CN103014393A - Hard alloy preparation method - Google Patents
Hard alloy preparation method Download PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- preparation
- milling
- wimet
- batching
- hard alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105051867A CN103014393A (en) | 2012-12-03 | 2012-12-03 | Hard alloy preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105051867A CN103014393A (en) | 2012-12-03 | 2012-12-03 | Hard alloy preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103014393A true CN103014393A (en) | 2013-04-03 |
Family
ID=47963503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105051867A Pending CN103014393A (en) | 2012-12-03 | 2012-12-03 | Hard alloy preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103014393A (en) |
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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-12-03 CN CN2012105051867A patent/CN103014393A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103014393A (en) | Hard alloy preparation method | |
| CN107552802B (en) | Titanium carbonitride-based solid solution powder for metal ceramics and preparation method thereof | |
| CN103537702B (en) | The preparation method of high-flexural strength nano WC-Co alloy powder and WC-Co alloy product | |
| CN107604231B (en) | A kind of high pressure resistant high-temperature rigid alloy and preparation method thereof | |
| US8980215B2 (en) | Method for preparing ultrafine tungsten carbide powder | |
| CN104480337A (en) | Preparation method of material for hard alloy slitting tool | |
| CN105801327A (en) | Composite solid propellant and preparation method thereof | |
| CN106191608A (en) | A kind of hard alloy in low cobalt of high temperature resistant, wear resistant corrosion resistant and preparation method thereof | |
| CN103386487B (en) | A kind of preparation method of carbide reinforced molybdenum alloy | |
| CN108546900B (en) | Preparation method of wear-resistant spiral shaft coatings | |
| CN102794452A (en) | Preparation method of aluminum silver paste | |
| CN110343889B (en) | Extra-thick hard alloy and preparation method thereof | |
| CN104451221A (en) | Preparation method of material for hard alloy cutting tool | |
| CN109550939A (en) | For the injection molding binder of digital cuttings and feeding preparation method | |
| CN115044795B (en) | Nanometer WC-Co hard alloy and preparation method thereof | |
| CN108570590A (en) | A kind of impregnated diamond matrix, impregnated diamond and preparation method thereof | |
| CN107475549A (en) | A kind of preparation method of hard alloy | |
| CN111172470A (en) | High-performance powder metallurgy pressed sintered type semi-high-speed steel and preparation method thereof | |
| CN107012379A (en) | One kind is without forming agent hard alloy production process | |
| CN102151834B (en) | Al2O3-cobalt-based adhesive phase-containing ultrafine hard alloy powder and preparation method and use thereof | |
| CN103014394A (en) | Preparation method of hard alloy for manufacturing automobile tyre studs | |
| CN102994791A (en) | Preparation method of hard alloy for producing numerical control blades | |
| CN109666844A (en) | A kind of hard alloy and preparation method thereof | |
| CN113088781B (en) | High-entropy hard alloy and preparation method and application thereof | |
| CN101338383A (en) | Method for preparing high-density cemented carbide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |