US2024327941A1PendingUtilityA1
Alloy, raw workpiece, component consisting of austenite, and method for heat-treating an austenite
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO KGPriority: Oct 28, 2020Filed: Sep 1, 2021Published: Oct 3, 2024
Est. expiryOct 28, 2040(~14.3 yrs left)· nominal 20-yr term from priority
C21D 8/00C22C 38/60C22C 38/58C22C 38/54C22C 38/50C22C 38/48C22C 38/46C22C 38/44C22C 38/06C22C 38/04C22C 38/02C22C 38/008C22C 38/002C22C 38/001C21D 2211/001C21D 6/008C21D 6/005C21D 1/26C21D 9/40C21D 9/0068C21D 6/02C21D 6/004C22C 30/00
51
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
An alloy, a raw workpiece, a component and a method contain or create austenites. The new alloy allows austenites to be formed or treated at higher temperatures, with new heat treatments also being used. Various heat treatments may be carried out with reference to the strength/toughness balance and notch sensitivity.
Claims
exact text as granted — not AI-modified1 - 17 . (canceled)
18 . An alloy, comprising:
carbon (C)
0.02%-0.08% in % by weight;
silicon (Si)
0.20%-0.40% in % by weight;
manganese (Mn)
1.60%-2.00% in % by weight;
chromium (Cr)
13.5%-16.0% in % by weight;
molybdenum (Mo)
2.00%-2.50% in % by weight;
nickel (Ni)
24.0%-27.0% in % by weight;
vanadium (V)
0.25%-0.35% in % by weight;
aluminum (Al)
0.40%-0.60% in % by weight;
titanium (Ti)
2.00%-2.50% in % by weight;
niobium (Nb)
1.00%-1.20% in % by weight;
tungsten (W)
1.80%-2.20% in % by weight;
boron (B)
0.004%-0.006% in % by weight; and
balance iron and unavoidable impurities.
19 . The alloy according to claim 18 , wherein the carbon (C) is 0.02% by % weight.
20 . The alloy according to claim 18 , wherein the carbon (C) is 0.03%-0.08% by % weight.
21 . The alloy according to claim 18 , wherein the titanium (Ti) is 2.5% by % weight.
22 . The alloy according to claim 18 , wherein the titanium is 2.0%-2.3% by % weight of titanium.
23 . The alloy according to claim 18 , further comprising at least one of (in % by weight):
arsenic (As) to 0.008%; tin (Sn) to 0.008%; antimony (Sb) to 0.002%; nitrogen (N) to 0.005%; phosphorus (P) to 0.025%; or sulfur (S) to 0.015%.
24 . The alloy according to claim 18 , the alloy consisting of:
said carbon (C)
0.02%-0.08% in % by weight;
said silicon (Si)
0.20%-0.40% in % by weight;
said manganese (Mn)
1.60%-2.00% in % by weight;
said chromium (Cr)
13.5%-16.0% in % by weight;
said molybdenum (Mo)
2.00%-2.50% in % by weight;
said nickel (Ni)
24.0%-27.0% in % by weight;
said vanadium (V)
0.25%-0.35% in % by weight;
said aluminum (Al)
0.40%-0.60% in % by weight;
said titanium (Ti)
2.00%-2.50% in % by weight;
said niobium (Nb)
1.00%-1.20% in % by weight;
said tungsten (W)
1.80%-2.20% in % by weight;
said boron (B)
0.004%-0.006% in % by weight; and
balance said iron and said unavoidable
impurities.
25 . A blank, comprising:
an iron-based alloy, containing (in % by weight):
carbon (C)
0.02%-0.08%;
silicon (Si)
0.20%-0.40%
manganese (Mn)
1.60%-2.00%;
chromium (Cr)
13.5%-16.0%;
molybdenum (Mo)
2.00%-2.50%;
nickel (Ni)
24.0%-27.0%;
vanadium (V)
0.25%-0.35%;
aluminum (Al)
0.40%-0.60%;
titanium (Ti)
2.00%-2.50%;
niobium (Nb)
1.00%-1.20%;
tungsten (W)
1.80%-2.20%;
boron (B)
0.004%-0.006%; and
unavoidable impurities.
26 . The blank according to claim 25 , wherein the carbon (c) is 0.02% by % weight.
27 . The blank according to claim 25 , wherein the carbon (C) is 0.03%-0.08% by % weight.
