CN1548261A - Making process of composite iron-in-copper powder - Google Patents
Making process of composite iron-in-copper powder Download PDFInfo
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- CN1548261A CN1548261A CNA031178634A CN03117863A CN1548261A CN 1548261 A CN1548261 A CN 1548261A CN A031178634 A CNA031178634 A CN A031178634A CN 03117863 A CN03117863 A CN 03117863A CN 1548261 A CN1548261 A CN 1548261A
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Abstract
The making process of composite iron-in-copper powder includes adding reduced iron powder fast into copper sulfate solution with added stabilizer and pH value 0.5-4.8 under stirring to make copper coat the surface of iron particle to form composite iron-in-copper powder; depositing composite iron-in-copper powder for 3-20 min, eliminating supernatant, washing with clear water until showing no acidity; dewatering, drying and sieving; antioxidant treatment, mixing, inspection and storing. The said technological process can coat iron powder with copper homogeneously, closely and firmly, and the composite iron-in-copper powder has raised antioxidant performance and no oxidation within 6 months.
Description
(I) in the field of technology
The invention relates to a method for manufacturing metal powder, in particular to a method for manufacturing composite metal powder required by oil-retaining bearings.
(II) technical background
Compared with the traditional ball bearing, the oil-retaining bearing has the advantages of low cost, simplified structure and the like. With the gradual expansion of the application range of powder metallurgy, the oil-retaining bearing which is one of the main applications of powder metallurgy is widely used, and the total yield of the oil-retaining bearing in China reaches 25 hundred million in 1999. Therefore, the amount of metal powder, which is a raw material required for producing oil-impregnated bearings, is rapidly increasing, and the variety of metal powder is gradually developed from mixed powder and alloy powder to composite powder. At present, bronze powder is generally adopted to manufacture oil-retaining bearings of powder products in China, on one hand, the price of a copper-based product manufactured by bronze powder is high due to high price of raw materials, and on the other hand, the bronze powder contains lead, and the copper-based product is a lead-free product as much as possible according to the current environmental protection requirement, so the copper-based product manufactured by bronze powder is severely restricted. The copper-clad iron composite powder is an ideal material for oil-containing bearings developed in recent years, and is an iron-based composite powder which is formed by coating a layer of copper film on the surface of iron powder serving as a base and has the same appearance color as copper powder. Compared with the oil bearing made of bronze powder, the oil bearing produced by the copper-clad iron composite powder not only meets the requirement of environmental protection, but also has much lower price, and is widely applied and popularized by the majority of users. The existing production method of copper-clad iron composite powder adopts a diffusion method, which is to uniformly mix copper powder and reduced iron powder according to a certain proportion, then heat the mixture to a certain temperature to melt the copper powder and coat the copper powder on the surface of iron powder particles, and because the method is to coat the copper on the surface of the iron powder particles in a physical mode, the method has the following defects:
1. because the bulk densities of the copper powder and the iron powder are different, segregation is easy to occur during mixing, segregation causes more local copper and less local copper, even no copper and more copper, and when the iron powder particles are coated with the copper, the copper film is too thick; in the place with less copper, when the iron powder particles are coated by the copper, the coating is incomplete, even the iron powder particles are not coated completely. In short, the copper-coated iron powder is not uniform.
2. Because the copper and the iron are in physical contact, the gas is easily coated in the copper and the copper film bubbles and falls off due to the reduction of the contact tightness.
3. Because the method does not carry out anti-oxidation treatment, the produced copper-clad iron composite powder is easy to oxidize.
(III) summary of the invention
The invention aims to provide a method for manufacturing copper-clad iron composite powder, which not only can ensure that copper is uniformly, tightly and firmly coated on iron powder particles, but also can improve the oxidation resistance of the iron powder particles.
The invention is realized by the technical scheme, and the method comprises the following steps:
(1) dissolving copper sulfate, and adjusting the pH value of the dissolved copper sulfate solution to 0.5-4.8;
(2) adding a stabilizer which is 0.0283 per mill of the total weight of the copper sulfate, rapidly adding the reducediron powder under the stirring state, and continuously stirring for 2-10 minutes to ensure that the copper is completely coated on the surface of the iron powder particles to form copper-coated iron composite powder, wherein the weight ratio of the copper sulfate to the reduced iron powder is 4: 5;
(3) settling the copper-coated iron composite powder for 3-20 minutes, removing supernatant, and adding clear water for washing until the copper-coated iron composite powder is free of acidity;
(4) conveying the washed copper-clad iron composite powder to a centrifuge for dehydration, then drying, and screening according to the specification and size of the product;
(5) and carrying out anti-oxidation treatment on the screened copper-clad iron composite powder, and then mixing the powder, inspecting, packaging and warehousing.
The invention mainly adopts a chemical displacement method, according to the electrochemical principle, the reduced iron powder and the copper sulfate solution are subjected to chemical reaction at normal temperature under the action of a stabilizer with the PH value of 0.5-4.8, and the reaction equation is as follows:
so that the surface of the iron powder particles is uniformly and tightly coated with a layer of copper film, and then the copper film is washed, dried and reduced to obtain the light rose red or brownish red coating powder with irregular shape. Because the stirring is fully carried out in the reaction process, the surface reaction of all the reduced iron powder particles can be ensured to be full, and the purpose that the copper film is completely coated on the surfaces of the iron powder particles is realized.
