US2016115573A1PendingUtilityA1
Hot-work tool steel and a process for making a hot-work tool steel
Est. expiryMar 4, 2031(~4.7 yrs left)· nominal 20-yr term from priority
C21D 8/00B22F 1/00B22F 1/145C22C 38/38C22C 38/22C21D 6/007C22C 38/24C22C 38/46C22C 38/52C22C 33/0264C21D 2211/004C22C 38/001C21D 6/02C21D 6/005C21D 6/004B22F 2999/00C21D 1/32C22C 38/30C22C 38/54C22C 38/06C21D 6/002C21D 6/008C21D 9/0068C22C 38/04C22C 38/44C22C 38/58C22C 38/32C21D 1/25B22F 3/14C22C 38/02B22F 2998/10C21D 9/00
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Claims
Abstract
A low-chromium hot-work tool steel consisting of (in wt-%): C 0.08-0.40, N 0.015-0.30, C+N 0.30-0.50, Cr 1-4, Mo 1.5-3, V 0.8-1.3, Mn 0.5-2, Si 0.1-0.5, optionally Ni<3, Co≦5, B<0.01, Fe balance apart from impurities, and a process for making a low-chromium hot-work tool steel article having increased tempering resistance.
Claims
exact text as granted — not AI-modified1 . A low-chromium hot-work tool steel tool for at least one of working and forming metals at high temperatures consisting of (in wt-%):
C
0.08-0.40
N
0.015-0.30
C + N
0.30-0.50
Cr
1-4
Mo
1.5-3
V
0.8-1.3
Mn
0.5-2
Si
0.1-0.5
optionally
Ni
<3
Co
≦5
B
≦0.01
V(C,N) particles with sizes less than about 10 μm, and
Fe balance apart from impurities.
2 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.38
N
0.03-0.30
C + N
0.36-0.44
Cr
1-3
V
1.0-1.3
Mn
1-2
Ni
<1
Co
<4
B
0.001-0.01.
3 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.25-0.35
N
0.04-0.30
C + N
0.38-0.42
Cr
1.3-2.5.
4 . The low-chromium hot-work tool steel tool according to claim 3 consisting of (in wt-%):
N
0.042-0.15
C + N
0.39-0.41
Cr
1.3-2.3.
5 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.35
N
0.042-0.12
C + N
0.39-0.41
Cr
1.4-1.9
Mo/V
1.8-2.3
Cr/V
<2.
6 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.40
N
0.03-0.30
C + N
0.36-0.44
Cr
1.2-2.3
Mo
2.2-2.8
Mn
1-2
Si
0.1-0.4
Ni
<1
optionally
Co
3-5
B
0.001-0.01
Mo/V
1.8-2.3
Cr/V
<2.
7 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.40
N
0.03-0.30
Cr
1.2-2.3
Mn
1-2
Si
0.1-0.4
Ni
<1
optionally
Co
3-5
B
0.001-0.01
Mo/V
1.8-2.3
Cr/V
<2.
8 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.40
N
0.04-0.30
Cr
1.2-2.3
Mn
1-2
Si
0.1-0.4
Ni
<1
Co
<0.2
optionally
B
0.001-0.01
Mo/V
1.8-2.3
Cr/V
<2.
9 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.20-0.38
N
0.04-0.30
C + N
0.36-0.44
Cr
1.2-2.3
Mo
1.9-2.9
Mn
1-2
Si
0.1-0.4
Ni
<0.25
Co
<0.20
optionally
B
0.001-0.01
Mo/V
1.8-2.3
Cr/V
<2.
10 . The low-chromium hot-work tool steel tool according to claim 1 consisting of (in wt-%):
C
0.30-0.34
N
0.04-0.09
C + N
0.37-0.43
Cr
1.4-1.9
Mo
2.2-2.8
V
1.0-1.3
Mn
1-2
Si
0.2-0.4
Ni
<0.25
Co
<0.20
optionally
B
0.001-0.005
Mo/V
1.8-2.3
Cr/V
<2.
11 . The low-chromium hot-work tool steel tool according to claim 2 consisting of (in wt-%):
C
0.30-0.35
N
0.03-0.10
Cr
1.2-2.6
Mo
2.2-2.8
V
1.15-1.25
Mn
1.1-1.9
Si
0.2-0.4
Ni
<0.25
Co
<0.20
B
0.001-0.005.
12 . The low-chromium hot-work tool steel tool according to claim 3 consisting of (in wt-%):
C
0.27-0.34
N
0.04-0.10
Cr
1.4-2.3.
13 . The low-chromium hot-work tool steel tool according to claim 4 consisting of (in wt-%):
N
0.045-0.12
Cr
1.4-2.1.
14 . The low-chromium hot-work tool steel tool according to claim 5 consisting of (in wt-%):
C
0.30-0.34
N
0.045-0.12
Cr
1.5-1.7
Mo/V
1.9-2.1
Cr/V
<1.8.
15 . The low-chromium hot-work tool steel tool according to claim 2 consisting of (in wt-%):
Mo
1.9-2.9.
16 . The low-chromium hot-work tool steel tool according to claim 15 consisting of (in wt-%):
Mo
2.2-2.8.
17 . The low-chromium hot-work tool steel tool according to claim 1 consisting of:
V(C,N) particles with sizes between about 1 μm and about 10 μm.
18 . The low-chromium hot-work tool steel tool according to claim 1 consisting of:
V(C,N) particles with sizes less than 1 μm.Cited by (0)
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