A production process of silver and cadmium oxide with coarse and fine particles combined with internal oxidation method

A production process, a technology of silver cadmium oxide, applied in the field of coarse and fine particles with internal oxidation method of silver cadmium oxide production process, can solve the problems of low elongation, material transfer resistance is not as good as coarse particle oxide, high material resistivity, and achieve performance The effect of improving the comprehensive application level of materials

Active Publication Date: 2018-03-20
佛山市诺普材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxide particles are finer, which leads to high resistivity and high hardness of the material, low elongation, and the transfer resistance of the material is not as good as that of coarse-grained oxides, and it is easy to crack during processing and upsetting.

Method used

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  • A production process of silver and cadmium oxide with coarse and fine particles combined with internal oxidation method
  • A production process of silver and cadmium oxide with coarse and fine particles combined with internal oxidation method
  • A production process of silver and cadmium oxide with coarse and fine particles combined with internal oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for making a silver-cadmium oxide alloy material, comprising the steps of:

[0032] (1) Place the silver cadmium oxide composition in an intermediate frequency induction melting furnace in proportion to smelt and cast ingots; the mass fraction percentages of each element in the silver cadmium oxide composition are: silver 90.295%, cadmium 8%, indium 1%, tin 0.005%, Antimony 0.1%, Tellurium 0.1%, Nickel 0.4%, Copper 0.1%;

[0033] (2) After the surface of the cast ingot is turned and cleaned, it is heated to 750 degrees Celsius and extruded into a silver-cadmium alloy wire rod, drawn to 2.0mm, and cut into 1-5cm line segments;

[0034] (3) Put the wire rod into the internal oxidation furnace for oxidation, oxygen pressure: 0.3mpa, heat preservation at 700 degrees Celsius for 5 hours, high temperature section: heat preservation at 880 degrees Celsius for 18 hours;

[0035] (4) After the wire rod is oxidized out of the furnace, it is cleaned and polished, and aft...

Embodiment 2

[0038] A method for making a silver-cadmium oxide alloy material, comprising the steps of:

[0039] (1) Place the silver cadmium oxide composition in an intermediate frequency induction melting furnace in proportion to smelt and cast ingots; the mass fraction percentages of each element in the silver cadmium oxide composition are: silver 88.295%, cadmium 8%, indium 3%, tin 0.005%, Antimony 0.1%, tellurium 0.1%, nickel 0.2%, copper 0.3%.

[0040] (2) After the surface of the cast ingot is turned and cleaned, it is heated to 750 degrees Celsius and extruded into a silver-cadmium alloy wire rod, drawn to 2.0mm, and cut into 1-5cm line segments;

[0041] (3) Put the wire rod into the internal oxidation furnace for oxidation, oxygen pressure: 0.5mpa, heat preservation at 650 degrees Celsius for 3 hours, high temperature section: heat preservation at 800 degrees Celsius for 22 hours;

[0042] (4) After the wire rod is oxidized out of the furnace, it is cleaned and polished, and aft...

Embodiment 3

[0045] A method for making a silver-cadmium oxide alloy material, comprising the steps of:

[0046] (1) Place the silver cadmium oxide composition in an intermediate frequency induction melting furnace in proportion to smelt and cast ingots; the mass fraction percentages of each element in the silver cadmium oxide composition are: silver 85.295%, cadmium 13.9%, indium 0.1%, tin 0.005%, Antimony 0.1%, tellurium 0.1%, nickel 0.4%, copper 0.1%.

[0047] (2) After the surface of the cast ingot is turned and cleaned, it is heated to 750 degrees Celsius and extruded into a silver-cadmium alloy wire rod, drawn to 2.0mm, and cut into 1-5cm line segments;

[0048] (3) Put the wire rod into the internal oxidation furnace for oxidation, oxygen pressure: 0.3mpa, heat preservation at 600 degrees Celsius for 5 hours, high temperature section: heat preservation at 850 degrees Celsius for 20 hours;

[0049](4) After the wire rod is oxidized out of the furnace, it is cleaned and polished, and...

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PUM

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Abstract

The invention discloses a manufacturing process of silver-cadmium oxide with an internal oxidation method by matching coarse and fine particles. The manufacturing process comprises the following steps of (1) proportionally putting silver-cadmium oxide components in a medium frequency induction melting furnace for melting and ingot casting; (2) cleaning the surfaces of the cast ingots by turning, then heating and extruding into silver-cadmium alloy wires, drawing, and cutting into segments; (3) putting the segments in an internal oxidation furnace for oxidation in an oxygen atmosphere, performing low-temperature oxidation first, and then performing high-temperature oxidation in an oxidation process; (4) cleaning and polishing the segments which are oxidized and discharged, drying, then pressing into round ingots, and heating and extruding the round ingots into wires in an air furnace; (5) drawing the wires, and performing annealing treatment, so as to obtain finished products of the wires. In the oxidation process, the low-temperature oxidation is combined with the high-temperature oxidation, and the coarse and fine oxide particles are matched and mixed, so that the problem of insufficient material malleability caused by superfineness of the oxide particles is solved, and the comprehensive application level of materials is increased.

Description

technical field [0001] The invention relates to the technical field of manufacturing electric contact materials, and more specifically, relates to a silver cadmium oxide production process with coarse and fine particles combined with internal oxidation method. Background technique [0002] In the prior art, the silver-cadmium oxide alloy material adopts constant temperature and oxidation pressure to form silver oxide with a single particle size composition under a specified oxidation time, and the volume fraction of oxides with a particle size of 1-2 microns exceeds 95%. The finer oxide particles make the material have higher resistivity, higher hardness, and lower elongation. The transfer resistance of the material is not as good as that of coarse-grained oxides, and it is easy to crack during machining. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a silver cadmium oxide material with low resistivity and exce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/10C22C1/10C22C32/00C22F1/14
CPCC22C1/1078C22C5/10C22C32/0021C22F1/14
Inventor 谢云王永业王乃千凌均谷
Owner 佛山市诺普材料科技有限公司
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