CN102029399A - Gas-solid reduction direct production method of high-speed tool steel powder - Google Patents
Gas-solid reduction direct production method of high-speed tool steel powder Download PDFInfo
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- CN102029399A CN102029399A CN 201010573329 CN201010573329A CN102029399A CN 102029399 A CN102029399 A CN 102029399A CN 201010573329 CN201010573329 CN 201010573329 CN 201010573329 A CN201010573329 A CN 201010573329A CN 102029399 A CN102029399 A CN 102029399A
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Abstract
The invention relates to a gas-solid reduction direct production method of high-speed tool steel powder for producing high-speed tool steel powder containing elements of 60-80% of iron, 4-6% of chromium, 0.5-8% of cobalt, 6-18% of tungsten, 6-18% of molybdenum, 5-2% of carbon and the like through reduction reaction of composite oxide powder containing elements of 60-80% of iron, 4-6% of chromium, 0.5-8% of cobalt, 6-18% of tungsten, 6-18% of molybdenum and the like, under the atmosphere of reducing gas. The reducing gas comprises the gas containing a hydrogen element, such as natural gas, coal gas and the like.
Description
The high-speed tool steel-product that the high-speed tool powdered steel that obtains by atomization production is made through powder metallurgy method such as annealing, cold-press moulding, sintering is called the powder high-speed tool steel.The powder high-speed tool steel is top grade in the high-speed tool steel, its feature is regardless of size and shape, the microscopic structure characteristics that powder high-speed tool steel have all that carbide particle is tiny, inclusion content is few, be evenly distributed etc. are significantly improved bending strength, hardness and the cutting ability of high-speed steel.
One of key technology of producing the powder high-speed tool steel is the production method of high-speed tool powdered steel.The atomization that adopts, Dual-Phrase Distribution of Gas olid atomization etc. are produced the method for high-speed tool powdered steel at present, and employed raw material is and the steel of high-speed tool steel with sample ingredient.The present invention adopts composite oxides to reduce in reducibility gas and directly produces the high-speed tool powdered steel, and this meets the low-carbon economy development, and relevant at present document and patent are not appeared in the newspapers.
The composite oxide power that the present invention relates to contain elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums carries out reduction reaction in reducibility gas atmosphere, produce the direct production method of gas-solid phase reduction reaction of high-speed tool powdered steel.
Reducibility gas comprises that natural gas, coal gas etc. contain the gas of protium.
Realize the technical scheme of production method of the present invention, comprise the following steps:
1, raw material is prepared: with an amount of solubility Fe, Cr, Co salt and NaOH is raw material, adopts liquid-phase coprecipitation to produce the composite oxides precipitation of Fe, Cr, Co three elements, and precipitate with deionized water is washed till neutral stand-by.With an amount of solubility Fe salt and ammonium tungstate is raw material, adopts liquid-phase coprecipitation to produce FeWO
4Precipitate stand-by.With an amount of solubility Fe salt and ammonium molybdate is raw material, adopts liquid-phase coprecipitation to produce FeMoO
4Precipitate stand-by.Composite oxides precipitation, FeWO with Fe, Cr, Co three elements
4Precipitation and FeMoO
4Be deposited in the deionized water and mix, filter, drying obtains containing the composite oxide power of elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums.
2, produce preparation: system places the exhaust flow path state the gas-solid phase continuous reactor of closed circulation, uses the nitrogen deaeration.Again closed circulation gas-solid phase continuous reactor system is placed closed circulation stream state, feed an amount of reducibility gas.Open gas pump under closed state reducibility gas is circulated in system, reduction furnace is warming up to required temperature constant temperature.
3, produce continuously: with raw material input device raw material is input in the boiler tube, with the raw material pushing in device raw material is pushed in the porcelain boat what flat-temperature zone that fills raw material singly continuously and carry out reduction reaction, the speed that pushes raw material is determined according to technological parameter.Technological process is: raw material → dress sample → continuous high-speed tool steel powder-product from the injection port sample introduction → reduction → cooling → elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums and 0.5～2% carbon of coming out of the stove → contain from outlet continuously.When the decline of pressure in the system, suitably mend reducibility gas, pressure is little negative pressure in the maintenance system.
4, the packing of product: particle diameter is directly packed into greater than 1 micron high-speed tool powdered steel in the thick matter polybag, the 25Kg papery of packing into pail pack; Less than 1 micron, especially nano level high-speed tool powdered steel is incorporated with the 1Kg irony pail pack of protective atmosphere.
Embodiment 1:
1, raw material is prepared: with an amount of solubility Fe, Cr, Co salt and NaOH is raw material, adopts liquid-phase coprecipitation to produce the nanoscale composite oxides precipitation of Fe, Cr, Co three elements, and precipitate with deionized water is washed till neutral stand-by.With an amount of solubility Fe salt and ammonium tungstate is raw material, adopts liquid-phase coprecipitation to produce nanoscale FeWO
4Precipitate stand-by.With an amount of solubility Fe salt and ammonium molybdate is raw material, adopts liquid-phase coprecipitation to produce nanoscale FeMoO
4Precipitate stand-by.Nanoscale composite oxides precipitation, nanoscale FeWO with Fe, Cr, Co three elements
4Precipitation and nanoscale FeMoO
4Be deposited in the deionized water and mix, filter, drying obtains containing the nanoscale composite oxide power of elements such as 77% iron, 4% chromium, 2% cobalt, 11% tungsten, 6% molybdenum.
2, produce preparation: system places the exhaust flow path state the gas-solid phase continuous reactor of closed circulation, uses the nitrogen deaeration.Again closed circulation gas-solid phase continuous reactor system is placed closed circulation stream state, feed an amount of reducibility gas.Open gas pump under closed state reducibility gas is circulated in system, reduction furnace is warming up to 600～1000 ℃ of constant temperature.
