Deformed part and vehicle

Patent metadata

Field	Value
Publication number	US-10119187-B2
Application number	US-201715825994-A
Country	US
Kind code	B2
Filing date	Nov 29, 2017
Priority date	Mar 6, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

The present invention provides a deformed part created by forming a coated metal sheet into a part, the coated metal sheet comprising a steel substrate, at least one face of which is coated with a metal coating deposited by dipping the substrate in a bath, said coating comprising between 0.2 and 0.7% by weight of Al, the remainder of the metal coating being Zn and inevitable impurities, wherein an outer surface of a metal coating of the deformed part has a waviness Wa0.8 of less than or equal to 0.43 μm.

First claim

What is claimed is:

1. A deformed part created by forming a coated metal sheet into a part, the coated metal sheet comprising a steel substrate, at least one face of which is coated with a metal coating deposited by dipping the substrate in a bath, said coating comprising between 0.2 and 0.7% by weight of Al, the remainder of the metal coating being Zn and inevitable impurities, wherein an outer surface of a metal coating of the deformed part has a waviness Wa 0.8 of less than or equal to 0.43 μm.

2. The deformed part according to claim 1 , wherein the outer surface of the metal coating of the deformed part has a waviness Wa 0.8 of less than or equal to 0.41 μm.

3. The deformed part according to claim 1 , wherein the outer surface of the metal coating of the deformed part has a waviness Wa 0.8 of less than or equal to 0.37 μm.

4. The deformed part according to claim 1 , further comprising a film of paint on the metal coating of the deformed part.

5. The deformed part according to claim 4 , wherein a thickness of the film of pain is less than or equal to 120 μm.

6. The deformed part according to claim 4 , wherein a thickness of the film of paint is less than or equal to 100 μm.

7. A land motor vehicle comprising a body, the body comprising a deformed part according to claim 1 .

8. The deformed part according to claim 1 , wherein the metal coating further includes one or more additional elements selected from the following: Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Zr or Bi, a weight content of each additional element in the metal coating being less than 0.3%.

9. The deformed part according to claim 1 , wherein the metal coating consists of Zn, between 0.2 and 0.7% by weight of Al, one or more additional elements selected from the following: Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Zr or Bi, a weight content of each additional element in the metal coating being less than 0.3%, and inevitable impurities.

10. The deformed part according to claim 1 , wherein the metal coating has a weight content of Al of less than or equal to 0.6%.

11. The deformed part according to claim 1 , wherein the metal coating has a weight content of Al of less than or equal to 0.5%.

12. The deformed part according to claim 1 , wherein the coated metal sheet was not subjected to a skin-pass operation and wherein an outer surface of the metal coating of the coated metal sheet has a waviness Wa 0.8 of less than or equal to 0.35 μm.

13. A deformed part comprising:
a coated metal sheet comprising a steel substrate, at least one face of the steel substrate being coated with a metal coating, the coating comprising between 0.2 and 0.7% by weight of Al, the remainder of the metal coating being Zn and inevitable impurities, the coated metal sheet being deformed into a part,
an outer surface of a metal coating of the deformed part having a waviness Wa 0.8 of less than or equal to 0.43 μm.

Assignees

• Arcelormittal

Inventors

• Mataigne Jean-Michel
• Dauchelle Didier
• Bertrand Florence

Classifications

• C21D8/02

  during manufacturing of plates or strips (C21D8/12 takes precedence) · CPC title

• C21D8/00

  Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02) · CPC title

• C21D8/04

  to produce plates or strips for drawing, e.g. for deep-drawing · CPC title

• Y10T428/12972

  Containing 0.01-1.7% carbon [i.e., steel] · CPC title

• B32B15/013 Primary

  one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium · CPC title