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1. (WO2018100849) SURFACE-COATED CUTTING TOOL

Pub. No.:    WO/2018/100849    International Application No.:    PCT/JP2017/033965
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Thu Sep 21 01:59:59 CEST 2017
IPC: B23B 27/14
B23B 51/00
B23C 5/16
B23D 77/00
B23F 21/00
B23G 5/06
C23C 14/06
Applicants: SUMITOMO ELECTRIC HARDMETAL CORP.
住友電工ハードメタル株式会社
Inventors: TANAKA, Keizo
田中 敬三
SETOYAMA, Makoto
瀬戸山 誠
KOBAYASHI, Yutaka
小林 豊
KOBAYASHI, Akira
小林 啓
Title: SURFACE-COATED CUTTING TOOL
Abstract:
A surface-coated cutting tool which is provided with a base material and a coating film that covers the surface of the base material. The coating film comprises a super-multilayer structure layer in which layers A and layers B having a composition different from that of the layers A are alternately laminated from the base material side toward the surface side. The super-multilayer structure layer has a configuration wherein regions X, in which layers A having a thickness of AX and layers B having a thickness of BX are alternately laminated, and regions Y, in which layers A having a thickness of AY and layers B having a thickness of BY are alternately laminated, are alternately repeated from the base material side toward the surface side. The thickness AX of the layers A is larger than the thickness AY of the layers A; and the thickness BX of the layers B is smaller than the thickness BY of the layers B. The layers A and the layers B have a composition that is composed of one or more elements selected from the group consisting of Ti, Al, Cr, Si, Ta, Nb and W and one or more elements selected from the group consisting of C and N.