KR101053756B1 - 비결정질 합금의 열가소성 주조 - Google Patents
비결정질 합금의 열가소성 주조 Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/11—Making amorphous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/008—Amorphous alloys with Fe, Co or Ni as the major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/10—Amorphous alloys with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium or Hf as the major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/186—High-melting or refractory metals or alloys based thereon of zirconium or alloys based thereon
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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Abstract
Description
표 I: Vitreloy 1에 대한 공정 조건(변형률 대 온도) |
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변형률 컨트롤(s-1) | 온도(℃) | 응력 수준(MPa) |
0.1 | 최소 400℃ | 최대 10-30MPa |
1.0 | 최소 430℃ | 최대 15-20MPa |
10 | 최소 450℃ | 최대 20-30MPa |
표 II: 부품의 성형성, Vitreloy-1 |
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몰딩 단계 B에서의 액체의 변형률 (s-1) |
단계 B에서의 TPC 온도 |
이용 가능한 공정 시간(s) |
달성 가능한 총 몰딩 변형(L/D) |
0.1 | 400℃ | 1500 | 150 |
1.0 | 430℃ | 900 | 900 |
10 | 450℃ | 600 | 6000 |
표 Ⅲ: TPC 공정 단계 |
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단계 | 온도 | 압력 제어 | 변형률 | 공정 시간 |
단계 A: 급냉 |
시작: Tm 이상 종료: TPC 구역 Tnose>T>Tg |
용융체를 게이트 및 공구를 통해 주형 내에 이동 시키는 데 사용한 압력은 ≤10MPa임. |
변형률은 도 6에 의해 측정된 임계값을 초과하지 않아야 함. 바람직하게는 ~100 내지 100임. |
급냉 단계중 결정화를 피함. 냉각 속도는 TTT-다이어그램에 의해 결정 됨(즉, Tnose에서 결정화 시간 tx). |
단계 B: TPC 몰딩 |
시작 및 유지: Tnose>T>Tg |
압력은 용융체 불안정성 및 다이 공구 상 마모를 피하기 위해 임계값 미만으로 유지되어야 하며, ~10MPa 이하가 바람직하지만, 주형 부품에 적합해야 함. |
부품의 열가소성 몰딩에 사용된 변형률은 주어진 몰딩 온도에서 임계 변형률을 초과하지 않아야 함. 도 6 참조. 전형적 변형률은 0.1/s 내지 10/s. |
이용 가능한 공정시간은 TTT-다이어그램에 의해 결정됨. 결정화의 개시 또는 상분리의 개시를 피해야 함. 소요시간은 부품을 몰딩하는 데 필요한 총변형에 의해 결정됨. |
단계 C: 최종 냉각 |
시작: Tnose>T>Tg 종료: 주변온도 또는 주변온도 근방 또는 T≪Tg |
압력은 주변 압력 까지 떨어짐. |
변형률 없이 몰딩이 완결됨. |
전반적 사이클 시간을 최소화하도록 시간을 최소화함. |
표 IV: 임계 냉각 속도 |
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합금 | 실험적 주조 두께(cm) | 임계 냉각 속도 | |
실린더 | 판 | ||
Vitreloy 1 | 4.1cmc | 2.9cm | 1.8K/sm |
Vitreloy 101 | 0.35cmm | 0.25cm | 247K/sc |
Vitreloy 4 | 1.2cmm | 0.9cm | 21K/sc
26K/sm |
Vitreloy 106a | 1.9cmc | 1.35cm | 7K/sm |
Fe계 유리 | 0.35cmm | 0.25cm | 247K/sc |
Ni계 유리 | 0.3cmm | 0.21cm | 340K/s |
Claims (91)
- 비결정질 합금(amorphouse alloy)을 열가소적으로(thermoplastically) 주조하는 방법으로서,융점(Tm)보다 높은 온도에서 용융 상태의 비결정질 합금을 제공하는 단계;상기 비결정질 합금의 유리 전이 온도보다 높고 결정화 노우즈 온도(TNOSE) 보다 낮은, 중간 열가소성 성형 온도 범위로 상기 용융된 비결정질 합금을 바로 냉각하는 단계;상기 비결정질 합금의 온도를 상기 중간 열가소성 성형 온도 범위에서 안정화시키는 단계;비결정질의 몰딩된 부품을 성형하기 위해, 상기 비결정질 합금을 뉴톤형 점성 유동 상태(Newtonian viscous flow regime)에 유지시키는 성형 압력과 상기 중간 열가소성 성형 온도 범위에서, 상기 비결정질 합금을 성형하는 단계; 및상기 몰딩된 부품을 주변 온도로 냉각하는 단계를 포함하되,상기 결정화 노우즈 온도(TNOSE)는 상기 비결정질 합금의 결정화가 최단시간에 일어나는 온도로 정의되며, 상기 중간 열가소성 성형 온도 범위로 상기 용융된 비결정질 합금을 