公开(公告)号：US20170209936A1

公开(公告)日：2017-07-27

申请号：US15103381

申请日：2015-08-28

Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.

Inventor： Hideaki Kanaoka ,  Shinya Imamura ,  Anongsack Paseuth ,  Takanori Detani

IPC: B23B27/14 ,  C23C16/40 ,  C23C16/02 ,  B23C5/20

CPC classification number: B23B27/148 ,  B23B2224/04 ,  B23B2224/28 ,  B23B2224/36 ,  B23B2228/04 ,  B23B2228/105 ,  B23C5/20 ,  B23C2224/04 ,  B23C2224/28 ,  B23C2224/36 ,  B23C2228/04 ,  B23C2228/10 ,  C23C16/029 ,  C23C16/403 ,  C23C16/45523

Abstract: A surface-coated cutting tool includes a base material and a coating formed on the base material. The coating includes an α-Al2O3 layer. The α-Al2O3 layer contains α-Al2O3 crystal grains and sulfur, and has a TC(006) of more than 5 in texture coefficient TC(hkl). The sulfur has a concentration distribution in which a concentration of the sulfur decreases in a direction away from a base-material-side surface of the α-Al2O3 layer, in a thickness direction of the α-Al2O3 layer.

公开(公告)号：US20170191169A1

公开(公告)日：2017-07-06

申请号：US15101858

申请日：2015-08-28

Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.

Inventor： Shinya Imamura ,  Hideaki Kanaoka ,  Anongsack Paseuth ,  Takanori Detani

IPC: C23C28/04 ,  C23C16/34 ,  C23C16/30 ,  C23C16/40 ,  B23B27/14 ,  C23C16/36

CPC classification number: C23C28/044 ,  B23B27/148 ,  C23C16/0272 ,  C23C16/308 ,  C23C16/34 ,  C23C16/36 ,  C23C16/403 ,  C23C16/56 ,  C23C28/042 ,  C23C30/005

Abstract: A coating included in a surface-coated cutting tool according to the present invention has an α-Al2O3 layer. In a 15-μm square color map of a processed surface in parallel to a surface of the α-Al2O3 layer, an area A1 occupied by coarse crystal grains A is ≦50% and an area A2 in the area A1 occupied by crystal grains having a (001) plane orientation is ≧90%, an area B1 occupied by medium-sized crystal grains B of α-Al2O3 is 20 to 50%, an area B2 in the area B1 occupied by crystal grains having the (001) plane orientation is ≧90%, an area C1 occupied by fine crystal grains C of α-Al2O3 is 10 to 50%, an area C2 in the area C1 occupied by crystal grains having the (001) plane orientation is ≧50%.

公开(公告)号：US20170189967A1

公开(公告)日：2017-07-06

申请号：US15100008

申请日：2015-07-13

Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.

Inventor： Anongsack Paseuth ,  Hideaki Kanaoka ,  Takanori Detani ,  Shinya Imamura

IPC: B23B27/14 ,  C23C28/04

CPC classification number: B23B27/14 ,  C23C16/403 ,  C23C16/56 ,  C23C28/042 ,  C23C28/044

Abstract: A surface-coated cutting tool according to the present invention includes a coating. The coating includes an α-Al2O3 layer. Each of the α-Al2O3 layers on a side of a rake face and a side of a flank face shows (001) orientation. In the α-Al2O3 layer on the rake face side, a length LR3 of a Σ3 crystal grain boundary exceeds 80% of a length LR3-29 of a Σ3-29 crystal grain boundary and is not lower than 10% and not higher than 50% of a total length LR of all grain boundaries. In the α-Al2O3 layer on the flank face side, a length LF3 of a Σ3 crystal grain boundary exceeds 80% of a length LF3-29 of a Σ3-29 crystal grain boundary and is not lower than 10% and not higher than 50% of a total length LF of all grain boundaries. A ratio LR3/LR3-29 is lower than a ratio LF3/LF3-29.