CN103014394A - Preparation method of hard alloy for manufacturing automobile tyre studs - Google Patents
Preparation method of hard alloy for manufacturing automobile tyre studs Download PDFInfo
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- CN103014394A CN103014394A CN2012105051871A CN201210505187A CN103014394A CN 103014394 A CN103014394 A CN 103014394A CN 2012105051871 A CN2012105051871 A CN 2012105051871A CN 201210505187 A CN201210505187 A CN 201210505187A CN 103014394 A CN103014394 A CN 103014394A
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Abstract
The invention relates to a preparation method of hard alloy for manufacturing automobile tyre studs. The preparation method comprises the steps of ingredient preparing, wet grinding, drying, pressing, sintering and passivating so as to prepare the hard alloy. The prepared hard alloy comprises the following ingredients in percentage by weight: 86.5%-88% of WC, 9.5%-10.5% of Co, 0.5%-1.5% of Ni and 1%-2% of TiC. The hardness (HRA) of the hard alloy prepared by the method disclosed by the invention is 88.5-89.5, the strength of the hard alloy is more than or equal to 2400N/mm<2>, the density of the hard alloy is 13.6-13.9 g/cm<3>, and the RS value of the hard alloy is 80mm-100mm. The stud manufactured by the hard alloy prepared by the method disclosed by the invention is high in strength, good in impact toughness, high in wear resistance and good in abrasion synchronicity with an automobile tyre, and can ensure the friction between the automobile tyre and the ground and prolong the service life of the automobile tyre.
Description
Technical field
The present invention relates to a kind of preparation method of the Wimet for the manufacture of automobile tyre antiskid nail.
Background technology
Some countries had more than half a year be in ice and snow season in 1 year in Northern Europe, brought very large difficulty for the people's trip.Common doughnut can't be in the walking of such road, develops a kind ofly can seem very important at the automobile antiskid tire that ice-snow road is walked.Wimet because have higher wear resistance, toughness is to follow closely only material for the manufacture of vehicle skidproof.Because the singularity that vehicle skidproof nail material requires: the one, the wearing and tearing of safety stud and automobile rubber are wanted synchronously, if safety stud rapid wear then be exactly its original effect, if it is too slow to wear and tear, the integral body of safety stud can come off and reduction of service life from tire; The 2nd, the safety stud material will have higher toughness, and fragmentation did not appear in the vehicle skidproof nail when doughnut made impact with the ground.Adopt at present the automobile tyre antiskid nail that Wimet is made on the market also not reach above-mentioned requirements.
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 that is applicable to make safety stud.
To achieve these goals, the present invention is mainly solved by the following technical programs: a kind of preparation method of the Wimet for the manufacture of automobile tyre antiskid nail, comprise that batching, wet-milling, drying, compacting, sintering and passivation make Wimet, in the described batching step, batching comprises following composition: 86.5-88wt%WC, 9.5-10.5wt%Co, 0.5-1.5wt%Ni and 1-2wt%TiC.
As preferably, the Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 2um, Co is that the Fei Shi mean particle size of 1.5 um, TiC is 1.5um.
As preferably, this preparation method also comprises whipping step: the batching before dry 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: 1100-1400Kpa, 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 3.5:1.
As preferably, in above-mentioned every kilogram batching, add 240-280ml concentration and be the alcohol of 92-94mol/L as ball-milling medium.
As preferably, above-mentioned pressing step adopts 3 tons of mouldenpresses, and the compacting parameter is: 17-20 beats/min.
As preferably, the hydrogen flow is in the above-mentioned sintering step: 5000-6000ml/h, sintering temperature is: 1430 ℃-1460 ℃.
As preferably, above-mentioned passivation step is: the product behind the sintering is packed into to add passivating solution in the machine for inactivating and carries out passivation, and the passivation parameter is: passivating solution dosage: 0.5g/kg, passivation time 8-12 hour.
