Nickel alloys for exhaust system components

Patent metadata

Field	Value
Publication number	US-10544486-B2
Application number	US-201615376178-A
Country	US
Kind code	B2
Filing date	Dec 12, 2016
Priority date	Oct 12, 2016
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

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.

First claim

What is claimed is:

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.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kang Min Woo
• Cha Sung Chul
• Choe Joong Kil

Classifications

• C22C19/055 Primary

  with the maximum Cr content being at least 20% but less than 30% · CPC title

• C22C19/057 Primary

  with the maximum Cr content being less 10% · CPC title

• C22C19/056

  with the maximum Cr content being at least 10% but less than 20% · CPC title

• F01L3/02

  Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials · CPC title

• F01N2530/02

  Corrosion resistive metals · CPC title