CN101812621A - Submicron hard alloy and preparation method - Google Patents
Submicron hard alloy and preparation method Download PDFInfo
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- CN101812621A CN101812621A CN 201010152746 CN201010152746A CN101812621A CN 101812621 A CN101812621 A CN 101812621A CN 201010152746 CN201010152746 CN 201010152746 CN 201010152746 A CN201010152746 A CN 201010152746A CN 101812621 A CN101812621 A CN 101812621A
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Abstract
The invention discloses a submicron hard alloy and a preparation method thereof. The alloy comprises the following components in percentage by weight: 7 to 9 percent of C, 0.2 to 0.5 percent of Cr3C2, 0.1 to 0.4 percent of VC, and the balance of WC of 0.7-0.9 mu m. The preparation method comprises the steps of material blending, wet grinding, drying, forming and sintering, wherein the ratio of grinding media to material of the wet grinding is (4.5-6):1, the rotating speed of a wet grinder is 30 to 40 revolutions per minute, and the grinding time is 28 to 45 hours; a mixed material is dried, a molded blank is sintered at the temperature of between 1,400 and 1,450 DEG C, the sintered pressure is between 58 to 100 bar, and the heat insulation time is 30 to 60 minutes; and the WC grain size in the alloy is 0.7 to 0.9 mu m, the hardness is HV31730-1860, and the bending strength is not smaller than 4,000N/mm<2>. A cutting tool manufactured by using the alloy can also ensure enough strength and flexibility while increasing the abrasion resistance, can meet requirements on high efficiency and high durability of the cutting tool, is used in the fields of cutting cast irons, aluminum alloys and non-ferrous metals and drilling steel pieces, and can realize large-scale industrial production.
Description
Technical field
The present invention relates to a kind of Wimet and preparation method thereof, especially a kind of grain fineness number has excellent wear, toughness and high-flexural strength at 0.7～0.9 mu m range, is applicable to brill, hinge machining high-performance submicron hard alloy and preparation method thereof.
Background technology
Modern Machining Technology for Cutting requires cutting tool high-level efficiency, high durability, high reliability.Wimet has purposes widely with its high rigidity and high strength in the cutting tool field, and along with sub-micro is thin, the appearance of ultra-fine cemented carbide, " two high " characteristic that it is exclusive than the ordinary rigid alloy makes it obtain extensive industrial applications in the cutting field.Sub-micro is thin, ultra-fine cemented carbide is according to the difference of Co content and the difference of grain fineness number, has different material characteristics, can be fit to be applied to different machining object domains, under the situation of identical Co content, the alloy grain degree is thin more, alloy rigidity, bending strength are high more, but fracture toughness property (KiC), thermal conductivity variation.Therefore, when the design trade mark, should require comprehensively to weigh and accept or reject according to its difference at different machining field to cutter material.
At machining cast iron, aluminium alloy, non-ferrous metal, and the drilling field of steel part, modern Machining Technology for Cutting requires cutter material guaranteeing that wear resistance will be got well on enough flexible basis.The similar trades mark such as YG8, YG6X, YL10.2 obtain the heavy industrialization application at present, wherein YG8 belongs to and contains the particle WC trade mark in the cobalt 8%, YG6X belongs to and contains the trade mark that cobalt 6% fine particle WC adds a small amount of inhibitor TaC, and the YL10.2 genus contains the thin WC of cobalt 10% sub-micro and adds a small amount of Cr
3C
2The trade mark.Above trade mark hardness all is no more than HV
31650, its wear resistance can't satisfy modern Machining Technology for Cutting requirement.
The method for preparing ultra-fine crystal WC-Co hard alloy of mentioning in the Chinese patent application " a kind of method for preparing ultra-fine crystal WC-Co hard alloy (200710120263.6) ", because its ultra-high pressure sintering method that adopts, and sintering time is 60-120 second only, makes that the growth of WC grain crystalline form is imperfect, is unfavorable for that the WC grain subsurface defect eliminates; Adopt cubic apparatus ultra-high pressure sintering equipment, be difficult to make the hart metal product of complexity or specified shape, and single batch yield poorly, can not adapt to polytypic, high-level efficiency, large-scale modern industrialization production, and do not see the industrial applications report so far.
