KR100769348B1 - 초미립 텅스텐카바이드-코발트 복합분말 제조방법 - Google Patents
초미립 텅스텐카바이드-코발트 복합분말 제조방법 Download PDFInfo
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- KR100769348B1 KR100769348B1 KR1020060024813A KR20060024813A KR100769348B1 KR 100769348 B1 KR100769348 B1 KR 100769348B1 KR 1020060024813 A KR1020060024813 A KR 1020060024813A KR 20060024813 A KR20060024813 A KR 20060024813A KR 100769348 B1 KR100769348 B1 KR 100769348B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/056—Submicron particles having a size above 100 nm up to 300 nm
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
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Abstract
Description
WC -12wt%Co | 총탄소량 (wt%) | 포화자장 (%) | 항자력 (Oe) | 경도 (HRa) | 경도 (Hv30kg) | 항절력 (N/mm2) |
APT+Co Oxalate (0.1∼0.2㎛급) | 5.47 | 79.2 | 439 | 93.3 | 1798 | 4212 |
0.2㎛ 소재 비교 (해외 C사) | 5.39 | 76.1 | 398 | 92.6 | 1720 | 4280 |
WC -9wt%Co | 총탄소량 (wt%) | 포화자장 (%) | 항자력 (Oe) | 경도 (HRa) | 경도 (Hv30kg) | 항절력 (N/mm2) |
APT+Co Oxalate (0.2∼0.3㎛급) | 5.65 | 80.2 | 502 | 93.8 | 1944 | 4032 |
0.3㎛ 소재 비교 (해외 A사) | 5.61 | 76.8 | 485 | 93.7 | 1922 | 3665 |
WC -10wt%Co | 총탄소량 (wt%) | 포화자장 (%) | 항자력 (Oe) | 경도 (HRa) | 경도 (Hv30kg) | 항절력 (N/mm2) |
(H2WO4) + Co Acetate (0.3~0.4㎛급) | 5.54 | 78.2 | 451 | 93.4 | 1844 | 4012 |
0.6㎛ 소재 비교 (해외 K사) | 5.55 | 77.2 | 223 | 91.6 | 1540 | 4101 |
WC -8wt%Co (APT+Co oxalate) | 총탄소량 (wt%) | 포화자장 (%) | 항자력 (Oe) | 경도 (HRa) | 경도 (Hv30kg) | 항절력 (N/mm2) |
기계적 혼합공정시 투입 / 화합물 형태 도5(a), 도5(b) | 5.68 | 82.5 | 564 | 94.1 | 1962 | 3841 |
탄소소스 혼합공정시 투입 / 탄화물 형태 도6(a), 도6(b) | 5.69 | 83.8 | 532 | 93.9 | 1941 | 3772 |
탄소소스 혼합공정시 투입 / 산화물 형태 도7(a), 도7(b) | 5.68 | 82.8 | 541 | 93.9 | 1943 | 3878 |
Claims (10)
- 텅스텐 화합물과 코발트 화합물을 기계적 방법으로 혼합하는 제1혼합공정과,상기 제1혼합공정에서 혼합된 분말의 암모니아와 수분을 제거하고 산화물로 형성하기 위한 하소공정과,상기 하소된 분말을 순수 금속분말로 제조하기 위한 환원공정과,상기 환원된 분말에 탄소소스를 첨가하는 공정인 제2혼합공정과,상기 제2혼합공정에서 혼합된 분말을 침탄하여 초경합금 분말을 제조하는 침탄공정으로 이루어지며,입자성장억제제를 제1혼합공정 또는 제2혼합공정 중 어느 하나 이상의 공정에서 금속의 화합물 형태로 첨가하는 것을 특징을 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 삭제
