Chassis or drive component
The present invention relates to a, comprising a tubular element ( 10 ) with at least one heat-affected zone ( 14 ), characterized by a yield strength Rp 0.2 in the heat-affected zone ( 14 ) of at least 640 MPa and a tensile strength Rm in the heat-affected zone of at least 850 MPa and by at least the tubular element ( 10 ) consisting of a steel alloy consisting, in weight percent: C 0.12-0.22% Mn 1.5-2.5% Si 0.45-0.85% Cr <1.5% V ≥0.04% B 0.0010-0.0040% Ti 0.02-0.1% und optionally Mo ≤0.6%, balance iron and impurities resulting from smelting.
1. Chassis or drive component for a motor vehicle, comprising a tubular element ( 10 ) with at least one heat-affected zone ( 14 ), characterized by a yield strength Rp 0.2 in the heat-affected zone ( 14 ) of at least 640 MPa and a tensile strength Rm in the heat-affected zone of at least 850 MPa, wherein the tubular element ( 10 ) consists of a steel alloy consisting of, in weight percent:
C
0.12-0.22%
Mn
1.5-2.5%
Si
0.45-0.85%
Cr
maximum 1.5%
V
≥0.04%
B
0.0010-0.0040%
Ti
0.02-0.1% and
optionally Mo
≤0.6%,
balance iron and impurities resulting from smelting.
2. Chassis or drive component according to claim 1 , wherein the at least one heat-affected zone ( 14 ) has a tempered structure of tempered bainite and/or tempered martensite.
3. Chassis or drive component according to claim 1 , wherein the chassis is selected from the group consisting of a stabilizer ( 101 ) and a track rod ( 102 ).
4. Chassis or drive component according to claim 1 , wherein the chassis or drive component ( 1 ) apart from the at least one heat-affected zone ( 14 ) comprises a further length section ( 16 ), wherein the further length section ( 16 ) has a normalized or air-hardened structure, wherein the further length section ( 16 ) has a tensile strength Rm of >1,050 MPa.
5. Chassis or drive component according to claim 1 , wherein the tubular element ( 10 ) has a length, and further wherein the heat-affected zone ( 14 ) has a length which is less than 15 percent of the length of the tubular element ( 10 ) of the chassis or drive component.
6. Chassis or drive component according to claim 1 , wherein the carbon content is in the range of 0.15-0.20%.
7. Chassis or drive component according to claim 1 , wherein the chromium content is in the range of 0.5-1.5%.
8. Chassis or drive component according to claim 1 , wherein the molybdenum content is in the range of 0.1-0.2%.
9. Chassis or drive component according to claim 1 , wherein the vanadium content is in the range of 0.04-0.15%.
10. Chassis or drive component according to claim 1 , wherein the steel alloy consists, given in weight percent, of:
C
0.17-0.20%
Mn
1.7-2.2%
Si
0.5-0.7%
Cr
0.6-1.4%
V
0.05-0.10%
B
0.0010-0.0030%
Ti
0.03-0.08%
Mo
0.1-0.2%
balance iron and impurities resulting from smelting.
11. Chassis or drive component according to claim 1 , wherein the heat-affected zone is generated by subjecting at least the ends of the tubular element ( 10 ) to a temperature of 600° C. for at least 5 minutes.
12. Chassis or drive component according to claim 1 , wherein the tubular element ( 10 ) has a length, and further wherein the heat-affected zone ( 14 ) has a length which is less than 10 percent of the length of the tubular element ( 10 ) of the chassis or drive component.
13. Chassis or drive component according to claim 1 , wherein the heat-affected zone is generated by subjecting at least the ends of the tubular element ( 10 ) to a temperature of 600° C. for at least 15 minutes.
14. Chassis or drive component according to claim 1 , wherein the drive component is a drive shaft ( 100 ).