Binary alloys containing up to 20% silicon ha1J~ been produced by both sand and chill casting. An 11 % silicon alloy has also been produced by sodium modificati.m. Dry wear tests have b~en carried out using a pin-on disc teclmt"que, the aluminium alloy as the pin and a heat-tr~ated steel as the disc. TE 99 通用摩擦磨損試驗(yàn)機(jī)