CN1775973A - Method for preparing super fine hard alloy - Google Patents
Method for preparing super fine hard alloy Download PDFInfo
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- CN1775973A CN1775973A CN 200510032406 CN200510032406A CN1775973A CN 1775973 A CN1775973 A CN 1775973A CN 200510032406 CN200510032406 CN 200510032406 CN 200510032406 A CN200510032406 A CN 200510032406A CN 1775973 A CN1775973 A CN 1775973A
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Abstract
The invention relates to a manufacture method for super rigidity super fine cemented carbide that includes the process of mixing, wet grinding, drying, molding, and sintering. It has high wear resistance and high corrosion stability, and it could be widely used in processing sealed component, valve gate and nozzle under the condition of corrosion and ablation, and prolongs the useful life of these products.
Description
Technical field
The present invention relates to a kind of ultrafine hard alloy preparation method, particularly a kind of ultrahigh hardness, corrosion resistant ultrafine hard alloy preparation method.
Background technology
Ultra-fine cemented carbide has purposes widely with its high rigidity and high strength, but life-time service under the special operation condition condition, as material as wortle, valve, finisher and sealing member, requirement has good wear resistance and erosion resistance, and the hardness of general conventional ultra-fine cemented carbide is all on the low side, and bending strength is 1300～1800N/mm
2The time HV
30＜2300N/mm
2, and, making the wear resistance of these products and solidity to corrosion not satisfy requirement owing to there is more bonding phase (being generally iron family element ting), work-ing life is generally not long.
Summary of the invention
The present invention is directed to the deficiency of the carbide alloy method of above-mentioned preparation, a kind of new preparation method is provided, further improve the hardness of ultra-fine cemented carbide, increase its wearability and corrosion resistance.
For achieving the above object, the preparation method of carbide alloy of the present invention comprises batching, wet-milling, drying, moulding and sintering circuit, ratio of grinding media to material during wet-milling is 5～6: 1, liquid-solid ratio is 450～460ml/kg, the abrasive material time is 85～90h, sintering temperature is 1650～1830 ℃, it is characterized in that: batching percentage for the Mo powder of≤3.0wt% or≤the Ni powder of 1.0wt% and/or≤the Co powder of 1.0wt%, the VC powder of 0.18～0.30wt%, the Cr of 0.3～0.6wt%
3C
2Powder, the Fisher particle size of described Ni and Co powder are 0.85～1.40 μ m, and surplus is that Fisher particle size is the superfine WC power of 0.2～0.4 μ m, and sintering adopts the low pressure sintering technology of 8～9Mpa, and the Carbon balance value is (+0.02～+ 0.10) % during burdening calculation.
As a further improvement on the present invention, Cr
3C
2With the total amount of VC be 0.45～0.9wt%, proportion scale is Cr
3C
2: VC=1.8～1.1.
Because to select Fisher particle size for use is the ultrafine WC powder of 0.2～0.4 μ m, do not add caking agent or add the caking agent of micro-fine size, i.e. caking agent Mo powder≤3.0wt% or Ni powder and/or Co powder≤1.0wt% are equipped with the certain total amount and the Cr of proportioning mutually again
3C
2With VC as grain inhibitor, control carbon balance value is (+0.02～+ 0.10) % during charge calculation, alloying constituent is adjusted in the suitable interval, low pressure sintering by 8～9Mpa, make in the resulting Wimet of the present invention the WC mean grain size about 0.3 μ m, at bending strength 1300～1800N/mm
2The time, HV
30〉=2550N/mm
2, owing to do not add the iron family element ting caking agent or only add micro-iron family element ting or Mo makes caking agent, the hardness of Wimet is greatly improved, and has obtained good wear resistance and corrosion resistance nature, prolong work-ing life greatly.
