Cylinder liner and method for producing same

Patent metadata

Field	Value
Publication number	US-10017845-B2
Application number	US-201314419430-A
Country	US
Kind code	B2
Filing date	Apr 29, 2013
Priority date	Aug 3, 2012
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The invention relates to a method for producing a thermally sprayed, thin-walled cylinder liner for insertion into a cylinder crankcase and to a cylinder liner produced with said method.

First claim

The invention claimed is:

1. A method for producing a cylinder liner for thermally inserting into a cylinder crankcase, comprising:
thermal spraying of a first material onto an outer face of a rotating mold body which is formed of metal and has a substantially cylindrical shape to form a wear- and corrosion-resistant first layer, the first sprayed material comprising:
at least 80% iron, Fe;
no more than 2% carbon, C;
between 0 and no more than 20% chromium, Cr;
between 0 and no more than 1% nickel, Ni; and

thermal spraying of a second material to form a second, outer layer on the first, inner layer, the second sprayed material comprising:
aluminium, an aluminium alloy or a multi-element material consisting of an aluminium alloy and iron; and

removal of the mold body.

2. The method according to claim 1 , further comprising:
processing of the outer layer by grinding or fine or ultra-fine turning.

3. The method according to claim 1 , wherein the maximum roughness depth of an outer lateral surface of the cylinder liner is 50 μm.

4. The method according to claim 1 , wherein each layer has a layer thickness of 0.05 to 2.0 mm.

5. The method according to claim 1 , wherein the cylinder liner formed has a maximum total wall thickness of 4.0 mm.

6. The method according to claim 1 , further comprising:
providing the cylinder liner with opposite axial ends and formed with a bevel on an outer rim at one or both axial ends of the cylinder liner.

7. The method according to claim 1 , further comprising:
providing the cylinder liner with opposite axial ends and formed with a bevel on an inner rim at one or both axial ends of the cylinder liner.

8. The method according to claim 1 , further comprising:
providing cut-outs on the liner underside and/or overflow channels by milling or thermal laser-cutting.

9. The method according to claim 1 , further comprising:
honing of the inside of the cylinder liner formed.

10. The method of claim 1 , wherein the maximum roughness depth of an outer lateral surface of the cylinder liner is 10 μm.

11. The method of claim 1 , wherein the cylinder liner formed has a maximum total wall thickness of 0.7 to 2.0 mm.

12. The method of claim 1 , further comprising:
inserting the cylinder liner in a cylinder crankcase.

Assignees

• Fed Mogul Burscheid Gmbh

Inventors

• Goedel Peter
• Scherer Volker
• Buchmann Michael

Classifications

• F02F1/00

  Cylinders; Cylinder heads · CPC title

• B22D19/16

  for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills (casting compound ingots B22D7/02) · CPC title

• C23C30/00

  Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title

• C23C4/067

  containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic · CPC title

• C23C4/08

  containing only metal elements (C23C4/073 takes precedence) · CPC title