CN101265544A - Vanadium-containing non-magnesium hard alloy and preparation method thereof - Google Patents
Vanadium-containing non-magnesium hard alloy and preparation method thereof Download PDFInfo
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- CN101265544A CN101265544A CNA2008100312309A CN200810031230A CN101265544A CN 101265544 A CN101265544 A CN 101265544A CN A2008100312309 A CNA2008100312309 A CN A2008100312309A CN 200810031230 A CN200810031230 A CN 200810031230A CN 101265544 A CN101265544 A CN 101265544A
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Abstract
The invention relates to a nonmagnetic hard alloy material and a preparation method thereof. The alloy comprises (wt %) tungsten carbide 75-90, nickel powder 8-20, chromium carbide 0.5-3.0, and vanadium carbide 0.3-2.5. The preparation method comprises compounding, wet grinding, drying, pressing, sintering and checking, wherein in the wet grinding step, a nonmagnetic alloy lining board wet grinder is used, alcohol or acetone is added as grinding medium, nonmagnetic hard alloy balls is used as grinding material, the ratio of grinding medium to material is 5:1, the solid-to-liquid ratio is 350ml/Kg, and the wet grinding time is 48-56 hours; and pressure sintering is adopted. In the inventive nonmagnetic hard alloy material, fine-particle tungsten carbide powder (1.0-1.5 mum) is used as hard phase, so as to improve the hardness and abrasion resistance of the alloy. The nickel is used as binder, and a small amount of chromium carbide and vanadium carbide are added as tungsten carbide grain growth inhibitor, so as to refine tungsten carbide crystal grains, and further improve the hardness and abrasion resistance of the alloy. The pressure sintering technique accelerates densification speed during sintering process, effectively reduces porosity of the alloy, and remarkably improves the strength of the alloy.
Description
Technical field
The present invention relates to a kind of Hardmetal materials and preparation method thereof, particularly a kind of non-magnesium hard alloy and preparation method thereof.
Background technology
Wimet is described as the tooth of industry because have characteristics such as high strength, high rigidity, is a kind of widely used instrument village material and high-abrasive material.Itself is nonmagnetic in sintered-carbide die material requirements in the magnetic materials production industry, as adopts common tungsten-cobalt carbide Wimet then to have certain magnetic, with it as moulding stock, the sizing phenomenon is serious in process of production, be difficult for the demoulding, the compacting qualification rate is low, the production cost height.And because the easy oxidation of common tungsten-cobalt carbide Hardmetal materials, not corrosion-resistant, its use range is very limited.And non-magnesium hard alloy material of the prior art generally adopts wolfram varbide, cobalt, chromium, molybdenum as essentially consist, reduced the magnetic of sintered-carbide die material to a certain extent, but its intensity and hardness are all lower, as Chinese patent CN 03118356.5 disclosed (non-magnesium hard alloy and preparation method thereof), its hardness of the non-magnetic alloy of its production only is 80～86HRA, and bending strength is 2200N/mm
2Therefore, hardness and the intensity as the non-magnesium hard alloy material of moulding stock purposes all needs further raising.
Summary of the invention
The objective of the invention is provides a kind of non-magnesium hard alloy in order to solve the problem that above-mentioned prior art exists, and it has the advantage of resistance to oxidation, wear-resistant, good toughness.
Another object of the present invention provides a kind of preparation method of non-magnesium hard alloy, and it makes the non-magnesium hard alloy of being produced reach above-mentioned requirements.
Technical scheme of the present invention is:
A kind of non-magnesium hard alloy, it is to be main ingredient with the wolfram varbide, it is characterized in that: the composition of this alloy and weight percent are:
Wolfram varbide: 75%～90%
Nickel powder: 8%～20%
Chromium carbide: 0.5%～3.0%
Vanadium carbide: 0.3%～2.5%.
As to further improvement of the present invention, described alloy ingredient and weight percent are:
Wolfram varbide: 80%～90%
Nickel powder: 8%～17%
Chromium carbide: 0.5%～2.0%
Vanadium carbide: 0.3%～2.0%.
As to further improvement of the present invention, described alloy ingredient and weight percent are:
Wolfram varbide: 89%
Nickel powder: 10%
Chromium carbide: 0.5%
Vanadium carbide: 0.5%.
The making method of non-magnesium hard alloy of the present invention, comprise operations such as batching, wet-milling, drying, compacting, sintering, check, it is characterized in that: the described non-magnetic alloy liner plate wet wheeling machine that in the wet-milling operation, adopts, add alcohol or acetone as grinding medium, adopt the non-magnesium hard alloy ball as abrasive substance, ratio of grinding media to material is 5: 1, and solid-to-liquid ratio is 350ml/Kg, and the wet-milling time is 48～56 hours.
