稀土铈对铝青铜组织及耐磨性的强化作用  

Microstructure and Wear Resistance of New Aluminum Bronze with Ce

作　　者：纪嘉明[1,2] 鲁远勇 吴晶[1,2] 孟国萃[1,2] 

机构地区：[1]江苏大学材料科学与工程学院 [2]江苏省高端结构材料重点实验室 [3]镇江汇通金属成型有限公司

出　　处：《特种铸造及有色合金》2013年第7期672-675,共4页Special Casting & Nonferrous Alloys

基　　金：国家科技型中小企业技术创新基金资助项目(09C26213203808);国家火炬计划资助项目(2010GH030468)

摘　　要：研究了稀土铈含量(质量分数)为0、0.05%、0.15%、0.25%的Cu-Al-Ni-Fe-Mn铝青铜的组织变化,并采用M-2000型磨损试验机进行了对比试验。结果表明,适量加入稀土铈能有效地细化显微组织,提高合金的强度、延展性和耐磨性,在Cu-Al-Ni-Fe-Mn合金中添加0.15%稀土铈时,铝青铜晶粒细小、圆润,分布均匀,无论是在油润滑条件还是干摩擦条件下材料耐磨性均达到最好;当稀土铈添加量达到0.25%时,角块状、细片状组织增加,晶界粗化,铝青铜耐磨性呈下降趋势。Effects of varied Ce addition, such as 0. 0.05% ,0.15%, 0.25% in weight, on microstructure and wear resistance of Cu-Al-Ni-Fe-Mn aluminum bronze were investigated by OM （optical microscopy）, SEM （scanning electron microscopy） and M-2000-type abrasion tester. The results indicate that the addition of proper Ce content can effectively refine the microstructure and improve the tensile strength, ductility and wear resistance. With 0.15% Ce addition, fine and round grain with uniform distribution can be observed in the Cu-Al-Ni-Fe-Mn alloy, and desirable wear resistance can be obtained. However, with 0.20% Ce addition, the polygonal and lamellar structure are increased in the alloy with the coarseness of grain boundary, leading to the deterioration of wear resistance of the alloy materials.

关 键 词：Cu-Al-Ni-Fe-Mn铝青铜 稀土铈 显微组织 耐磨性 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG146.11[金属学及工艺—金属材料]