Piston for an Internal Combustion Engine, Method for Producing Said Piston and Use of a Copper Alloy in the Production of a Piston
The invention relates to a piston for an internal combustion engine, which consists of a copper alloy. According to the method for producing such a piston, said piston is produced from a copper alloy. According to the invention, a copper alloy is used in the production of a piston for an internal combustion engine.
1 . Piston for an internal combustion engine, said piston consisting of a copper alloy.
2 . Piston according to claim 1 , characterised in that the copper alloy contains nickel and/or silicon.
3 . Piston according to claim 2 , characterised in that the copper alloy contains nickel in an amount of 1% to 7% and/or silicon in an amount of 0.2% to 5%, preferably 2.5% to 7% nickel and/or more than 1.5% to 5% silicon, further preferred more than 4%, and even more preferred more than 5%, to 7% nickel and/or more than 2% to 5% silicon.
4 . Piston according to claim 1 , characterised in that the copper alloy furthermore contains at least one of the following elements in the respectively specified amount: up to 5% aluminium, up to 4% tin, up to 30% zinc, up to 5% iron, up to 5% manganese, up to 1% cobalt, up to 2% chromium.
5 . Piston according to claim 1 , characterised in that said piston is at least partly coated.
6 . Piston according to claim 5 , characterised in that said piston is coated with nickel, aluminium and/or iron, preferably alloyed with chromium.
7 . Piston according to claim 1 , characterised in that said piston does not comprise a cooling duct.
8 . Method for the production of a piston for an internal combustion engine, in which said piston is produced from a copper alloy.
9 . Method according to claim 8 , characterised in that the copper alloy contains nickel and/or silicon.
10 . Method according to claim 9 , characterised in that the copper alloy contains nickel in an amount of 1% to 7% and/or silicon in an amount of 0.2% to 5%, preferably 2.5% to 7% nickel and/or more than 1.5% to 5% silicon, further preferred more than 4%, and even more preferred more than 5%, to 7% nickel and/or more than 2% to 5% silicon.
11 . Method according to claim 8 , characterised in that the copper alloy furthermore contains at least one of the following elements in the respectively specified amount: up to 5% aluminium, up to 4% tin, up to 30% zinc, up to 5% iron, up to 5% manganese, up to 1% cobalt, up to 2% chromium.
12 . Method according to claim 8 , characterised in that the alloy is first of all cast.
13 . Method according to claim 12 , characterised in that the alloy is cast by means of a continuous casting method, preferably with subsequent water cooling.
14 . Method according to claim 8 , characterised in that extrusion moulding occurs as part of the method.
15 . Method according to claim 8 , characterised in that as part of the method, the copper alloy is subjected to solution heat treatment and then rapidly cooled.
16 . Method according to claim 8 , characterised in that the piston is formed by extrusion.
17 . Method according to claim 8 , characterised in that the piston is formed by forging.
18 . Method according to claim 8 , characterised in that as part of the method, a piston blank is hardened preferably in an inert gas atmosphere.
19 . Method according to claim 8 , characterised in that the piston is at least partly coated.
20 . Method according to claim 8 , characterised in that the piston is coated with nickel and/or aluminium and/or iron, preferably alloyed with chromium.
21 . Use of a copper alloy for the production of a piston for an internal combustion engine.
22 . Use according to claim 21 , characterised in that the copper alloy contains nickel and/or silicon.
23 . Use according to claim 22 , characterised in that the copper alloy contains nickel in an amount of 1% to 7% and/or silicon in an amount of 0.2% to 5%, preferably 2.5% to 7% nickel and/or more than 1.5% to 5% silicon, further preferred more than 4%, and even more preferred more than 5%, to 7% nickel and/or more than 2% to 5% silicon.
24 . Use according to claim 21 , characterised in that the copper alloy furthermore contains at least one of the following elements in the respectively specified amount: up to 5% aluminium, up to 4% tin, up to 30% zinc, up to 5% iron, up to 5% manganese, up to 1% cobalt, up to 2% chromium.