As to further improvement of the present invention, the described dry vacuum-drying mode that adopts, drying temperature is 85～90 ℃, be 6～8 hours time of drying, and dried material sieves with 80～100 purpose screen clothes, mixes forming agent, and the system material, compression moulding is the product of desired shape and size then.
As to further improvement of the present invention, described sintering is to carry out sintering in pressure sintering furnace, and furnace pressure is controlled at 3～5MPa, and sintering temperature is 1430～1460 ℃, and soaking time is 30～60 minutes.
As to further improvement of the present invention, the gas that is charged in the described pressure sintering furnace is high-purity argon gas.
Beneficial effect of the present invention is:
1, the present invention adopt 1.0～1.5um the fine particle tungsten carbide powder as the hard phase, improved hardness of alloy and wear resistance.
2, nickel is made binding agent and is added small amount of carbonized chromium, vanadium carbide as the tungsten carbide crystal grain growth inhibitor, and the refinement tungsten carbide crystal grain further improves hardness of alloy, so the wear resistance of alloy is greatly improved,
3, adopt the pressure sintering technology, by feeding the high-purity argon gas of certain pressure when the liquid phase sintering, the densification degree that quickens sintering process effectively reduces the porosity of alloy, thereby improves the intensity of alloy greatly.
End properties behind sintering reaches following index:
Rockwell hardness: 〉=86HRA
Bending strength: 〉=3000N/mm
2
Density: 13.60～14.60g/cm
3
Embodiment
Embodiment 1: a kind of non-magnesium hard alloy, and it is to be main ingredient with the wolfram varbide, the composition of this alloy and weight percent are: tungsten carbide powder 90%, nickel powder 8%, carbonization chromium powder 1.5%, carbonization vanadium powder 0.5%.
The making method of above-mentioned non-magnesium hard alloy, comprise batching, wet-milling, dry, compacting, sintering, operations such as check, take by weighing each raw material in proportion, the compound weight of preparing is 150Kg, with prepared mixture in 180 liter non-magnesium hard alloy liner plate wet wheeling machines, adopt the non-magnesium hard alloy ball as abrasive substance, carry out wet-milling with alcohol as medium, ratio of grinding media to material is 5: 1, and liquid-solid ratio is 350ml/kg, and drum's speed of rotation is 36r/min, milling time is 48 hours, ground slip is carried out vacuum-drying, and drying temperature is 90 ℃, and be 8 hours time of drying, dried material sieves with 100 purpose screen clothes, mix forming agent, and the system material, compression moulding is the goods of desired shape and size then.Goods after the compression moulding are carried out pressure sintering, and sintering temperature is 1430～1460 ℃, and pressure is 3MPa, and the gas that is charged in the pressure sintering furnace is high-purity argon gas, and soaking time is 30 minutes.The performance of products obtained therefrom is: hardness 88.5HRA, bending strength 3050MPa, density 14.65g/cm
3
Embodiment 2: a kind of non-magnesium hard alloy, and it is to be main ingredient with the wolfram varbide, the composition of this alloy and weight percent are: tungsten carbide powder 85%, nickel powder 13.2%, carbonization chromium powder 1.0%, carbonization vanadium powder 0.8%.
The making method of above-mentioned non-magnesium hard alloy, comprise batching, wet-milling, dry, compacting, sintering, operations such as check, take by weighing each raw material in proportion, the compound weight of preparing is 150Kg, prepared mixture in 180 liter non-magnesium hard alloy liner plate wet wheeling machines, is carried out wet-milling with alcohol or acetone as medium, and ratio of grinding media to material is 5: 1, liquid-solid ratio is 350ml/kg, drum's speed of rotation is 36r/min, and milling time is 48 hours, and ground slip is carried out vacuum-drying, drying temperature is 90 ℃, be 8 hours time of drying, and dried material sieves with 100 purpose screen clothes, mixes forming agent, and the system material, compression moulding is the goods of desired shape and size then.Goods after the compression moulding are carried out pressure sintering, and sintering temperature is 1430～1460 ℃, and pressure is 3MPa, and the gas that is charged in the pressure sintering furnace is high-purity argon gas, and soaking time is 30 minutes.The performance of products obtained therefrom is: hardness 87.5HRA, bending strength 3200MPa, density 14.20g/cm
3
Embodiment 3:
A kind of non-magnesium hard alloy, it is to be main ingredient with the wolfram varbide, the composition of this alloy and weight percent are: tungsten carbide powder 80%, nickel powder 16.5%, carbonization chromium powder 2.0%, carbonization vanadium powder 1.5%.
