CN102672170A - Bronze-coated iron composite powder - Google Patents
Bronze-coated iron composite powder Download PDFInfo
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- CN102672170A CN102672170A CN2012101922695A CN201210192269A CN102672170A CN 102672170 A CN102672170 A CN 102672170A CN 2012101922695 A CN2012101922695 A CN 2012101922695A CN 201210192269 A CN201210192269 A CN 201210192269A CN 102672170 A CN102672170 A CN 102672170A
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Abstract
The invention relates to a bronze-coated iron composite powder, comprising the following components by weight percent based on the total weight of the composite powder: 18%-20% of copper, 1.8%-2% of tin and the balance of iron. A preparation method of the bronze-coated iron composite powder comprises the following steps of: according to the set components of the bronze-coated iron composite powder, respectively weighing copper oxide powder, tin powder and iron powder with proper quantity; firstly, putting the weighed copper oxide powder and pure iron powder in a ball mill or a mixer to be evenly mixed, and adding the tin powder to be mixed; and transferring the evenly-mixed power into a reduction furnace, and carrying out reducing dispersing under the protection of the ammonia decomposition gas or the ammonia burning atmosphere. The bronze-coated iron composite powder has the benefit effects of being simple in production technology, and low in production cost. A copper layer on the surface of the bronze-coated iron particle prepared by the invention is integrated and compact, so that the quality of the bronze-coated iron composite powder can be guaranteed. The preparation process is free of the discharge of harmful substances, so that the environmental pollution and destruction can be avoided.
Description
Technical field
The present invention relates to a kind of copper alloy powder, relate in particular to a kind 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:
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; 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) 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.
2) with respect to prior art, saved the middle operation of preparation bronze-coated iron composite powder, further controlled cost.Cheap 4000 yuan per ton of copper tin iron clad prescription unit prices than copper-clad iron formula unit price.Reduced the cost of raw material.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.
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. 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 said bronze-coated iron composite powder makes through following concrete steps:
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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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101922695A CN102672170A (en) | 2012-06-12 | 2012-06-12 | Bronze-coated iron composite powder |
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| CN2012101922695A CN102672170A (en) | 2012-06-12 | 2012-06-12 | Bronze-coated iron composite powder |
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| CN102672170A true CN102672170A (en) | 2012-09-19 |
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| CN2012101922695A Pending CN102672170A (en) | 2012-06-12 | 2012-06-12 | Bronze-coated iron composite powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55164050A (en) * | 1979-06-08 | 1980-12-20 | Nippon Funmatsu Gokin Kk | Sliding frictional material |
| CN1920074A (en) * | 2006-09-15 | 2007-02-28 | 重庆华浩冶炼有限公司 | Iron bronze composite powder and preparation method thereof |
| CN102794457A (en) * | 2012-03-21 | 2012-11-28 | 朱湖泽 | Method for producing bronze coated iron powder |
-
2012
- 2012-06-12 CN CN2012101922695A patent/CN102672170A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55164050A (en) * | 1979-06-08 | 1980-12-20 | Nippon Funmatsu Gokin Kk | Sliding frictional material |
| CN1920074A (en) * | 2006-09-15 | 2007-02-28 | 重庆华浩冶炼有限公司 | Iron bronze composite powder and preparation method thereof |
| CN102794457A (en) * | 2012-03-21 | 2012-11-28 | 朱湖泽 | Method for producing bronze coated iron powder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
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Application publication date: 20120919 |