KR20180130520A - H-aln 및 ti1-xalxcynz 층들을 구비한 코팅된 절삭 공구 - Google Patents
H-aln 및 ti1-xalxcynz 층들을 구비한 코팅된 절삭 공구 Download PDFInfo
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Abstract
Description
도 2a 및 도 2b 는 (본 발명에 따른) 샘플 #2 의 단면도 (도 2a) 및 표면 상의 상면도 (도 2b) 의 SEM 현미경 사진들을 보여준다.
도 3a 및 도 3b 는 (본 발명에 따른) 샘플 #3 의 단면도 (도 3a) 및 표면 상의 상면도 (도 3b) 의 SEM 현미경 사진들을 보여준다.
도 4a 및 도 4b 는 (비교예) 샘플 #4 의 단면도 (도 4a) 및 표면 상의 상면도 (도 4b) 의 SEM 현미경 사진들을 보여준다.
도 5a 및 도 5b 는 (본 발명에 따른) 샘플 #5 의 단면도 (도 5a) 및 표면 상의 상면도 (도 5b) 의 SEM 현미경 사진들을 보여준다.
도 6a 및 도 6b 는 (비교예) 샘플 #6 의 단면도 (도 6a) 및 표면 상의 상면도 (도 6b) 의 SEM 현미경 사진들을 보여준다.
Claims (13)
- 초경합금, 서멧, 세라믹, 강 또는 입방정 질화붕소의 기판 및 다층의 내마모성 코팅으로 구성된 코팅된 절삭 공구로서,
상기 다층의 내마모성 코팅은 5 ~ 25 ㎛ 의 총 두께를 가지고 화학 기상 증착 (CVD) 또는 적당한 온도의 화학 기상 증착 (MT-CVD) 에 의해 성막된 내화 코팅 층들을 포함하고,
상기 다층의 내마모성 코팅은 적어도 한 쌍의 층들 (a, b) 을 포함하고 층 (b) 은 층 (a) 의 바로 위에 성막되고,
- 층 (a) 은 육방 결정 구조 (h-AlN), 및 5 at.-% 미만, 바람직하게 2.5 at.-% 미만, 가장 바람직하게 1 at.% 미만 또는 2 ~ 3 at.-% 의 염소 함량과 10 ㎚ ~ 750 ㎚ 의 두께를 가지는 질화 알루미늄의 층이고,
- 층 (b) 은, 0.4 ≤ x ≤ 0.95, 0 ≤ y ≤ 0.10 이고 0.85 ≤ z ≤ 1.15 인, 일반식 Ti1-xAlxCyNz 로 나타내고, 0.5 ㎛ ~ 15 ㎛ 의 두께를 가지는 티타늄 알루미늄 질화물 또는 티타늄 알루미늄 탄질화물의 층이고, 층 (b) 의 Ti1-xAlxCyNz 의 적어도 90% 는 면심 입방정 (fcc) 결정 구조를 가지고,
- 상기 다층의 내마모성 코팅은 티타늄 질화물 (TiN), 티타늄 탄질화물 (TiCN), 티타늄 알루미늄 질화물 (TiAlN) 및 티타늄 알루미늄 탄질화물 (TiAlCN) 로 구성된 군에서 선택된 층을 포함하고, 상기 층은 (a) 유형의 제 1 h-AlN 층 바로 아래에 성막되고 바람직하게 주상 결정립 모폴로지를 가지는, 코팅된 절삭 공구. - 제 1 항에 있어서,
상기 다층의 내마모성 코팅은 한 쌍의 층들 (a, b) 을 포함하고,
또는
상기 다층의 내마모성 코팅은 일련의 두 쌍 이상의 층들 (a, b), 바람직하게 일련의 2, 3, 4, 5, 6, 7, 8, 9, 또는 10 쌍의 층들 (a, b) 을 포함하는, 코팅된 절삭 공구. - 제 1 항 또는 제 2 항에 있어서,
(a) 유형의 h-AlN 층(들)의 두께는 10 ㎚ ~ 400 ㎚, 바람직하게 25 ㎚ ~ 250 ㎚, 보다 바람직하게 40 ㎚ ~ 100 ㎚ 인, 코팅된 절삭 공구. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
(b) 유형의 fcc-Ti1-xAlxCyNz 층(들)의 두께는 1 ㎛ ~ 8 ㎛ 인, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
층 (b) 이 층 (a) 의 바로 위에 성막된 상태에서 각 쌍의 층들 (a, b) 내에서 (a) 유형의 h-AlN 층(들)의 두께 대 (b) 유형의 Ti1-xAlxCyNz 층(들)의 두께의 두께 비는 0.01 ~ 0.5 의 범위 내에 있는, 코팅된 절삭 공구. - 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,
층 (b) 이 층 (a) 의 바로 위에 성막된 상태에서 한 쌍의 층들 (a, b) 내에서 (b) 유형의 Ti1-xAlxCyNz 층(들)은 주상 결정립 모폴로지 및 텍스처 계수 TC (111) > 1.8 로 특징짓는 바람직한 결정 성장 배향을 가지고, 상기 TC (111) 은 다음과 같이 규정되고:
여기에서
I(111) = (111) 반사의 측정된 강도
I 0 (111) = 적용된 JCPDF-카드 00-046-1200 번에 따른 표준 분말 회절 데이터의 (111) 반사의 표준 강도