By adopting the technical scheme, the invention can ensure that copper is uniformly, tightly and firmly completely coated on iron powder particles, ensures that the iron powder particles are not oxidized after being placed for six months, and improves the oxidation resistance of the iron powder particles.
(IV) detailed description of the preferred embodiment
The following examples further illustrate the invention:
the method comprises the following steps:
(1) dissolving 60Kg of copper sulfate, and adjusting the pH value of the dissolved copper sulfate solution to 0.5-4.8, wherein the volume of the copper sulfate solution is 340L;
(2) adding 1.7g of stabilizer, rapidly adding 75Kg of reduced iron powder under stirring, and continuously stirring for 2-10 minutes to ensure that copper is completely coated on the surface of iron powder particles, thereby forming copper-coated iron composite powder;
(3) settling the copper-coated iron composite powder for 3-20 minutes, removing supernatant, and adding clear water for washing until the copper-coated iron composite powder is free of acidity;
(4) conveying the washed copper-clad iron composite powder to a centrifuge for dehydration, then drying, and screening according to the specification and size of the product;
(5) and carrying out anti-oxidation treatment on the screened copper-clad iron composite powder, and then mixing the powder, inspecting, packaging and warehousing.
The stabilizer is also called M accelerator, and can be 2-mercapto benzothiazole.
The anti-oxidation treatment of the copper-coated iron composite powder can be carried out by adding 5 percent of zinc stearate into the copper-coated iron composite powder.
The anti-oxidation treatment of the copper-clad iron composite powder can also be carried out by adding 5 per mill of benzotriazole into the copper-clad iron composite powder.
Claims (4)
1. A manufacturing method of copper-clad iron composite powder comprises the following steps:
(1) dissolving copper sulfate, and adjusting the pH value of the dissolved copper sulfate solution to 0.5-4.8;
(2) adding a stabilizer which is 0.0283 per mill of the total weight of the copper sulfate, rapidly adding the reduced iron powder under the stirring state, and continuously stirring for 2-10 minutes to ensure that the copper is completely coated on the surface of the iron powder particles to form copper-coated iron composite powder, wherein the weight ratio of the copper sulfate to the reduced iron powder is 4: 5;
(3) settling the copper-coated iron composite powder for 3-20 minutes, removing supernatant, and adding clear water for washing until the copper-coated iron composite powder is free of acidity;
(4) conveying the washed copper-clad iron composite powder to a centrifuge for dehydration, then drying, and screening according to the specification and size of the product;
(5) and carrying out anti-oxidation treatment on the screened copper-clad iron composite powder, and then mixing the powder, inspecting, packaging and warehousing.
2. The method for manufacturing copper-clad iron composite powder according to claim 1, wherein: the stabilizer is also called M accelerator, and is 2-mercapto benzothiazole.
3. The method for producing copper-clad iron composite powder according to claim 1 or 2, characterized in that: the anti-oxidation treatment mode of the copper-coated iron composite powder is to add 5 percent of zinc stearate into the copper-coated iron composite powder.
4. The method for producing copper-clad iron composite powder according to claim 1 or 2, characterized in that: the anti-oxidation treatment of the copper-clad iron composite powder is carried out by adding 5 per mill of benzotriazole into the copper-clad iron composite powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117863 CN1209216C (en) | 2003-05-13 | 2003-05-13 | Making process of composite iron-in-copper powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117863 CN1209216C (en) | 2003-05-13 | 2003-05-13 | Making process of composite iron-in-copper powder |
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| Publication Number | Publication Date |
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| CN1548261A true CN1548261A (en) | 2004-11-24 |
| CN1209216C CN1209216C (en) | 2005-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117863 Expired - Fee Related CN1209216C (en) | 2003-05-13 | 2003-05-13 | Making process of composite iron-in-copper powder |
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| CN (1) | CN1209216C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348351C (en) * | 2005-08-18 | 2007-11-14 | 重庆扬子粉末冶金有限责任公司 | Manufacturing method of copper-coated iron composite powder |
| CN1868637B (en) * | 2005-05-25 | 2010-04-21 | 成都平和同心金属粉末有限公司 | Copper alloy coated composite powder and its preparation method |
