High-temperature aluminium alloy

Abstract

A cold hardening ceralumin used for manufacturing a casting component for bearing heat and mechanical load with excellent thermal stability, comprises: 11.0-12.0 wt% Silicon; 0.7-2.0 wt% Magnesium; 0.1-1 wt% manganese, at most 1 wt% iron; at most 2 wt% copper; at most 2 wt% nickel; at most 1 wt% chromium; at most 1 wt% co; at most 2 wt5 zinc; at most 0.25 wt% Ti; at most 40 ppm boron; optional 80-300 ppm sr and the balance aluminium, and other elements and impurities with respectively at most 0.05 wt% and in total 0.2 wt%. The alloy is particularly suitable to manufacturing a cylinder crankcase through a die manufacturing method.

Description

technical field [0001] The invention relates to work-hardenable aluminum casting alloys having good thermal stability for the manufacture of cast components capable of withstanding thermal and mechanical loads. Background technique [0002] Further developments of diesel engines aimed at improving diesel combustion and obtaining higher specific powers lead, inter alia, to increased explosion pressures and thus to pulsating mechanical loads acting on the cylinder crankcase, which place great demands on the material. Stringent requirements. In addition to high durability, in order to be used in the manufacture of cylinder crankcases, the material must also have high temperature cycle strength. [0003] Currently AlSi alloys are commonly used as thermally loaded components, the thermal stability is increased by alloying said alloys with Cu (copper), which however increases the tendency to thermal cracking and has a negative effect on castability. Applications in which thermal...

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Problems solved by technology

[0003] Currently AlSi alloys are commonly used as thermally loaded components, the thermal stability is increased by alloying...

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