Internal combustion engine component and method for the production thereof
View Patent ↗Disclosed is an internal combustion engine component ( 1 ) which is made of an aluminum alloy and comprises at least one area ( 2 ) that is subjected to a great thermal load during operation of the internal combustion engine. Said area ( 2 ) that is subjected to a great thermal load is small compared to the entire component ( 1 ) and is provided with an alloy composition which is modified in relation to the entire component ( 1 ) in such a way that the area ( 2 ) that is subjected to a great thermal load has a greater breaking elongation than the entire component ( 1 ).
1. A process for producing an aluminum alloy component of an internal combustion engine, comprising:
determining an area ( 2 ) of the component ( 1 ), which is highly thermally stressed during operation of the internal combustion engine,
forming a melt in said highly thermally stressed area ( 2 ) of the component ( 1 ),
introducing an additive ( 6 ) into the melt ( 5 ), wherein said additive is an aluminum alloy with a component of 1-2 wt. % silicon, less than 0.25 wt. % magnesium and less then 0.1 wt. % iron, and
cooling said melt, such that said highly thermally stressed area ( 2 ) has a higher aluminum content than the overall component ( 1 ) and exhibits a higher breaking elongation than the overall component ( 1 ).
2. A process according to claim 1 , wherein the melting is carried out using a beam process.
3. A process according to claim 2 , wherein said beam process involves a laser beam ( 4 ), a plasma beam or a WIG-process.
4. A process according to claim 1 , wherein said component is a cylinder head ( 1 a ).
5. A process according to claim 4 , wherein said thermally highly stressed area ( 2 ) is an intermediate area ( 2 a ) between respective valve bores ( 3 ).
6. A process according to claim 5 , wherein the depth of the thermally highly stressed area ( 2 ) having the altered alloy composition is from 0.2 mm to 5 mm.