CN103014393A - Hard alloy preparation method - Google Patents
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- CN103014393A CN103014393A CN2012105051867A CN201210505186A CN103014393A CN 103014393 A CN103014393 A CN 103014393A CN 2012105051867 A CN2012105051867 A CN 2012105051867A CN 201210505186 A CN201210505186 A CN 201210505186A CN 103014393 A CN103014393 A CN 103014393A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000000956 alloy Substances 0.000 title abstract 10
- 229910045601 alloy Inorganic materials 0.000 title abstract 10
- 238000001238 wet grinding Methods 0.000 claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 23
- 238000000498 ball milling Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 10
- 239000004615 ingredient Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The invention relates to a hard alloy preparation method. The hard alloy preparation method comprises the steps of ingredient preparing, wet grinding, drying, pressing and sintering so as to obtain hard alloy. The hard alloy comprises the following ingredients in percentage by weight: 74.2%-74.5% of WC, 10.3%-10.8% of Co, 10.3%-10.8% of TaC, and 4.5%-5.2% of TiC. The hardness (HRA) of the hard alloy prepared by the method disclosed by the invention is 90.5-92, the strength of the hard alloy is more than or equal to 2450N/mm<2>, and the density of the hard alloy is 12.75-13 g/cm<3>. When the hard alloy with the properties is prepared into a numerical control blade for processing engines, the numerical control blade can be equipped with the properties of the hard alloy, thus being good in red hardness and high in wear resistance.
Description
Technical field
The present invention relates to a kind of preparation method of Wimet.
Background technology
Motor car engine is a kind of comparatively unmanageable product.Not only difficulty of processing is large but also add turning in man-hour temperature and rise very fast.The digital cuttings of present stage processing automobile engine use relies on external import blade mostly.Because add temperature height in man-hour, require processing blades that higher red hardness will be arranged.The blade that Wimet on the existing market is made can't adapt to such working conditions at all, is not that easy fragmentation is exactly that wear resistance is inadequate during use.
Summary of the invention
In order to address the above problem, the invention provides that a kind of technique is simple, the preparation method of the Wimet of the digital cuttings that is applicable to make the processing automobile engine.
To achieve these goals, the present invention is mainly solved by the following technical programs: a kind of preparation method of Wimet, comprise that batching, wet-milling, drying, compacting and sintering make Wimet, in the described batching step, batching comprises following composition: 74.2-74.5wt%WC, 10.3-10.8wt%Co, 10.3-10.5wt%TaC and 4.5-5.2wt%TiC.
As preferably, the Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 3um, Co is that the Fei Shi mean particle size of 1.5 um, TaC is 1.5um, and the Fisher particle size of TiC is 2.5um.
As preferably, this preparation method also comprises whipping step: after the wet-milling step, before the drying step, the batching after the wet-milling is stirred until it is even.
As preferably, batching after the above-mentioned stirring is dry by the drying tower that is filled with nitrogen after nozzle atomization, and spray-dired parameter is: oxygen level in the bore of nozzle: 1.0-1.3mm, atomizing pressure: 1000-1300Kpa, tower internal pressure≤4.1Kpa, the tower≤3.0%, nitrogen inlet temperature of stabilizer are that 200-210 ℃, nitrogen tower exit temperature are 90-100 ℃.
As preferably, above-mentioned wet-milling step is by the ball mill ball milling, and the ball milling parameter is: drum's speed of rotation is that 33-36rpm, stacking factor are 0.5, solid-to-liquid ratio is that 3:1, milling time are that 30-40 hour, ratio of grinding media to material are 4:1.
As preferably, in every kilogram above-mentioned batching, add 265ml concentration and be the alcohol of 92-94mol/L as ball-milling medium.
As preferably, above-mentioned pressing step adopts 20 tons of mouldenpresses, and the compacting parameter is: 8-12 beats/min.
As preferably, the hydrogen flow is in the above-mentioned sintering step: 5000-6000ml/h, and sintering temperature is: 1410 ℃-1440 ℃, pressurization: 5000Kpa.
The hardness (HRA) of the Wimet by aforesaid method preparation is that 90.5-92, intensity 〉=2450N/mm2, density are 12.75～13g/cm3.The present invention adopts 10.3-10.5wt%TaC to guarantee the red hardness of the blade made by the Wimet of aforesaid method preparation, the hardness of blade does not change when the blade processing temperature reaches more than 800 ℃, and the adding of TaC can be good at suppressing WC grain become large when sintering; Adopt 4.5-5.2wt%Ti can guarantee blade anti-crescent hollow abrasion when processing automobile starts of making by the Wimet of aforesaid method preparation, also increased the hardness of blade simultaneously; Adopting 10.3-10.8wt%Co is the toughness of blade when processing engine that assurance is made by the Wimet of aforesaid method preparation.So blade of making by the Wimet of aforesaid method preparation, the performance that has possessed this Wimet, blade with respect to prior art has following outstanding advantage: 1: red hardness is good, when processing temperature reaches more than 800 ℃, the hardness of blade changes hardly, be not easy broken 2: wear resistance is higher, prolongs 1-1.5 work-ing life doubly.