The present invention has comprised Ni and TiC in raw material, TiC can reduce density, and Ni and TiC binding property are better, have improved intensity.Cemented Carbide Hardness (HRA) by the aforesaid method preparation reaches 88.5-89.5, intensity 〉=2400 N/mm
2, density is 13.6-13.9 g/cm
3, the RS value is 80-100mm.Intensity is high, toughness good, can bear the impact force that doughnut produces when different kinds of roads are walked so the safety stud that the relatively existing Wimet of safety stud of making by the Wimet of aforesaid method preparation is made has; Wear resistance is high,, the frictional force that guaranteed doughnut and ground good with the wearing and tearing synchronism of doughnut, the work-ing life of prolongation doughnut.
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 the Wimet for the manufacture of automobile tyre antiskid nail comprises:
(1) batching: comprise following composition: 86.5wt%WC, 10wt%Co, 1wt%Ni and 1.5wt%TiC;
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 2um, Co is that the Fei Shi mean particle size of 1.5 um, TiC is 1.5um.
(2) wet-milling: in the batching at every kilogram, add 240-280ml 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 3.5:1.
(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: 1100-1400Kpa, 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 3 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: 17-20 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, sintering temperature is: 1430 ℃-1460 ℃.
(7) passivation: the product behind the sintering packed into to add passivating solution in the machine for inactivating and carries out passivation, and clean totally makes Wimet after the product passivation; The passivation parameter is: passivating solution dosage: 0.5g/kg, passivation time 8-12 hour.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 88.9, intensity is 2650N/mm
2, density is 13.8g/cm
3, RS value: 95mm, the Wimet of such performance is made automobile tyre antiskid nail has that intensity is high, toughness good, can bear the impact force that doughnut produces when different kinds of roads are walked; Wear resistance is high,, the frictional force that guaranteed doughnut and ground good with the wearing and tearing synchronism of doughnut, the work-ing life of prolongation doughnut.
Embodiment 2: a kind of preparation method of the Wimet for the manufacture of automobile tyre antiskid nail comprises:
(1) batching: comprise following composition: 88wt%WC, 9.5wt%Co, 1.5wt%Ni and 1wt%TiC;
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 2um, Co is that the Fei Shi mean particle size of 1.5 um, TiC is 1.5um.
(2) wet-milling: in the batching at every kilogram, add 240-280ml 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 3.5:1.
(3) stir: the batching after the above-mentioned wet-milling is stirred until it is even.
(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: 1100-1400Kpa, 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 3 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: 17-20 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, sintering temperature is: 1430 ℃-1460 ℃.
(7) passivation: the product behind the sintering packed into to add passivating solution in the machine for inactivating and carries out passivation, and clean totally makes Wimet after the product passivation; The passivation parameter is: passivating solution dosage: 0.5g/kg, passivation time 8-12 hour.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 88.5, intensity is 2780N/mm
2, density is 13.9g/cm
3, RS value: 100mm, the Wimet of such performance is made automobile tyre antiskid nail has that intensity is high, toughness good, can bear the impact force that doughnut produces when different kinds of roads are walked; Wear resistance is high,, the frictional force that guaranteed doughnut and ground good with the wearing and tearing synchronism of doughnut, the work-ing life of prolongation doughnut.
Embodiment 3: a kind of preparation method of the Wimet for the manufacture of automobile tyre antiskid nail comprises:
(1) batching: comprise following composition: 87wt%WC, 10.5wt%Co, 0.5wt%Ni and 2wt%TiC;
The Fei Shi mean particle size of above-mentioned WC is that the Fei Shi mean particle size of 2um, Co is that the Fei Shi mean particle size of 1.5 um, TiC is 1.5um.
(2) wet-milling: in the batching at every kilogram, add 240-280ml 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 3.5:1.
(3) stir: the batching after the above-mentioned wet-milling is stirred until it is even.
(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: 1100-1400Kpa, 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 3 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: 17-20 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, sintering temperature is: 1430 ℃-1460 ℃.
(7) passivation: the product behind the sintering packed into to add passivating solution in the machine for inactivating and carries out passivation, and clean totally makes Wimet after the product passivation; The passivation parameter is: passivating solution dosage: 0.5/kg, passivation time 8-12 hour.