The making method of above-mentioned non-magnesium hard alloy, comprise batching, wet-milling, dry, compacting, sintering, operations such as check, take by weighing each raw material in proportion, the compound weight of preparing is 150Kg, prepared mixture in 180 liter non-magnesium hard alloy liner plate wet wheeling machines, is carried out wet-milling with alcohol or acetone as medium, and ratio of grinding media to material is 5: 1, liquid-solid ratio is 350ml/kg, drum's speed of rotation is 36r/min, and milling time is 48 hours, and ground slip is carried out vacuum-drying, drying temperature is 90 ℃, be 8 hours time of drying, and dried material sieves with 100 purpose screen clothes, mixes forming agent, and the system material, compression moulding is the goods of desired shape and size then.Goods after the compression moulding are carried out pressure sintering, and sintering temperature is 1430～1460 ℃, and pressure is 3MPa, and the gas that is charged in the pressure sintering furnace is high-purity argon gas, and soaking time is 30 minutes.The performance of products obtained therefrom is: hardness 85.5HRA, bending strength 3250MPa, density 13.75g/cm
3
Embodiment 4:
A kind of non-magnesium hard alloy, it is to be main ingredient with the wolfram varbide, the composition of this alloy and weight percent are: tungsten carbide powder 89%, nickel powder 10%, carbonization chromium powder 0.5%, carbonization vanadium powder 0.5%.
The making method of above-mentioned non-magnesium hard alloy, comprise batching, wet-milling, dry, compacting, sintering, operations such as check, take by weighing each raw material in proportion, the compound weight of preparing is 150Kg, prepared mixture in 180 liter non-magnesium hard alloy liner plate wet wheeling machines, is carried out wet-milling with alcohol or acetone as medium, and ratio of grinding media to material is 5: 1, liquid-solid ratio is 350ml/kg, drum's speed of rotation is 36r/min, and milling time is 48 hours, and ground slip is carried out vacuum-drying, drying temperature is 90 ℃, be 8 hours time of drying, and dried material sieves with 100 purpose screen clothes, mixes forming agent, and the system material, compression moulding is the goods of desired shape and size then.Goods after the compression moulding are carried out pressure sintering, and sintering temperature is 1430～1460 ℃, and pressure is 3MPa, and the gas that is charged in the pressure sintering furnace is high-purity argon gas, and soaking time is 30 minutes.The performance of products obtained therefrom is: hardness 88.0HRA, bending strength 3100MPa, density 14.55g/cm
3
The present invention as long as adopted the method for adding nickel, chromium carbide, vanadium carbide production non-magnesium hard alloy, promptly belongs to protection scope of the present invention including but not limited to above-mentioned embodiment.
Claims (7)
1, a kind of non-magnesium hard alloy, it is main ingredient with the wolfram varbide, it is characterized in that: the composition of this alloy and weight percent are:
Wolfram varbide: 75%～90%
Nickel powder: 8%～20%
Chromium carbide: 0.5%～3.0%
Vanadium carbide: 0.3%～2.5%.
2, non-magnesium hard alloy according to claim 1 is characterized in that: described alloy ingredient and weight percent are:
Wolfram varbide: 80%～90%
Nickel powder: 8%～17%
Chromium carbide: 0.5%～2.0%
Vanadium carbide: 0.3%～2.0%.
3, non-magnesium hard alloy according to claim 1 is characterized in that: described alloy ingredient and weight percent are:
Wolfram varbide: 89%
Nickel powder: 10%
Chromium carbide: 0.5%
Vanadium carbide: 0.5%.
4, a kind of making method of non-magnesium hard alloy, comprise operations such as batching, wet-milling, drying, compacting, sintering, check, it is characterized in that: described wet-milling operation adopts non-magnetic alloy liner plate wet wheeling machine, add alcohol or acetone as grinding medium, adopt the non-magnesium hard alloy ball as abrasive substance, ratio of grinding media to material is 5: 1, and solid-to-liquid ratio is 350ml/Kg, and the wet-milling time is 48～56 hours.
5, the production method of non-magnesium hard alloy according to claim 4 is characterized in that: the described dry vacuum-drying mode that adopts, and drying temperature is 85～90 ℃, be 6～8 hours time of drying.