I(hkl) i = (hkl) i 반사의 측정된 강도
I 0 (hkl) i = 적용된 JCPDF-카드 00-046-1200 번에 따른 표준 분말 회절 데이터의 (hkl) i 반사의 표준 강도
n = 계산에 사용된 반사 수 (여기에서: n = 4)
(hkl) i 사용된 (hkl) i 반사는: (111), (200), (220) 및 (311) 인, 코팅된 절삭 공구. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
(a) 유형의 제 1 h-AlN 층 바로 아래에 성막된 층은 텍스처 계수 TC (200) > 1.8 로 특징짓는 바람직한 결정 성장 배향을 가지고, 상기 TC (200) 은 다음과 같이 규정되고:
여기에서
I(200) = (200) 반사의 측정된 강도
I 0 (200) = 상기 층이 TiAlN 또는 TiAlCN 층일 때 적용된 JCPDF-카드 00-046-1200 번에 따른, 그리고 상기 층이 TiN 또는 TiCN 층일 때 JCPDF 카드 00-42-1489 번에 따른 표준 분말 회절 데이터의 (200) 반사의 표준 강도
I(hkl) i = (hkl) i 반사의 측정된 강도
I 0 (hkl) i = 상기 층이 TiAlN 또는 TiAlCN 층일 때 적용된 JCPDF-카드 00-046-1200 번에 따른, 그리고 상기 층이 TiN 또는 TiCN 층일 때 JCPDF 카드 00-42-1489 번에 따른 표준 분말 회절 데이터의 (hkl) i 반사의 표준 강도
n = 계산에 사용된 반사 수 (여기에서: n = 4)
(hkl) i 사용된 (hkl) i 반사는: (111), (200), (220) 및 (311) 인, 코팅된 절삭 공구. - 제 1 항 내지 제 7 항 중 어느 한 항에 있어서,
(a) 유형의 제 1 h-AlN 층 바로 아래에 성막된 층은 티타늄 탄질화물 (TiCN) 의 층이고 텍스처 계수 TC (422) > 1.8 로 특징짓는 바람직한 결정 성장 배향을 가지고, 상기 TC (422) 는 다음과 같이 규정되고:
여기에서
I(422) = (422) 반사의 측정된 강도
I 0 (422) = 적용된 JCPDF-카드 00-42-1489 번에 따른 표준 분말 회절 데이터의 (422) 반사의 표준 강도
I(hkl) i = (hkl) i 반사의 측정된 강도
I 0 (hkl) i = 적용된 JCPDF-카드 00-42-1489 번에 따른 표준 분말 회절 데이터의 (hkl) i 반사의 표준 강도
n = 계산에 사용된 반사 수 (여기에서: n = 5)
(hkl) i 사용된 (hkl) i 반사는: (111), (200), (220), (311) 및 (422) 인, 코팅된 절삭 공구. - 제 1 항 내지 제 8 항 중 어느 한 항에 있어서,
(a) 유형의 제 1 h-AlN 층 바로 아래에 성막된 층은 티타늄 알루미늄 질화물 (TiAlN) 또는 티타늄 알루미늄 탄질화물 (TiAlCN) 의 층이고 텍스처 계수 TC (111) > 1.8 로 특징짓는 바람직한 결정 성장 배향을 가지고, 상기 TC (111) 은 다음과 같이 규정되고:
여기에서
I(111) = (111) 반사의 측정된 강도
I 0 (111) = 적용된 JCPDF-카드 00-046-1200 번에 따른 표준 분말 회절 데이터의 (111) 반사의 표준 강도
I(hkl) i = (hkl) i 반사의 측정된 강도
I 0 (hkl) i = 적용된 JCPDF-카드 00-046-1200 번에 따른 표준 분말 회절 데이터의 (hkl) i 반사의 표준 강도
n = 계산에 사용된 반사 수 (여기에서: n = 4)
(hkl) i 사용된 (hkl) i 반사는: (111), (200), (220) 및 (311) 인, 코팅된 절삭 공구. - 제 1 항 내지 제 9 항 중 어느 한 항에 있어서,
층 (b) 의 Ti1-xAlxCyNz 의 적어도 95%, 바람직하게 적어도 97% 가 면심 입방정 (fcc) 결정 구조를 가지는, 코팅된 절삭 공구. - 제 1 항 내지 제 10 항 중 어느 한 항에 있어서,
(a) 유형의 상기 제 1 h-AlN 층(들)의 W 함량은 0.1 at.-% 미만인, 코팅된 절삭 공구. - 제 1 항 내지 제 11 항 중 어느 한 항에 있어서,
(a) 유형의 상기 제 1 h-AlN 층(들)의 Co 함량은 0.1 at.-% 미만인, 코팅된 절삭 공구. - 제 1 항 내지 제 12 항 중 어느 한 항에 있어서,
(a) 유형의 상기 제 1 h-AlN 층(들)의 Ti 함량은 0.5 at.-% 미만, 바람직하게 0.3 at.-% 미만인, 코팅된 절삭 공구.
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