CN105345014A - Preparation method for novel pre-alloy powder - Google Patents
Preparation method for novel pre-alloy powder Download PDFInfo
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- CN105345014A CN105345014A CN201510775222.5A CN201510775222A CN105345014A CN 105345014 A CN105345014 A CN 105345014A CN 201510775222 A CN201510775222 A CN 201510775222A CN 105345014 A CN105345014 A CN 105345014A
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Abstract
The invention provides a preparation method for novel pre-alloy powder. The preparation method includes the steps that mixing ball-milling is carried out on salt powder of a carcass element, and the super-fine pre-alloy powder is obtained through reduction and crushing. In this way, the preparation method is simple in process, small in powder particle and low in cost. By means of the obtained super-fine pre-alloy powder, the sintering temperature can be decreased, the sintering density is improved, the alloying degree and the uniformity degree of the element are strengthened, the grain size is refined, the mechanical property and the cutting performance are accordingly improved, and the service life is accordingly prolonged.
Description
Invention field
The present invention relates to a kind of preparation method of New Pre alloyed powder, be applied to the manufacture of diamond tool.
Background of invention
As everyone knows, the performance of diamond tool depends on the character of carcass to a great extent, and therefore, the research about carcass powder is subject to paying close attention to widely in industry.Adopt pre-alloyed powder as diamond tool tyre case, have the following advantages:
(1) carcass of heterogeneity can be selected according to the performance of target, improve the specific aim of the use of instrument;
(2) diamond tool adopting pre-alloyed powder to manufacture, improves the compactness of carcass and uniformity thus improves the state of wear of carcass;
(3) diamond tool adopting pre-alloyed powder to manufacture, can improve the ability that carcass plates it, and shock resistance is better;
(4) pre-alloyed powder is not oxidizable, and it is convenient to preserve, and can simplify the manufacturing process of instrument, obtains good economic benefit.
Therefore, about the research of carcass powder is subject to paying close attention to widely in industry.Pre-alloyed powder due to its sintering temperature low, hold property good, sharpness is high, cost is low and enjoy favor, applies also expanding day, becomes the development trend in diamond tool field.
At present, most of diamond saw blade, coring bit and other diamond tool are except with except cobalt powder in the world, have all applied the pre-alloyed powder of relative scale.China gradually adopted hydraulic atomized legal system to get prealloy powder in recent years, mainly be devoted to the research of the aspects such as pre-alloyed powder proportioning, sintering character, physical and mechanical properties, granularity refinement, laser welding, to obtain low cost, high performance pre-alloyed powder, improve diamond tool combination property.
In recent years, along with user is to the raising day by day of diamond saw blade performance requirement, research and development had not only had higher cutting-rate but also had becomes study hotspot compared with the diamond saw blade of long life.The performance of saw blade not merely depends on diamond, but the overall performance of this composite of the cutter head depending on diamond appropriately to coordinate with bonding agent and form.This relates to the type of bonding agent, proportioning components, relative density (porosity), metallographic structure, mechanical performance and the combining form between bonding agent and diamond, so the preparation technology of Studies of The Superfine pre-alloyed powder and sintering character, there is very important meaning to the cutting ability improving diamond saw blade.
Summary of the invention
The invention provides a kind of preparation method of New Pre alloyed powder, comprise the salt powders mixing and ball milling of carcass element, then obtain ultra-fine prealloy powder through reduction and fragmentation, it is characterized in that comprising the steps:
(1) take copper nitrate and ferric nitrate in the ratio of Fe70%-Cu30% (FeCu30), load ball milling 24-72 hour in high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with cracked ammonium or hydrogen reducing, reduction temperature 650-750 DEG C, recovery time 1-2 hour;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 1 hour through ball milling.
The present invention adopts the salt of carcass element as raw material, and its advantage is that salt is highly brittle, easily levigate in Process During High Energy Ball Milling, even reaches nanoscale.Like this can the reduction process of accelerated oxidation thing, the more important thing is the atoms permeating distance shortening element, be easy to realize alloying, thus complete reduction and alloying at temperature that can be lower, in the shorter time, avoid that reduction temperature is high causes particle growth, make the granularity of final prealloy powder tiny, reach less than 5 microns.Therefore, method technique of the present invention is simple, and powder particle is tiny, and cost is low.
The ultra-fine prealloy powder obtained like this can reduce sintering temperature, improves sintered density, strengthens the alloying level of element and uniformity coefficient, refining grain size, thus reaches and improve mechanical property and cutting ability and service life.
Detailed description of the invention
Diamond saw blade production process comprises the processes such as steel matrix processing, batch mixing, hot pressed sintering, welding, wherein sintering is most important one critical process during diamond saw blade is produced, and the quality of sintering process directly affects the cutter head density of diamond saw blade, hardness and cutting ability.Thus improve the sintering activity of metal dust, reduce the sintering temperature of carcass, reduce, to adamantine damage, diamond saw piece performance can be improved.In addition, each element of carcass powder is needed abundant alloying in sintering process, the function of each element of competence exertion.Element powders particle needs diffusion in sintering process to realize alloying, therefore in advance by element alloyed, namely using prealloy powder obviously can shorten the diffusion-alloying time of element when sintering, can reduce equally adamantine damage.Generally speaking, ultra-fine prealloy powder is used can to significantly improve adamantine combination property.
