Moving blade of a turbo machine and method for producing the same

1. A moving blade of a turbo machine, comprising:

a blade root; and

a blade leaf comprising a flow leading edge, a flow trailing edge, and flow-guiding surfaces extending between the flow leading edge and the flow trailing edge;

wherein:

the blade root and a radially inner section of the blade leaf are produced from a steel material;

a radially outer section of the blade leaf is produced from a light metal alloy material that is a lighter material as compared to the steel material;

a transition region between the radially inner section of the blade leaf and the radially outer section of the blade leaf; and

a material recess formed in the transition region,

wherein the radially outer section of the blade leaf, which is produced at least in part from a light metal alloy material, is deposited on the radially inner section of the blade leaf by a generative manufacturing method.

2. The moving blade according to claim 1 , wherein the lighter material is a light metal alloy material or a ceramic material or a combination thereof.

3. The moving blade according to claim 1 , further comprising:

a transition region is formed between the radially inner section of the blade leaf and the radially outer section of the blade leaf, which is produced from a mixture of the steel material and at least the light metal alloy material.

4. The moving blade according to claim 1 , wherein in a region of the flow leading edge, the radially inner section emanating from the blade root extends up to a minimum of 10% to a maximum of at least one of 98%, 60%, and 50% of a radial height of the blade leaf.

5. The moving blade according to claim 1 , wherein in a region of the flow trailing edge, the radially inner section, emanating from the blade root, extends up to a minimum of 10% and maximum of at least one of 98%, 60%, and 50% of a radial height of the blade leaf.

6. The moving blade according to claim 1 , wherein the radially inner section of the blade leaf and the radially outer section of the blade leaf have a same size radial extensions in a region of the flow leading edge and the flow trailing edge.

7. The moving blade according to claim 1 , wherein the radially inner section of the blade leaf in a region of the flow leading edge has a smaller and thus the radially outer section of the blade leaf in the region of the flow leading edge a greater radial extension than in a region of the flow trailing edge.

8. The moving blade according to claim 1 , wherein the radially inner section of the blade leaf in the region of the flow leading edge has a greater and thus the radially outer section of the blade leaf in the region of the flow leading edge a smaller radial extension than in the region of the flow trailing edge.

9. The moving blade according to claim 1 , further comprising:

a material thickening formed in the transition region.

10. The moving blade according to claim 9 , wherein the material recess and/or the material thickening is formed at least in the region of the flow leading edge.

11. A method for producing a moving blade comprising:

producing from a steel material by at least one of milling or forging a blade root and a radially inner section of a blade leaf; and

depositing on the radially inner section of the blade leaf through a generative manufacturing method a radially outer section of the blade leaf, which is produced from a light metal alloy material,

wherein a transition region is formed between the radially inner section of the blade leaf and the radially outer section of the blade leaf; and

forming a material recess in the transition region.

12. The method according to claim 11 , wherein the generative manufacturing method is at least one of laser sintering and laser deposition welding.

13. The moving blade according to claim 9 , wherein at least one of the material recess and the material thickening extends into a region of a suction side and/or a pressure side and/or a flow trailing edge of the blade leaf.