SI8311830A8 - Method of manufacturing crossing element, especially end of crossing elements for rails - Google Patents

Description

VOEST-ALPINE Aktiengesellschaft

The process for making the intersection element, in particular the tips of the intersection element

FIELD OF THE INVENTION

The invention relates to a process for the manufacture of an intersection element, in particular the tips of an intersection element made of steel for intersections or track switches.

A technical problem

Crossing elements are subjected to high loads and high wear when rolling the wheels of a rail vehicle, especially if the wheels are rolled from the wing rail to the tip of the intersection or. from the tip of the intersection element to the wing rail co. The load on the tip of the crossover element is particularly high when passing the wheel from the wing rail to the tip, and does not increase proportionally with larger axle loads and especially with increased driving speeds, except that major deformations can occur at the tip, which significantly reduce the service life of the crossover elements.

The state of the art

In order to avoid the impact of the wheel on the tip of the crossover element, the crossover elements with movable wing rails and / or blades are known. with movable tips. By pinching the tip of the intersection element on the wing rail or. by placing the wing rail on the tip of the intersection, a continuous running surface is created. Such intersections, however, require special gearing and are suitably wrapped and expensive.

Terminals are known to incorporate intersecting elements with particular material properties. Known materials with particularly good wear properties and high load capacity in the rolling range of the wheel are manganese hard steels as well as highly improved ^ low alloy steels. These steels, however, must be detached with the connected parts of the intersection element or. the rails are well welded to make them usable in a modern upper machine with welded rails without gaps. Welding of Manganese hard steel, as well as low alloy improved tips of the junction element with rail materials, requires special measures, which are also very demanding, because of their limited suitability for welding these steels. It is also known to use compound wheels in the rolling range

- 3 materials, where the wear-solid part is applied by non-precision welding in the wheel rolling range.

In all these embodiments of the intersection, either the same material or different materials of not very different strength are used in the rolling region of the wheel, that is, on the wing rail and at the tip of the intersection. Surprisingly, when using a high-strength and thus wear-resistant material for the tip, it is sufficient to leave the wing rail even in the rolling range of the wheel in the normal version (in V8 condition).

Description of solution to a technical problem

According to the invention, however, it is proposed that the tip of the intersection 8 element or. The wheel tread on the cross member is made of hardening steel of the following composition:

C 0.01 to 0.05% Al 0 to 0.2% Si 0.01 to 0.2% B 0 to 0.1% Mn 0.01 to 0.2% Zr 0 to 0.1% Co 0 to 15% Mo 1.5 to 6% It is not 7 to 20% You 0.1 to 1% Cr 0 to 15% When using this steels can the entire tip of the intersection ele- you're a mint estoji from of this kind of steel, giving the tip of

work by cutting or cutting off one piece of this kind of steel. In this way it is possible to make intersections

- 4 load-bearing elements in an economical way. The type of steel used for the tips of the intersection elements of the invention has hitherto not been found in the upper machine and belongs to the group of martensitic hardening steels. The steel is well weldable and in the annealing condition in the solution well machinable. Such types of steel are distinguished by the fact that, when held at 200 to 600 ° C, they receive a very high hardness at good toughness, which is achieved by martensitic conversion and / or elimination of interfacial phases. The attainable strength lies at about 1800 to 2200 N / mm ^.

In a preferred manner, the intersection element or. the tip of the intersection element according to the invention is made by the fact that the tread for the bicycle is made by applying welding to the base body of standard steel rails. This can be a welding of about 15 mm in thickness.

-5Best Way to Economically Utilize Invention

To make the tip of the intersection element or tread for a bicycle on the intersection element, we use hardening steel with the following composition:

C 0.01 to 0.05%, Si 0.01 to 0.2%, Mn 0.01 to 0.2%,

Co 0 to 15%, Mo 1.5 to 6%, Ni 7 to 20%, Ti 0.1 to 1%, Cr 0 to 13%, Al 0 to 0.2%, B 0 to 0.1%, Zr 0 to 0.1%.

This steel, which belongs to the group of hardening martensitic steels, was applied on a base body of standard steel for rails. The thickness of the coating is about 15 mm. Subsequently, the relaxation is carried out at 200 to 600 ° C to achieve a strength of 1800 to 2200 N / mm ² .

For

VOEST-ALPINE Aktiengesellschaft:

PATENT APPLICATION

A method for making a cross member, in particular the tip of a cross member, of steel for intersections or track switches, characterized in that a treadmill is applied to the base body by means of welding hardening steel with the composition:

C 0.01 to 0.05 % Al 0 to 0.2 % Si 0.01 to 0.2 % B 0 to 0.1 % Mn 0.01 to 0.2 % Zr 0 to 0.1 %, Co 0 to 15 % Mo to 6 % It is not 7 to 20 % You 0.1 to 1 % Cr 0 to 13 %

in a thickness of about 15 mm, and then loosening optimally at 200 ° to 600 ° C.

For

VOEST-ALPINE Aktiengesellschaft

18747-ΙΧ-85 / ΚΑ

Claims (1)

SUMMARY A process for the manufacture of a cross member, in particular the tip of a cross member, of steel for intersections or rail switches, whereby a tread is applied to the base body for a bicycle by applying welding hardening steel with the following composition: C 0.04 to 0.05 % Al 0 to 0.2 % Si 0.04 to 0.2 % B 0 to 0.1 % Mn 0.04 to 0.2 % Zr 0 to 0.1 %. Co 0 to 15 % Mo 1.5 to 6 % It is not 7 to 20 % You 0.4 to 4 % Cr 0 to 13 % approx.