Embodiment
The below is described in further detail the embodiment of technical scheme of the present invention.
Embodiment 1: a kind of preparation method of Wimet comprises:
(1) batching: comprise following composition: 74.5wt%WC, 10.3wt%Co, 10.5wt%TaC and 4.7wt%TiC.
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 3um, Co is that the Fei Shi mean particle size of 1.5 um, TaC is 1.5um, and the Fisher particle size of TiC is 2.5um.
(2) wet-milling: in every kilogram batching, add 265ml concentration and be the alcohol of 92-94mol/L as ball-milling medium; The wet-milling step is by the ball mill ball milling, and the ball milling parameter is: drum's speed of rotation is that 33-36rpm, stacking factor are 0.5, solid-to-liquid ratio is that 3:1, milling time are that 30-40 hour, ratio of grinding media to material are 4:1.
(3) stir: stir until it is even after the batching after the above-mentioned wet-milling is removed impurity through 220 purpose wet screenings.Make its feedstock particle size by the nozzle ejection even after stirring mixes the batching after the wet-milling, reach at last substance in the later stage pressing process (fluctuation) error and reduce, improve the precision of product appearance size, improved compacting efficient.
(4) drying: the batching after will stirring is dry by the drying tower that is filled with nitrogen after nozzle atomization, realizes solid-liquid separation, liquids recovery and solid globules granulation, and the pellet of ejection enters in the charging basket by 40 order dry screens through the transmission of spiral cooling table, cooling.Spray-dired parameter is: oxygen level in the bore of nozzle: 1.0-1.3mm, atomizing pressure: 1000-1300Kpa, tower internal pressure≤4.1Kpa, the tower≤3.0%, nitrogen inlet temperature of stabilizer are that 200-210 ℃, nitrogen tower exit temperature are 90-100 ℃.
(5) compacting: pressing step adopts 20 tons of mouldenpresses, adjusts work loading height, pull-down stroke, pressing stroke and top and presses stroke, and compound is poured hopper into, begins the compacting debugging, after compacting finishes, takes out pressed compact; The compacting parameter is: 8-12 beats/min.
(6) sintering: the boat that product will be housed is loaded in by processing requirement to be sent on the coal charger in the stove, closes the upper furnace door sintering after carefully cleaning the oven door sealing band and evenly being coated with the last layer vacuum grease; The hydrogen flow is in the sintering step: 5000-6000ml/h, and sintering temperature is: 1410 ℃-1440 ℃, pressurization: 5000Kpa.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 91.5, intensity is 2550N/mm
2, density is 12.9g/cm
3The Wimet of such performance is made for the digital cuttings of processing engine, and it is because possessed the performance of Wimet itself, so red hardness is good, and wear resistance is high.
Embodiment 2: a kind of preparation method of Wimet comprises:
(1) batching: comprise following composition: 74.2wt%WC, 10.8wt%Co, 10.5wt%TaC and 4.5wt%TiC.
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 3um, Co is that the Fei Shi mean particle size of 1.5 um, TaC is 1.5um, and the Fisher particle size of TiC is 2.5um.
(2) wet-milling: in the batching at every kilogram, add 265ml concentration and be the alcohol of 92-94mol/L as ball-milling medium; The wet-milling step is by the ball mill ball milling, and the ball milling parameter is: drum's speed of rotation is that 33-36rpm, stacking factor are 0.5, solid-to-liquid ratio is that 3:1, milling time are that 30-40 hour, ratio of grinding media to material are 4:1.
(3) stir: stir until it is even after the batching after the above-mentioned wet-milling is removed impurity through 220 purpose wet screenings.Make its feedstock particle size by the nozzle ejection even after stirring mixes the batching after the wet-milling, reach at last substance in the later stage pressing process (fluctuation) error and reduce, improve the precision of product appearance size, improved compacting efficient.
(4) drying: the batching after will stirring is dry by the drying tower that is filled with nitrogen after nozzle atomization, realizes solid-liquid separation, liquids recovery and solid globules granulation, and the pellet of ejection enters in the charging basket by 40 order dry screens through the transmission of spiral cooling table, cooling.Spray-dired parameter is: oxygen level in the bore of nozzle: 1.0-1.3mm, atomizing pressure: 1000-1300Kpa, tower internal pressure≤4.1Kpa, the tower≤3.0%, nitrogen inlet temperature of stabilizer are that 200-210 ℃, nitrogen tower exit temperature are 90-100 ℃.
