Hot extrusion die tool and method of making same

Patent metadata

Field	Value
Publication number	US-2016101452-A1
Application number	US-201414890927-A
Country	US
Kind code	A1
Filing date	May 15, 2014
Priority date	May 15, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

A hot extrusion die tool and a method of making the hot extrusion die tool are provided. The hot extrusion die tool includes a die tool component including a nickel-based super alloy; and a wear resistant coating deposited on the die tooling component. The method of making the hot extrusion die tool includes coating at least one portion of an extrusion die tool component comprising a nickel-based super alloy with a wear resistant coating at a high temperature; and hardening the extrusion die tool component and the at least one coated portion.

First claim

What is claimed is:

1 . An extrusion die tool comprising:
a die tool component comprising a nickel-based super alloy; and a wear resistant coating deposited on the die tooling component.

2 . The tool of claim 1 , wherein the die tool component is selected from the group consisting of a die body, a mandrel, and a plate.

3 . The tool of claim 1 , wherein the nickel-based super alloy is selected from the group consisting of Nickel alloy 41, Nickel alloy 718, and Nickel alloy 720.

4 . The tool of claim 1 , wherein the wear resistant coating comprises at least one of aluminum or titanium.

5 . The tool of claim 1 , wherein the wear resistant coating comprises one or more layers comprising Al 2 O 3 , and one or more layers comprising TiCN.

6 . The tool of claim 1 , wherein the wear resistant coating is deposited by chemical vapor deposition (CVD) or physical vapor deposition (PVD).

7 . The tool of claim 1 , wherein the die tool component is selected from the group consisting of a mandrel and a plate; wherein the nickel-based super alloy is selected from the group consisting of Nickel alloy 41, Nickel alloy 718, and Nickel alloy 720; and wherein the wear resistant coating comprises one or more layers of Al 2 O 3 , and one or more layers of TiCN.

8 . A method of making an extrusion die tool, the method comprising the steps of:
coating at least one portion of an extrusion die tool component comprising a nickel-based super alloy with a wear resistant coating at a high temperature; and hardening the extrusion die tool component and the at least one coated portion.

9 . The method of claim 8 , wherein the extrusion die tool component is selected from the group consisting of a die body, a mandrel, and a plate.

10 . The method of claim 8 , wherein the nickel-based super alloy is selected from the group consisting of Nickel alloy 41, Nickel alloy 718, and Nickel alloy 720.

11 . The method of claim 8 , wherein the wear resistant coating comprises at least one of aluminum or titanium.

12 . The method of claim 8 , wherein the wear resistant coating is a bi-layer that comprises an inner layer comprising TiCN bonded to a surface of the extrusion die component, and an outer layer comprising Al 2 O 3 overlying the inner layer.

13 . The method of claim 8 , wherein coating at least one portion of the extrusion die tool comprises a chemical vapor deposition (CVD) process or a physical vapor deposition (PVD) process.

14 . The method of claim 8 , wherein the hardening the extrusion die tool component and the at least one coated portion comprises:
solutionizing under a first set of conditions; quenching under a second set of conditions; aging under a third set of conditions.

15 . The method of claim 14 , wherein the die tool component is selected from the group consisting of a mandrel and a plate; wherein the nickel-based super alloy is selected from the group consisting of Nickel alloy 41, Nickel alloy 718, and Nickel alloy 720; and wherein the wear resistant coating comprises one or more layers of Al 2 O 3 , and one or more layers of TiCN.

16 . The method of claim 15 , wherein the nickel-based super alloy is Nickel alloy 720; wherein the first conditions include heating the coated die tool component at about 1025° C. for about 30 minutes at about −20 inHg vacuum; wherein the second conditions include cooling the coated die tool component by applying about 40 pounds per square inch (psi) nitrogen until the coated die tool component is at about room temperature; and wherein the third set of conditions include heating the coated die tool component at about 650° C. for about 24 hours under about 6 psi nitrogen atmosphere, cooling the coated die tool component to about room temperature by applying about 6 psi nitrogen, heating the coated die tool component at about 760° C. for about 16 hours under about 6 psi nitrogen atmosphere, and cooling the coated die tool component to room temperature by applying about 6 psi nitrogen.

17 . The method of claim 15 , wherein the nickel-based super alloy is Nickel alloy 718; wherein the first the first conditions include heating the coated die tool component at about 978° C. for about 1 hour at about −20 inHg vacuum; wherein the second conditions include cooling the coated die tool component to about room temperature by applying about 6 psi nitrogen; and wherein the third set of conditions include heating the coated die tool component at about 718° C. for about 8 hours under a nitrogen atmosphere, cooling at the coated die component at about 56° C./hr to about 621° C. under about 6 psi nitrogen, maintaining the coated die tool component at about 621° C. for about 8 hours under the nitrogen atmosphere, and cooling the coated die component to room temperature under about 6 psi nitrogen.

18 . The method of claim 15 , wherein the nickel-based super alloy is Nickel alloy 41; wherein the first the first conditions include heating the coated die tool component at about 1080° C. for about 1 hour at about −20 inHg vacuum; wherein the second conditions include cooling the coated die tool component to about room temperature by applying about 6 psi nitrogen; and wherein the third set of conditions include heating the coated die tool component at about 760° C. for about 16 hours under a nitrogen atmosphere, and cooling the coated die component to room temperature under about 6 psi nitrogen.

Assignees

• Univ Ohio

Inventors

• Kraft Frank Frederick
• Rich Jared

Classifications

• C23C28/042

  including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides · CPC title

• C23C28/04

  only coatings of inorganic non-metallic material · CPC title

• B21C23/085

  Making tubes (B21C23/10 take precedence) · CPC title

• C23C28/044

  coatings specially adapted for cutting tools or wear applications · CPC title

• C21D1/06

  Surface hardening · CPC title