The ultrafine gain size material of mentioning in the Chinese patent application " ultrafine gain size material (200410045029.8) ", at machining cast iron, aluminium alloy, non-ferrous metal, especially the drilling field of steel part, because this Hardmetal materials grain fineness number (0.5 μ m) is meticulous, though hardness can meet the demands, but its fracture toughness property (Kic) deficiency easily causes cutter to collapse cutter and loses in the use.
Summary of the invention
The purpose of this invention is to provide a kind of submicron hard alloy and preparation method thereof, make that the WC mean grain size reaches (0.7～0.9) μ m in the submicron hard alloy, and hardness is HV
31730～1860, bending strength is not less than 4000N/mm
2The cutter of using this submicron hard alloy making also can guarantee enough intensity and toughness when wear resistance increases, at machining cast iron, aluminium alloy, non-ferrous metal, and the drilling field of steel part, satisfy of the requirement of modern Machining Technology for Cutting, and can realize large-scale industrial production cutter high-level efficiency, high durability.
Submicron hard alloy of the present invention, the composition of this alloy and weight percent are:
Co：(7～9)％，
Cr
3C
2：(0.2～0.5)％，
VC：(0.1～0.4)％，
WC: surplus, and Fisher particle size is 0.7～0.9 μ m.
The preparation method of described submicron hard alloy comprises batching, wet-milling, drying, moulding and sintering, and it is the Co powder of (7～9) %, the Cr of (0.2～0.5) % that batching adopts weight percent
3C
2The VC powder of powder, (0.1～0.4) %, surplus are the WC powder of Fisher particle size 0.7～0.9 μ m; The above-mentioned raw materials powder is carried out wet-milling in ball mill, ratio of grinding media to material is (4.5-6): 1, and drum's speed of rotation is 30-40 commentaries on classics/min, milling time 28～45 hours; The compound drying adopts 1400-1450 ℃ of low pressure sintering again after molding procedure is prepared into blank, and sintering pressure is 58-100bar, and soaking time is 30-60min.
Described wet grinding media is ethanol, acetone or hexane, and forming agent is polyoxyethylene glycol or paraffin.
The present invention is owing to select proper C r for use
3C
2, VC makes grain inhibitor, adopt processing parameters such as suitable wet grinding media and ratio of grinding media to material, drum's speed of rotation, milling time, and suitable low pressure sintering processing parameter, can make WC grain not grow up, mean grain size keeps (0.7～0.9) μ m, and WC grain growth is complete and defective is few, and alloy density can reach theoretical density, and its hardness reaches HV
3: 1730～1860, improved its wear resistance, Wimet bending strength 〉=4000N/mm
2(φ 3.25*38.5mm standard test specimen), and the Wimet of large-scale industrial production, its WC grain is not grown up yet, and the WC mean grain size is still kept this sub-micron degree index of (0.7～0.9) μ m, and its hardness HV
3〉=1730, bending strength 〉=4000N/mm
2The cutter that uses submicron hard alloy of the present invention to make, have high wear resistance and high toughness, at machining cast iron, aluminium alloy, non-ferrous metal, the drilling field that reaches steel part has very high stock-removing efficiency and work-ing life, can satisfy the requirement of modern Machining Technology for Cutting to cutter high-level efficiency, high durability.
Description of drawings
Fig. 1 is the stereoscan photograph (X5000) of submicron hard alloy of the present invention;
Fig. 2 is that submicron hard alloy of the present invention compares synoptic diagram with the twist drill of using the making of trade mark Wimet both at home and abroad always drilling length when drilling cast iron.
