The aim of this work was to investigate the application of semisolid process on Pb-Sb alloys that are normally used for metallic parts in cars batteries, in order to increase their mechanical properties and corrosion resistance. The semisolid behaviour of a Pb-4%Sb alloy was analysed by means of rheological and calorimetry differential scanning experiments. The alloy was melt, treated by ultrasound to obtain the semisolid conditions and then poured into permanent moulds. Some of these samples were also heated in semisolid temperature range and injected in thixo-casting apparatus. Both poured and injected samples were completely characterized by metallographic analysis, mechanical test and electrochemical corrosion experiments. The results show an improvement of mechanical and corrosion resistance respect to samples obtained by conventional casting technique.
Semisolid lead-antimony alloys for cars batteries
POLA, Annalisa;GELFI, Marcello;ROBERTI, Roberto
2010-01-01
Abstract
The aim of this work was to investigate the application of semisolid process on Pb-Sb alloys that are normally used for metallic parts in cars batteries, in order to increase their mechanical properties and corrosion resistance. The semisolid behaviour of a Pb-4%Sb alloy was analysed by means of rheological and calorimetry differential scanning experiments. The alloy was melt, treated by ultrasound to obtain the semisolid conditions and then poured into permanent moulds. Some of these samples were also heated in semisolid temperature range and injected in thixo-casting apparatus. Both poured and injected samples were completely characterized by metallographic analysis, mechanical test and electrochemical corrosion experiments. The results show an improvement of mechanical and corrosion resistance respect to samples obtained by conventional casting technique.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
