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High-temperature-resistant aluminium casting alloy and cast part for internal combustion engines cast from such an alloy

A technology for casting aluminum alloys and internal combustion engines, which is applied in the field of casting aluminum alloys, can solve problems such as increased thermal cracking tendency and limited casting performance, and achieves the effects of improving tolerance, good casting performance and high strength

Inactive Publication Date: 2016-03-16
NEMAK LINZ
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AI Technical Summary

Problems solved by technology

The superior heat resistance of such cast aluminum alloys with Cu content leads however to an increased tendency to hot cracking and extremely limited castability

Method used

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  • High-temperature-resistant aluminium casting alloy and cast part for internal combustion engines cast from such an alloy
  • High-temperature-resistant aluminium casting alloy and cast part for internal combustion engines cast from such an alloy
  • High-temperature-resistant aluminium casting alloy and cast part for internal combustion engines cast from such an alloy

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Embodiment Construction

[0030] Three cast aluminum alloys E1, E2, E3 according to the invention were melted, the compositions of which are indicated in Table 1. Comparative alloy V was melted for comparison, the composition of which is likewise listed in Table 1 corresponding to the usual cast aluminum alloy "AlCu7MnZr".

[0031] Cylinder heads were cast from cast aluminum alloys E1, E2, E3, V, which were subjected to T6W treatment after solidification. Here, the cylinder heads were solution annealed at 480-500° C. for seven and a half hours each, then quenched with water and then thermally aged at 240° C. for over four hours. The mechanical properties were subsequently measured on the thus treated cylinder head in the area of ​​the combustion chamber: tensile strength Rm, yield point Rp0.2, Brinell hardness HB and elongation at break A. Forty casting samples each made of cast aluminum alloys E1 and E2 and fifteen casting samples each made of cast aluminum alloy E3 and comparative alloy V were exami...

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Abstract

The present invention relates to an aluminium casting alloy containing (in % by weight) Cu: 6.0 - 8.0 %, Mn: 0.3 - 0.55 %, Zr: 0.18 - 0.25 %, Si: 3.0 - 7.0 %, Ti: 0.05 - 0.2 %, Sr: up to 0.03 %, V: up to 0.04 %, Fe: up to 0.25 %, remainder aluminium and unavoidable impurities, and to a cast part for an internal combustion engine. The aluminium casting alloy according to the invention still has good mechanical properties at high temperatures even after a relatively long period of use and can at the same time be cast easily. The cast part according to the invention also has optimised mechanical properties when used at high temperatures and can at the same time be produced in an operationally reliable manner in terms of casting.

Description

technical field [0001] The present invention relates to a cast aluminum alloy which can facilitate casting and also has high strength in a hot state after a long service time at high temperature. [0002] The invention likewise relates to a component of an internal combustion engine, which is cast from a cast aluminum alloy. Such components are in particular cylinder heads or engine blocks. Background technique [0003] The ever-increasing demands on engine power on the one hand and on reducing fuel consumption and weight on the other lead to ever-increasing demands on the mechanical and thermal resistance of engine components cast from aluminum alloys . Therefore, suitable cast aluminum alloys for the manufacture of such components must have a high yield limit, high elongation at break, high thermal conductivity, low thermal expansion, and high creep at both room temperature and operating temperature Strength and favorable processing characteristics including good flow a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/14
CPCB22D21/007B22D25/02C22C21/14C22C21/18C22F1/057
Inventor 迈克尔·拉费特策德
Owner NEMAK LINZ
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