By the hard metal alloys that above-mentioned preparation method makes, hardness (HRA) is 89.3, intensity is 2420N/mm
2, density is 13.65g/cm
3, RS value: 82mm, the Wimet of such performance is made automobile tyre antiskid nail has that intensity is high, toughness good, can bear the impact force that doughnut produces when different kinds of roads are walked; Wear resistance is high,, the frictional force that guaranteed doughnut and ground good with the wearing and tearing synchronism of doughnut, the work-ing life of prolongation doughnut.
Claims (9)
1. preparation method for the manufacture of the Wimet of automobile tyre antiskid nail, comprise that batching, wet-milling, drying, compacting, sintering and passivation make Wimet, it is characterized in that, in the described batching step, batching comprises following composition: 86.5-88wt%WC, 9.5-10.5wt%Co, 0.5-1.5wt%Ni and 1-2wt%TiC.
2. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail according to claim 1, it is characterized in that, the Fei Shi mean particle size of described WC is that the Fei Shi mean particle size of 2um, Co is that the Fei Shi mean particle size of 1.5 um, TiC is 1.5um.
3. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail according to claim 1 and 2 is characterized in that, this preparation method also comprises whipping step: the batching before dry after the wet-milling is stirred until it is even.
4. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail 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: 1100-1400Kpa, 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 for the manufacture of automobile tyre antiskid nail 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 3.5:1.
6. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail according to claim 4 is characterized in that, adds 240-280ml 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 for the manufacture of automobile tyre antiskid nail according to claim 1 and 2 is characterized in that, described pressing step adopts 3 tons of mouldenpresses, and the compacting parameter is: 17-20 beats/min.
8. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail according to claim 1 and 2 is characterized in that, the hydrogen flow is in the described sintering step: 5000-6000ml/h, sintering temperature is: 1430 ℃-1460 ℃.
9. the preparation method of a kind of Wimet for the manufacture of automobile tyre antiskid nail according to claim 1 and 2, it is characterized in that, described passivation step is: the product behind the sintering is packed into to add passivating solution in the machine for inactivating and carries out passivation, and the passivation parameter is: passivating solution dosage: 0.5g/kg, passivation time 8-12 hour.
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| CN2012105051871A CN103014394A (en) | 2012-12-03 | 2012-12-03 | Preparation method of hard alloy for manufacturing automobile tyre studs |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460389A (en) * | 2016-06-03 | 2017-12-12 | 杨新跃 | It is a kind of to prepare anti-sliding nail core composition and its method for preparing anti-sliding nail core |
| CN111254337A (en) * | 2020-03-10 | 2020-06-09 | 株洲明日硬质合金有限公司 | Hard alloy anti-skid nail core for automobile tire and preparation method thereof |
| EP3988339A1 (en) | 2020-10-21 | 2022-04-27 | AB Sandvik Coromant | Tire studs |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102191421A (en) * | 2011-05-26 | 2011-09-21 | 株洲钻石切削刀具股份有限公司 | Ultrafine hard alloy with gradient structure and preparation process thereof |
-
2012
- 2012-12-03 CN CN2012105051871A patent/CN103014394A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102191421A (en) * | 2011-05-26 | 2011-09-21 | 株洲钻石切削刀具股份有限公司 | Ultrafine hard alloy with gradient structure and preparation process thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460389A (en) * | 2016-06-03 | 2017-12-12 | 杨新跃 | It is a kind of to prepare anti-sliding nail core composition and its method for preparing anti-sliding nail core |
| CN107460389B (en) * | 2016-06-03 | 2019-06-14 | 杨新跃 | A method of it preparing anti-sliding nail core composition and its is used to prepare anti-sliding nail core |
| CN111254337A (en) * | 2020-03-10 | 2020-06-09 | 株洲明日硬质合金有限公司 | Hard alloy anti-skid nail core for automobile tire and preparation method thereof |
| EP3988339A1 (en) | 2020-10-21 | 2022-04-27 | AB Sandvik Coromant | Tire studs |
| WO2022084391A1 (en) | 2020-10-21 | 2022-04-28 | Ab Sandvik Coromant | Tire studs |
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Application publication date: 20130403 |