Title:
A hard tunic, a cutting tool, and a manufacturing method of a hard tunic
Document Type and Number:
Japanese Patent JP6120229
Kind Code:
B2
Abstract:
A hard coating includes two first crystalline phases, and a second crystalline phase disposed between the two first crystalline phases. The two first crystalline phases each include, independently, a laminate structure having a Ti 1-x1 Al x1 N phase having a sodium chloride-type crystal structure, and an Al x2 Ti 1-x2 N phase having a sodium chloride-type crystal structure that are alternately stacked. An Al composition ratio x1 of the Ti 1-x1 Al x1 N phase satisfies a relationship 0.5 ¤ x1 ¤ 0.75, and an Al composition ratio x2 of the Al x2 Ti 1-x2 N phase satisfies a relationship 0.75 < x2 ¤ 0.95. The laminate structure includes a region in which an Al concentration periodically changes along a stacking direction of the Ti 1-x1 Al x1 N phase and the Al x2 Ti 1-x2 N phase. In this region, a difference between a maximum value of the Al composition ratio x2 and a minimum value of the Al composition ratio x1 is greater than 0.25. The second crystalline phase contains AlN having a wurtzite-type crystal structure.
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Inventors:
Passat Anonsack
Takanori Idani
Takanori Idani
Application Number:
JP2015005295A
Publication Date:
April 26, 2017
Filing Date:
January 14, 2015
Export Citation:
Assignee:
Sumitomo Electric Hardmetal Corp.
International Classes:
C23C16/34; B23B27/14; B23B51/00; B23C5/16; B23D77/00; B23F21/00; B23G5/06; C23C16/52
Domestic Patent References:
| JP2014133267A | ||||
| JP2014129562A | ||||
| JP2013510946A | ||||
| JP2011516722A | ||||
| JP2016049573A | ||||
| JP2016064485A |
Attorney, Agent or Firm:
Fukami patent office