3, produce continuously: with raw material input device raw material is input in the boiler tube, with the raw material pushing in device raw material is pushed in the porcelain boat what flat-temperature zone that fills raw material singly continuously and carry out reduction reaction, the speed that pushes raw material is determined according to technological parameter.Technological process is: raw material → dress sample → continuously is from injection port sample introduction → reduction → cooling → come out of the stove → nano level high-speed tool steel powder-product from outlet continuously.The decline of pressure suitably mends reducibility gas in the system, and pressure is little negative pressure in the maintenance system.
4, the packing of product: nano level high-speed tool powdered steel is incorporated with the 1Kg irony pail pack of protective atmosphere.
Embodiment 2:
1, raw material is prepared: with solubility Fe, Cr, Co salt and NaOH is raw material, adopts liquid-phase coprecipitation to produce the micron order composite oxides precipitation of Fe, Cr, Co three elements, and precipitate with deionized water is washed till neutral stand-by.With solubility Fe salt and ammonium tungstate is raw material, adopts liquid-phase coprecipitation to produce micron order FeWO
4Precipitate stand-by.With solubility Fe salt and ammonium molybdate is raw material, adopts liquid-phase coprecipitation to produce micron order FeMoO
4Precipitate stand-by.Micron order composite oxides precipitation, micron order FeWO with Fe, Cr, Co three elements
4Precipitation and micron order FeMoO
4Be deposited in the deionized water and mix, filter, drying obtains containing the micron order composite oxide power of elements such as 81% iron, 4% chromium, 2% cobalt, 8% tungsten, 5% molybdenum.
2, produce preparation: system places the exhaust flow path state the gas-solid phase continuous reactor of closed circulation, uses the nitrogen deaeration.Again closed circulation gas-solid phase continuous reactor system is placed closed circulation stream state, feed an amount of reducibility gas.Open gas pump under closed state reducibility gas is circulated in system, reduction furnace is warming up to 1000～1400 ℃ of constant temperature.
3, produce continuously: with raw material input device raw material is input in the boiler tube, with the raw material pushing in device raw material is pushed in the porcelain boat what flat-temperature zone that fills raw material singly continuously and carry out reduction reaction, the speed that pushes raw material is determined according to technological parameter.Technological process is: raw material → dress sample → continuously is from injection port sample introduction → reduction → cooling → come out of the stove → the high-speed tool steel powder-product from outlet continuously.The decline of pressure suitably mends reducibility gas in the system, and pressure is little negative pressure in the maintenance system.
4, the packing of product: micron-sized high-speed tool powdered steel is directly packed in the thick matter polybag, the 25Kg papery of packing into pail pack.
Claims (3)
1. the composite oxide power that contains elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums carries out reduction reaction in 1000～1400 ℃ of scopes in reducibility gas atmosphere, produce the direct production method of gas-solid phase reduction reaction of the high-speed tool powdered steel that contains elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums and 0.5～2% carbon.
2. the nano composite oxide powder that contains elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums carries out reduction reaction in 600～1000 ℃ of scopes in reducibility gas atmosphere, produce the direct production method of gas-solid phase reduction reaction of the nanometer high-speed tool powdered steel that contains elements such as 60～80% iron, 4～6% chromium, 0.5～8% cobalt, 6～18% tungsten, 6～18% molybdenums and 0.5～2% carbon.
3. reducibility gas comprises that natural gas, coal gas etc. contain the gas of protium in the claim 1,2.
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| CN 201010573329 CN102029399A (en) | 2010-12-06 | 2010-12-06 | Gas-solid reduction direct production method of high-speed tool steel powder |
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| CN 201010573329 CN102029399A (en) | 2010-12-06 | 2010-12-06 | Gas-solid reduction direct production method of high-speed tool steel powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290415A (en) * | 2015-11-14 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | Direct production method for high-molybdenum tool steel powder |
| CN105290416A (en) * | 2015-11-15 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | Direct production method for high-tungsten tool steel powder |
Citations (4)
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| US3591362A (en) * | 1968-03-01 | 1971-07-06 | Int Nickel Co | Composite metal powder |
| JPH10324901A (en) * | 1997-05-23 | 1998-12-08 | Daido Steel Co Ltd | Alloy powder for powder metallurgy and production thereof |
| CN1393310A (en) * | 2001-06-22 | 2003-01-29 | 中国科学院金属研究所 | Process for preparing nano-class composite W-Cu powder |
| CN101134243A (en) * | 2007-09-26 | 2008-03-05 | 中南大学 | Ultra-fine or nanometer molybdenum cuprum composite powder and method of producing the alloy thereof |
-
2010
- 2010-12-06 CN CN 201010573329 patent/CN102029399A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3591362A (en) * | 1968-03-01 | 1971-07-06 | Int Nickel Co | Composite metal powder |
| JPH10324901A (en) * | 1997-05-23 | 1998-12-08 | Daido Steel Co Ltd | Alloy powder for powder metallurgy and production thereof |
| CN1393310A (en) * | 2001-06-22 | 2003-01-29 | 中国科学院金属研究所 | Process for preparing nano-class composite W-Cu powder |
| CN101134243A (en) * | 2007-09-26 | 2008-03-05 | 中南大学 | Ultra-fine or nanometer molybdenum cuprum composite powder and method of producing the alloy thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290415A (en) * | 2015-11-14 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | Direct production method for high-molybdenum tool steel powder |
| CN105290416A (en) * | 2015-11-15 | 2016-02-03 | 丹阳市蓝锐粉末合金制品有限公司 | Direct production method for high-tungsten tool steel powder |
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Application publication date: 20110427 |