CN102416480B - Method for preparing copper-tin-nickel alloy powder by water atomization - Google Patents
Method for preparing copper-tin-nickel alloy powder by water atomization Download PDFInfo
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- CN102416480B CN102416480B CN 201110379435 CN201110379435A CN102416480B CN 102416480 B CN102416480 B CN 102416480B CN 201110379435 CN201110379435 CN 201110379435 CN 201110379435 A CN201110379435 A CN 201110379435A CN 102416480 B CN102416480 B CN 102416480B
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Abstract
The invention relates to a method for preparing copper-tin-nickel alloy powder, in particular a method for preparing copper-tin-nickel alloy powder by water atomization, which comprises the following steps in turn: (1) smelting, namely smelting a raw material which is made by mixing copper, nickel and tin according a ratio of 91:1:8, in a smelting furnace; (2) atomizing, namely pouring alloy mixed liquid into a stopper ladle, allowing the alloy mixed liquid to flow into an atomization barrel through holes in the stopper ladle, and crushing the alloy mixed liquid into powder by high-pressure gas; and (3) drying, and drying the dewatered alloy powder in a drying machine. When the method for preparing copper-tin-nickel alloy powder by water atomization is used, the production is convenient, pollution is avoided in a production process, and the prepared copper-tin-nickel alloy powder can well replace copper and lead powder.
Description
Technical field
The present invention relates to a kind of preparation method of copper tin-nickel alloy powder, relate in particular to the method for preparing copper-tin-nickel alloy powder by water atomization.
Background technology
Copper-lead powder (Sn10-Pb10) is mainly used in the aspects such as component of machine, automobile bearing, and the main performance index of copper-lead powder is bending strength, wearability, draftability and corrosion resistance etc.Although leaded metal material environmental pollution in sintering process is larger, also do not reach at present the product of above-mentioned performance indications can instead of copper lead powder (Sn10-Pb10) in the use of the aspects such as component of machine, automobile bearing.
Summary of the invention
The objective of the invention is to disclose a kind of instead of copper lead powder and use, the preparation method of the copper tin-nickel alloy powder of bending strength, wearability, draftability and corrosion resistance and good.
In order to realize the foregoing invention purpose, the present invention has adopted following technical scheme:
The method of preparing copper-tin-nickel alloy powder by water atomization, comprise the following steps successively: (1) melting, copper, nickel, tin are mixed into raw material in the ratio of 91: 1: 8 add melting in smelting furnace, smelting temperature is between 1100～1300 ℃, after melting is complete, that the alloy mixed liquor is overheated 100～200 ℃; (2) atomizing, pour the alloy mixed liquor into bottom pour ladle, enters the atomizing bucket by the bottom pour ladle orifice flow, and alloy mixed liquor gases at high pressure smash powdered; (3) drying is carried out drying with the alloy powder after dehydration by drying machine and is processed; In above-mentioned atomization process, the height of alloy mixed liquor in the atomizing bucket remains between 13～17cm, and drags for simultaneously the slag operation, and the height of water level in the atomizing bucket is constant, and water temperature maintains between 50 ℃-100 ℃.
As preferably, described alloy powder in drying machine is ceaselessly stirred, in whipping process, drying machine heats up, and temperature is increased to 180 ℃ from 60 ℃.Baking temperature is too low, and is not exclusively dry, excess Temperature, and powder can lump, and slowly stirs and heats up, and makes the easier drying of powder, has saved drying time, has improved the quality of alloy powder.
As preferably, the leakage footpath of described bottom pour ladle is between 3.0-6.0mm.
As preferably, described alloy mixed liquor is smashed powdered through out gases at high pressure after nozzle, and nozzle angle is between 10～16 degree.