Embodiment
Embodiment 1: during batching, raw material powder consists of---the Co powder (Fisher particle size 1.0 μ m) of 8wt%, the Cr of 0.4wt%
3C
2The VC powder of powder, 0.25wt%, surplus are the WC powder of 0.8 μ m.Ethanol is as grinding medium, and polyoxyethylene glycol adopts 5: 1 ratio of grinding media to material as forming agent, drum's speed of rotation is 36 commentaries on classics/min, grinds 30h, and spraying drying makes compound, adopt 1410 ℃ of low pressure sinterings after the moulding, sintering pressure is 75bar, and soaking time is 56min, the submicron hard alloy that makes, its metallographic is (following examples together) as shown in Figure 1, grain fineness number is 0.8 μ m, and WC grain growth is complete and defective is few, and its HV
3Be 1780, φ 3.25*38.5mm standard test specimen (following examples together) bending strength is 4320N/mm
2
Embodiment 2: during batching, raw material powder consists of---the Co powder (Fisher particle size 1.5 μ m) of 7.2wt%, the Cr of 0.5wt%
3C
2The VC powder of powder, 0.4wt%, surplus are the WC powder of 0.7 μ m.Acetone is as grinding medium, and paraffin adopts 6: 1 ratio of grinding media to material as forming agent, drum's speed of rotation is 40 commentaries on classics/min, grind 45h, spraying drying makes compound, adopts 1400 ℃ of low pressure sinterings after the moulding, sintering pressure is 100bar, soaking time is 30min, the submicron hard alloy that makes, and grain fineness number is 0.7 μ m, WC grain growth is complete and defective is few, and its HV
3Be 1860, bending strength is 4130N/mm
2
Embodiment 3: during batching, raw material powder consists of---the Co powder (Fisher particle size 1.3 μ m) of 8.8wt%, the Cr of 0.25wt%
3C
2The VC powder of powder, 0.15wt%, surplus are the WC powder of 0.9 μ m.Hexane is as grinding medium, and paraffin adopts 4.5: 1 ratio of grinding media to material as forming agent, drum's speed of rotation is 30 commentaries on classics/min, grind 28h, spraying drying makes compound, adopts 1450 ℃ of low pressure sinterings after the moulding, sintering pressure is 58bar, soaking time is 50min, the submicron hard alloy that makes, and grain fineness number is 0.9 μ m, WC grain growth is complete and defective is few, and its HV
3Be 1740, bending strength is 4650N/mm
2
Embodiment 4: during batching, raw material powder consists of---the Co powder (Fisher particle size 1.3 μ m) of 8.1wt%, the Cr of 0.3wt%
3C
2The VC powder of powder, 0.25wt%, surplus are the WC powder of 0.8 μ m.Ethanol is as grinding medium, and polyoxyethylene glycol adopts 5: 1 ratio of grinding media to material as forming agent, drum's speed of rotation is 34 commentaries on classics/min, grind 32h, spraying drying makes compound, adopts 1430 ℃ of low pressure sinterings after the moulding, sintering pressure is 90bar, soaking time is 40min, the submicron hard alloy that makes, and grain fineness number is 0.8 μ m, WC grain growth is complete and defective is few, and its HV
3Be 1770, bending strength is 4710N/mm
2
Embodiment 5: during batching, raw material powder consists of---the Co powder (Fisher particle size 1.3 μ m) of 8.1wt%, the Cr of 0.3wt%
3C
2The VC powder of powder, 0.25wt%, surplus are the WC powder of 0.8 μ m.Ethanol is as grinding medium, and polyoxyethylene glycol adopts 5: 1 ratio of grinding media to material as forming agent, drum's speed of rotation is 38 commentaries on classics/min, grind 32h, spraying drying makes compound, adopts 1440 ℃ of low pressure sinterings after the moulding, sintering pressure is 80bar, soaking time is 60min, the submicron hard alloy that makes, and grain fineness number is 0.8 μ m, WC grain growth is complete and defective is few, and its HV
3Be 1740, bending strength is 4570N/mm
2
With submicron hard alloy of the present invention, and the twist drill made of trade mark Wimet commonly used both at home and abroad, under identical cutting speed, the amount of feed and hole depth, the drilling length during each comfortable drilling grey cast iron as shown in Figure 2.Know that by Fig. 2 the drilling length of submicron hard alloy of the present invention substantially exceeds other trades mark, satisfied of the requirement of modern Machining Technology for Cutting cutter high-level efficiency, high durability.
Claims (3)
1. submicron hard alloy, it is characterized in that: the composition of this alloy and weight percent are:
Co：(7～9)％，
Cr
3C
2：(0.2～0.5)％，
VC：(0.1～0.4)％，
WC: surplus, and Fisher particle size is 0.7～0.9 μ m.
2. the preparation method of submicron hard alloy according to claim 1 comprises batching, wet-milling, drying, moulding and sintering, it is characterized in that: batching adopts weight percent to be the Co powder of (7～9) %, the Cr of (0.2～0.5) %
3C
2The VC powder of powder, (0.1～0.4) %, surplus are the WC powder of Fisher particle size 0.7～0.9 μ m; The above-mentioned raw materials powder is carried out wet-milling in ball mill, ratio of grinding media to material is (4.5-6): 1, and drum's speed of rotation is 30-40 commentaries on classics/min, milling time 28～45 hours; The compound drying adopts 1400-1450 ℃ of low pressure sintering again after molding procedure is prepared into blank, and sintering pressure is 58-100bar, and soaking time is 30-60min.
