铸铁/铝合金镶嵌界面结合强度的增强途径研究  

Research of Improving Bonding Strength of Cast Iron/Al-alloy Inlay Interface

作　　者：许旸[1] 彭明诚 卢正欣[1] 王爱娟[1] 王海生[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048 [2]成都银河动力有限公司工艺研究所,四川成都610505

出　　处：《铸造技术》2013年第3期345-347,共3页Foundry Technology

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.

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 

分 类 号：TG249[金属学及工艺—铸造]