The preparation method of ultra-fine prealloy powder of the present invention, comprises the salt powders mixing and ball milling of carcass element, then obtains ultra-fine prealloy powder through reduction and fragmentation, it is characterized in that comprising the steps:
(1) take copper nitrate and ferric nitrate in the ratio of Fe70%-Cu30% (FeCu30), load ball milling 24-72 hour in high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with cracked ammonium or hydrogen reducing, reduction temperature 650-750 DEG C, recovery time 1-2 hour;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 1 hour through ball milling.
The present invention adopts the salt of carcass element as raw material, and its advantage is that salt is highly brittle, easily levigate in Process During High Energy Ball Milling, even reaches nanoscale.Like this can the reduction process of accelerated oxidation thing, the more important thing is the atoms permeating distance shortening element, be easy to realize alloying, thus complete reduction and alloying at temperature that can be lower, in the shorter time, avoid that reduction temperature is high causes particle growth, make the granularity of final prealloy powder tiny, reach less than 5 microns.The ultra-fine prealloy powder obtained like this can reduce sintering temperature, improves sintered density, strengthens the alloying level of element and uniformity coefficient, refining grain size, thus reaches and improve mechanical property and cutting ability and service life.
Embodiment 1
(1) copper nitrate and ferric nitrate is taken in the ratio of Fe70%-Cu30% (FeCu30), ball milling 24 hours in loading high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with cracked ammonium reduction, reduction temperature 750 DEG C, 1 hour recovery time;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 1 hour through ball milling.
Embodiment 2
(1) copper nitrate and ferric nitrate is taken in the ratio of Fe70%-Cu30% (FeCu30), ball milling 72 hours in loading high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with hydrogen reducing, reduction temperature 650 DEG C, 2 hours recovery times;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 2 hours through ball milling.
Embodiment 3
(1) copper nitrate and ferric nitrate is taken in the ratio of Fe70%-Cu30% (FeCu30), ball milling 48 hours in loading high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with cracked ammonium reduction, reduction temperature 700 DEG C, 1.5 hours recovery times;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 1 hour through ball milling.
Claims (1)
1. a preparation method for New Pre alloyed powder, is characterized in that comprising the salt powders mixing and ball milling by carcass element, then obtains ultra-fine prealloy powder through reduction and fragmentation, comprises the steps:
(1) take copper nitrate and ferric nitrate in the ratio of Fe70%-Cu30% (FeCu30), load ball milling 24-72 hour in high energy vibrations ball mill;
(2) levigate compound is loaded reduction furnace, with cracked ammonium or hydrogen reducing, reduction temperature 650-750 DEG C, recovery time 1-2 hour;
(3) powder of coming out of the stove disperses to obtain ultra-fine prealloy powder in 1 hour through ball milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510775222.5A CN105345014A (en) | 2015-11-15 | 2015-11-15 | Preparation method for novel pre-alloy powder |
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| CN201510775222.5A CN105345014A (en) | 2015-11-15 | 2015-11-15 | Preparation method for novel pre-alloy powder |
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| CN105345014A true CN105345014A (en) | 2016-02-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345020A (en) * | 2015-11-15 | 2016-02-24 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
| CN106048393A (en) * | 2016-07-19 | 2016-10-26 | 西峡县泰祥实业有限公司 | Preparation method of diamond tool carcass powder FeCu30 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5249959A (en) * | 1975-10-20 | 1977-04-21 | Dowa Mining Co | Method to manufacture fee cu alloy having superior formability |
| JPS5297357A (en) * | 1976-02-13 | 1977-08-16 | Sony Corp | Method of making magnetic alloy powder containing iron and copper as main constituents |
| CN101628338A (en) * | 2009-08-07 | 2010-01-20 | 深圳市新宏泰粉末冶金有限公司 | Superfine iron-copper alloy powder and preparation method thereof |
| CN102794449A (en) * | 2012-03-21 | 2012-11-28 | 朱湖泽 | Method for producing copper coated iron powder |
| CN104128613A (en) * | 2014-08-20 | 2014-11-05 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
| CN105345020A (en) * | 2015-11-15 | 2016-02-24 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
-
2015
- 2015-11-15 CN CN201510775222.5A patent/CN105345014A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249959A (en) * | 1975-10-20 | 1977-04-21 | Dowa Mining Co | Method to manufacture fee cu alloy having superior formability |
| JPS5297357A (en) * | 1976-02-13 | 1977-08-16 | Sony Corp | Method of making magnetic alloy powder containing iron and copper as main constituents |
| CN101628338A (en) * | 2009-08-07 | 2010-01-20 | 深圳市新宏泰粉末冶金有限公司 | Superfine iron-copper alloy powder and preparation method thereof |
| CN102794449A (en) * | 2012-03-21 | 2012-11-28 | 朱湖泽 | Method for producing copper coated iron powder |
| CN104128613A (en) * | 2014-08-20 | 2014-11-05 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
| CN105345020A (en) * | 2015-11-15 | 2016-02-24 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345020A (en) * | 2015-11-15 | 2016-02-24 | 丹阳市德源精密工具有限公司 | Preparation method for pre-alloyed powder |
| CN106048393A (en) * | 2016-07-19 | 2016-10-26 | 西峡县泰祥实业有限公司 | Preparation method of diamond tool carcass powder FeCu30 |
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