Embodiment
Embodiment 1: proportion scale is the ultra-fine Co powder (Fisher particle size is 0.92 μ m) of 0.5wt%, the VC powder of 0.30wt%, the Cr of 0.55wt%
3C
2Powder (Cr
3C
2+ VC=0.85%, Cr
3C
2: VC=1.8), surplus is that Fisher particle size is the thin WC powder of 0.32 μ m, and the Carbon balance value is+0.08% during burdening calculation; As ball-milling medium, liquid-solid ratio is 450ml/kg with alcohol, and ratio of grinding media to material is 5: 1, and Ball-milling Time is 90 hours, and the spray-dried compound that makes after the compression molding, places the air pressure stove interior with 1720 ℃ of sintering, and sintering pressure is 8Mpa.As the standard prod of the Wimet of check the inventive method preparation (following examples with), the WC mean grain size is 0.36 μ m in its alloy with the standard B sample of 5.25 * 6.5 * 20mm, and the performance index of alloy are as follows: bending strength 1710N/mm
2, hardness HV
302580N/mm
2
Embodiment 2: proportion scale is the ultra-fine Co powder (Fisher particle size is 1.12 μ m) of 0.2wt%, the VC powder of 0.25wt%, the Cr of 0.35wt%
3C
2Powder (Cr
3C
2+ VC=0.60%, Cr
3C
2: VC=1.4), surplus is that Fisher particle size is the thin WC powder of 0.28 μ m, and the Carbon balance value is+0.07% during burdening calculation; As ball-milling medium, liquid-solid ratio is 450ml/kg with alcohol, and ratio of grinding media to material is 5: 1, and Ball-milling Time is 85 hours, and the spray-dried compound that makes after the compression molding, places low pressure furnace interior with 1750 ℃ of sintering, and sintering pressure is 8Mpa.The WC mean grain size of product is 0.32 μ m, bending strength 1460N/mm
2, hardness HV
302610N/mm
2
Embodiment 3: proportion scale is the VC powder of 0.18wt%, the Cr of 0.30wt%
3C
2Powder (Cr
3C
2: VC=1.67), surplus is that Fisher particle size is the thin WC powder of 0.26 μ m, and the Carbon balance value is+0.05% during burdening calculation; As ball-milling medium, liquid-solid ratio is 450ml/kg with alcohol, and ratio of grinding media to material is 5: 1, and Ball-milling Time is 90 hours, and the spray-dried compound that makes after the compression molding, places the air pressure stove interior with 1830 ℃ of sintering, and sintering pressure is 9Mpa.The WC mean grain size of its product is 0.3 μ m, and the performance index of alloy are as follows: bending strength 1320N/mm
2, hardness HV
302690N/mm
2
Embodiment 4: proportion scale is the Superfine-Powder Ni (Fisher particle size is 1.26 μ m) of 1.0wt%, the VC powder of 0.18wt%, the Cr of 0.3wt%
3C
2Powder (Cr
3C
2+ VC=0.48%, Cr
3C
2: VC=1.1), surplus is that Fisher particle size is the thin WC powder of 0.3 μ m, and the Carbon balance value is+0.07% during burdening calculation; As ball-milling medium, liquid-solid ratio is 450ml/kg with alcohol, and ratio of grinding media to material is 5: 1, and Ball-milling Time is 85 hours, and the spray-dried compound that makes after the compression molding, places low pressure furnace interior with 1760 ℃ of sintering, and sintering pressure is 8Mpa.The WC mean grain size of product is 0.33 μ m, bending strength 1520N/mm
2, hardness HV
302560N/mm
2
Embodiment 5: proportion scale is the Superfine-Powder Ni (Fisher particle size is 1.35 μ m) of 0.4wt%, the ultra-fine Co powder of 0.2wt% (Fisher particle size is 0.88 μ m), the VC powder of 0.3wt%, the Cr of 0.45wt%
3C
2Powder (Cr
3C
2+ VC=0.75%, Cr
3C
2: VC=1.5), surplus is that Fisher particle size is the thin WC powder of 0.3 μ m, and the Carbon balance value is+0.08% during burdening calculation; As ball-milling medium, liquid-solid ratio is 450ml/kg with alcohol, and ratio of grinding media to material is 5: 1, and Ball-milling Time is 85 hours, and the spray-dried compound that makes after the compression molding, places low pressure furnace interior with 1760 ℃ of sintering, and sintering pressure is 8Mpa.The WC mean grain size of product is 0.33 μ m, bending strength 1520N/mm
2, hardness HV
302570N/mm
2
Embodiment 6: proportion scale is the Mo powder (Fisher particle size is 2.0 μ m) of 3wt%, the VC powder of 0.3wt%, the Cr of 0.55wt%
3C
2Powder (Cr
3C
2+ VC=0.85%, Cr
3C
2: VC=1.4), surplus is that Fisher particle size is the thin WC powder of 0.22 μ m, and the Carbon balance value is+0.02% during burdening calculation; As ball-milling medium, liquid-solid ratio is 460ml/kg with alcohol, and ratio of grinding media to material is 6: 1, and Ball-milling Time is 90 hours, and the spray-dried compound that makes after the compression molding, places low pressure furnace interior with 1650 ℃ of sintering, and sintering pressure is 8Mpa.The WC mean grain size of product is 0.32 μ m, bending strength 1780N/mm
2, hardness HV
302550N/mm
2
Claims (2)
1, a kind of preparation method of ultra-fine cemented carbide, comprise: batching, wet-milling, drying, moulding and sintering circuit, ratio of grinding media to material during wet-milling is 5～6: 1, liquid-solid ratio is 450～460ml/kg, the abrasive material time is 85～90h, sintering temperature is 1650～1830 ℃, it is characterized in that: batching percentage for the Mo powder of≤3.0wt% or≤the Ni powder of 1.0wt% and/or≤the Co powder of 1.0wt%, the VC powder of 0.18～0.30wt%, the Cr of 0.3～0.6wt%
3C
2Powder, the Fisher particle size of described Ni and Co powder are 0.85～1.40 μ m, and surplus is that Fisher particle size is the superfine WC power of 0.2～0.4 μ m, and sintering adopts the low pressure sintering technology of 8～9Mpa, and the Carbon balance value is (+0.02～+ 0.10) % during burdening calculation.
