KR102513063B1 - 코팅된 절삭 공구 - Google Patents
코팅된 절삭 공구 Download PDFInfo
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Abstract
Description
도 2 는 샘플 멀티 A24 의 α-Al2O3-다층의 파단된 단면의 주사 전자 현미경 (SEM) 이미지이다. 1 ㎛ 의 α-Al2O3-층은 α-Al2O3-다층 아래에서 볼 수 있다.
도 3 은 샘플 멀티 A32 의 코팅의 파단된 단면의 주사 전자 현미경 (SEM) 이미지이다. 1 ㎛ 의 α-Al2O3-층은 α-Al2O3-다층 아래에서 볼 수 있다.
도 4 는 샘플 멀티 A28u 의 α-Al2O3-다층의 폴리싱된 단면의 주사 전자 현미경 (SEM) 이미지이다.
도 5 는 샘플 멀티 A40u 의 파단된 단면의 주사 전자 현미경 (SEM) 이미지이다.
도 6 은 샘플 멀티 B38 의 코팅의 파단된 단면의 주사 전자 현미경 (SEM) 이미지이다.
도 7 은 샘플 멀티 B38 의 α-Al2O3-다층의 폴리싱된 단면의 주사 전자 현미경 (SEM) 이미지이다. 1 ㎛ 의 α-Al2O3-층은 α-Al2O3-다층 아래에서 볼 수 있다.
도 8 은 2 개의 α-Al2O3-서브층들 사이의 TiCO 서브층의 단면의 명시야 주사 투과 전자 현미경 (STEM; Bright Field Scanning Transmission Electron Microscope) 이미지이다.
도 9 는 샘플 멀티 A32 의 코팅의 α-Al2O3-다층의 일부의 단면의 HAADF 주사 투과 전자 현미경 (HAADF STEM) 이미지이다.
도 10 은 샘플 멀티 A32 의 코팅의 TiCO 서브층의 돌출부의 단면의 HAADF 주사 투과 전자 현미경 (HAADF STEM) 이미지이다. 111 평면 및 112 평면은 도면에서 선으로 표시된다. 뷰는 011 구역 축선을 따라 정렬된다.
도 11 은 샘플 멀티 A32 의 코팅의 TiCO 서브층의 돌출부의 단면의 HAADF 주사 투과 전자 현미경 (HAADF STEM) 이미지이다. 111 평면 및 112 평면은 도면에서 선으로 표시된다. 뷰는 011 구역 축선을 따라 정렬된다.
도 12 는 샘플 멀티 A28u 의 XRD 회절도이다. 보정이 강도 데이터에 대해 이루어지지 않고, Cu-Kα2 스트리핑이 적용되지 않는다. Al2O3 로부터 유래되는 피크들 (110, 113, 024, 116, 0 0 12 및 0 1 14) 은 도면에 표시된다.
도 13 은 샘플 싱글 A1 의 XRD 회절도이다. 보정이 강도 데이터에 대해 이루어지지 않고, Cu-Kα2 스트리핑이 적용되지 않는다. Al2O3 로부터 유래되는 피크들 (110, 113, 024, 116, 0 0 12 및 0 1 14) 은 도면에 표시된다.
Claims (15)
- 기재 및 코팅을 포함하는 코팅된 절삭 공구로서,
상기 코팅은 α-Al2O3 의 서브층들과 TiCO, TiCNO, AlTiCO 또는 AlTiCNO 의 서브층들이 교대하는 것으로 이루어진 α-Al2O3-다층을 포함하고, 상기 α-Al2O3-다층은 적어도 5 개의 α-Al2O3 의 서브층들을 포함하고,
상기 α-Al2O3-다층의 총 두께는 1 ~ 15 ㎛ 이고,
상기 α-Al2O3-다층의 주기는 50 ~ 900 nm 이고,
상기 α-Al2O3-다층은 20°~ 140°의 θ-2θ 스캔에 대한 XRD 회절을 나타내고, 1 1 3 회절 피크의 강도 (피크 면적), I(1 1 3), 1 1 6 회절 피크의 강도 (피크 면적), I(1 1 6), 및 0 2 4 회절 피크의 강도 (피크 면적), I(0 2 4) 에 대한 0 0 12 회절 피크의 강도 (피크 면적), I(0 0 12) 의 관계는
I(0 0 12)/I(1 1 3) > 1, I(0 0 12)/I(1 1 6) > 1 및 I(0 0 12)/I(0 2 4) > 1
인, 코팅된 절삭 공구. - 제 1 항에 있어서,
0 0 12 회절 피크의 강도 (피크 면적), I(0 0 12) 에 대한 0 1 14 회절 피크의 강도 (피크 면적), I(0 1 14) 는 I(0 1 14) /I(0 0 12) < 2 인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항에 있어서,
1 1 3 회절 피크의 강도 (피크 면적), I(1 1 3) 및 0 2 4 회절 피크의 강도 (피크 면적), I(0 2 4) 에 대한 1 1 0 회절 피크의 강도 (피크 면적), I(1 1 0) 의 관계는
I(110) > 각각의 I(113) 및 I(024)
인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항에 있어서,
1 1 0 회절 피크의 강도 (피크 면적), I(1 1 0) 에 대한 0 0 12 회절 피크의 강도 (피크 면적), I(0 0 12) 의 관계는
I(0 0 12) > I(110)
인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
TiCO, TiCNO, AlTiCO 또는 AlTiCNO 서브층은 돌출부들을 포함하고, 상기 돌출부들은 결정질인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 5 항에 있어서,
상기 돌출부들은 적어도 하나의 트윈 경계 (twin boundary) 를 포함하고, 상기 돌출부들은 (111) 평면을 쉐어 (share) 하고, 또한 <211> 방향으로 연장되는 것을 특징으로 하는, 코팅된 절삭 공구. - 제 5 항에 있어서,
연장된 방향으로의 상기 돌출부들의 길이는 10 ~ 100 nm 인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 5 항에 있어서,
상기 기재의 표면 법선에 수직한 방향으로 측정된 바와 같은 상기 돌출부들의 높이는 상기 다층의 주기 미만, 또는 상기 다층의 주기의 80 % 미만인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 α-Al2O3 서브층의 평균 두께는 40 ~ 800 nm 인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 코팅된 절삭 공구는 상기 기재와 상기 α-Al2O3-다층 사이에 위치되어 상기 α-Al2O3-다층과 직접 접촉하는 제 1 α-Al2O3-층을 더 포함하고, 상기 α-Al2O3-층의 두께는 < 1 ㎛ 인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 코팅된 절삭 공구는 상기 기재와 상기 α-Al2O3-다층 사이에 위치된 적어도 하나의 TiC, TiN, TiAlN 또는 TiCN 층을 포함하는 것을 특징으로 하는, 코팅된 절삭 공구. - 제 11 항에 있어서,
상기 TiC, TiN, TiAlN 또는 TiCN 층의 두께는 2 ~ 15 ㎛ 인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 코팅의 최외측 층은 α-Al2O3 층인 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 기재는 초경 합금, 서멧, 세라믹, 고속도강 또는 cBN 을 갖는 것을 특징으로 하는, 코팅된 절삭 공구. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 기재는 3 ~ 14 wt% 의 Co 및 50 wt% 초과의 WC 를 포함하는 초경 합금을 갖는 것을 특징으로 하는, 코팅된 절삭 공구.
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