- 제 1 항에 있어서, 상기 텅스텐 화합물은 암모늄 파라텅스텐산((NH4)10W12O42ㆍ5H2O), 텅스텐산(H2WO4), 암모늄 메타텅스텐산((NH4)6(H2W12O40)ㆍ4H2O) 인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 코발트 화합물은 코발트 옥살레이트(CoC2O4ㆍ2H2O), 초산 코발트(Co·(CH3COO)2·4H2O), 코발트 설페이트(CoO4Sㆍ7H2O) 인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 제1혼합공정에서의 입자성장억제제는 오산화 바나듐(V2O5), 삼산화 바나듐(V2O3), 바나듐산 암모늄(NH4VO3), 크롬염(Cr(NO3)2), 삼산화 크롬(Cr2O3), 초산 크롬(Cr(CH3COO)3), 오산화 탄탈륨(Ta2O5), 니오비움 클로라이드(NbCl5), 오산화 니오비움(Nb2O5), 이산화 티타늄(TiO2), 티타늄 클로라이드(TiCl2), 탄탈륨 클로라이드(TaCl5) 중의 어느 하나 이상인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 제2혼합공정에서의 입자성장억제제는 VC, Cr3C2, TaNbC, TiC, 오산화 바나듐(V2O5), 삼산화 바나듐(V2O3), 삼산화 크롬(Cr2O3), 오산화 탄탈륨(Ta2O5), 오산화 니오비움(Nb2O5), 이산화 티타늄(TiO2) 중 어느 하나 이상인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 제1혼합공정의 기계적 혼합 방법은 무중력 혼합기, 브이믹서(V-mixer), 와이믹서(Y-mixer), 볼 밀링(Ball milling), 더블 콘 믹서(Double cone mixer), 삼차원 혼합기, 슈퍼믹서(Super mixer) 중의 어느 하나의 혼합기를 이용하여 혼합하는 방법인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 하소공정의 하소조건이 500∼1000℃, 10∼240분, 대기분위기 조건인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 환원공정의 환원조건이 500∼1000℃, 2∼10시간, 수소분위기 조건인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
- 제 1 항에 있어서, 상기 침탄공정의 침탄조건이 600∼1000℃, 2∼10시간, 수소분위기 조건인 것을 특징으로 하는 초미립 텅스텐카바이드-코발트 복합분말 제조방법.
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KR1020060024813A KR100769348B1 (ko) | 2006-03-17 | 2006-03-17 | 초미립 텅스텐카바이드-코발트 복합분말 제조방법 |
US11/413,348 US7470309B2 (en) | 2006-03-17 | 2006-04-27 | Manufacturing method for ultra fine composite powder of tungsten carbide and cobalt |
CNA2006800105238A CN101151114A (zh) | 2006-03-17 | 2006-06-27 | 用于碳化钨和钴的超细复合粉末的制造方法 |
PCT/KR2006/002476 WO2007108575A1 (en) | 2006-03-17 | 2006-06-27 | Manufacturing method for ultra fine composite powder of tungsten carbide and cobalt |
JP2008506388A JP2008525646A (ja) | 2006-03-17 | 2006-06-27 | 超微粒タングステンカーバイド−コバルト複合粉末の製造方法 |
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KR1020060024813A KR100769348B1 (ko) | 2006-03-17 | 2006-03-17 | 초미립 텅스텐카바이드-코발트 복합분말 제조방법 |
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KR20070094301A KR20070094301A (ko) | 2007-09-20 |
KR100769348B1 true KR100769348B1 (ko) | 2007-11-27 |
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US (1) | US7470309B2 (ko) |
JP (1) | JP2008525646A (ko) |
KR (1) | KR100769348B1 (ko) |
CN (1) | CN101151114A (ko) |
WO (1) | WO2007108575A1 (ko) |
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KR100545897B1 (ko) * | 2003-04-29 | 2006-01-24 | 한국기계연구원 | 초미립 TiC- 전이금속계 복합분말 제조방법 |
KR100536062B1 (ko) * | 2003-05-07 | 2005-12-12 | 한국기계연구원 | 나노구조형 TaC- 천이금속계 복합분말 제조방법 |
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