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A kind of preparation technology of silver metal oxide electrical contact material

A technology of contacting materials and oxide electricity, applied in contacts, circuits, electrical switches, etc., can solve the problems of long production cycle, many processes, low material utilization rate, etc., to achieve short production cycle, improve consistency and reliability , the effect of high material utilization

Active Publication Date: 2020-06-05
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a silver metal oxide in order to overcome the disadvantages of low material utilization rate, long production cycle, numerous procedures, and oxide-poor regions in the process of preparing silver metal oxide wire rods by traditional internal oxidation process. Preparation process of electrical contact materials

Method used

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  • A kind of preparation technology of silver metal oxide electrical contact material
  • A kind of preparation technology of silver metal oxide electrical contact material
  • A kind of preparation technology of silver metal oxide electrical contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) Melting 22.200kg Ag, 2.750kg Cd, and 0.050kg Ni to form an alloy melt;

[0037] b) Preparing AgCd alloy sphere particles using a metal bead-scattering machine and drying them;

[0038] c) AgCd alloy sphere screening size range 0.5 ~ 5mm;

[0039] d) The grading standard for alloy spheres is that every 0.5mm increase in diameter is a grade, and the alloy spheres with diameters within the range of 0.5-5mm are divided into 9 grades;

[0040] e) The oxidation temperature of the alloy sphere is 600°C, the oxidation pressure is 0.60 MPa, and the oxidation time refers to the following table according to the particle classification:

[0041]

[0042] f) the oxidized silver metal oxide spheres are combined into ingots and sintered;

[0043] g) The spindle extrudes the wire rod with a specification of Φ6mm, and then draws it to the finished product specification.

Embodiment 2

[0045] a) Melt 22.500kgAg, 1.575kgSn, 0.825kgIn, 0.050kg Bi, 0.025kg Te, 0.025kgCo to form alloy melt;

[0046] b) using a metal sphere forming machine to prepare AgSnIn alloy sphere particles and drying them;

[0047] c) AgSnIn alloy sphere screening size range 0.5 ~ 5mm;

[0048]d) The grading standard for alloy spheres is that every 0.5mm increase in diameter is a grade, and the alloy spheres with diameters within the range of 0.5-5mm are divided into 9 grades;

[0049] e) The oxidation temperature of the alloy sphere is 550°C, the oxidation pressure is 1.50MPa, and the oxidation time refers to the following table according to the particle classification:

[0050]

[0051] f) the oxidized silver metal oxide spheres are combined into ingots and sintered;

[0052] g) The spindle extrudes thicker gauge wire and then draws it to finished gauge.

Embodiment 3

[0054] a) Melting 21.912kgAg, 3.000kgCu, 0.025kgSb, 0.013kgAl, 0.050kgNi to form alloy melt;

[0055] b) using a metal granulator to prepare AgCu alloy sphere particles and drying them;

[0056] c) AgCu alloy sphere screening size range 0.5 ~ 5mm;

[0057] d) The alloy sphere classification standard is that every 0.5mm increase in diameter is a grade, and the alloy sphere with a diameter within the range of 0.5-5mm is divided into 9 grades

[0058] e) The oxidation temperature of the alloy sphere is 780°C, the oxidation pressure is 0.30MPa, and the oxidation time refers to the following table according to the particle classification:

[0059]

[0060] f) the oxidized silver metal oxide spheres are combined into ingots and sintered;

[0061] g) The spindle extrudes thicker gauge wire and then draws it to finished gauge.

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Abstract

The invention discloses a preparation process of a silver metal oxide electrical contact material, comprising the following steps: (1) melting silver, metal component additives, and other additives to form an alloy melt; (2) using the alloy melt Made into alloy spheres; (3) Dry the alloy spheres; (4) Screen the alloy spheres with a diameter of 0.5-5mm; (5) Classify the alloy spheres according to the increase of 0.5mm in diameter; (6) After grading The alloy spheres are internally oxidized under the set temperature, pressure, and time conditions; (7) The oxidized alloy spheres are combined and pressed into ingots; (8) The ingots are sintered and extruded into thicker silver metal oxide wires; ( 9) The silver metal oxide wire is drawn to the finished product specification. The advantages of this process are high material utilization rate, less process, short production cycle, and no oxide-poor region.

Description

technical field [0001] The invention belongs to the field of electrical contact materials, in particular to a preparation process of silver metal oxide electrical contact materials. Background technique [0002] In the field of electrical contacts, silver metal oxide materials occupy an important position in the entire electrical contact material system due to their comprehensive electrical properties such as excellent arc erosion resistance, welding resistance, and low and stable contact resistance. There are three most common preparation processes for silver metal oxide wires, which are internal oxidation process, pre-oxidation process and powder metallurgy process. [0003] The traditional internal oxidation process flow is as follows: [0004] Alloy smelting—spindle turning—extrusion—wire drawing—internal oxidation—punching—ingot pressing—sintering—extrusion—wire drawing—finished product. The brief description of its production process is as follows: silver, metal and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F1/00B22F5/12H01H1/0237C22C5/06C22C32/00
Inventor 万岱缪仁梁姚培建张海金妹鲁香粉张秀芳郭义万宋林云林应涛陈开松
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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