CN105562681A - High-temperature heat treatment method for metal powder - Google Patents
High-temperature heat treatment method for metal powder Download PDFInfo
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- CN105562681A CN105562681A CN201610072811.1A CN201610072811A CN105562681A CN 105562681 A CN105562681 A CN 105562681A CN 201610072811 A CN201610072811 A CN 201610072811A CN 105562681 A CN105562681 A CN 105562681A
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- Prior art keywords
- heat treatment
- powder
- temperature
- metal powder
- metal dust
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/10—Inert gases
- B22F2201/11—Argon
Abstract
The invention discloses a high-temperature heat treatment method for metal powder, relating to metal powder and provides the high-temperature heat treatment method for metal powder, which is simple in process equipment, low in cost and suitable for continuous production. The high-temperature heat treatment method comprises the steps of mixing metal powder to be treated with sodium chloride, then, placing the mixture into a heat treatment furnace to carry out heat treatment, then, preserving the heat, and next, carrying out furnace cooling to room temperature to obtain mixed powder; placing the mixed powder subjected to heat treatment into distilled water to dissolve sodium chloride in the mixed powder; and then, filtering out the metal powder in water, and drying to obtain the required metal powder subjected to heat treatment. The metal powder cannot react with sodium chloride; the adopted heat treatment temperature needs to be determined according to the physical properties of the metal powder to be treated, and the operating temperature recommended by related heat treatment procedures is adopted; the treated powder does not react with water at normal temperature; the metal powder and sodium chloride powder can be mixed at different ratios; and the applicable heat treatment temperature is lower than 800 DEG C.
Description
Technical field
The present invention relates to metal dust, especially relate to a kind of high-temperature heat treatment method of metal dust.
Background technology
Metal dust is the raw material in a kind of engineering field with extensive use.Metal dust has the features such as size is little, specific area is large, has many performances being different from common metal block materials, as special mechanical property, electricity/magnetic property and reactivity etc. with the parts of metal powder preparation.These special performances make metal dust be used widely relating to numerous engineering field such as powder metallurgy, thermal spraying.
Under many circumstances, dusty material needs to carry out pre-treatment according to application conditions before use.Need as there being the application scenario of particular/special requirement at some to carry out high-temperature heat treatment to metal dust, to obtain comparatively coarse grain or other particular tissues and performance.And the problem that metal dust ubiquity in high-temperature heat treatment process is powder sintered, the powder particle namely originally with good dispersion and mobility can sinter reluctant bulk after heat treatment into, causes it normally to use.Therefore, seek new method solution metal dust high-temperature heat treatment Sintering Problem and there is important practical usage.
Chinese patent CN101189089 discloses a kind of method of being heat-treated metal dust and/or metal oxide powder by microwave energy, heat-treats to form heat treated powder to described powder by microwave energy.
Chinese patent CN2335106 discloses a kind of equipment metal dust being carried out to middle high-temperature heat treatment.Boiler tube adopts inwall to have quartz ampoule or the earthenware of intermittent screw thread projection and axial long fin.Boiler tube moves by gripper and with double V-shaped pulley and supports, and rotary speed is adjustable, and gradient is adjustable, blanking velocity is adjustable, after multistage V-type tower and cooling grid cool fast, enter collecting bin after metal powder heat treatment, not sticky furnace wall, realizes the dynamic continuous heat of metal powder.
Summary of the invention
The object of the invention is to the problems referred to above for existing in existing metal dust heat treatment, provide process equipment simple, cost is low, is suitable for the high-temperature heat treatment method of a kind of metal dust of quantity-produced.
Concrete steps of the present invention are as follows:
1) pending metal dust mixed to be placed in heat-treatment furnace with sodium chloride powder be incubated after heat treatment, after cool to room temperature with the furnace, obtain mixed-powder;
2) distilled water will be placed in through heat treated mixed-powder, dissolve the sodium chloride in mixed-powder; Again the metal dust in water is leached, dries, obtain required heat treating metal powder.
In step 1) in, the mass ratio of described pending metal dust and sodium chloride powder can be 1: 2; Described heat-treatment furnace can adopt vacuum heat treatment furnace or inert atmosphere heat-treatment furnace; Described inert gas can adopt argon gas etc.; Described heat treated temperature can be 700 ~ 800 DEG C; The time of described insulation can be 24h.
The employing program is heat-treated, and metal dust can not react with sodium chloride; The heat treatment temperature taked need be determined according to the physical property of pending metal dust, adopts the serviceability temperature that relevant specification of heat treatment is recommended; Handled powder is the metal dust do not reacted with water under normal temperature; Minority active strong alkali metal, alkaline-earth metal, if potassium, sodium, magnesium etc. are not within program range of application.
Metal dust and sodium chloride powder can have different mixing proportion; The heat treatment temperature that is suitable for be less than 800 DEG C.
Accompanying drawing explanation
Fig. 1 is the metallograph through corrosion particle section before the copper powder high-temperature heat treatment of the embodiment of the present invention.
Fig. 2 is the metallograph of particle section after the copper powder 700 DEG C × 24h heat treatment of the embodiment of the present invention.
