摘要
用垂直连铸技术拉制高致密零缺陷的铸铁空心型材,全断面呈现D+E型石墨形态,用其制作铸铁/铝合金镶铸复合体中的耐磨构件,并与以A、B型石墨为主的传统铸件进行比较。结果表明,因铸铁空心型材中石墨裸露面积减少而改善了铝液浸润状况,扩大了有效粘结面积;并因其晶界密度增加而拓展了铝原子扩散通道,使化合物层厚度增加4～5倍,降低了界面应力梯度。其综合效果是将铸铁/铝合金的界面粘结强度提高了50%左右。
The cast iron hollow bars with high density and zero defect, which show graphite morphology of type D ＆ E in full section, were made by vertical continuous cast process, the cast iron was used as the wear-resistant components in cast-iron /Al-alloy inlay complex, and it was compared with traditional cast iron with graphite type A or B. The results show that using the cast iron hollow bars as wear-resistant components in cast-iron/Al-alloy inlay complex, the condition of dipping into AI fluid is improved because of the exposed graphite area reduced, which leads to the effective bonding area enlarged; the diffusion channel of AI atom is expanded because of grain boundary increased, which makes the thickness of compound layer be increased by 4 -5 times, and the interfacial stress gradient lower. The combined effect is that the bonding strength improves about 50% in cast-iron/Al-alloy inlay interface.
出处
《铸造技术》
CAS
北大核心
2013年第3期345-347,共3页
Foundry Technology
关键词
界面强度
铁
铝结合区
轻量化构件
铸铁型材
耐磨镶圈
boundary strength
cast-irordAl-alloy combined area
light weight components
cast iron section bar, wearresistant ring