바로 냉각하는 단계는 비결정질 합금의 임계 냉각 속도보다 높은 속도에서 일어나고,상기 성형 단계는 가열 성형 장치를 사용하여 수행되며, 상기 가열 성형 장치는 팽창 구역(expansion zone)을 포함하고, 상기 팽창 구역은 상기 비결정질 합금의 온도가 상기 결정화 노우즈 온도(TNOSE) 미만이 되도록 상기 용융된 비결정질 합금을 급속 냉각시키도록 설계된 열교환기와, 상기 열교환기의 두께보다 큰 두께를 갖는 팽창 영역을 포함하는 것을 특징으로 하는, 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 가열 성형 장치는 주형(mould), 다이 공구(die tool), 폐쇄된 다이 및 개방-캐비티 다이로 이루어진 군으로부터 선택되고, 상기 가열 성형 장치가 상기 비결정질 합금의 유리 전이 온도의 150℃ 범위 내의 온도로 유지되는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 성형 단계에 걸리는 시간이 상기 중간 열가소성 성형 온도 범위로 상기 용융된 비결정질 합금을 바로 냉각하는 단계보다 10배 내지 100배 더 긴 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 성형 압력이 상기 냉각 단계에서 상기 용융된 비결정질 합금에 인가되는 압력보다 10배 내지 100배 더 높은 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질 합금이 30℃ 이상의 초냉각된(supercooled) 액체 영역(△Tsc)을 가지되, 상기 △Tsc는, 20℃/분의 조건으로 표준 차분 스캐닝 열량측정(DSC) 스캔을 통해 결정된 값으로서, 상기 비결정질 합금의 결정화 온도(Tx)와 유리 전이 온도(Tg)의 차이로 정의되는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제5항에 있어서,상기 초냉각된 액체 영역(△Tsc)이 90℃ 이상인 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제5항에 있어서,상기 비결정질 합금은 Zr과 Ti를 포함하는 합금이고, 상기 Ti 함량과 Zr 함량의 합이 상기 비결정질 합금 조성의 20원자% 이상인 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제5항에 있어서,상기 비결정질 합금이 Fe계 합금이고, 상기 Fe 함량이 상기 비결정질 합금 조성의 40원자% 이상인 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제2항에 있어서,상기 성형 장치를 구성하는 재료는 상기 용융된 비결정질 합금보다 열 확산도(thermal diffusivity)가 큰 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
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- 제1항에 있어서,상기 비결정질 합금이 1,000℃/초 이하의 임계 냉각 속도를 가지며, 상기 열교환기는 1.5mm 이하의 채널 폭을 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품은 1.5% 이상의 탄성 한계를 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품이 5mm 이상의 최소 치수를 가지며, 상기 비결정질 합금은 1000℃ 이상의 임계 냉각 속도를 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품이 12mm 이상의 최소 치수를 가지며, 상기 비결정질 합금은 100℃ 이상의 임계 냉각 속도를 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품이 100 이상의 아스펙트비(aspect ratio)를 가진 복수의 섹션을 포함하는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품이 1.8% 이상의 탄성 한계와 1.0% 이상의 굽힘 연성(bending ductility)를 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
- 제1항에 있어서,상기 비결정질의 몰딩된 부품이 50MPa 미만의 열 응력을 갖는 것을 특징으로 하는 비결정질 합금의 열가소성 주조 방법.
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JP2010105049A (ja) | 2010-05-13 |
CN100372630C (zh) | 2008-03-05 |
KR101190440B1 (ko) | 2012-10-11 |
EP1499461A4 (en) | 2007-08-15 |
EP1499461A1 (en) | 2005-01-26 |
US7017645B2 (en) | 2006-03-28 |
JP5227979B2 (ja) | 2013-07-03 |
CN1638891A (zh) | 2005-07-13 |
KR20040073609A (ko) | 2004-08-19 |
KR20110041582A (ko) | 2011-04-21 |
WO2003064076A1 (en) | 2003-08-07 |
US20030222122A1 (en) | 2003-12-04 |
EP1499461B1 (en) | 2009-09-02 |
DE60329094D1 (de) | 2009-10-15 |
JP2005515898A (ja) | 2005-06-02 |
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