多步法原位制备TiB2颗粒增强点焊电极用铜基复合材料及其应用

Multi-Step in Situ Preparation Tib2 Particle-Reinforced Copper Matrix Composites for Spot Welding Electrodes and Their Applications

为提高点焊电极的使用寿命,采用多步法制备TiB2增强的铜基复合材料。采用X射线衍射(XRD)、金相显微技术、扫描电镜(SEM)等表征手段对多步法制备的TiB2增强的铜基复合材料物相、微观形貌进行分析。通过对复合材料力学性能指标测量发现,多步法制备所制备的铜基复合材料具有较好的综合力学性能,将多步法制备的铜基复合材料加工成点焊电极,其寿命测试结果相较于其它对比样最高,寿命达到1500个焊点,是普通铬锆铜点焊电极寿命的2.6倍。

In order to improve the service life of spot welding electrodes,TiB2-reinforced copper matrix composites were prepared using a multi-step method.The physical phase and microscopic morphology of the TiB2-reinforced copper matrix composites prepared by the multi-step method were analyzed using X-ray diffraction(XRD),metallographic microscopy and scanning electron microscopy(SEM)characterization.By measuring the mechanical property indexes of the composites,it was found that the copper matrix composites prepared by the multi-step preparation had better comprehensive mechanical properties.The copper matrix composites prepared by the multi-step method were processed into spot welding electrodes,its life test results were the highest compared with other comparison samples,with a life time of 1500 solder joints,which was 2.6 times longer than the life time of common chromium zirconium copper spot welding electrodes.