(5) compacting: pressing step adopts 20 tons of mouldenpresses, adjusts work loading height, pull-down stroke, pressing stroke and top and presses stroke, and compound is poured hopper into, begins the compacting debugging, after compacting finishes, takes out pressed compact; The compacting parameter is: 8-12 beats/min.
(6) sintering: the boat that product will be housed is loaded in by processing requirement to be sent on the coal charger in the stove, closes the upper furnace door sintering after carefully cleaning the oven door sealing band and evenly being coated with the last layer vacuum grease; The hydrogen flow is in the sintering step: 5000-6000ml/h, and sintering temperature is: 1410 ℃-1440 ℃, pressurization: 5000Kpa.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 92, intensity is 2450N/mm
2, density is 12.85g/cm
3The Wimet of such performance is made for the digital cuttings of processing engine, and it is because possessed the performance of Wimet itself, so red hardness is good, and wear resistance is high.
Embodiment 3: a kind of preparation method of Wimet comprises:
(1) batching: comprise following composition: 74.2wt%WC, 10.3wt%Co, 10.3wt%TaC and 5.2wt%TiC.
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 3um, Co is that the Fei Shi mean particle size of 1.5 um, TaC is 1.5um, and the Fisher particle size of TiC is 2.5um.
(2) wet-milling: in the batching at every kilogram, add 265ml concentration and be the alcohol of 92-94mol/L as ball-milling medium; The wet-milling step is by the ball mill ball milling, and the ball milling parameter is: drum's speed of rotation is that 33-36rpm, stacking factor are 0.5, solid-to-liquid ratio is that 3:1, milling time are that 30-40 hour, ratio of grinding media to material are 4:1.
(3) stir: stir until it is even after the batching after the above-mentioned wet-milling is removed impurity through 220 purpose wet screenings.Make its feedstock particle size by the nozzle ejection even after stirring mixes the batching after the wet-milling, reach at last substance in the later stage pressing process (fluctuation) error and reduce, improve the precision of product appearance size, improved compacting efficient.
(4) drying: the batching after will stirring is dry by the drying tower that is filled with nitrogen after nozzle atomization, realizes solid-liquid separation, liquids recovery and solid globules granulation, and the pellet of ejection enters in the charging basket by 40 order dry screens through the transmission of spiral cooling table, cooling.Spray-dired parameter is: oxygen level in the bore of nozzle: 1.0-1.3mm, atomizing pressure: 1000-1300Kpa, tower internal pressure≤4.1Kpa, the tower≤3.0%, nitrogen inlet temperature of stabilizer are that 200-210 ℃, nitrogen tower exit temperature are 90-100 ℃.
(5) compacting: pressing step adopts 20 tons of mouldenpresses, adjusts work loading height, pull-down stroke, pressing stroke and top and presses stroke, and compound is poured hopper into, begins the compacting debugging, after compacting finishes, takes out pressed compact; The compacting parameter is: 8-12 beats/min.
(6) sintering: the boat that product will be housed is loaded in by processing requirement to be sent on the coal charger in the stove, closes the upper furnace door sintering after carefully cleaning the oven door sealing band and evenly being coated with the last layer vacuum grease; The hydrogen flow is in the sintering step: 5000-6000ml/h, and sintering temperature is: 1410 ℃-1440 ℃, pressurization: 5000Kpa.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 90.8, intensity is 2750N/mm
2, density is 13g/cm
3The Wimet of such performance is made for the digital cuttings of processing engine, and it is because possessed the performance of Wimet itself, so red hardness is good, and wear resistance is high.
Claims (8)
1. the preparation method of a Wimet, comprise that batching, wet-milling, drying, compacting and sintering make Wimet, it is characterized in that in the described batching step, batching comprises following composition: 74.2-74.5wt%WC, 10.3-10.8wt%Co, 10.3-10.5wt%TaC and 4.5-5.2wt%TiC.
2. the preparation method of a kind of Wimet according to claim 1 is characterized in that, the Fei Shi mean particle size of described WC is that the Fei Shi mean particle size of 3um, Co is that the Fei Shi mean particle size of 1.5 um, TaC is 1.5um, and the Fisher particle size of TiC is 2.5um.
3. the preparation method of a kind of Wimet according to claim 1 and 2 is characterized in that, this preparation method also comprises whipping step: after the wet-milling step, before the drying step, the batching after the wet-milling is stirred until it is even.
