Tungsten-copper composite electric contact material and preparation method thereof

A technology of contact materials and copper electricity, which is applied in the direction of conductive materials, conductive materials, welding/cutting media/materials, etc., can solve the problem of increasing demand for tungsten-clad copper contact materials, welding adhesion failure, difficult product size consistency, etc. problems, to achieve the effect of improving the yield rate of materials, solving large size differences, and ensuring product size consistency

Active Publication Date: 2019-07-30
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tungsten-clad copper rivet-type contact materials are widely used in car horns. Due to the high-frequency on-off and closing operations of car horns, conventional silver-based or copper-based electrical contact materials are prone to failure in the early stage of fusion welding during use, resulting in the failure of the horn to produce sound. , and due to its high melting point and high hardness, tungsten materials can maintain a certain contact area stably during use, so welding is not easy to occur, so it is widely used in automotive horn contact materials, but due to the poor processing performance of tungsten contacts and welding The performance is poor, and it is impossible to fix the tungsten contact on the electrical contact bridge by spot welding or riveting, which is conventionally used for silver-based contact materials. The conventional solution is to use a single-point furnace brazing process to prepare a welded tungsten-clad copper rivet. Type contacts, but due to the poor process stability of brazing in the furnace, it is difficult to achieve product size consistency
[0003] With the continuous growth of China's domestic car ownership, the contact materials for car horns are also getting higher and higher. The original process of making tungsten-clad copper rivets by brazing in a single-point furnace cannot meet high dimensional accuracy and automated mass production.
At the same time, LED lamps are widely used in household appliances. In terms of the high-current impact performance of LED lamps, conventional silver-based or copper-based contact materials cannot meet the requirements. It has been verified that the use of tungsten arc contacts can meet the requirements, which is bound to further increase the demand for tungsten-clad copper. Contact Material Requirements

Method used

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  • Tungsten-copper composite electric contact material and preparation method thereof
  • Tungsten-copper composite electric contact material and preparation method thereof
  • Tungsten-copper composite electric contact material and preparation method thereof

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preparation example Construction

[0037] A kind of preparation method of tungsten clad copper electric contact material, its raw material comprises tungsten strip material, BAg72Cu strip material and copper strip material, and the widths of the tungsten strip material, BAg72Cu strip material and copper strip material top surface are the same;

[0038] The preparation method comprises the following steps:

[0039] Remove impurities on the surface of raw materials;

[0040] Continuous brazing composite: stack and position the tungsten strip, BAg72Cu strip and copper strip in sequence, so that the tungsten strip, BAg72Cu strip and copper strip are aligned in the width direction and closely bonded, and heated to make the tungsten strip and the copper strip Continuous brazing and compounding of copper strips to obtain tungsten-clad copper strips;

[0041] The tungsten-copper-clad strip is shaped and dot-processed to obtain the above-mentioned tungsten-copper-clad electrical contact material.

[0042] The embodime...

Embodiment 1

[0057] In this example, W / Cu material T-shaped sheet is prepared, and the specific steps are as follows:

[0058] 1. Purchase of tungsten strips: tungsten strips with specifications of 4mm×0.5mmR×L, prepare tungsten strips 3;

[0059] 2. Preparation of T-shaped copper strip: prepare a right-angled T-shaped TU1 copper strip with a specification of 4mm×0.5mm+2mm×1mm by profile rolling process, and prepare special-shaped copper strip 2;

[0060] 3. Preparation of brazing material strip: BAg72Cu brazing material strip is rolled to a thickness of 0.05±0.01mm, and then slit into a 4mm wide strip on precision slitting equipment, and BAg72Cu brazing material strip 1 is prepared;

[0061] 4. Cleaning before strip brazing: degrease and clean the surfaces of BAg72Cu solder strip 1, special-shaped copper strip 2, and tungsten strip 3;

[0062] 5. Continuous brazing compound: First, customize the upper platen 8 of the openable pressure device, and the lower platen 9 of the openable pressu...

Embodiment 2

[0068] This embodiment prepares W / Cu / BAg15CuP profile sheet, the specific steps are as follows:

[0069] 1. Purchase of tungsten strips: tungsten strips with specifications of 3mm×0.5mmR×L, prepare tungsten strips 3;

[0070] 2. Preparation of profiled copper strips: use the profiling process to prepare 3mm×0.5mm TU1 copper profiles with convex ribs, and prepare special-shaped copper strips 2;

[0071] 3. Preparation of solder strips and solder strips: BAg72Cu solder strips are rolled to a thickness of 0.05±0.01mm, then slit into 3mm wide strips on precision slitting equipment, and ready. BAg72Cu solder strips 1; BAg15CuP solder strips The material is purchased with a thickness of 0.03±0.01mm, and then longitudinally cut into a 3mm wide strip, and the BAg15CuP solder strip 202 is prepared.

[0072] 4. Cleaning before strip brazing: degrease and clean the surfaces of BAg72Cu brazing material strip 1, special-shaped copper strip 2, and tungsten strip 3;

[0073] 5. Continuous ...

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Abstract

The invention discloses a tungsten-copper composite electric contact material and a preparation method thereof and belongs to the technical field of composite materials. The preparation method solvesthe problems that the preparation efficiency of electric contact materials is low and the sizes are not uniform at present. The tungsten-copper composite electric contact material is prepared from rawmaterials including tungsten strips, BAg72Cu strips and copper strips, wherein the top surfaces of the tungsten strips, the BAg72Cu strips and the copper strips are the same in width. The preparationmethod comprises steps as follows: impurities on surfaces of the raw materials are removed; one tungsten strip, one BAg72Cu strip and one copper strip are sequentially stacked and positioned so as tobe aligned in the width direction and closely laminated, then the tungsten strip, the BAg72Cu strip and the copper strip are heated so that the tungsten strip and the copper strip are subjected to continuous brazing to be compounded, and a tungsten-copper composite strip is obtained; the tungsten-copper composite strip is shaped and sawed into pieces, and the tungsten-copper composite electric contact material is obtained. With the adoption of the preparation method, the production efficiency is improved, and size uniformity of products is guaranteed.

Description

technical field [0001] The application relates to the technical field of composite materials, in particular to a tungsten-copper-clad electrical contact material and a preparation method thereof. Background technique [0002] Tungsten-clad copper rivet-type contact materials are widely used in car horns. Due to the high-frequency on-off and closing operations of car horns, conventional silver-based or copper-based electrical contact materials are prone to failure in the early stage of fusion welding during use, resulting in the failure of the horn to produce sound. , and due to its high melting point and high hardness, tungsten materials can maintain a certain contact area stably during use, so welding is not easy to occur, so it is widely used in automotive horn contact materials, but due to the poor processing performance of tungsten contacts and welding The performance is poor, and it is impossible to fix the tungsten contact on the electrical contact bridge by spot weldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00H01B5/02
CPCB23P15/00H01B5/02H01B1/026B32B15/01C22F1/08B23K35/3006B23K35/0233
Inventor 刘立强刘映飞胡杰陈松扬姚培建祖玉涛曾海波刘占中魏庆红
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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