US2007274855A1PendingUtilityA1
Steel Alloy For Cutting Details
Est. expiryMar 26, 2024(expired)· nominal 20-yr term from priority
C22C 38/04C22C 38/44C22C 38/001C22C 38/02C22C 38/22
45
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
The invention relates to a steel alloy of the following composition (in % by weight) C 0.40-0.60 Si 0.1-1.0 Mn 0.3-1.0 Cr 12-15 MO 2.5-4.0 Ni 0-1.0 Co 0-4.0 N 0.15-0.20, with the balance Fe as well as normally occurring impurities, the hardness being >56 HRC, which has been attained without deep freezing, as well as PRE>25, defined as PRE=% Cr+3.3•% Mo+16•% N. Furthermore, the steel alloy comprises carbides, nitrides and/or carbonitrides the maximal diameter of which does not exceed 5 μm. This steel alloy has turned out surprisingly well suitable as edge material for a plurality of cutting operations.
Claims
exact text as granted — not AI-modified1 . Steel alloy characterized in having the following composition (in % by weight)
C
0.40-0.60
Si
0.1-1.0
Mn
0.3-1.0
Cr
12-15
Mo
2.5-4.0
Ni
0-1.0
Co
0-4.0
N
0.15-0.20,
with the balance Fe as well as normally occurring impurities, the hardness being >56 HRC, which should be possible to be attained by hardening without deep freezing, as well as PRE>25, defined as PRE=% Cr+3.3•% Mo+16•% N.
2 . Steel alloy according to claim 1 , wherein C=0.42-0.60% by weight.
3 . Steel alloy according to claim 1 , wherein Si=0.15-0.80% by weight.
4 . Steel alloy according to claim 1 , wherein Mn=0.4-0.8% by weight.
5 . Steel alloy according to claim 1 , wherein Cr=13-15% by weight.
6 . Steel alloy according to claim 1 , wherein Mo=2.6-4.0% by weight.
7 . Steel alloy according to claim 1 , wherein the steel alloy comprises carbides, nitrides and/or carbonitrides, wherein a maximal diameter of the carbides, nitrides and/or carbonitrides does not exceed 5 μm.
8 . Knife comprising the steel alloy according to claim 1 .
9 . Cutting edges for either dry or wet shaving comprising the steel alloy according to claim 1 .
10 . Cutting tool for surgical applications comprising the steel alloy according to claim 1 .
11 . Doctor blade or creping blade comprising the steel alloy according to claim 1 .
12 . Steel alloy according to claim 2 , wherein C=0.42-0.50% by weight.
13 . Steel alloy according to claim 3 , wherein Si=0.15-0.55% by weight.
14 . Steel alloy according to claim 4 , wherein Mn=0.4-0.7% by weight.
15 . Steel alloy according to claim 5 , wherein Cr=14-15% by weight.
16 . Steel alloy according to claim 6 , wherein Mo=2.6-3.0% by weight.
17 . A steel alloy, comprising:
a composition including (in % by weight): C 0.40-0.60 Si 0.1-1.0 Mn 0.3-1.0 Cr 12-15 Mo 2.5-4.0 Ni 0-1.0 Co 0-4.0 N 0.15-0.20 balance Fe as well as normally occurring impurities; a hardness>56 HRC; and a value for PRE>25, wherein PRE=% Cr+3.3•% Mo+16•% N.
18 . The steel alloy of claim 17 , wherein the hardness is attained by hardening without deep freezing.Cited by (0)
No later patents cite this yet.
References (0)
No backward citations on record.