enhancing matrix performance, a preparation method and a product thereof. Background technique [0002] Silver oxide contact materials are most widely used in low-voltage electrical appliances, especially in contactors and relays with medium and high current levels. Conventional silver oxide contact materials exist in the form of a "pseudo-alloy" of pure silver and oxides, and the oxides are dispersed around the pure silver matrix. The more common preparation methods of silver oxide contact materials are internal oxidation process, powder mixing process, powder pre-oxidation process and coating process. These processes all use the addition of oxides to improve the wetting between the silver substrate and tin oxide, such as the following patents: [0003] CN201210335376.9 A composite silver tin oxide e...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10B22F1/00H01H1/0237
CPCC22C32/0021B22F9/082B22F2009/0828B22F2998/10B22F2999/00C22C1/0466H01H1/0237C22C1/1084B22F3/04B22F3/1007B22F2003/208B22F3/18B22F2201/20
Inventor 刘立强颜小芳鲁香粉翁桅柏小平林万焕
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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