US 11,420,346 B2 · Coating for cutting implement

Abstract

A cutting implement including a metal substrate and a coating is provided. The coating has zirconium PVD (ZrCRTiNO), which provides protection against corrosion of the metal substrate. In some instances, the zirconium PVD provides protection from corrosion for at least 200 hours. A layer of titanium nitride (TiN) can be added to the coating to increase the hardness of the metal substrate. In such an embodiment, the layer of titanium nitride (TiN) is applied before the zirconium PVD (ZrCRTiNO). Titanium nitride (TiN) coated steel is 3 to 5 times harder than uncoated steel. Thus, a combination of titanium nitride (TiN) and zirconium PVD (ZrCRTiNO) as a coating on a metal substrate can increase the life of the metal substrate by providing increased hardness and anti-corrosive properties.

Claims19

Dependent claims

A cutting implement, comprising:

a polished metal substrate;
and
a coating disposed on the metal substrate, wherein said coating is ZrCRTiNO containing 40-90% zirconium (Zr), 3-30% chromium (Cr), and 1-10% titanium (Ti).

Dependencies are inferred from the claim text.

Facts

Application

16/997,523Filed 19 Aug 2020

Published

US 2022/0055235 A124 Feb 2022

Granted

23 Aug 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

B26B 13/00
Hand shears
C01B 21/076
Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one…:…
C01G 37/006
Compounds of chromium: compounds containing chromium, with or without oxygen or hydrogen, and containing two or more other elements
C23C 14/024
Pretreatment of the material to be coated: deposition of sublayers, e.g. to promote adhesion of the coating

Coating for cutting implement

Life of this patent

Coating for cutting implement

Life of this patent

Abstract

Claims19