Aluminum-Silicon Wrought Alloy
Aluminum-silicon wrought alloy contains silicon additions that increase wear resistance and friction freedom. It is used in automotive cylinder liners.
Physico-Chemical Mechanism of Action
Silicon reacts in the molten pool with aluminum to form a more stable alloy. It improves the crystal structure and prevents the occurrence of sulfur compounds that could lead to friction and wear.
Metallurgical Relevance & Welding Risks
Too high a silicon addition can lead to increased hardness and lower formability. This can cause difficulties in welding and lead to cracks or splinters. A too low silicon content can reduce wear resistance.
Workshop Practice & Action Instructions
When welding aluminum-silicon wrought alloy, careful control of temperature and time spectrum is crucial. Use a suitable welding method, such as TIG welding, to minimize hardness and produce a stable joint. Ensure adequate cooling to avoid cracks or splinters.