Adopted the method for the preparing copper-tin-nickel alloy powder by water atomization of technique scheme, copper, nickel, tin are mixed into raw material in the ratio of 91: 1: 8 and carry out melting, and Overheating Treatment after melting has guaranteed the product apparent density 〉=5.1g/cm that makes
3, mobility≤15s/50g, the performances such as bending strength, wearability, draftability and corrosion resistance all are better than the copper-lead powder, are the preferably selections that the instead of copper lead powder uses in fields such as component of machine, automobile bearings.The height of alloy mixed liquor in the atomizing bucket remains between 13～17cm, have the surface that impurity floats over the alloy mixed liquor during atomizing, the height of alloy mixed liquor in the atomizing bucket can't not implement to drag for the slag operation in above-mentioned scope, impurity will be sneaked in the alloy mixed liquor, cause the copper tin-nickel alloy powder of final preparation not deposited, affect its performance; Height of water level in the atomizing bucket is constant; water temperature maintains between 50 ℃-100 ℃; it is the cooling difference of copper tin-nickel alloy powder that is shaped in order to prevent from atomizing and being out of shape; height of water level is constant in addition is also even for the water temperature insulation and the protection crucible; when height of water level adjustment alloy mixed liquor is poured into, impulsive force can change, can the minimizing crucible life if highly too low.In sum, the method for this preparing copper-tin-nickel alloy powder by water atomization is convenient for production, and production process is pollution-free, and the copper tin-nickel alloy powder of preparation can well the instead of copper lead powder.
The specific embodiment
The below makes a detailed explanation the specific embodiment of invention.
The method of preparing copper-tin-nickel alloy powder by water atomization, step comprise melting, atomizing and drying successively.
(1) melting is mixed into raw material with copper, nickel, tin in the ratio of 91: 1: 8 and adds melting in mid-frequency melting furnace, and specifically every stove is 200 kilograms, copper 182Kg wherein, nickel 2Kg, tin 16Kg.
Smelting temperature is between 1100～1300 ℃, and is after melting is complete, that the alloy mixed liquor is overheated 100～200 ℃.
(2) atomizing, pour the alloy mixed liquor into bottom pour ladle, leak the footpath between 3.0-6.0mm, enter the atomizing bucket by the bottom pour ladle orifice flow, air compressor machine produces gases at high pressure alloy mixed liquor and carries out fragmentation, specifically the alloy mixed liquor is smashed through out gases at high pressure after nozzle and is formed tiny spherical powder, and nozzle angle is between 10～16 degree.
In atomization process, the height of alloy mixed liquor in the atomizing bucket remains between 13～17cm, and drag for simultaneously the slag operation, have the surface that impurity floats over the alloy mixed liquor during atomizing, the height of alloy mixed liquor in the atomizing bucket can't not implement to drag for the slag operation in above-mentioned scope, impurity will be sneaked in the alloy mixed liquor, cause the copper tin-nickel alloy powder of final preparation not deposited, affect its performance.
height of water level in the atomizing bucket is constant, water temperature maintains between 50 ℃-100 ℃, it is the cooling difference of copper tin-nickel alloy powder that is shaped in order to prevent from atomizing and being out of shape, specifically be atomised to the copper tin-nickel alloy powder from the alloy mixed liquor cooling, reduced and contacted different heights of water level and namely contact the identical change that prevents copper tin-nickel alloy powder surface configuration of water time, namely reduce the contraction distortion in cooling procedure of copper tin-nickel alloy powder, height of water level is constant in addition is also even for the water temperature insulation and the protection crucible, when height of water level adjustment alloy mixed liquor is poured into, impulsive force can change, can the minimizing crucible life if highly too low.
(3) drying is carried out drying with the alloy powder after dehydration by drying machine and is processed, and specifically alloy powder in drying machine is ceaselessly stirred, and in whipping process, drying machine heats up, and temperature is increased to 180 ℃ from 60 ℃.Baking temperature is too low, and is not exclusively dry, excess Temperature, and powder can lump, and slowly stirs and heats up, and makes the easier drying of powder, has saved drying time, has improved the quality of alloy powder.
Following table is to compare by the copper tin-nickel alloy powder of this patent method preparation and the performance parameter of Pot metal powder.
The copper tin-nickel alloy powder apparent density 〉=5.1g/cm for preparing by said method
3Mobility :≤15s/50g, the bending strength performance is suitable with the Pot metal powder, wearability, draftability and corrosion resistance all are better than the Pot metal powder, therefore copper tin-nickel alloy powder pine can well instead of copper metal powder, especially can improve the impact of Pot metal powder environmental pollution in sintering process, avoid leaded waste products to cause adverse consequences to environment.
