球铁件退火后的生长现象及防止

Growth Phenomenon of Nodular lron Castings after Annealing and Its Prevention

通过试验和测试 ,证实了球铁件经低温石墨化退火后存在的生长现象 ,并对这种“退火生长性”产生的机理及原因进行探讨 ,提出了防止措施。

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.