KR102229047B1 - 공진 음향 믹서를 사용함으로써 초경합금 또는 서멧 분말을 제조하는 방법 - Google Patents
공진 음향 믹서를 사용함으로써 초경합금 또는 서멧 분말을 제조하는 방법 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/60—Mixing solids with solids
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- B01F31/80—Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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Abstract
Description
도 2 는 예 5 및 예 6 으로부터 본 발명 5 와 비교 3 을 비교하는 입자 치수 분포를 나타내는 히스토그램을 도시한다.
도 3 은 예 5 로부터 발명 4 의 LOM 현미경 사진을 도시한다.
도 4 는 예 7 에서 비교 4 의 LOM 현미경 사진을 도시한다.
슬러리 | Co (중량%) | Co (μm) | Cr3C2 (중량%) | WC (μm) | PEG 중량% |
조성 1 | 10.0 | 0.5 | 0.5 | 0.8 | 2 |
조성 2a | 6.0 | 0.5 | - | 2.5 | 2 |
조성 2b | 6.0 | 0.5 | - | 5 | 2 |
조성 3a | 6.3 | 0.9 | - | 5 | 2 |
조성 3b | 6.0* | 0.9 | - | 5* | 2 |
분말들 | 조성 | 믹서 | 혼합 시간 (s) | 에너지 (G) |
발명 1 | 조성 1 | RAM | 300 | 95 |
비교 1 | 조성 1 | Natalie | 300 | 해당없음 |
분말들 | 밀도 (g/cm3) | Com | Hc (kA/m) |
공극율 | HV3 |
발명 1 | 14.47/14.46 | 8.06/8.03 | 18.76/18.77 | A00, B00, C00 | 1676/1706 |
비교 1 | 14.11/14.32 | 8.30/7.69 | 18.97/18.50 | A00, B00, C00 Co 풀들 (pools) |
1643/1701 |
참조 1 | 14.48 | 8.5 | 20.4 | A00, B00, C00 | 1650 |
분말들 | 조성 | 믹서 | 혼합 시간 (s) | 에너지 (G) |
발명 2 | 조성 2a | RAM | 300 | 95 |
비교 2 | 조성 2a | Natalie | 300 | 해당없음 |
분말들 | 밀도 (g/cm3) | Com | Hc (kA/m) |
공극율 | HV3 |
발명 1 | 15.00/14.98 | 5.30/5.36 | 9.90/9.81 | A00, B00, C00 | 1408/1536 |
비교 1 | 14.79/14.77 | 5.36/5.34 | 9.76/9.77 | A00, B00, C00 Co 풀들 (pools) |
1419/1502 |
참조 1 | 14.95 | 5.7 | 11.7 | 해당없음 | 1430 |
분말들 | 조성 | 믹서 | 혼합 시간 (s) | 에너지 (G) |
발명 3 | 조성 3a | RAM | 300 | 95 |
분말들 | 밀도 (g/cm3) | Com | Hc (kA/m) |
공극율 | HV30 |
발명 3 | 14.97 | 5.72 | 5.65 | A02, B00, C00 | 1240 |
비교 3 | 14.95 | 5.7 | 6.8 | <A02 | 1280 |
Co 함량 (중량%) | WC 모폴로지 | 혼합 전의 WC 입자 치수 (μm, FSSS) |
|
발명 4 | 6 | 구형 | 1.5 |
발명 5 | 11 | 구형 | 1.5 |
Co (중량%) |
WC 모폴로지 |
밀링 전의 WC 입자 치수 (μm, FSSS) |
|
비교 3 | 11 | 각형 | 4 |
Co (중량%) |
WC 모폴로지 |
밀링 전의 WC 입자 치수 (μm, FSSS) |
|
비교 4 | 6 | 둥근형 | 4 |
WC 원료 (μm) |
소결된 WC (μm) |
경도 (HV30) |
자기 포화 % | HC (kA/m) |
라일리 비 | 공극율 | |
발명 4 | 1.5 | 2 | 1270 | 93 | 5.6 | 1.16 | A02, B00, C00 |
발명 5 | 1.5 | 1.5 | 1250 | 90 | 8.2 | 1.29 | A02, B00, C00 |
비교 3 | 4 | 4.5 | 1250 | 90 | 8.4 | 1.75 | A02, B00, C00 |
비교 4 | 6 | 4.5 | 1300 | 90 | 6.8 | 1.17 | A02, B00, C00 |
Claims (15)
- 초경합금 또는 서멧 바디를 제조하는 방법으로서,
- 경질 성분들 및 금속 바인더를 형성하는 분말들을 포함하는 분말 블렌드를 형성하는 단계;
- 상기 분말 블렌드가, 사용되는 주파수가 20 ~ 80 Hz 이고 공진 조건을 달성하는 음향파들 (acoustic waves) 이 혼합된 분말 블렌드를 형성하기 위해 사용되는 비접촉식 믹서를 사용하는 혼합 작업을 거치게 하는 단계;
- 상기 혼합된 분말 블렌드가 성형 및 소결 작업을 거치게 하는 단계를 포함하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항에 있어서,
사용되는 주파수는 50 ~ 70 Hz 인, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항에 있어서,
유기 바인더는 상기 분말 블렌드에 첨가되는 것을 특징으로 하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항에 있어서,
상기 혼합 작업 전에 슬러리를 형성하도록 혼합 액체가 상기 분말 블렌드에 첨가되는 것을 특징으로 하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 4 항에 있어서,
상기 슬러리는 스프레이 건조에 의해서 행해지는 건조 단계를 거치는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항에 있어서,
상기 경질 성분들 중 하나 이상은 주기율 표의 4 족, 5 족 및 6 족으로부터의 금속들의 붕화물들, 탄화물들, 질화물들 또는 탄질화물들로부터 선택되는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
상기 바인더 금속 분말은 하나의 단일 바인더 금속, 또는 2 개 이상의 금속들의 분말 블렌드, 또는 2 개 이상의 금속들의 합금의 분말 중 어느 하나이며, 상기 바인더 금속들은 Cr, Mo, Fe, Co 또는 Ni 로부터 선택되는 것을 특징으로 하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
상기 소결은 1350 내지 1500 ℃ 의 소결 온도에서 가스 압력 소결에 의해서 행해지는 것을 특징으로 하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
상기 소결은 1350 내지 1500 ℃ 의 소결 온도에서 진공 소결에 의해서 행해지는 것을 특징으로 하는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
초경합금 바디가 제조되는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 10 항에 있어서,
WC 원료는 단결정이고, 소결 후의 WC 입자들은 구형 또는 각형 모폴로지를 갖는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 11 항에 있어서,
소결 후의 입자들은 구형 모폴로지와 1.5 미만의 라일리 비를 갖는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 11 항에 있어서,
소결 후의 입자들은 라일리 비가 1.5 초과인 각형 모폴로지를 갖는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
서멧 바디가 제조되는, 초경합금 또는 서멧 바디를 제조하는 방법. - 제 1 항 내지 제 6 항 중 어느 한 항의 방법에 따라 제조된 초경합금.
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EP11185483.2A EP2584057B1 (en) | 2011-10-17 | 2011-10-17 | Method of making a cemented carbide or cermet powder by using a resonant acoustic mixer |
EP11185483.2 | 2011-10-17 | ||
EP12163181.6A EP2647731B1 (en) | 2012-04-04 | 2012-04-04 | Method of making a cemented carbide body |
EP12163181.6 | 2012-04-04 | ||
PCT/EP2012/070557 WO2013057136A2 (en) | 2011-10-17 | 2012-10-17 | Method of making a cemented carbide or cermet body |
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