CN102794457A - Method for producing bronze coated iron powder - Google Patents
Method for producing bronze coated iron powder Download PDFInfo
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- CN102794457A CN102794457A CN2012100753420A CN201210075342A CN102794457A CN 102794457 A CN102794457 A CN 102794457A CN 2012100753420 A CN2012100753420 A CN 2012100753420A CN 201210075342 A CN201210075342 A CN 201210075342A CN 102794457 A CN102794457 A CN 102794457A
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Abstract
The invention relates to a method for producing bronze coated iron powder, wherein copper accounts for 18%-20% (weight percentage) of the total weight of the composite powder, while tin accounts for 1.8%-2% (weight percentage) of the total weight of the composite powder, and the rest is iron. The method comprises the following steps of: according to the predetermined components of the bronze coated iron powder, weighing appropriate cupric oxide powder, tin powder and iron powder, respectively; firstly, evenly mixing the weighed cupric oxide powder and the pure iron powder together in a ball mill or a mixer, and then, adding the tin powder for mixing; next, moving the evenly mixed powder to a reducing furnace, and performing reducing diffusion in an ammonia decomposition or ammonia combustion atmosphere, thereby obtaining the bronze coated iron powder. The method for producing the bronze coated iron powder is simple in production process, thereby reducing the production cost; the copper layer on the surface of the individual bronze coated iron particle obtained by the method is complete and compact and the quality of the bronze coated iron powder is guaranteed; and simultaneously, no harmful substance is emitted in the preparation process, thereby avoiding pollution and damage on the environment.
Description
Technical field
The present invention relates to a kind of preparation method of copper alloy powder, relate in particular to a kind of production method of bronze-coated iron composite powder.
Background technology
In field of powder metallurgy, the consumption of copper and copper alloy powder is only second to iron powder, is mainly used in industries such as powder metallurgy parts, diamond tool, electrical alloy, in commercial production, plays an important role.Advantages such as that oiliness bearing has is with low cost, designs simplification.Along with the progressively expansion of powder metallurgy range of application, the use of the oiliness bearing of one of mainly using as powder metallurgy also more and more widely.Because copper is raw-material on the high side, therefore use the higher copper powder of copper content to receive more serious restriction.Copper-coated iron composite powder is the ideal material of the oiliness bearing developed in recent years, and it is to be the basis with the iron powder, coats a side copper film at its particle surface, forms the similar iron-based composite powder of a kind of appearance color and copper powder.Oiliness bearing with copper-coated iron composite powder production; Compliance with environmental protection requirements not only; And price is much lower, obtains users' extensive use and popularization, but also has certain shortcoming in actual use: 1) performance is not good: the bearing that the copper-clad iron material is manufactured; The high rotating speed occasion life-span can't reach product requirement, can only be used in the low occasion of carrying of low speed.2) sintering temperature is higher: copper-clad iron material, sintering temperature use copper base sintering furnace sintering in the actual production about 850 ℃, copper base sintering temperature about 750 ℃ and copper-clad iron sintering temperature have big difference, the temperature adjustment waste is too high.Because copper-clad iron material order is on the low side, frequent temperature adjustment waste is surprising.
Raw material manufacturer is newly developed copper tin iron clad powder is compared with the copper-clad iron powder, has increased the component of metallic tin; Through on probation; The bearing that adopts copper tin iron clad powder to manufacture, its life-span is superior to the bearing that adopts the copper-clad iron powder to manufacture, can be used for general bearing products by the instead of copper glass putty fully.Think that its combination property is stronger than copper-clad iron powder, can be used for general bearing products by the Alloy instead of Copper glass putty.The Chinese invention patent application that application number is 200710092441.9, publication number is CN101088669A discloses a kind of bronze-coated iron composite powder and manufacturing approach thereof; It is in copper-coated iron composite powder, evenly to sneak into signal bronze powder or glass putty; In reduction furnace, reduce and adhere to or the reduction diffusion; Temperature is 400-800 ℃ in the stove, and the time is no less than 30 minutes, makes the surface of copper-coated iron composite powder form the signal bronze clad.Yet this method still have a following shortcoming:
1) because what adopt during preparation copper tin iron clad powder is that a part of raw material are copper-clad iron powder, and the copper-clad iron powder need just can make through complicated step comparatively,
2) at present quality preferably the copper-clad iron powder need the chemical replacement method to make usually, possibly pollute bad border in process of production.
3) if make through reduction-diffusion process as raw material copper-clad iron powder; Its copper layer uniformity and compactness are not high enough; Cause in the back reducing and adhere to or during the reduction diffusion, formed copper tin layer is stable inadequately, in the process of transportation or work, comes off easily with signal bronze powder or glass putty.
