Nickel alloys for exhaust system components
Disclosed are nickel alloys for exhaust system components having improved tensile strength, fatigue strength, oxidation resistance, and abrasion resistance at a high temperature condition. A nickel alloy for exhaust system components according to an embodiment is used for exhaust system components of a vehicle engine, the nickel alloy including: 0.01 to 0.2 wt % of C; 0.1 to 1.0 wt % of Si; 0.1 to 1.5 wt % of Mn; 8 to 24 wt % of Cr; 0.1 to 2.5 wt % of Nb; 0.1 to 4.0 wt % of Al; 0.01 to 1 wt % of Co; 0.01 to 5.0 wt % of Mo; 0.01 to 4 wt % of W; 0.1 to 1 wt % of Ta; 0.1 to 2.4 wt % of Ti; 4.0 to 11.0 wt % of Fe; a remainder being Ni; and inevitable impurities.
1. A nickel alloy for exhaust system components, wherein the nickel alloy is used for exhaust system components of a vehicle engine, the nickel alloy comprising:
0.01-0.2 wt % C;
0.1-1.0 wt % Si;
0.1-1.5 wt % Mn;
8-24 wt % Cr;
0.1-2.5 wt % Nb;
0.1-4.0 wt % Al;
0.01-1 wt % Co;
0.01-5.0 wt % Mo;
0.01-4 wt % W;
0.1-1 wt % Ta;
0.1-2.4 wt % Ti;
4.0-11.0 wt % Fe; and
a remainder comprising Ni and any impurities,
wherein the nickel alloy has an oxidation weight gain of 0.7 g/m 2 or less at a temperature higher than 20° C., and
wherein the nickel alloy has an abrasion amount of 2.0 mg or less at a temperature higher than 20° C.
2. The nickel alloy of claim 1 , wherein the nickel alloy contains a Ta—Ti based compound and a complex carbide of (Cr,Mo) 23 C 6 .
3. The nickel alloy of claim 2 , wherein the nickel alloy has a tensile strength of 950 MPa or more at a temperature higher than 20° C.
4. The nickel alloy of claim 3 , wherein the nickel alloy has a fatigue strength of 350 MPa or more at the temperature higher than 20° C.
5. The nickel alloy of claim 1 , wherein the nickel alloy has a tensile strength of 950 MPa or more at a temperature higher than 20° C.
6. The nickel alloy of claim 5 , wherein the nickel alloy has a fatigue strength of 350 MPa or more at the temperature higher than 20° C.
7. The nickel alloy of claim 1 , wherein the nickel alloy has a fatigue strength of 350 MPa or more at a temperature higher than 20° C.
8. The nickel alloy of claim 1 , wherein the nickel alloy has a tensile strength of 1050 MPa or more at 20° C., and has an elongation A5 of 13% or more at a temperature higher than 20° C.
9. The nickel alloy of claim 1 , wherein the nickel alloy has a tensile strength of 950 MPa or more at a temperature of 850° C.
10. The nickel alloy of claim 9 , wherein the nickel alloy has a fatigue strength of 350 MPa or more at the temperature of 850° C.
11. The nickel alloy of claim 1 , wherein the nickel alloy has a fatigue strength of 350 MPa or more at a temperature of 850° C.
12. The nickel alloy of claim 1 , wherein the temperature is 850° C.
13. A nickel alloy for exhaust system components, wherein the nickel alloy is used for exhaust system components of a vehicle engine, the nickel alloy consisting of:
0.01-0.2 wt % C;
0.1-1.0 wt % Si;
0.1-1.5 wt % Mn;
8-24 wt % Cr;
0.1-2.5 wt % Nb;
0.1-4.0 wt % Al;
0.01-1 wt % Co;
0.01-5.0 wt % Mo;
0.01-4 wt % W;
0.1-1 wt % Ta;
0.1-2.4 wt % Ti;
4.0-11.0 wt % Fe; and
a remainder consisting of Ni and any impurities,
wherein the nickel alloy has an oxidation weight gain of 0.7 g/m 2 or less at a temperature higher than 20° C., and
wherein the nickel alloy has an abrasion amount of 2.0 mg or less at a temperature higher than 20° C.