3. the preparation method of submicron hard alloy according to claim 2, it is characterized in that: described wet grinding media is ethanol, acetone or hexane, described forming agent is polyoxyethylene glycol or paraffin.
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| CN 201010152746 CN101812621A (en) | 2010-04-22 | 2010-04-22 | Submicron hard alloy and preparation method |
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|---|---|---|---|
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Family
ID=42619988
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028725A (en) * | 2011-09-29 | 2013-04-10 | 河南省大地合金股份有限公司 | Method for preparing superfine hard alloy mixture |
| CN103572136A (en) * | 2013-11-06 | 2014-02-12 | 大连远东硬质合金有限公司 | Sub-micro grain hard alloy anvil and preparation method thereof |
| CN103691957A (en) * | 2013-12-29 | 2014-04-02 | 镇江东艺机械有限公司 | Production method for hard alloy cutter workblank |
| CN103710604A (en) * | 2013-12-27 | 2014-04-09 | 株洲硬质合金集团有限公司 | Hard alloy, and preparation method and application thereof |
| CN103898388A (en) * | 2014-04-21 | 2014-07-02 | 马鞍山市恒永利机械科技有限公司 | High-performance ultra-fine grained hard alloy new material splitting cutter |
| CN104831101A (en) * | 2015-05-25 | 2015-08-12 | 江西稀有稀土金属钨业集团有限公司 | Preparation method and system of hard alloy material |
| CN105195747A (en) * | 2015-09-28 | 2015-12-30 | 苏州新锐合金工具股份有限公司 | Method for improving uniformity and formability of hard alloy powder ball milling |
| CN105671403A (en) * | 2016-04-15 | 2016-06-15 | 成都比拓超硬材料有限公司 | Hard alloy holding-up hammer and application thereof in synthesizing superhard material on six-surface diamond presser |
| CN105734321A (en) * | 2016-03-01 | 2016-07-06 | 株洲硬质合金集团有限公司 | Preparing method for ultra-fine hard alloy |
| CN106312074A (en) * | 2016-08-25 | 2017-01-11 | 苏州赛特锐精密机械配件有限公司 | Preparation method for superfine hard alloy cutter blank with preformed cutter groove |
| CN106367651A (en) * | 2016-09-14 | 2017-02-01 | 鑫京瑞钨钢（厦门）有限公司 | Preparation method of tungsten carbide alloy mixture |
| CN108130468A (en) * | 2017-12-04 | 2018-06-08 | 株洲夏普高新材料有限公司 | Heat-and corrosion-resistant hard alloy and preparation method thereof |
| CN108149111A (en) * | 2017-12-04 | 2018-06-12 | 株洲夏普高新材料有限公司 | Hard alloy suitable for cutting of hardened steel and preparation method thereof |
| CN109022997A (en) * | 2018-09-14 | 2018-12-18 | 河源富马硬质合金股份有限公司 | A kind of high tough high-wearing feature polycrystalline cemented carbide material |
| CN109136603A (en) * | 2017-06-16 | 2019-01-04 | 荆门市格林美新材料有限公司 | A kind of preparation method of aluminium doping hard alloy |
| 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 |
| CN110202155A (en) * | 2019-06-20 | 2019-09-06 | 蓬莱市超硬复合材料有限公司 | A method of preparing high-strength and high ductility hard alloy cutter basis material |
| CN112853189A (en) * | 2020-12-31 | 2021-05-28 | 株洲硬质合金集团有限公司 | Submicron-crystalline hard alloy material and preparation method and application thereof |
| CN115821099A (en) * | 2022-11-28 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of hard alloy |
| CN115896519A (en) * | 2022-11-16 | 2023-04-04 | 河南大地合金有限公司 | Method for preparing hard alloy from WC ultrafine powder and hard alloy |
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Cited By (28)
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| CN103028725A (en) * | 2011-09-29 | 2013-04-10 | 河南省大地合金股份有限公司 | Method for preparing superfine hard alloy mixture |
| CN103028725B (en) * | 2011-09-29 | 2015-05-06 | 河南省大地合金股份有限公司 | Method for preparing superfine hard alloy mixture |
