Composite profile with a carrier body of alloy material and a profile strip and a method for production of the composite profile

1. A composite profile comprising:

(1) an extruded metal alloy carrier profile comprising a rail head having a longitudinal axis B, the rail head comprises a surface and two longitudinal edges extending parallel to the longitudinal axis B and (2) a metal channel shaped profile strip comprising a base portion spanning the surface of the rail head and parallel side legs which lie on the longitudinal edges of the head rail, an insert rod is provided on each of the parallel side legs which lie on the longitudinal edges of the head rail and engage in lateral slots provided in the two longitudinal edges of the rail head, wherein a top surface of the carrier profile is curved semicircular in cross-section and its zenith is arranged at a cross-sectional longitudinal axis (Q) opposite a flat under face of the profile strip such that in an assembled arrangement of the profile strip and the carrier profile with a weld scan, a mechanical pretension is generated, and wherein, the insert rod is of approximately V-shaped cross-section that comprises one channel leg overlapping a significant portion of a vertical inside face of the side leg of the profile strip approximately axially parallel and another channel leg which is directed towards the longitudinal axis (B) of the rail head is mounted in the slot tilted at an angle (w) to the cross-sectional longitudinal axis (Q) of the carrier profile.

2. A composite profile comprising:

(1) an extruded metal alloy carrier profile comprising a rail head having a longitudinal axis B, the rail head comprises a surface and two longitudinal edges extending parallel to the longitudinal axis B and (2) a metal channel shaped profile strip comprising a base portion spanning the surface of the rail head and parallel side legs which lie on the longitudinal edges of the head rail, an insert rod is provided on each of the parallel side legs which lie on the longitudinal edges of the head rail and engage in lateral slots provided in the two longitudinal edges of the rail head, wherein a surface of the carrier profile is flat and an under face of the profile strip is convexly curved towards the carrier profile and symmetrical to a cross-sectional longitudinal axis (Q) such that in an assembled arrangement of the profile strip and the carrier profile with a weld scan, a mechanical pretension is generated, and wherein, the insert rod is of approximately V-shaped cross-section that comprises one channel leg overlapping a significant portion of a vertical inside face of the side leg of the profile strip approximately axially parallel and another channel leg which is directed towards the longitudinal axis (B) of the rail head is mounted in the slot tilted at an angle (w) to the cross-sectional longitudinal axis (Q) of the carrier profile.

3. A composite profile according to claim 1 or 2 , wherein the metal of the profile strip is made of steel and is harder than the metal alloy of the carrier profile.

4. A composite profile according to claim 3 , wherein the insert rod is formed from the material of the profile strip.

5. A composite profile according to claim 1 or 2 , wherein the lateral slots are tilted towards the rail head and the cross-sectional longitudinal axis (Q) of the carrier profile.

6. A composite profile according to claim 5 , wherein the slot comprises a V-shaped cross-section in the rail head of the carrier profile, wherein one of the slot legs is a longitudinal recess in the longitudinal edge of the rail head.

7. A composite profile according to claim 6 , wherein the longitudinal recess ends at a radial cross-sectional step.

8. A composite profile according to claim 6 , wherein the angle (w) 60° to 70°.

9. A composite profile according to claim 1 or 2 , wherein the insert rod is of linear cross-section which lies on the inside of the profile strip side leg and protrudes beyond its face, where at one end it is welded to the face of a profile side leg and is tilted in relation to a cross-section longitudinal axis (Q) of the composite profile at an angle (w) of around 60° to 80°.

10. A method for production of the composite profile according to claim 1 or 2 , including providing the carrier profile with the head surface and the side slots accompanying on both sides, and inserting in each side slot the insert rod and on a section of the insert rod protruding from the slot lies the profile strip or cover profile encompassing the head surface so that the cover profile has a pretension in relation to the carrier profile.

11. A method according to claim 1 or 2 , wherein the insert rod is fixedly rolled or pressed onto the carrier profile with pretension.

12. A method according to claim 1 or 2 , wherein the profile strip is pressed onto the carrier profile with pretension.

13. A method according to claim 1 or 2 , wherein the insert rod is through welded with the profile strip.