6, the production method of non-magnesium hard alloy according to claim 5 is characterized in that: described sintering is to carry out sintering in pressure sintering furnace, and furnace pressure is controlled at 3～5MPa, and sintering temperature is 1430～1460 ℃, and soaking time is 30～60 minutes.
7, the production method of non-magnesium hard alloy according to claim 6 is characterized in that: the gas that is charged in the described pressure sintering furnace is high-purity argon gas.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102433485A (en) * | 2011-08-03 | 2012-05-02 | 四川欧曼机械有限公司 | Iron and nickel-based hard alloy cutter material and preparation method thereof |
| CN102899547A (en) * | 2012-10-22 | 2013-01-30 | 桂林华锋金刚石科技有限公司 | Manufacturing method of diamond wire saw bead cutting abrasive added with cubic boron nitride |
| CN103388097A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide tool |
| CN103388098A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide hobbing cutter |
| CN103388088A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Cemented carbide reamer |
| CN103394690A (en) * | 2013-08-13 | 2013-11-20 | 四川川钨硬质合金有限公司 | Cemented carbide powder used in production of nozzles, and preparation method thereof |
| CN105568107A (en) * | 2016-01-29 | 2016-05-11 | 柳州市安龙机械设备有限公司 | Manufacturing method for high wire roll ring |
| CN107312962A (en) * | 2017-06-29 | 2017-11-03 | 东莞杰宇机械有限公司 | A kind of bimetallic alloy machine barrel material and its production technology |
| CN108193119A (en) * | 2017-12-21 | 2018-06-22 | 广东金木水火土实业有限公司 | A kind of high-precision optical fiber cutting blade and its processing method |
| CN108300922A (en) * | 2018-02-28 | 2018-07-20 | 湖南天益高技术材料制造有限公司 | A kind of 3D glass heats bender soaking plate and its production method |
| CN109234595A (en) * | 2018-10-30 | 2019-01-18 | 湖南工业大学 | A kind of nonmagnetic hard alloy and preparation method thereof |
| CN109536813A (en) * | 2018-12-21 | 2019-03-29 | 株洲硬质合金集团有限公司 | A kind of non-magnesium hard alloy and its preparation method and application |
| CN111266597A (en) * | 2020-03-23 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of metal vanadium powder |
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2008
- 2008-05-07 CN CNA2008100312309A patent/CN101265544A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102433485A (en) * | 2011-08-03 | 2012-05-02 | 四川欧曼机械有限公司 | Iron and nickel-based hard alloy cutter material and preparation method thereof |
| CN102899547A (en) * | 2012-10-22 | 2013-01-30 | 桂林华锋金刚石科技有限公司 | Manufacturing method of diamond wire saw bead cutting abrasive added with cubic boron nitride |
| CN103388097A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide tool |
| CN103388098A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide hobbing cutter |
| CN103388088A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Cemented carbide reamer |
| CN103388098B (en) * | 2013-06-29 | 2016-06-15 | 蚌埠市鸿安精密机械有限公司 | A kind of carbide hob |
| CN103394690B (en) * | 2013-08-13 | 2015-08-19 | 四川川钨硬质合金有限公司 | A kind of cemented carbide powder producing nozzle and preparation method thereof |
| CN103394690A (en) * | 2013-08-13 | 2013-11-20 | 四川川钨硬质合金有限公司 | Cemented carbide powder used in production of nozzles, and preparation method thereof |
| CN105568107A (en) * | 2016-01-29 | 2016-05-11 | 柳州市安龙机械设备有限公司 | Manufacturing method for high wire roll ring |
| CN107312962A (en) * | 2017-06-29 | 2017-11-03 | 东莞杰宇机械有限公司 | A kind of bimetallic alloy machine barrel material and its production technology |
| CN108193119A (en) * | 2017-12-21 | 2018-06-22 | 广东金木水火土实业有限公司 | A kind of high-precision optical fiber cutting blade and its processing method |
| CN108300922A (en) * | 2018-02-28 | 2018-07-20 | 湖南天益高技术材料制造有限公司 | A kind of 3D glass heats bender soaking plate and its production method |
| CN109234595A (en) * | 2018-10-30 | 2019-01-18 | 湖南工业大学 | A kind of nonmagnetic hard alloy and preparation method thereof |
| CN109536813A (en) * | 2018-12-21 | 2019-03-29 | 株洲硬质合金集团有限公司 | A kind of non-magnesium hard alloy and its preparation method and application |
| CN111266597A (en) * | 2020-03-23 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of metal vanadium powder |
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