珠光体可锻铸铁球化退火工艺研究  

A Study on Annealing Process to Granulate the Pearlite of Malleable lron

作　　者：王建华[1] 易丹青[2] 

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105 [2]中南大学材料科学与工程系,湖南长沙410083

出　　处：《现代铸铁》2000年第4期32-33,共2页Modern Cast Iron

摘　　要：采用金相法研究了由片状珠光体可锻铸铁转变为粒状珠光体基体的球化退火工艺。结果表明，片状珠光体可锻铸铁在共析点 AC1以下 (680℃ )保温 210min球化退火和在共析点 AC1以上 (820℃ )进行 12min短时球化退火后空冷都可获得粒状珠光体可锻铸铁。A granulation annealing process to change the flake pearlite of malleable iron into granular pearlite was studied with metallography method.The result showed that malleable iron with tranular pearlite could be obtained with both two granulation annealing proceses:heating the flake pearlite malleable iron to a temperature lower than eutectold point Ac1(680℃ ),holding for 210min;or heating to a temperature higher than eutectoid point Ac1(820℃ )holding for a short time of 12 min,and then air cooling.

关 键 词：可锻铸铁 珠光体 球化退火 金相法 

分 类 号：TG163.21[金属学及工艺—热处理]