摘要
通过对化学成分(wB/%)为:C3.0～3.5,Si0.5～1.0,Mn0.5～1.0,Ni4.0～4.5,Cr1.0～2.0,Mo0.2～1.0的镍硬白口铸铁铁液进行过热和保温,研究过热温度和保温时间对该材料的石墨数量和碳化物数量的影响。试验结果表明:(1)石墨含量的变化规律:在1460℃的温度下,保温30min,组织中含有1%的石墨;在1480℃的过热温度下,随着保温时间的延长,组织中的石墨逐渐消失;在1500℃及以上的过热温度下保温时,组织中没有石墨出现;(2)碳化物含量的变化规律:随着过热温度从1460℃到1480℃、1500℃、1520℃碳化物数量逐渐增加,在1500℃以上过热保温时,碳化物数量保持不变。
By superheating and holding the molten Ni-hard white cast iron with composition（WB/%） of C3.0～3.5,Si0.5～1.0,Mn0.5～1.0,Ni4.0～4.5,Cr1.0～2.0,Mo0.2～1.0 the influence of superheating temperature and holding duration on graphite content and carbide content was investigated. The result showed： a） when holding at 1460 ℃ for 30 min, there was l% graphite existing in the structure; with lengthening of the holding duration at 1480 ℃, the graphite gradually disappeared; when holding at l 500 ℃ and higher temperature, no graphite appeared in the structure, b）when superheating temperature increasing from 1 460 ℃ to 1 480 ℃, to 1 500 ℃, to 1 520 ℃, the carbide content was increasing gradually; when holding at temperature higher than 1 500 ℃, the carbide content was kept unchanged.
出处
《现代铸铁》
CAS
2007年第5期47-49,共3页
Modern Cast Iron
关键词
镍硬白口铸铁
过热温度
保温时间
石墨
碳化物
Ni-hard white cast iron
superheating temperature
holding duration
graphite
carbide