Detailed description of the invention
Embodiment 1 (for pure copper powder):
Get powder size d (0.1)=55.2 μm, the pure copper powder 60g of d (0.5)=99.1 μm, d (0.9)=183.1 μm; Get commercially thin edible salt 120g; Above-mentioned pure copper powder and edible salt are fully mixed and are placed in Ar atmosphere furnace, be warming up to 700 DEG C, be incubated 24h at this temperature, after cool to room temperature with the furnace; In whole intensification, insulation, the cold process of stove, pass into Ar continuously, cause Powder Oxidation to avoid leaking-in air in stove.Take out mixed-powder in stove, be placed in distilled water, fully dissolve the salt in mixed-powder, leach copper powder, rinse, dry, namely obtain the required pure copper powder through high-temperature heat treatment.
Through corroding the metallograph of particle section see Fig. 1 before copper powder high-temperature heat treatment, after copper powder 700 DEG C × 24h heat treatment, the metallograph of particle section is see Fig. 2.
Embodiment 2
Similar to Example 1, its difference is above-mentioned pure copper powder and edible salt fully to mix to be placed in Ar atmosphere furnace, is warming up to 800 DEG C.
Claims (5)
1. a high-temperature heat treatment method for metal dust, is characterized in that its concrete steps are as follows:
1) pending metal dust mixed to be placed in heat-treatment furnace with sodium chloride powder be incubated after heat treatment, after cool to room temperature with the furnace, obtain mixed-powder;
2) distilled water will be placed in through heat treated mixed-powder, dissolve the sodium chloride in mixed-powder; Again the metal dust in water is leached, dries, obtain required heat treating metal powder.
2. the high-temperature heat treatment method of a kind of metal dust as claimed in claim 1, is characterized in that in step 1) in, the mass ratio of described pending metal dust and sodium chloride powder is 1: 2.
3. the high-temperature heat treatment method of a kind of metal dust as claimed in claim 1, is characterized in that in step 1) in, described heat-treatment furnace adopts vacuum heat treatment furnace or inert atmosphere heat-treatment furnace.
4. the high-temperature heat treatment method of a kind of metal dust as claimed in claim 1, is characterized in that in step 1) in, described inert gas adopts argon gas.
5. the high-temperature heat treatment method of a kind of metal dust as claimed in claim 1, is characterized in that in step 1) in, described heat treated temperature is 700 ~ 800 DEG C; The time of described insulation is 24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610072811.1A CN105562681B (en) | 2016-02-02 | 2016-02-02 | A kind of high-temperature heat treatment method of metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610072811.1A CN105562681B (en) | 2016-02-02 | 2016-02-02 | A kind of high-temperature heat treatment method of metal powder |
Publications (2)
| Publication Number | Publication Date |
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| CN105562681A true CN105562681A (en) | 2016-05-11 |
| CN105562681B CN105562681B (en) | 2018-09-25 |
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| CN201610072811.1A Active CN105562681B (en) | 2016-02-02 | 2016-02-02 | A kind of high-temperature heat treatment method of metal powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097948A (en) * | 2017-12-22 | 2018-06-01 | 北京机科国创轻量化科学研究院有限公司 | A kind of anti-oxidation high-temperature heat treatment method of metal alloy attritive powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121441A (en) * | 1982-06-10 | 1983-12-21 | Westinghouse Electric Corp | Process for upgrading metal powder |
| US5800636A (en) * | 1996-01-16 | 1998-09-01 | Tdk Corporation | Dust core, iron powder therefor and method of making |
| JP2002057020A (en) * | 2000-08-11 | 2002-02-22 | Daido Steel Co Ltd | Method of manufacturing powder for dust core and dust core manufactured thereby |
| CN101428348A (en) * | 2008-07-29 | 2009-05-13 | 张建玲 | Process for producing spherical submicron metal with hydro-thermal treatment |
| CN102678798A (en) * | 2012-04-13 | 2012-09-19 | 江苏安捷汽车配件有限公司 | Manufacture method of automobile brake pad |
-
2016
- 2016-02-02 CN CN201610072811.1A patent/CN105562681B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121441A (en) * | 1982-06-10 | 1983-12-21 | Westinghouse Electric Corp | Process for upgrading metal powder |
| US5800636A (en) * | 1996-01-16 | 1998-09-01 | Tdk Corporation | Dust core, iron powder therefor and method of making |
| JP2002057020A (en) * | 2000-08-11 | 2002-02-22 | Daido Steel Co Ltd | Method of manufacturing powder for dust core and dust core manufactured thereby |
| CN101428348A (en) * | 2008-07-29 | 2009-05-13 | 张建玲 | Process for producing spherical submicron metal with hydro-thermal treatment |
| CN102678798A (en) * | 2012-04-13 | 2012-09-19 | 江苏安捷汽车配件有限公司 | Manufacture method of automobile brake pad |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097948A (en) * | 2017-12-22 | 2018-06-01 | 北京机科国创轻量化科学研究院有限公司 | A kind of anti-oxidation high-temperature heat treatment method of metal alloy attritive powder |
| CN108097948B (en) * | 2017-12-22 | 2019-11-05 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-temperature heat treatment method that metal alloy attritive powder is anti-oxidation |
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| CN105562681B (en) | 2018-09-25 |
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