2, the preparation method of ultra-fine cemented carbide as claimed in claim 1 is characterized in that: Cr
3C
2With the total amount of VC be 0.45～0.9wt%, proportion scale is Cr
3C
2: VC=1.8～1.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100324069A CN100387737C (en) | 2005-11-21 | 2005-11-21 | Method for preparing super fine hard alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100324069A CN100387737C (en) | 2005-11-21 | 2005-11-21 | Method for preparing super fine hard alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775973A true CN1775973A (en) | 2006-05-24 |
| CN100387737C CN100387737C (en) | 2008-05-14 |
Family
ID=36765691
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|---|---|---|---|
| CNB2005100324069A Expired - Fee Related CN100387737C (en) | 2005-11-21 | 2005-11-21 | Method for preparing super fine hard alloy |
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| CN (1) | CN100387737C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081377A1 (en) * | 2009-01-16 | 2010-07-22 | 江西稀有稀土金属钨业集团有限公司 | Ball milling method for preparation of hard alloy mixture |
| CN103484703A (en) * | 2013-10-15 | 2014-01-01 | 株洲硬质合金集团有限公司 | Preparation method of tungsten carbide-titanium carbide solid solution |
| CN103695684A (en) * | 2013-12-23 | 2014-04-02 | 四川大学 | Preparation method of ultrafine cemented carbide blade material for drill bit for processing tube plate |
| CN104451217A (en) * | 2013-09-17 | 2015-03-25 | 自贡硬质合金有限责任公司 | Preparation method of ultrafine cemented carbide |
| CN105695837A (en) * | 2014-11-26 | 2016-06-22 | 自贡硬质合金有限责任公司 | Preparation method of WC-Ni fine grain cemented carbide |
| CN107460390A (en) * | 2017-06-26 | 2017-12-12 | 崇义恒毅陶瓷复合材料有限公司 | Water knife nozzle and preparation method thereof |
| CN108059460A (en) * | 2017-12-04 | 2018-05-22 | 株洲夏普高新材料有限公司 | Hard alloy suitable for water knife sandpipe and preparation method thereof |
| 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 |
| 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 |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3206972B2 (en) * | 1992-07-16 | 2001-09-10 | 日立ツール株式会社 | Fine-grain cemented carbide |
| JP2002096591A (en) * | 2000-07-19 | 2002-04-02 | Tsubaki Nakashima Co Ltd | Ball for ballpoint pen |
| JP2005052938A (en) * | 2003-08-05 | 2005-03-03 | Hitachi Tool Engineering Ltd | Small drill made of tungsten-carbide-based cemented carbide |
| CN1216171C (en) * | 2003-11-17 | 2005-08-24 | 株洲硬质合金集团有限公司 | Process for preparing ultra-fine cemented carbide |
-
2005
- 2005-11-21 CN CNB2005100324069A patent/CN100387737C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081377A1 (en) * | 2009-01-16 | 2010-07-22 | 江西稀有稀土金属钨业集团有限公司 | Ball milling method for preparation of hard alloy mixture |
| JP2012515261A (en) * | 2009-01-16 | 2012-07-05 | チャンシー レア アース アンド レア メタルズ タングステン グループ コーポレーション | Ball milling process for preparation of hard alloy mixtures |
| AU2009337569B2 (en) * | 2009-01-16 | 2013-04-11 | Jiangxi Rare Earth And Rare Metals Tungsten Group Corporation | Ball milling method for preparation of hard alloy mixture |
| US8584975B2 (en) | 2009-01-16 | 2013-11-19 | Jiangxi Rare Earth And Rare Metals Tungsten Group Corporation | Ball milling process for preparing hard alloy mixture |
| CN104451217A (en) * | 2013-09-17 | 2015-03-25 | 自贡硬质合金有限责任公司 | Preparation method of ultrafine cemented carbide |
| CN104451217B (en) * | 2013-09-17 | 2017-05-03 | 自贡硬质合金有限责任公司 | Preparation method of ultrafine cemented carbide |
| CN103484703A (en) * | 2013-10-15 | 2014-01-01 | 株洲硬质合金集团有限公司 | Preparation method of tungsten carbide-titanium carbide solid solution |
| CN103695684A (en) * | 2013-12-23 | 2014-04-02 | 四川大学 | Preparation method of ultrafine cemented carbide blade material for drill bit for processing tube plate |
| CN103695684B (en) * | 2013-12-23 | 2015-10-14 | 四川大学 | A kind of preparation method of tube sheet drill bit for machining ultra-fine cemented carbide blade material |
| CN105695837A (en) * | 2014-11-26 | 2016-06-22 | 自贡硬质合金有限责任公司 | Preparation method of WC-Ni fine grain cemented carbide |
| CN107460390A (en) * | 2017-06-26 | 2017-12-12 | 崇义恒毅陶瓷复合材料有限公司 | Water knife nozzle and preparation method thereof |
| CN108059460A (en) * | 2017-12-04 | 2018-05-22 | 株洲夏普高新材料有限公司 | Hard alloy suitable for water knife sandpipe and preparation method thereof |
| 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 |
| 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 |
| 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 |
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| CN100387737C (en) | 2008-05-14 |
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