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Manufacturing method of copper chromium contact material

A copper-chromium contact and manufacturing method technology, applied in the directions of transportation and packaging, metal processing equipment, etc., can solve the problems of various equipment, complicated procedures, long cycle, etc., and achieve short sintering time, simplified preparation process, and high density. Effect

Active Publication Date: 2018-01-09
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen from the above-mentioned process of preparing the copper-chromium contact material that after the powder mixing is completed, the steps of cold isostatic pressing, vacuum sheathing, heating, and hot extrusion are required to obtain the copper-chromium contact material, and the above-mentioned Each step includes complicated procedures. Such a production process not only has a long cycle and consumes a lot of energy, but also requires a variety of equipment and high costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The manufacturing method of copper-chromium contact material comprises the following steps:

[0025] Step 1, powder mixing: Dilute and disperse the binder SBP glue with solvent oil, add the binder to the mixed powder of chromium powder and copper powder, and mix evenly with a V-blender or a low-speed ball mill; among them, the chromium powder The content is 25wt.%, the rest is copper, the proportion of adding solvent oil is 2% of the weight of chromium powder, the proportion of adding binder is 1% of the weight of chromium powder, the particle size of the chromium powder is 10 μm, the copper The particle size of powder is 0.8μm;

[0026] Step 2, sieving and dispersing: sieve the mixed powder processed in step 1 through a sieve and place it in a container to disperse and dry;

[0027] Step 3, pre-sintering: pour the mixed powder obtained in step 2 into a graphite mold, at 1 ton / cm 2 Molding is carried out under a certain pressure, and the temperature is set at 650°C du...

Embodiment 2

[0032] The manufacturing method of copper-chromium contact material comprises the following steps:

[0033] Step 1, powder mixing: Dilute and disperse the binder SBP glue with solvent oil, add the binder to the mixed powder of chromium powder and copper powder, and mix evenly with a V-blender or a low-speed ball mill; among them, the chromium powder The content is 37.5wt.%, the rest is copper, the proportion of adding solvent oil is 3% of the weight of chromium powder, the proportion of adding binder is 1.5% of the weight of chromium powder, the particle size of the chromium powder is 20 μm, the The particle size of copper powder is 5.4μm;

[0034] Step 2, sieving and dispersing: sieve the mixed powder processed in step 1 through a sieve and place it in a container to disperse and dry;

[0035] Step 3, pre-sintering: pour the mixed powder obtained in step 2 into a graphite mold at 2.4 tons / cm 2 Molding is carried out under a certain pressure, and the temperature is set to 72...

Embodiment 3

[0040] The manufacturing method of copper-chromium contact material comprises the following steps:

[0041] Step 1, powder mixing: Dilute and disperse the binder SBP glue with solvent oil, add the binder to the mixed powder of chromium powder and copper powder, and mix evenly with a V-blender or a low-speed ball mill; among them, the chromium powder The content is 50wt.%, the rest is copper, the proportion of adding solvent oil is 4% of the weight of chromium powder, the proportion of adding binder is 2% of the weight of chromium powder, the particle size of the chromium powder is 30 μm, the copper The particle size of the powder is 10 μm;

[0042] Step 2, sieving and dispersing: sieve the mixed powder processed in step 1 through a sieve and place it in a container to disperse and dry;

[0043] Step 3, pre-sintering: pour the mixed powder obtained in step 2 into a graphite mold, at 3.8 tons / cm 2 Molding is carried out under a certain pressure, and the temperature is set to 8...

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Abstract

The invention discloses a method for making a copper-chromium contact material. In step 1, a binder is added to the mixed powder of chromium powder and copper powder and mixed uniformly; in step 2, the mixed powder processed in step 1 is passed through a sieve. After sieving, put it in a container to disperse and dry it; step 3, pour the mixed powder obtained in step 2 into a graphite mold, and mold it to obtain a molded product. Raise the temperature to 1000-1060°C, keep it warm for 1.5-3.5 minutes, and then cool down; step 4, continue to place the porous sintered product obtained in step 3 in the SPS sintering furnace to evacuate and pressurize, when the pressure reaches 25-35MPa, pass through Pulse direct current and heat up to 1100‑1200 ° C, after 1.5‑3.5 min of heat preservation, obtain the copper-chromium contact material of secondary sintering; step 5, place the copper-chromium contact material of secondary sintering obtained in step 4 in 1200- In the temperature range of 1600°C, heat preservation in vacuum or inert gas protection for 1-20 hours. The production method of the invention has the advantage of shortening the production cycle.

Description

technical field [0001] The invention relates to the technical field of preparation of electrical contact materials, in particular to a method for manufacturing copper-chromium contact materials. Background technique [0002] Contact materials are widely used in automatic switches, large-capacity circuit breakers, molded case circuit breakers and other switches. The invention patent application with the publication number CN105018768A discloses a preparation method of a high-performance copper-chromium contact material. The preparation method includes the following steps: (1) Selection of raw materials: select 50-300 micron electrolytic chromium powder or thermite reduced chromium powder and electrolytic copper powder or atomized copper powder below 300 microns; (2) mixed powder: according to the weight ratio of Cu powder: Cr powder = 9:1-5:5, and according to the mixed powder of Cu powder and Cr powder : Copper balls=1:1 weight ratio for ball milling and mixing powder for 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04B22F3/14B22F3/105
CPCC22C1/0425C22C9/00B22F3/105B22F3/1208B22F3/14B22F2003/1051B22F2998/10B22F2999/00B22F1/10B22F2003/248B22F3/02
Inventor 王小军艾璇王文斌师晓云李刚徐润生
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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