Summary of the invention
The object of the present invention is to provide a kind of bronze-coated iron production method, can directly make bronze-coated iron composite powder, reduced middle operation, both reduced production costs, guarantee the bronze-coated iron composite powder quality again, avoid pollution simultaneously environment from raw material.
The present invention is for realizing the foregoing invention purpose; The technical scheme that is adopted is following: a kind of production method of bronze-coated iron composite powder; Copper accounts for 18%-20% (percetage by weight) of said composite powder gross weight; Tin accounts for 1.8%-2% (percetage by weight) of said composite powder gross weight, and surplus is an iron; The concrete steps of this method are following:
1), the bronze-coated iron composite powder composition according to setting takes by weighing an amount of cupric oxide powder, pure tin powder and iron powder respectively;
2), place ball mill or batch mixer to be mixed to cupric oxide powder that takes by weighing and straight iron powder earlier, then the glass putty adding is mixed again to the powder color even;
3), the above-mentioned powder that mixes is moved in the reduction furnace, reduce diffusion down, reduce 620 ~ 730 ℃ of diffusion temperatures, reduce 1 ~ 3 hour DIFFUSION TREATMENT time in decomposed ammonia or the protection of ammonia combustion atmosphere; After the reduction diffusion is accomplished, continue in protective atmosphere, to be cooled to below 50 ℃ to come out of the stove;
4), the body of powder after the reduction diffusion is carried out fragmentation, screening;
5), powder, check, metering and packing warehouse-in are mixed in the bronze-coated iron composite powder end after the screening.
Principle of the present invention is following: owing to be easy to take place the process of iron reductive copper oxide under the normal temperature; Therefore earlier when cupric oxide powder and straight iron powder being mixed in ball mill or batch mixer; Cupric oxide and iron particle can come in contact and the above-mentioned reduction reaction of generation on contact interface; Therefore, cupric oxide and iron particle just can form interface combination preferably, are wrapped in the iron particle surface thereby copper oxide particle is adhered to naturally equably; And the interface binding power that this reduction reaction forms is higher, and this has just diffuseed to form basis preferably for follow-up reduction.
After this mixed-powder is sent in the reduction furnace, made the oxide generation chemical reaction of metal surface exactly, seize the oxygen in the oxide; The surface that makes metal dust is pure, and originally the multiple cupric oxide at the iron particle surface of bag is reduced into fine copper, diffusion also can take place between the fine copper combine; In addition; When sintering, the tin of closest surface has promoted the abundant diffusion of copper, so intergranular combination is firm.Because tin is trickle particle, the position after the diffusion does not form tangible hole, can not have a negative impact to bearing arrangement.Simultaneously, because the existence of tin, sintering temperature significantly reduces, and in the time of 700 ℃, just can obtain good sintering character.The copper tin iron clad powder material uniform particles that makes does not thus have big hole to occur, and has guaranteed the area and the continuity of loading end.
Parameters such as corresponding steps of the present invention and diffusion temperature, reduction DIFFUSION TREATMENT time and tapping temperature are all passed through a large amount of experiments and are obtained.
Beneficial effect of the present invention is:
1) with respect to prior art, saved the middle operation of preparation bronze-coated iron composite powder, further controlled cost.
2) copper tin iron clad prescription unit price is than copper-clad iron formula unit price cheap 4000 yuan per ton.Reduced the cost of raw material.
3) at copper base sintering furnace sintering, copper-clad iron formula and copper base sintering temperature differ 100 ℃.Temperature adjustment needs 9 hours.And copper tin iron clad prescription and copper base sintering temperature differ 35 ℃, only need 2 hours.
4) the copper layer according to the bronze-coated iron particle surface that makes of the present invention is complete and fine and close, guarantees the bronze-coated iron composite powder quality; Simultaneously, the preparation process does not have discharge of poisonous waste, has avoided environment is polluted and destroys.
The specific embodiment
Embodiment 1
Copper accounts for 18% (percetage by weight) of said composite powder gross weight, and tin accounts for 1.8% (percetage by weight) of said composite powder gross weight, and surplus is an iron; The concrete steps of this method are following:
1), the bronze-coated iron composite powder composition according to setting takes by weighing an amount of cupric oxide powder, pure tin powder and iron powder respectively;
2), place ball mill or batch mixer to be mixed to cupric oxide powder that takes by weighing and straight iron powder earlier, then the glass putty adding is mixed again to the powder color even;
3), the above-mentioned powder that mixes is moved in the reduction furnace, reduce diffusion down, reduce 620 ℃ of diffusion temperatures, reduce 1 hour DIFFUSION TREATMENT time in decomposed ammonia or the protection of ammonia combustion atmosphere; After the reduction diffusion is accomplished, continue in protective atmosphere, to be cooled to below 50 ℃ to come out of the stove;
4), the body of powder after the reduction diffusion is carried out fragmentation, screening;
5), powder, check, metering and packing warehouse-in are mixed in the bronze-coated iron composite powder end after the screening.
