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A preparation method of uniformly coated copper-clad iron composite powder

A technology of copper-clad iron and composite powder, which is used in transportation and packaging, metal processing equipment, coating, etc., can solve the problems of easy segregation in mixing and uneven copper-coated iron powder, and achieve uniform copper-coated iron powder. , strong anti-oxidation ability, good repressive effect

Inactive Publication Date: 2018-06-12
廖川金
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: in the preparation of copper-clad iron composite powder, due to the difference in bulk density between copper powder and iron powder, segregation is easy to occur during mixing, resulting in uneven copper-coated iron powder, and a new method is provided. A method for preparing uniformly coated copper-clad iron composite powder. The present invention takes iron powder and adds it to sensitizing solution for sensitization, then adds it into the activation solution for activation to obtain activated iron powder, and then takes disodium edetate and copper sulfate Solution, hydrazine solution and other materials are mixed to prepare copper sulfate coating solution. Using reduction method, hydrazine is used as reducing agent to reduce copper sulfate to copper powder and evenly coat the activated iron powder to obtain a uniformly coated copper-clad iron. compound powder method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] First weigh 5g of iron powder, add it to the sensitizing solution at a solid-to-liquid ratio of 1:5, soak for 15 minutes, then filter with suction to get the filter residue, add the filter residue to the activation solution at a solid-to-liquid ratio of 1:8, stir and mix for 15 minutes, and then filter with suction Get the iron powder after activation, standby; Described sensitizing solution is to be dissolved in 800mL mass fraction 5% hydrochloric acid solution by 5g stannous chloride, mixes; Described activation solution is to be obtained by 6g nickel chloride, 6g Sodium hypophosphite, 130mL of absolute ethanol and 210mL of deionized water were stirred and mixed for 10 minutes to prepare; then 20g of disodium edetate and 1g of cetyltrimethylammonium bromide were added to a 500mL beaker , 0.1g tartaric acid and 200mL distilled water, stir and mix evenly, add 100mL mass fraction 25% copper sulfate solution, stir for 15min, then adjust the pH to 7.5 with mass fraction 28%...

example 2

[0018]First weigh 8g of iron powder, add it to the sensitizing solution at a solid-to-liquid ratio of 1:5, soak for 18 minutes, then filter with suction to obtain a filter residue, add the filter residue to the activation solution at a solid-to-liquid ratio of 1:8, stir and mix for 18 minutes, and then filter with suction Obtain the iron powder after the activation, for subsequent use; Described sensitizing solution is to be dissolved in 900mL mass fraction 8% hydrochloric acid solution by 8g stannous chloride, mixes; Described activation solution is to be obtained by 7g nickel chloride, 7g Sodium hypophosphite, 140mL of absolute ethanol and 220mL of deionized water were stirred and mixed for 13 minutes to prepare; then 23g of disodium edetate and 2g of cetyltrimethylammonium bromide were added to a 500mL beaker , 0.2g tartaric acid and 225mL distilled water, stir and mix evenly, add 110mL mass fraction 25% copper sulfate solution, stir for 18min, then adjust the pH to 8.0 with...

example 3

[0021] First weigh 10g of iron powder, add it to the sensitizing solution at a solid-to-liquid ratio of 1:5, soak for 20 minutes, then filter with suction to obtain a filter residue, add the filter residue to the activation solution at a solid-to-liquid ratio of 1:8, stir and mix for 20 minutes, and then filter with suction Get the iron powder after activation, standby; Described sensitization solution is to be dissolved in 1000mL mass fraction 10% hydrochloric acid solution by 10g stannous chloride, mixes; Described activation solution is to be obtained by 8g nickel chloride, 8g Sodium hypophosphite, 150mL of absolute ethanol and 230mL of deionized water were stirred and mixed for 15 minutes to prepare; then 25g of disodium edetate and 3g of cetyltrimethylammonium bromide were added to a 500mL beaker , 0.3g tartaric acid and 250mL distilled water, stir and mix evenly, add 120mL mass fraction 25% copper sulfate solution, stir for 20min, then adjust the pH to 8.5 with mass fract...

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Abstract

The invention discloses a method for preparing uniformly coated copper-clad iron composite powder, which belongs to the technical field of preparation of copper-clad iron composite powder. In the present invention, iron powder is added into the sensitizing solution for sensitization, and then added into the activation solution for activation to obtain activated iron powder, and then disodium edetate, copper sulfate solution, hydrazine solution and other materials are mixed to prepare copper sulfate coating Liquid, using hydrazine as a reducing agent to reduce copper sulfate to copper powder and uniformly coat the activated iron powder to obtain uniformly coated copper-clad iron composite powder. The beneficial effects of the present invention are: the preparation steps of the present invention are simple, no segregation phenomenon occurs during mixing, the copper-coated iron powder is uniform, and the coating rate reaches more than 99.2%; the obtained copper-clad iron composite powder has strong oxidation resistance and good compressibility, The color is bright.

Description

technical field [0001] The invention relates to a method for preparing uniformly coated copper-clad iron composite powder, which belongs to the technical field of copper-clad iron composite powder preparation. Background technique [0002] Coated powder is a new type of coating material and powder metallurgy material. It is widely used in defense industry, machinery manufacturing industry, chemical industry and other fields due to its unique properties and numerous varieties. Coating powder has heterogeneity in microcosm, coating integrity, and can highlight the characteristics of each component according to different needs; macroscopically, it has uniformity, which can make the metallographic structure of the product very uniform, greatly reducing or eliminating uneven mixing The resulting products have different components and unstable performance. Copper-clad iron composite powder is an ideal material for oil-impregnated bearings developed and produced in recent years. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/24
CPCB22F9/24B22F1/17
Inventor 仇颖莹盛海丰王统军
Owner 廖川金