| CN101088672B (en) * | 2007-07-18 | 2010-05-12 | 重庆扬子粉末冶金有限责任公司 | Cu-Sn-Zn-Pb alloy coated composite iron powder and its production process |
| CN101987359A (en) * | 2010-11-16 | 2011-03-23 | 蒋剑秋 | Preparation method of reduced copper coated iron composite powder by using wet method |
| CN102689011A (en) * | 2012-06-14 | 2012-09-26 | 湖南顶融科技有限公司 | Preparation method for copper-coated composite powder |
| CN102886517A (en) * | 2012-10-30 | 2013-01-23 | 江苏雄风科技有限公司 | Method for directly producing copper and iron coated powder by using byproduct copper extract of cobalt copper ore production |
| CN102950281A (en) * | 2012-08-24 | 2013-03-06 | 山东莱芜金华辰粉末冶金制品有限公司 | Method for improving copper component segregation of powder metallurgy structure part |
| CN103966581A (en) * | 2014-04-24 | 2014-08-06 | 四川大学 | Iron-copper material provided with compact and uniform copper layer distributed on surface in discrete manner and preparation method of iron-copper material |
| CN105149565A (en) * | 2015-08-19 | 2015-12-16 | 中山市新泰兴粉末冶金有限公司 | Powder metallurgy material and preparation method thereof |
| CN105562713A (en) * | 2016-01-30 | 2016-05-11 | 常州市君成机械有限公司 | Preparing method for copper coated iron composite powder |
| CN106862555A (en) * | 2016-12-22 | 2017-06-20 | 杭州前进齿轮箱集团股份有限公司 | A kind of iron Cu-Sn-Zn composite powder and preparation method |
| CN108311692A (en) * | 2018-05-03 | 2018-07-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method at anti-oxidant copper-coated iron composite powder end |
| CN110280759A (en) * | 2019-08-12 | 2019-09-27 | 广东工业大学 | A kind of preparation method of micro-nano core-shell material and the device for preparing micro-nano core-shell material |
| CN111036934A (en) * | 2019-12-03 | 2020-04-21 | 昆明理工大学 | Method and device for circularly and hermetically preparing copper-clad iron |
| CN115490359A (en) * | 2022-09-06 | 2022-12-20 | 重庆九瑞金属材料有限公司 | Copper-clad iron waste liquid treatment device |
-
2003
- 2003-05-13 CN CN 03117863 patent/CN1209216C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868637B (en) * | 2005-05-25 | 2010-04-21 | 成都平和同心金属粉末有限公司 | Copper alloy coated composite powder and its preparation method |
| CN100348351C (en) * | 2005-08-18 | 2007-11-14 | 重庆扬子粉末冶金有限责任公司 | Manufacturing method of copper-coated iron composite powder |
| CN101088672B (en) * | 2007-07-18 | 2010-05-12 | 重庆扬子粉末冶金有限责任公司 | Cu-Sn-Zn-Pb alloy coated composite iron powder and its production process |
| CN101987359A (en) * | 2010-11-16 | 2011-03-23 | 蒋剑秋 | Preparation method of reduced copper coated iron composite powder by using wet method |
| CN101987359B (en) * | 2010-11-16 | 2012-10-03 | 蒋剑秋 | Preparation method of reduced copper coated iron composite powder by using wet method |
| CN102689011B (en) * | 2012-06-14 | 2014-10-08 | 湖南顶融科技有限公司 | Preparation method for copper-coated composite powder |
| CN102689011A (en) * | 2012-06-14 | 2012-09-26 | 湖南顶融科技有限公司 | Preparation method for copper-coated composite powder |
| CN102950281A (en) * | 2012-08-24 | 2013-03-06 | 山东莱芜金华辰粉末冶金制品有限公司 | Method for improving copper component segregation of powder metallurgy structure part |
| CN102886517A (en) * | 2012-10-30 | 2013-01-23 | 江苏雄风科技有限公司 | Method for directly producing copper and iron coated powder by using byproduct copper extract of cobalt copper ore production |
| CN103966581A (en) * | 2014-04-24 | 2014-08-06 | 四川大学 | Iron-copper material provided with compact and uniform copper layer distributed on surface in discrete manner and preparation method of iron-copper material |
| CN105149565A (en) * | 2015-08-19 | 2015-12-16 | 中山市新泰兴粉末冶金有限公司 | Powder metallurgy material and preparation method thereof |
| CN105149565B (en) * | 2015-08-19 | 2017-10-24 | 中山市新泰兴粉末冶金有限公司 | A kind of powdered metallurgical material and preparation method thereof |
| CN105562713A (en) * | 2016-01-30 | 2016-05-11 | 常州市君成机械有限公司 | Preparing method for copper coated iron composite powder |
| CN106862555A (en) * | 2016-12-22 | 2017-06-20 | 杭州前进齿轮箱集团股份有限公司 | A kind of iron Cu-Sn-Zn composite powder and preparation method |
| CN108311692A (en) * | 2018-05-03 | 2018-07-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method at anti-oxidant copper-coated iron composite powder end |
| CN110280759A (en) * | 2019-08-12 | 2019-09-27 | 广东工业大学 | A kind of preparation method of micro-nano core-shell material and the device for preparing micro-nano core-shell material |
| CN111036934A (en) * | 2019-12-03 | 2020-04-21 | 昆明理工大学 | Method and device for circularly and hermetically preparing copper-clad iron |
| CN115490359A (en) * | 2022-09-06 | 2022-12-20 | 重庆九瑞金属材料有限公司 | Copper-clad iron waste liquid treatment device |
| CN115490359B (en) * | 2022-09-06 | 2023-06-23 | 重庆九瑞金属材料有限公司 | Copper-clad iron waste liquid treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1209216C (en) | 2005-07-06 |
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