摘要
采用X射线衍射仪(XRD)、场发射扫描电镜(FESEM)和磨料磨损试验机研究了含碳化物的等温淬火球墨铸铁(CADI)微观组织及其耐磨性能。结果表明,快冷CADI材料含有较多的碳化物(体积分数,24%),明显高于慢冷CADI试样(9%)。对相同冷速的试样,较高的固溶温度和较长的等温淬火时间会提高材料的奥氏体含量和奥氏体中的C含量。CADI材料的耐磨性主要取决于碳化物含量的多少,碳化物含量高材料耐磨性能好;其次是奥铁体组织,奥氏体含量越多、奥氏体C含量越高,材料的耐磨性能越好。
X-ray diffraction （XRD）, field-emission scanning electron microscope （FESEM） and abrasive wear testing machine were used to investigate the microstructure and wear resistance for carbidic-austempered ductile iron （CAD1）. The results show that rapid cooling results more carbides （volume 24%） in cast CADI, which is obviously higher than that of cast CADI with slow cooling rate. For samples with the same cooling rate, higher solution temperature and longer austempering time can increase the austenite amount of ausferrite and its C content. The main influence of wear resistance for CADI material is carbide amount, the higher carbide amount the greater wear resistance. Besides, the ausferrite is another factor on wear resistance. The more austenite ofausferrite and the higher C content ofaustenite, the greater wear resistance.
出处
《铸造》
CAS
CSCD
北大核心
2014年第5期419-423,共5页
Foundry
基金
中国科学院重点部署项目(CXJQ120104)
关键词
CADI
耐磨性
奥铁体
奥氏体
C含量
CADI
wear resistance
ausferrite
austenite
carbon content