Embodiment 2
Copper accounts for 20% (percetage by weight) of said composite powder gross weight, and tin accounts for 2% (percetage by weight) of said composite powder gross weight, and surplus is an iron; The concrete steps of this method are following:
1), the bronze-coated iron composite powder composition according to setting takes by weighing an amount of cupric oxide powder, pure tin powder and iron powder respectively;
2), place ball mill or batch mixer to be mixed to cupric oxide powder that takes by weighing and straight iron powder earlier, then the glass putty adding is mixed again to the powder color even;
3), the above-mentioned powder that mixes is moved in the reduction furnace, reduce diffusion down, reduce 730 ℃ of diffusion temperatures, reduce 3 hours DIFFUSION TREATMENT time in decomposed ammonia or the protection of ammonia combustion atmosphere; After the reduction diffusion is accomplished, continue in protective atmosphere, to be cooled to below 49 ℃ to come out of the stove;
4), the body of powder after the reduction diffusion is carried out fragmentation, screening;
5), powder, check, metering and packing warehouse-in are mixed in the bronze-coated iron composite powder end after the screening.
Embodiment 3
Copper accounts for 19% (percetage by weight) of said composite powder gross weight, and tin accounts for 2% (percetage by weight) of said composite powder gross weight, and surplus is an iron; The concrete steps of this method are following:
1), the bronze-coated iron composite powder composition according to setting takes by weighing an amount of cupric oxide powder, pure tin powder and iron powder respectively;
2), place ball mill or batch mixer to be mixed to cupric oxide powder that takes by weighing and straight iron powder earlier, then the glass putty adding is mixed again to the powder color even;
3), the above-mentioned powder that mixes is moved in the reduction furnace, reduce diffusion down, reduce 700 ℃ of diffusion temperatures, reduce 2 hours DIFFUSION TREATMENT time in decomposed ammonia or the protection of ammonia combustion atmosphere; After the reduction diffusion is accomplished, continue in protective atmosphere, to be cooled to below 50 ℃ to come out of the stove;
4), the body of powder after the reduction diffusion is carried out fragmentation, screening;
5), powder, check, metering and packing warehouse-in are mixed in the bronze-coated iron composite powder end after the screening.
The above-mentioned bronze-coated iron composite powder that the present invention is made uses on the 22Q0003A bearing, and the assembling rear motor life-span reaches specification requirement (rotating speed is 10000 rev/mins, requires life-span 240h).This type of high rotating speed bearing can only adopt copper glass putty material to manufacture in the past.
At 14D0038,14D0039 uses on the products such as 14D0040, has also reached good effect.
Claims (1)
1. the production method of a bronze-coated iron composite powder, copper accounts for 18%-20% (percetage by weight) of said composite powder gross weight, and tin accounts for 1.8%-2% (percetage by weight) of said composite powder gross weight, and surplus is an iron; It is characterized in that the concrete steps of this method are following:
1), the bronze-coated iron composite powder composition according to setting takes by weighing an amount of cupric oxide powder, pure tin powder and iron powder respectively;
2), place ball mill or batch mixer to be mixed to cupric oxide powder that takes by weighing and straight iron powder earlier, then the glass putty adding is mixed again to the powder color even;
3), the above-mentioned powder that mixes is moved in the reduction furnace, reduce diffusion down, reduce 620 ~ 730 ℃ of diffusion temperatures, reduce 1 ~ 3 hour DIFFUSION TREATMENT time in decomposed ammonia or the protection of ammonia combustion atmosphere; After the reduction diffusion is accomplished, continue in protective atmosphere, to be cooled to below 50 ℃ to come out of the stove;
4), the body of powder after the reduction diffusion is carried out fragmentation, screening;
5), powder, check, metering and packing warehouse-in are mixed in the bronze-coated iron composite powder end after the screening.
