Method for producing a rotor wheel and a rotor

Patent metadata

Field	Value
Publication number	US-9995154-B2
Application number	US-201414576182-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 19, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A method for producing a component, in particular a rotor wheel, includes positioning a main body, a fusion-weldable attachment layer, and a barrier layer. The main body has a first alloy in an attachment region. The fusion-weldable attachment layer is positioned in the attachment region of the main body and has a second alloy which differs from the first alloy. The barrier layer is positioned between the main body and the fusion-weldable attachment layer. The barrier layer is configured to prevent a reaction of the first alloy of the main body with the second alloy of the fusion-weldable attachment layer during a thermal treatment. The method further includes heating the main body, the barrier layer, and the fusion-weldable attachment layer to connect the main body, the barrier layer, and the fusion-weldable attachment layer to one another.

First claim

What is claimed is:

1. A method for producing a component, comprising:
positioning a main body including a first alloy disposed at least in an attachment region of the main body;
positioning a fusion-weldable attachment layer in the attachment region of the main body, the fusion-weldable attachment layer including a second alloy that differs from the first alloy;
positioning a barrier layer between the main body and the fusion-weldable attachment layer, the barrier layer configured to prevent a reaction of the first alloy of the main body with the second alloy of the fusion-weldable attachment layer during a thermal treatment; and
heating the main body, the barrier layer, and the fusion-weldable attachment layer to connect the main body, the barrier layer, and the fusion-weldable attachment layer to one another, wherein the first alloy is a titanium-aluminum base alloy and the second alloy is a vanadium base alloy.

2. The method according to claim 1 , wherein the barrier layer is further configured to prevent diffusion of the atoms of the first alloy of the main body to the atoms of the second alloy of the fusion-weldable attachment layer during the heating.

3. The method according to claim 2 , wherein the barrier layer is further configured to prevent diffusion of the atoms of the second alloy of the fusion-weldable attachment layer to the atoms of the first alloy of the main body during the heating.

4. The method according to claim 1 , wherein the barrier layer comprises an oxidic ceramic.

5. The method according to claim 4 , wherein the oxidic ceramic of the barrier layer is in the form of zirconium dioxide with the general chemical formula ZrO 2−δ , where δ is in the range of greater than or equal to 0 to less than or equal to 0.5, and/or comprises yttrium oxide or magnesium oxide in the range of greater than or equal to 0 to less than or equal to 10% by mass.

6. The method according to claim 1 , wherein the second alloy comprises nickel.

7. The method according to claim 1 , wherein one or more of:
the second alloy comprises zirconium and/or titanium, and
an intermediate layer is positioned between the barrier layer and the fusion-weldable attachment layer, the intermediate layer including zirconium and/or titanium and, during the step of heating, the intermediate layer is connected to the fusion-weldable attachment layer and the barrier layer.

8. The method according to claim 7 , wherein:
before the step of heating,
the main body is a green body, and
the barrier layer, the fusion-weldable attachment layer and the intermediate layer are applied to the green body by one or more of injection molding and a printing method; and
in the step of heating, the green body, the barrier layer, the fusion-weldable attachment layer and the intermediate layer are co-sintered.

9. The method according to claim 7 , wherein, before the step of heating,
the main body is present in a sintered state; and
the barrier layer, the fusion-weldable attachment layer and the intermediate layer are applied to the main body by a thermal spraying method.

10. The method according to claim 1 , wherein, before the step of heating,
the main body and the barrier layer are present in a sintered state; and
the fusion-weldable attachment layer is present in a sintered state or in a state produced by melt metallurgy.

11. The method according to claim 1 , wherein the component is configured as a rotor wheel.

12. A method for producing a component, comprising:
positioning a main body including a first alloy disposed at least in an attachment region of the main body;
positioning a fusion-weldable attachment layer in the attachment region of the main body, the fusion-weldable attachment layer including a second alloy that differs from the first alloy;
positioning a barrier layer between the main body and the fusion-weldable attachment layer, the barrier layer configured to prevent a reaction of the first alloy of the main body with the second alloy of the fusion-weldable attachment layer during a thermal treatment; and
heating the main body, the barrier layer, and the fusion-weldable attachment layer to connect the main body, the barrier layer, and the fusion-weldable attachment layer to one another,
wherein
before the step of heating,
the main body is a green body, and
the barrier layer, the fusion-weldable attachment layer and the intermediate layer are applied to the green body by one or more of injection molding and a printing method, and
in the step of heating, the green body, the barrier layer, the fusion-weldable attachment layer and the intermediate layer are co-sintered, and

wherein one or more of:
the second alloy comprises zirconium and/or titanium, and
an intermediate layer is positioned between the barrier layer and the fusion-weldable attachment layer, the intermediate layer including zirconium and/or titanium and, during the step of heating, the intermediate layer is connected to the fusion-weldable attachment layer and the barrier layer.

13. The method according to claim 12 , wherein the first alloy is a titanium-aluminum base alloy.

14. The method according to claim 12 , wherein the second alloy is a vanadium base alloy.

15. The method according to claim 12 , wherein the barrier layer is further configured to prevent diffusion of the atoms of the first alloy of the main body to the atoms of the second alloy of the fusion-weldable attachment layer during the heating.

16. The method according to claim 15 , wherein the barrier layer is further configured to prevent diffusion of the atoms of the second alloy of the fusion-weldable attachment layer to the atoms of the first alloy of the main body during the heating.

17. The method according to claim 12 , wherein the barrier layer comprises an oxidic ceramic.

18. The method according to claim 17 , wherein the oxidic ceramic of the barrier layer is in the form of zirconium dioxide with the general chemical formula ZrO 2−δ , where δ is in the range of greater than or equal to 0 to less than or equal to 0.5, and/or comprises yttrium oxide or magnesium oxide in the range of greater than or equal to 0 to less than or equal to 10% by mass.

19. A method for producing a component, comprising:
positioning a main body including a first alloy disposed at least in an attachment region of the main body;
positioning a fusion-weldable attachment layer in the attachment region of the main body, the fusion-weldable attachment layer including a second alloy that differs from the first alloy;
positioning a barrier layer between the main body and the fusion-weldable attachment layer, the barrier layer configured to prevent a reaction of the first alloy of the main body with the second alloy of the fusion-weldable attachment layer during a thermal treatment; and
heating the main body, the barrier layer, and the fusion-weldable attachment layer to connect the main body, the barrier layer, and the fusion-weldable attachment layer to one another, wherein
the barrier layer comprises an oxidic ceramic in the form of zirconium dioxide with the general chemical formula ZrO 2−δ , where δ is in the range of greater than or equal to 0 to less than or equal to 0.5, and/or comprises yttrium oxide or magnesium oxide in the range of greater than or equal to 0 to less than or equal to 10% by mass.

20. The method according to claim 1 , wherein:
the second alloy comprises zirconium and/or titanium, and
an intermediate layer is positioned between the barrier layer and the fusion-weldable atta

Assignees

• Bosch Gmbh Robert

Inventors

• Burghardt Andreas
• Reinsch Bernd

Classifications

• F05D2230/239

  Inertia or friction welding · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F05D2300/2118

  Zirconium oxides · CPC title

• F05D2300/174

  Titanium alloys, e.g. TiAl · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title