用熔体直接反应法制备了TiB2/ZL101复合材料;用光学显微镜、SEM、拉伸试验机等对复合材料的组织、力学和切削性能进行了测试分析,并与用钠盐变质处理的ZL101合金进行了对比.结果表明:制备的TiB2/ZL101复合材料组织为细小等轴树枝状α-Al及细小板片共晶硅,其抗拉强度高于ZL101铝合金的,但塑性却低于ZL101铝合金的;切削工艺相同时,切削ZL101合金和TiB2/ZL 101复合材料刀具后刀面磨损速率相近,而后者加工表面粗糙度值低于前者的;TiB2/ZL101复合材料的加工表面存在两种类型裂纹,第二种类型裂纹对其疲劳性能有害.
The TiB2/ZL101 composites were fabricated by direct reaction technique. The microstructure of composites was analyzed by means of optical microscoper, SEM and tensile tester. The mechanical properties and cutting performance of the composite were also tested. ZL101 alloy modified by Na-salt was compared with the composite. The results show that the microstructure of TiB2/ZL101 composite was fine equiaxed dendrities α-Al and fine plate-like eutectic silicon, the tensile strength was higher than that of ZL101 alloy, but the plasticity was opposite. Under the same cutting condition, the tool flank wear rate was close for cutting TiB2/ZL101 composite and ZL101 modified by Na-salt. The surface roughness of the composite was less than that of ZL101 modified by Na-salt. Two types of cracks were observed on the surface of cutting rod for TiB2/ZL101 composite. The second type of crack was harmful to the fatigue property of composite.
参考文献
| [1] | B. Zhao;C.S. Liu;X.S. Zhu .Research on the vibration cutting performance of particle reinforced metallic matrix composites SiCp/Al[J].Journal of Materials Processing Technology,2002(1/3):380-384. |
| [2] | 王大镇,刘华明,韩荣第,郑镇洙.SiCp增强铝基复合材料切削加工中刀-屑摩擦模型及其磨损性能研究[J].摩擦学学报,2000(02):85-89. |
| [3] | 代汉达,刘耀辉,高印寒,杜军.加工Al2O3f+Cf/ZL109混杂增强复合材料的刀具磨损性能研究[J].摩擦学学报,2005(05):436-440. |
| [4] | Quan Yanming;Zhou Zehua .Tool wear and its mechanism for cutting SiC particle-reinforced aluminium matrix composites[J].Journal of Materials Processing Technology,2000(1/3):194-199. |
| [5] | 严复钢,刘兆晶,李凤珍,章德铭,张艳丽.原位TiCp/Fe复合材料的可加工性初探[J].哈尔滨理工大学学报,2003(02):84-86. |
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