| CN103572136A (en) * | 2013-11-06 | 2014-02-12 | 大连远东硬质合金有限公司 | Sub-micro grain hard alloy anvil and preparation method thereof |
| CN103572136B (en) * | 2013-11-06 | 2015-12-30 | 大连远东钨业科技股份有限公司 | A kind of Sub-micro grain hard alloy anvil and preparation method thereof |
| CN103710604B (en) * | 2013-12-27 | 2015-11-18 | 株洲硬质合金集团有限公司 | A kind of Wimet, preparation method and application thereof |
| CN103710604A (en) * | 2013-12-27 | 2014-04-09 | 株洲硬质合金集团有限公司 | Hard alloy, and preparation method and application thereof |
| CN103691957A (en) * | 2013-12-29 | 2014-04-02 | 镇江东艺机械有限公司 | Production method for hard alloy cutter workblank |
| CN103898388A (en) * | 2014-04-21 | 2014-07-02 | 马鞍山市恒永利机械科技有限公司 | High-performance ultra-fine grained hard alloy new material splitting cutter |
| CN103898388B (en) * | 2014-04-21 | 2016-08-24 | 马鞍山市恒利达机械刀片有限公司 | A kind of high-performance superfine cemented carbide new material divides bar carving knife |
| CN104831101A (en) * | 2015-05-25 | 2015-08-12 | 江西稀有稀土金属钨业集团有限公司 | Preparation method and system of hard alloy material |
| CN105195747A (en) * | 2015-09-28 | 2015-12-30 | 苏州新锐合金工具股份有限公司 | Method for improving uniformity and formability of hard alloy powder ball milling |
| CN105734321A (en) * | 2016-03-01 | 2016-07-06 | 株洲硬质合金集团有限公司 | Preparing method for ultra-fine hard alloy |
| CN105671403A (en) * | 2016-04-15 | 2016-06-15 | 成都比拓超硬材料有限公司 | Hard alloy holding-up hammer and application thereof in synthesizing superhard material on six-surface diamond presser |
| CN105671403B (en) * | 2016-04-15 | 2018-01-09 | 成都比拓超硬材料有限公司 | A kind of hard alloy top hammer and its on cubic hinge press synthesizing superhard material application |
| CN106312074A (en) * | 2016-08-25 | 2017-01-11 | 苏州赛特锐精密机械配件有限公司 | Preparation method for superfine hard alloy cutter blank with preformed cutter groove |
| CN106312074B (en) * | 2016-08-25 | 2018-02-02 | 苏州赛特锐精密机械配件有限公司 | A kind of preparation method of the preforming cutter groove solid tool base substrate of ultra-fine cemented carbide |
| CN106367651A (en) * | 2016-09-14 | 2017-02-01 | 鑫京瑞钨钢（厦门）有限公司 | Preparation method of tungsten carbide alloy mixture |
| CN106367651B (en) * | 2016-09-14 | 2017-12-26 | 鑫京瑞钨钢（厦门）有限公司 | A kind of diamondite mixing preparation method for material |
| CN109136603A (en) * | 2017-06-16 | 2019-01-04 | 荆门市格林美新材料有限公司 | A kind of preparation method of aluminium doping hard alloy |
| CN108130468A (en) * | 2017-12-04 | 2018-06-08 | 株洲夏普高新材料有限公司 | Heat-and corrosion-resistant hard alloy and preparation method thereof |
| CN108149111A (en) * | 2017-12-04 | 2018-06-12 | 株洲夏普高新材料有限公司 | Hard alloy suitable for cutting of hardened steel and preparation method thereof |
| 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 |
| CN109022997A (en) * | 2018-09-14 | 2018-12-18 | 河源富马硬质合金股份有限公司 | A kind of high tough high-wearing feature polycrystalline cemented carbide material |
| CN110202155A (en) * | 2019-06-20 | 2019-09-06 | 蓬莱市超硬复合材料有限公司 | A method of preparing high-strength and high ductility hard alloy cutter basis material |
| CN112853189A (en) * | 2020-12-31 | 2021-05-28 | 株洲硬质合金集团有限公司 | Submicron-crystalline hard alloy material and preparation method and application thereof |
| CN115896519A (en) * | 2022-11-16 | 2023-04-04 | 河南大地合金有限公司 | Method for preparing hard alloy from WC ultrafine powder and hard alloy |
| CN115821099A (en) * | 2022-11-28 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of hard alloy |
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Application publication date: 20100825 |