摘要
对于含碳化物等温淬火球墨铸铁(CADI),加入以铬为主的碳化物形成元素,并采用奥氏体化工艺来控制组织中碳化物的量。结果显示,随着试样中的铬的加入量从0.553%增加到0.997%,基体中碳化物量增多,经920℃保温100 min奥氏体化、然后在280℃进行等温淬火处理90 min,后其硬度从42.7 HRC提高到50.5 HRC,但冲击韧度从61.4 J/cm2下降到37.8 J/cm2。
With regard to carbide austempered ductile iron（CADI）,some carbide forming elements primarily chromium were added to,and took the austenitic process to control the amount of carbide in the matrix of CADI.With the amount of chromium in the samples increased,the amount of carbide increased in the matrix,the results showed that the as-cast samples were austenited at 920 ℃ for 100min and then austempered at 280 ℃ for 90 min,the hardness rose from 39.2 HRC to 47.5 HRC,but the impact toughness declined from 68.4 J/cm2 to 44.8 J/cm2.
出处
《铸造技术》
CAS
北大核心
2012年第1期17-19,共3页
Foundry Technology
关键词
碳化物
CADI
硬度
冲击韧度
铬
carbide
CADI
hardness
impact toughness
chromium