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| CN2012100753420A CN102794457A (en) | 2012-03-21 | 2012-03-21 | Method for producing bronze coated iron powder |
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| CN2012100753420A CN102794457A (en) | 2012-03-21 | 2012-03-21 | Method for producing bronze coated iron powder |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672170A (en) * | 2012-06-12 | 2012-09-19 | 夏德虎 | Bronze-coated iron composite powder |
| CN103203457A (en) * | 2013-04-15 | 2013-07-17 | 河北钢铁股份有限公司邯郸分公司 | Method for manufacturing iron-copper alloy from iron oxide red and copper sulfate |
| CN104493184A (en) * | 2014-11-27 | 2015-04-08 | 南京大学 | Manufacturing method of spherical bronze alloy 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 |
| CN108580918A (en) * | 2018-05-21 | 2018-09-28 | 金川集团股份有限公司 | A kind of production method of copper and iron spread powder |
| CN110369730A (en) * | 2019-08-16 | 2019-10-25 | 四川容克斯科技有限公司 | A kind of copper-clad iron powder and preparation method thereof |
| CN110523972A (en) * | 2019-09-20 | 2019-12-03 | 四川容克斯科技有限公司 | A kind of production system of copper-clad iron powder |
| CN111451519A (en) * | 2020-04-03 | 2020-07-28 | 龙门金南磁性材料有限公司 | Preparation method of brass-coated iron powder |
| CN113102748A (en) * | 2021-03-19 | 2021-07-13 | 龙门金南磁性材料有限公司 | Preparation method of bronze-coated iron composite powder |
| CN115722675A (en) * | 2022-11-27 | 2023-03-03 | 河南可迪菲新材料科技有限公司 | Preparation method of modified fine copper powder suitable for copper slurry |
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| GB1123685A (en) * | 1965-03-17 | 1968-08-14 | Birmingham Small Arms Co Ltd | Improvements in or relating to metal powders and articles produced therefrom |
| JPS5950101A (en) * | 1982-09-17 | 1984-03-23 | Kawasaki Steel Corp | Iron powder coated with bronze and its manufacture |
| JP3094018B1 (en) * | 1999-06-23 | 2000-10-03 | 福田金属箔粉工業株式会社 | Method for producing Fe-Cu composite powder |
| CN1868637A (en) * | 2005-05-25 | 2006-11-29 | 成都市同心元新材料有限公司 | Copper alloy coated composite powder and its preparation method |
| TW200738375A (en) * | 2006-03-02 | 2007-10-16 | Scm Metal Products Inc | Low cost bronze powder for high performance bearings |
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| GB1123685A (en) * | 1965-03-17 | 1968-08-14 | Birmingham Small Arms Co Ltd | Improvements in or relating to metal powders and articles produced therefrom |
| JPS5950101A (en) * | 1982-09-17 | 1984-03-23 | Kawasaki Steel Corp | Iron powder coated with bronze and its manufacture |
| JP3094018B1 (en) * | 1999-06-23 | 2000-10-03 | 福田金属箔粉工業株式会社 | Method for producing Fe-Cu composite powder |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672170A (en) * | 2012-06-12 | 2012-09-19 | 夏德虎 | Bronze-coated iron composite powder |
| CN103203457A (en) * | 2013-04-15 | 2013-07-17 | 河北钢铁股份有限公司邯郸分公司 | Method for manufacturing iron-copper alloy from iron oxide red and copper sulfate |
| CN104493184A (en) * | 2014-11-27 | 2015-04-08 | 南京大学 | Manufacturing method of spherical bronze alloy powder |
| CN104493184B (en) * | 2014-11-27 | 2017-08-22 | 南京大学 | The manufacture method of spherical bell metal 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 |
| CN108580918B (en) * | 2018-05-21 | 2020-01-24 | 金川集团股份有限公司 | Production method of copper-iron diffusion powder |
| CN108580918A (en) * | 2018-05-21 | 2018-09-28 | 金川集团股份有限公司 | A kind of production method of copper and iron spread powder |
| CN110369730A (en) * | 2019-08-16 | 2019-10-25 | 四川容克斯科技有限公司 | A kind of copper-clad iron powder and preparation method thereof |
| CN110369730B (en) * | 2019-08-16 | 2022-02-22 | 四川容克斯科技有限公司 | Copper-coated iron powder and preparation method thereof |
| CN110523972A (en) * | 2019-09-20 | 2019-12-03 | 四川容克斯科技有限公司 | A kind of production system of copper-clad iron powder |
| CN111451519A (en) * | 2020-04-03 | 2020-07-28 | 龙门金南磁性材料有限公司 | Preparation method of brass-coated iron powder |
| CN113102748A (en) * | 2021-03-19 | 2021-07-13 | 龙门金南磁性材料有限公司 | Preparation method of bronze-coated iron composite powder |
| CN115722675A (en) * | 2022-11-27 | 2023-03-03 | 河南可迪菲新材料科技有限公司 | Preparation method of modified fine copper powder suitable for copper slurry |
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Application publication date: 20121128 |