Abstract : it was verified through experiment and measurement that there was growth phenomenon taking place with nodular iron castings after graphitizing annealing at low temperature . the emergence mechanism and reason of the “ annealing growth nature ” was dicussed , and its prevention measures was proposed 文摘:通過(guò)試驗(yàn)和測(cè)試,證實(shí)了球鐵件經(jīng)低溫石墨化退火后存在的生長(zhǎng)現(xiàn)象,并對(duì)這種“退火生長(zhǎng)性”產(chǎn)生的機(jī)理及原因進(jìn)行探討,提出了防止措施。