Coating for cutting implements
A cutting implement having a pair of cutting blades and a coating is provided. The coating has titanium chromium nitride and provides the cutting blades with a satin silver appearance. In some embodiments, the titanium chromium nitride coating has a thickness in a range between about 0.3 microns and 0.5 microns, a surface roughness in a range of about 15 to 25 10 −6 inch/inch, and a hardness in a range of about 5.7 to about 9.1 gegapascals.
1 . A cutting implement comprising:
a pair of complementary cutting blades, each having a cutting edge; and
a coating disposed on each of the complementary cutting blades, wherein the coating has greater than about 50% by weight of titanium nitride and less than about 50% by weight of chromium nitride.
2 . A cutting implement according to claim 1 , wherein the coating provides the cutting blades with a satin gold appearance.
3 . A cutting implement according to claim 1 , wherein the coating is applied to the blades by a process selected from the group consisting of chemical vapor deposition, physical vapor deposition, reactive magnetron sputtering, and cathode arc plasma.
4 . The cutting implement according to claim 1 , wherein the cutting implement is selected from the group consisting of a pair of scissors, a rotary style paper trimmer, and a guillotine paper trimmer.
5 . The cutting implement according to claim 4 , wherein the coating has a thickness in a range between 0.3 and 0.5 microns.
6 . A cutting implement according to claim 4 , wherein the coating has a hardness in a range of about 7.2 to about 7.6 gigapascals.
7 . A cutting implement comprising:
a pair of complementary cutting blades, each having a cutting edge; and
a coating disposed on each of the complementary cutting blades, the coating comprising chromium nitride and titanium nitride, wherein the coating includes titanium nitride in a range of about 60% by weight to about 90% by weight and includes chromium nitride in a range of about 10% by weight to about 40% by weight.
8 . A cutting implement according to claim 7 ,wherein the coating has about 90 percent by weight of titanium nitride and about 10 percent by weight chromium nitride.
9 . A cutting implement according to claim 7 ,wherein the coating is has about 60 percent by weight of titanium nitride and about 40 percent by weight chromium nitride.
10 . A cutting implement according to claim 7 , wherein the coating has about 75 percent by weight of titanium nitride and about 25 percent by weight chromium nitride.
11 . A cutting implement according to claim 7 , wherein the coating further comprises titanium chromium nitride.
12 . A cutting implement according to claim 7 , wherein the coating provides the cutting blades with a satin gold appearance.
13 . A cutting implement according to claim 7 , wherein the coating has a hardness in a range of about 6.1 gigapascals to about 9.1 gigapascals.
14 . The cutting implement according to claim 7 , wherein the cutting implement is selected from the group consisting of a pair of scissors, a rotary style paper trimmer, and a guillotine paper trimmer.
15 . The cutting implement according to claim 14 , wherein the coating has a thickness in a range between 0.3 and 0.5 microns.
16 . A cutting implement comprising:
a pair of complementary cutting blades, each having a cutting edge; and
a coating disposed on each of the complementary cutting blades, the coating comprising chromium nitride and titanium nitride, wherein the coating provides the blades with a satin gold appearance.
17 . The cutting implement according to claim 12 , wherein the coating has a hardness in a range of about 5.8 gigapascals to about 9.1 gigapascals.
18 . A cutting implement comprising:
a cutting blade, having a cutting edge; and
a coating having a satin gold appearance disposed on the cutting blade, the coating including chromium nitride, titanium nitride, and titanium chromium nitride, wherein the coating has a thickness in a range between about 0.3 to about 0.5 microns.
19 . The cutting implement according to claim 18 , wherein the coating includes titanium nitride in a range of about 60% by weight to about 90% by weight and includes chromium nitride in a range of about 10% by weight to about 40% by weight.
20 . The cutting implement according to claim 19 , wherein the coating has a hardness in a range of about 5.8 gigapascals to about 9.1 gigapascals.