Method for producing a brake disc and brake disc

Patent metadata

Field	Value
Publication number	US-2016348744-A1
Application number	US-201415116742-A
Country	US
Kind code	A1
Filing date	Jan 29, 2014
Priority date	Feb 5, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

The invention relates to a method for producing a brake disc ( 1 ) for a vehicle, in which a protective layer is arranged on a base member ( 2 ) of the brake disc ( 1 ). The base member is formed of aluminum or of an aluminum alloy.
It is proposed that the method comprise at least the steps:
pre-machining at least the friction surfaces ( 7, 8 ) of the base member ( 2 ) in blank form; applying an enamel coating ( 10 ) as an anti-corrosion and/or anti-wear layer at least onto the friction surfaces ( 7, 8 ) of the brake disc ( 1 ), and post-treating the base member ( 2 ) coated at least in places, wherein the enamel coating ( 10 ) bonds metallurgically to the base material of the base member ( 2 ).

First claim

What is claimed:

1 . A method for producing an aluminum or aluminum alloy brake disc having an anti-corrosion and anti-wear enamel coating on at least one friction
comprising:
pre-machining the friction surfaces ( 7 , 8 );
applying the enamel coating ( 10 ) onto the friction surfaces ( 7 , 8 ); and
post-treating the brake disc at least in places, wherein the enamel coating ( 10 ) bonds metallurgically to the brake disc.

2 . The method of claim 1 , wherein
the enamel coating ( 10 ) is a melt mixture which comprises glass-forming oxides together with borax, feldspar, quartz, fluoride, soda, sodium nitrate and opacifiers.

3 . The method of claim 2 , wherein
the enamel coating ( 10 ) comprises oxides of cobalt, manganese and nickel.

4 . The method of claim 2 , wherein
the enamel coating ( 10 ) has a hardness which is a multiple of that of the aluminum or of an aluminum alloy brake disc.

5 . The method of claim 1 , wherein
the pre-machining step is carried out by means of a turning method.

6 . The method of claim 5 , wherein
the pre-machining step creates for a surface to have a roughness Rz of 5 to 15 μm.

7 . The method of claim 1 , wherein
the enamel coating ( 10 ) is applied by spraying.

8 . The method of claim 1 , wherein
the enamel coating ( 10 ) is applied in a dip bath.

9 . The method of claim 1 , wherein
the applied enamel coating ( 10 ) is dried, wherein the brake disc ( 1 ) is subsequently subjected to a baking treatment.

10 . The method of claim 1 , wherein
the applied enamel coating ( 10 ) is subjected to mechanical post-machining.

11 . A brake disc for a vehicle comprising; aluminum containing friction surfaces ( 7 , 8 ), having a protective enamel coating resistant to wear and corrosion.

12 . The brake disc of claim 11 , wherein
the enamel coating ( 10 ) is arranged completely on an aluminum base member ( 2 ).

13 . The brake disc of claim 11 , wherein
the enamel coating ( 10 ) has a thickness of between 50 and 1000 μm.

14 . The brake disc of claim 13 , wherein
edges of the base member ( 2 ) have a radius R which is at least three times greater than the layer thickness of the enamel coating ( 10 ) in the region of the edge radius.

15 . A brake disc made by the following process:
pre-maching friction surfaces of the brake disc; applying an enamel coating to the pre-machined friction surfaces; and post-treating the brake disc to metallurgically bond the enamel to the pre-machined friction surfaces.

16 . An enamel coating for an aluminum brake disc comprising:
SiO 2 5-50%; BaO 2-20%; B 2 O 3 0.5-10%; Li 2 O 0.5-15%; K 2 O 5-30%; Na 2 O 5-44%; Sb 2 O 3 0.5-25%; and TiO 2 2-40%.

Assignees

• Ford Global Tech Llc

Inventors

• Broda Maik
• Verpoort Clemens M
• Bruggen Ivan Jan Mathieu Ernest
• Grabiec Tomasz P
• Bretschneider Annett
• Kuehn Wolfgang

Classifications

• F16D2200/003

  Light metals, e.g. aluminium · CPC title

• C09D5/084

  Inorganic compounds · CPC title

• C03C2207/08

  for light metals · CPC title

• C03C4/20

  for chemical resistant glass · CPC title

• F16D2250/0046

  Coating · CPC title