4. the preparation method of a kind of Wimet according to claim 3, it is characterized in that, batching after stirring is dry by the drying tower that is filled with nitrogen after nozzle atomization, and spray-dired parameter is: oxygen level in the bore of nozzle: 1.0-1.3mm, atomizing pressure: 1000-1300Kpa, tower internal pressure≤4.1Kpa, the tower≤3.0%, nitrogen inlet temperature of stabilizer are that 200-210 ℃, nitrogen tower exit temperature are 90-100 ℃.
5. the preparation method of a kind of Wimet according to claim 1 and 2, it is characterized in that, described wet-milling step is by the ball mill ball milling, and the ball milling parameter is: drum's speed of rotation is that 33-36rpm, stacking factor are 0.5, solid-to-liquid ratio is that 3:1, milling time are that 30-40 hour, ratio of grinding media to material are 4:1.
6. the preparation method of a kind of Wimet according to claim 4 is characterized in that, adds 265ml concentration and be the alcohol of 92-94mol/L in every kilogram batching as ball-milling medium.
7. the preparation method of a kind of Wimet according to claim 1 and 2 is characterized in that, described pressing step adopts 20 tons of mouldenpresses, and the compacting parameter is: 8-12 beats/min.
8. the preparation method of a kind of Wimet according to claim 1 and 2 is characterized in that, the hydrogen flow is in the described sintering step: 5000-6000ml/h, and sintering temperature is: 1410 ℃-1440 ℃, pressurization: 5000Kpa.
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| CN2012105051867A CN103014393A (en) | 2012-12-03 | 2012-12-03 | Hard alloy preparation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278186A (en) * | 2014-10-16 | 2015-01-14 | 成都工具研究所有限公司 | Carbide blade for automobile cast iron processing |
| CN104313445A (en) * | 2014-09-30 | 2015-01-28 | 苏州博利迈新材料科技有限公司 | Tungsten titanium tantalum cobalt hard alloy coated with silicon dioxide and preparation method of tungsten titanium tantalum cobalt hard alloy |
| CN106623912A (en) * | 2016-12-14 | 2017-05-10 | 单麒铭 | Method for producing WC-Co hard alloy oilfield spray nozzles |
| CN109022996A (en) * | 2018-09-14 | 2018-12-18 | 河源富马硬质合金股份有限公司 | A kind of cemented carbide material towards non-ferrous metals processing |
| CN109097617A (en) * | 2018-09-25 | 2018-12-28 | 贵州科宇泰科技咨询有限公司 | A kind of hard alloy processing technology |
| CN109161772A (en) * | 2018-09-10 | 2019-01-08 | 晋城鸿刃科技有限公司 | The preparation method of ultra-fine cemented carbide |
| CN109439994A (en) * | 2018-12-12 | 2019-03-08 | 长沙黑金刚实业有限公司 | A kind of grinding-material and preparation method, application method and product obtained |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101403066A (en) * | 2008-10-31 | 2009-04-08 | 牡丹江工具有限责任公司 | Four-element P series hard alloy |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
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2012
- 2012-12-03 CN CN2012105051867A patent/CN103014393A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101403066A (en) * | 2008-10-31 | 2009-04-08 | 牡丹江工具有限责任公司 | Four-element P series hard alloy |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313445A (en) * | 2014-09-30 | 2015-01-28 | 苏州博利迈新材料科技有限公司 | Tungsten titanium tantalum cobalt hard alloy coated with silicon dioxide and preparation method of tungsten titanium tantalum cobalt hard alloy |
| CN104278186A (en) * | 2014-10-16 | 2015-01-14 | 成都工具研究所有限公司 | Carbide blade for automobile cast iron processing |
| CN106623912A (en) * | 2016-12-14 | 2017-05-10 | 单麒铭 | Method for producing WC-Co hard alloy oilfield spray nozzles |
| CN106623912B (en) * | 2016-12-14 | 2019-09-24 | 单麒铭 | A kind of preparation method of WC-Co hard alloy oil field nozzle |
| CN109161772A (en) * | 2018-09-10 | 2019-01-08 | 晋城鸿刃科技有限公司 | The preparation method of ultra-fine cemented carbide |
| CN109161772B (en) * | 2018-09-10 | 2019-11-19 | 晋城鸿刃科技有限公司 | The preparation method of ultra-fine cemented carbide |
| CN109022996A (en) * | 2018-09-14 | 2018-12-18 | 河源富马硬质合金股份有限公司 | A kind of cemented carbide material towards non-ferrous metals processing |
| CN109097617A (en) * | 2018-09-25 | 2018-12-28 | 贵州科宇泰科技咨询有限公司 | A kind of hard alloy processing technology |
| CN109439994A (en) * | 2018-12-12 | 2019-03-08 | 长沙黑金刚实业有限公司 | A kind of grinding-material and preparation method, application method and product obtained |
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Application publication date: 20130403 |