Flooring and device and methods associated with same

Patent metadata

Field	Value
Publication number	US-11618082-B2
Application number	US-201816955475-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Dec 18, 2017
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Ground surface comprising a substrate ( 110 ) having a Young's modulus of between 100 and 1000 GPa, and in which the ground surface has, on a working surface ( 120 ), a Vickers hardness of between 1300 and 10 000 kgf/mm 2 , and/or a surface coating forming the working surface, in which the surface coating contains amorphous carbon and/or titanium nitride and/or chromium nitride and/or tungsten carbide.

First claim

The invention claimed is:

1. A ground surface comprising:
a substrate having a Young's modulus of between 100 and 1000 GPa, the substrate having a relief having a mean texture depth,
wherein the ground surface has, on a working surface thereof, a Vickers hardness of between 1300 and 10,000 kgf/mm 2 , and
wherein the mean texture depth is between 0.3 mm and 1.7 mm.

2. The ground surface according to claim 1 further comprising a surface coating which defines the working surface.

3. The ground surface according to claim 2 , wherein the surface coating comprises amorphous carbon, titanium nitride, chromium nitride, tungsten carbide, or any combination thereof.

4. The ground surface according to claim 2 , wherein the surface coating has a thickness of between 0.1 and 100 μm.

5. The ground surface according to claim 1 , wherein the substrate has a Young's modulus of between 100 and 500 GPa, and the ground surface has, on the working surface, a Vickers hardness of between 1500 and 3500 kgf/mm 2 .

6. The ground surface according to claim 1 , wherein the substrate comprises stainless steel, tungsten carbide, ceramic, or any combination thereof.

7. The ground surface according to claim 1 , wherein a coefficient of grip between a rubber and the ground surface on the working surface is between 0.5 and 2.

8. A test device for testing a component, the test device comprising:
the ground surface according to claim 1 ; and
means for pressing the component against the ground surface or for creating relative movement between the component and the ground surface.

9. The test device according to claim 8 , wherein the test device is a rolling device.

10. The test device according to claim 8 , wherein the device is a tribotester.

11. A ground surface comprising a substrate having a Young's modulus of between 100 and 1000 GPa and a surface coating formed directly on the substrate and defining a working surface,
wherein the surface coating comprises amorphous carbon, titanium nitride, chromium nitride, tungsten carbide or any combination thereof, and
wherein a mean texture depth of a relief of the substrate on the working surface is between 0.3 and 1.7 mm.

12. A method for manufacturing a ground surface, the method comprising:
forming a relief having a mean texture depth in a surface of a substrate, the substrate having a Young's modulus of between 100 and 1000 GPa,
wherein the ground surface has, on a working surface thereof, a Vickers hardness of between 1300 and 10,000 kgf/mm 2 , and
wherein the mean texture depth is between 0.3 mm and 1.7.

13. The method according to claim 12 , wherein forming the relief comprises forming the relief on the substrate by additive manufacturing using ceramic.

14. The method according to claim 12 , wherein forming the relief comprises forming the relief by machining.

15. The method according to claim 14 , wherein forming the relief by machining comprises laser machining of a solid lump containing tungsten carbide.

16. The method according to claim 14 , wherein forming the relief by machining comprises laser machining of a solid lump containing stainless steel.

17. The method according to claim 12 , wherein forming the relief comprises forming the relief by surface laser melting using a stainless steel powder.

18. The method according to claim 12 , further comprising forming a surface coating that defines the working surface on the substrate.

19. A test method for testing a component using the test device according to claim 8 , the test method comprising:
pressing the component onto the ground surface or creating relative movement between the component and the ground surface.

Assignees

• Michelin & Cie

Inventors

• Guillou Melaine
• BREMOND Florian
• Gaucerand Andre-Clement

Classifications

• B28B1/001

  Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00) · CPC title

• C04B41/009

  characterised by the material treated · CPC title

• B22F10/66

  by mechanical means · CPC title

• Y02P10/25

  Process efficiency · CPC title

• G01N19/02

  Measuring coefficient of friction between materials {(testing of tyres G01M17/02; determinations of friction coefficient used in vehicle braking or traction control systems B60T8/172)} · CPC title