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Silver metal oxide inlaid composite strip and preparation method thereof

A composite tape and oxide technology, which is applied in the direction of cable/conductor manufacturing, contacts, electrical components, etc., can solve the problems of low bonding strength, waste of precious metal materials, and cracks on the lateral bonding surface, so as to enhance the effect of atomic diffusion , Improved bonding strength, improved wettability

Pending Publication Date: 2022-05-17
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at the two lateral bonding surfaces between the silver metal oxide material and the copper-based material perpendicular to the working surface, the bonding strength is low due to the following two reasons. One is that the silver metal oxide and the copper-based material The wettability between them is very poor; another aspect is that during the hot-rolling cladding process, the rolling force is perpendicular to the working surface, and there is not enough bonding between the two lateral bonding surfaces between the silver metal oxide material and the copper-based material. The rolling component force and the amount of deformation create a sufficiently small atomic distance between the two materials, so the degree of atomic diffusion is limited
[0004] Due to the above two reasons, when silver metal oxide materials and copper-based materials are used to prepare inlaid composite strips, the bonding strength of the lateral bonding surface between silver metal oxide materials and copper-based materials is low, and some inlaid composite strips In the subsequent processing and assembly process, bending deformation is required. When the designed bending deformation area is located near the lateral bonding surface between the silver metal oxide material and the copper-based material, cracks will inevitably occur on the lateral bonding surface , affecting the normal use of the mosaic composite strip
The conventional solution is to increase the width of the silver metal oxide material layer on the surface of the inlaid composite strip, so that the lateral bonding surface avoids the bending position. Because the influence range of the bending area is large, it is usually necessary to increase the width of the silver metal oxide layer. The width of the object material layer, the newly increased width does not produce any beneficial effect in the actual electrical contact process, resulting in waste of precious metal materials

Method used

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  • Silver metal oxide inlaid composite strip and preparation method thereof
  • Silver metal oxide inlaid composite strip and preparation method thereof
  • Silver metal oxide inlaid composite strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a) adopt powder metallurgy process to prepare silver tin oxide powder, adopt atomization process to prepare pure silver powder, tin oxide accounts for 17wt% in the silver tin oxide powder;

[0036]b) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with a core layer of silver tin oxide and a surface layer of pure silver. The thickness of the pure silver layer in the billet is 5% of the diameter of the entire coated billet;

[0037] c) The coated ingot is sintered in an air atmosphere, the sintering temperature is 930°C, and the sintering time is 4h;

[0038] d) The sintered coated ingot is re-pressed and shaped to obtain a regular and denser coated ingot;

[0039] e) After repressing, the coated ingot is heat...

Embodiment 2

[0047] a) adopt pre-oxidation process to prepare silver tin oxide powder, adopt atomization process to prepare pure silver powder, tin oxide accounts for 10wt% in the silver tin oxide powder;

[0048] b) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with a core layer of silver tin oxide and a surface layer of pure silver. The thickness of the pure silver layer in the billet is 2% of the diameter of the entire coated billet;

[0049] c) The coated ingot is sintered in an air atmosphere, the sintering temperature is 850°C, and the sintering time is 12h;

[0050] d) After sintering, the coated ingot is re-pressed and shaped to obtain a regular and denser coated ingot; e) After re-pressed, the coated ingot is heated a...

Embodiment 3

[0058] a) adopt pre-oxidation process to prepare silver zinc oxide powder, adopt atomization process to prepare pure silver powder, zinc oxide accounts for 15wt% in silver zinc oxide powder;

[0059] b) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with a core layer of silver zinc oxide and a surface layer of pure silver. The thickness of the pure silver layer in the billet is 3% of the diameter of the entire coated billet;

[0060] c) The coated ingot is sintered in an air atmosphere, the sintering temperature is 880°C, and the sintering time is 8h;

[0061] d) After sintering, the coated ingot is re-pressed and shaped to obtain a regular and denser coated ingot; e) After re-pressed, the coated ingot is heated at...

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Abstract

The preparation method comprises the following steps: preparing a special-shaped strip with a trapezoidal cross section by taking a silver metal oxide composite silver core-spun wire as a raw material, grinding to remove a silver layer on the lower bottom surface of the trapezoidal cross section, and matching with a copper-based strip with a slotted trapezoidal groove, so as to prepare the silver metal oxide embedded composite strip. And the silver metal oxide inlaid composite strip is prepared after hot rolling compounding. According to the invention, the bonding strength between the silver metal oxide and the copper-based material can be effectively improved, especially the bonding strength of the bonding interface between the silver metal oxide of the vertical working surface of the inlaid composite strip and the copper-based material, and the interface is prevented from cracking in the bending forming process.

Description

technical field [0001] The invention belongs to the field of electrical contact materials, in particular to a silver metal oxide inlaid composite strip and a preparation method thereof. Background technique [0002] Silver-based inlaid composite strip is a special electrical alloy material prepared by rolling composite technology after slotting the copper-based strip as the matrix material and silver-based material as the working layer. It is widely used in Protectors, miniature relays, tact switches, wall switches and other fields. In the silver-based inlaid composite strip, the number of silver-based materials on the copper-based strip can be one or more. The silver-based materials mainly include silver, silver-nickel, silver metal oxide, etc., among which silver metal oxide The material is widely used in silver-based inlaid composite strips due to its good anti-welding performance and anti-burning performance. [0003] In the prior art, there are two common methods for ...

Claims

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Application Information

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IPC IPC(8): H01H11/04H01H1/0237H01B13/00
CPCH01H11/04H01H1/0237H01B13/0036
Inventor 万岱罗宝峰缪仁梁申志刚俎玉涛曾海波刘占中宋林云
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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