Claims (4)
1. the method for preparing copper-tin-nickel alloy powder by water atomization, it is characterized in that comprising the following steps successively: (1) melting, copper, nickel, tin are mixed into raw material in the ratio of 91: 1: 8 add melting in smelting furnace, smelting temperature is between 1100～1300 ℃, after melting is complete, that the alloy mixed liquor is overheated 100～200 ℃; (2) atomizing, pour the alloy mixed liquor into bottom pour ladle, enters the atomizing bucket by the bottom pour ladle orifice flow, and gases at high pressure smash the alloy mixed liquor and form powder; (3) drying is carried out drying with the alloy powder after dehydration by drying machine and is processed; In above-mentioned atomization process, the height of alloy mixed liquor in the atomizing bucket remains between 13～17cm, and drags for simultaneously the slag operation, and the height of water level in the atomizing bucket is constant, and water temperature maintains between 50 ℃-100 ℃.
2. the method for preparing copper-tin-nickel alloy powder by water atomization according to claim 1, is characterized in that alloy powder in drying machine is ceaselessly stirred, and in whipping process, drying machine heats up, and temperature is increased to 180 ℃ from 60 ℃.
3. the method for preparing copper-tin-nickel alloy powder by water atomization according to claim 1 is characterized in that the leakage footpath of bottom pour ladle is between 3.0-6.0mm.
4. the method for preparing copper-tin-nickel alloy powder by water atomization according to claim 1 is characterized in that the alloy mixed liquor is smashed powdered through out gases at high pressure after nozzle, and nozzle angle is between 10～16 degree.
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| CN102814181B (en) * | 2012-08-10 | 2015-04-01 | 中国恩菲工程技术有限公司 | Catalyst used for preparing trichlorosilane through silicon tetrachloride cold hydrogenation, and preparation method thereof |
| CN103042220A (en) * | 2012-12-14 | 2013-04-17 | 浦江汇凯粉体科技有限公司 | Method for preparing aluminum bronze powder by water atomization |
| CN103949651B (en) * | 2014-04-30 | 2016-01-20 | 浙江旭德新材料有限公司 | A kind of preparation method of unleaded antifriction anticorrosion alloy dusty material |
| CN104028768A (en) * | 2014-05-27 | 2014-09-10 | 山东省金圣隆机械有限公司 | Nickel alloy powder atomization manufacturing process and equipment thereof |
| CN106077683A (en) * | 2016-08-10 | 2016-11-09 | 浙江旭德新材料有限公司 | Its bi-metal shaft bushing material copper alloy powder of a kind of copper and tin bismuth alloy powder and aerosolization preparation method and application thereof |
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| CN1757469A (en) * | 2005-06-03 | 2006-04-12 | 北京科技大学 | Nickel based alloy powder for laser sintering formation, and its prepn. method |
| CN1824435A (en) * | 2006-04-07 | 2006-08-30 | 郭德林 | Spray method for preparing low apparent density bronze powder |
| CN101688268A (en) * | 2007-05-15 | 2010-03-31 | 大丰工业株式会社 | Pb-free copper alloy sliding material and plain bearings |
| CN101837460A (en) * | 2010-04-26 | 2010-09-22 | 吴棕洋 | Method for preparing low-apparent-density copper powder through water atomization |
| CN101966587A (en) * | 2010-10-27 | 2011-02-09 | 戴煜 | Method for preparing high-performance heat conducting tube copper powder |
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| KR100974807B1 (en) * | 2010-03-12 | 2010-08-06 | 김병두 | Composite for iron-based amorphous alloy with high oxidation resistance, method of manufacturing iron-based amorphous alloy powder and iron-based amorphous alloy powder manufactured the method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757469A (en) * | 2005-06-03 | 2006-04-12 | 北京科技大学 | Nickel based alloy powder for laser sintering formation, and its prepn. method |
| CN1824435A (en) * | 2006-04-07 | 2006-08-30 | 郭德林 | Spray method for preparing low apparent density bronze powder |
| CN101688268A (en) * | 2007-05-15 | 2010-03-31 | 大丰工业株式会社 | Pb-free copper alloy sliding material and plain bearings |
| CN101837460A (en) * | 2010-04-26 | 2010-09-22 | 吴棕洋 | Method for preparing low-apparent-density copper powder through water atomization |
| CN101966587A (en) * | 2010-10-27 | 2011-02-09 | 戴煜 | Method for preparing high-performance heat conducting tube copper powder |
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