28 . The blank according to claim 25 , wherein the titanium (Ti) is 2.5% by % weight.
29 . The blank according to claim 25 , wherein the of titanium (Ti) is 2.0%-2.3% by % weight.
30 . The blank according to claim 25 , further comprising at least one of (in % by weight):
arsenic (As) to 0.008%; tin (Sn) to 0.008%; antimony (Sb) to 0.002%; nitrogen (N) to 0.005%; phosphorus (P) to 0.025%; or sulfur (S) to 0.015%.
31 . A component, comprising:
an iron-based alloy, containing (in % by weight):
carbon (C)
0.02%-0.08%;
silicon (Si)
0.20%-0.40%;
manganese (Mn)
1.60%-2.00%;
chromium (Cr)
13.5%-16.0%;
molybdenum (Mo)
2.00%-2.50%;
nickel (Ni)
24.0%-27.0%;
vanadium (V)
0.25%-0.35%;
aluminum (Al)
0.40%-0.60%;
titanium (Ti)
2.00%-2.50%;
niobium (Nb)
1.00%-1.20%;
tungsten (W)
1.80%-2.20%;
boron (B)
0.004%-0.006%; and unavoidable impurities,
32 . The component according to claim 31 , wherein the carbon (C) is 0.02% by % weight.
33 . The component according to claim 31 , wherein the carbon (C) is 0.03%-0.08% by % weight.
34 . The component according to claim 31 , wherein the titanium (Ti) is 2.5% by % weight.
35 . The component according to claim 31 , wherein the titanium (Ti) is 2.0%-2.3% by % weight.
36 . The component according to claim 31 , wherein:
the component is selected from the group consisting of a rotor disk, turbine blade, turbine ring, a gas turbine part, a steam turbine blade and a forged steam-turbine part; and wherein the component is subjected to a heat treatment step where:
a solution annealing at at least 1253K is performed;
a first aging at at least 993K is performed; and
a second aging at at least 953K is performed.
37 . The component according to claim 31 , further comprising at least one of (in % by weight):
arsenic (As) to 0.008%; tin (Sn) to 0.008%; antimony (Sb) to 0.002%; nitrogen (N) to 0.005%; phosphorus (P) to 0.025%; or sulfur (S) to 0.015%.
38 . A method for a heat treatment of an austenite, the method comprises the steps of:
performing a solution annealing at at least 1253K; performing a first aging at at least 993K; and performing a second aging at at least 953K.
39 . The method according to claim 38 , which further comprises performing a third aging.
40 . The method according to claim 38 , which further comprises:
performing the first aging at at least 1033K; and performing the second aging at at least 993K.
41 . The method according to claim 38 , which further comprises:
performing the solution annealing at 1293K; performing the first aging at at least 1033K; and performing the second aging at at least 923K.
42 . The method according to claim 38 , which further comprises:
performing the solution annealing at at least 1253K; performing the first aging at at least 993K; performing the second aging at at least 1033K; and performing a third aging at at least 953K.
43 . The method according to claim 38 , which further comprises:
performing the solution annealing at at least 1253K; performing the first aging at at least 1033K; performing the second aging at at least 993K; and performing a third aging at at least 953K.
44 . The method according to claim 38 , which further comprises:
performing the second aging at a temperature at least 30 k below a temperature of the first aging; and performing a third aging at a temperature at least 30 k below a temperature of the second aging.
45 . The method according to claim 38 , wherein the method is performed with the steps consisting of:
performing the solution annealing at at least 1253K; performing the first aging at at least 993K; and performing the second aging at at least 953K.
46 . The method according to claim 38 , wherein the method is performed with the steps consisting of:
performing the solution annealing at at least 1253K; performing the first aging at at least 1033K; and performing the second aging at at least 993K.
47 . The method according to claim 38 , wherein the method is performed with the steps consisting of:
performing the solution annealing at 1293K; performing the first aging at at least 1033K; and performing the second aging at at least 923K.
48 . The method according to claim 38 , wherein the method is performed with the steps consisting of:
performing the solution annealing at at least 1253K; performing the first aging at at least 993K; performing the second aging at at least 1033K; and performing a third aging at at least 953K.
49 . The method according to claim 38 , wherein the method is performed with the steps consisting of:
performing the solution annealing at at least 1253K; performing the first aging at at least 1033K; performing the second aging at at least 993K; and performing a third aging at at least 953K.Join the waitlist — get patent alerts
Track US2024327941A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.