MOTOR VEHICLE, CHASSIS COMPONENT, IN PARTICULAR FOR A CHASSIS COMPONENT AND USE OF THE CASSIS COMPONENT AND OF A MATERIAL

Abstract

The present invention relates to a motor vehicle with at least one chassis component (1). The chassis component is characterized in that the chassis component (1) has a yield strength Rp0.2 of at least 600 MPa, a tensile strength Rm of at least 850 MPa and is utilized in a delivery condition air-hardened and in that the chassis component (1) consists of an air-hardening, mainly bainitic material. Furthermore a chassis component and a material for a chassis component are described.

Claims

1. Motor vehicle with at least one chassis component, characterized in that the chassis component has a yield strength Rp0.2 of at least 600 MPa, a tensile strength Rm of at least 850 MPa and is utilized in a delivery condition air-hardened and in that the chassis component consists of an air-hardening, mainly bainitic material.

2. Chassis component for a motor vehicle, in particular a commercial vehicle, characterized in that the chassis component has a yield strength Rp0.2 of at least 600 MPa, a tensile strength Rm of at least 850 MPa and is utilized in a delivery condition air-hardened and in that the chassis component consists of an air-hardening, mainly bainitic material.

3. Chassis component according to claim 2, characterized in that the chassis component is part of a wheel suspension and/or steering system of the motor vehicle and in particular is a tie rod, a steering rod, a coupling rod, an axle guide or a different tubular part with tension-compression load.

4. Chassis component according to claim 2, characterized in that the chassis component has a structure, which consists of at least 60% bainite, with the remainder comprising at least one from the group consisting of ferrite, martensite and retained martensite.

5. Chassis component according to claim 2, characterized in that the chassis component consists of a steel material on iron basis, which comprises the following alloying elements in weight percent: TABLE-US-00006 C 0.06-0.15%  Mn 1.0-3.0% Si 0.4-2.0% Cr >0.4% and max. 2.0%.

6. Chassis component according to claim 5, characterized in that the steel material comprises at least one of the following alloying elements in weight percent: TABLE-US-00007 V max. 0.15 Ti max. 0.1 B max. 0.005 Ni max. 2.0 Mo max. 0.5 Nb max. 0.1 Al max. 0.25 N max. 0.1.

7. Chassis component according to claim 2, characterized in that the chassis component is a hot-formed and subsequently cooled at air part.

8. Use of a chassis component for a motor vehicle, in particular a commercial vehicle, characterized in that the chassis component has a yield strength Rp0.2 of at least 600 MPa, a tensile strength Rm of at least 850 MPa and is utilized in a delivery condition air-hardened and in that the chassis component consists of an air-hardening, mainly bainitic material in a motor vehicle according to claim 1.

9. Use of a material for a chassis component, in particular for a part of a wheel suspension and/or steering system of a motor vehicle, characterized in that the material is a steel material on iron basis, which comprises the following alloying elements in weight percent: TABLE-US-00008 C 0.06-0.15%  Mn 1.0-3.0% Si 0.4-2.0% Cr >0.4% and max. 2.0%.

10. Use according to claim 9, characterized in that the material comprises at least one of the following alloying elements in weight percent: TABLE-US-00009 V max. 0.15 Ti max. 0.1 B max. 0.005 Ni max. 2.0 Mo max. 0.5 Nb max. 0.1 Al max. 0.25 N max. 0.1.

11. Use according to claim 10, characterized in that the aluminum content is at least 0.05 wt. %.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In the following, the embodiment of a chassis component is described with reference to the attached FIGURE.

[0035] FIG. 1: shows a schematic depiction of the assembly of a chassis component according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0036] In FIG. 1 an embodiment of a chassis component is schematically shown, which in the depicted embodiment is a tie rod. The tie rod 1 in the depicted embodiment has a tubular element 10. The tubular element 10 preferably is a seamless tubular element 10. At both ends of the tubular element 10 a tie rod end 11 is provided, respectively. The tie rod end 11 is connected to the tubular element 10 by means of a pin 12, which is introduced into the end of the tubular element 10. The pins 12 may for example be pressed with the tubular element 10. The tie rod 1 is exposed to bending load and in addition to tension/compression loads in the middle during use.

[0037] One advantage of the invention is thus, that the customer obtains inexpensive parts and in particular tubes with the potential for light weight construction due to the considerably higher tensile strength compared to known products. In addition, due to the air-hardened delivery condition a good suitability for lacquering provided. Due to the preferably formed bainitic structure, in addition, a high durability under dynamic load is achieved.

MODIFICATIONS OF THE PREFERRED EMBODIMENTS

[0038] It should be understood that many additional changes in the details, materials, steps and arrangements of parts, which have been herein described and illustrated in order to explain the nature of the present invention, may be made by those skilled in the art while still remaining within the principles and scope of the invention.

REFERENCE NUMBERS

[0039] 1 chassis component (tie rod) [0040] 10 tubular element [0041] 11 spherical head [0042] 12 Pin