【摘要】 使用预混合法和预合金法制备了Cu-Sn粉末，研究了Cu-Sn粉末在烧结过程中的显微组织和物相变化规律，同时测试了Cu-Sn粉末在不同温度条件下的烧结性能。实验结果显示，通过预混合法制备的CuSn10、CuSn20粉末烧结态组织由α相和α+δ共析组织组成，而预合金法制备的CuSn10粉末烧结态组织则由单一的α相组成。两种方法制备的粉末在相同条件下烧结后，预混合Cu-Sn粉末的烧结体相对于生坯产生了膨胀，预合金铜锡粉末烧结体则表现为收缩，且预合金Cu-Sn粉末烧结后的断裂强度、含油率和有效含油率均高于预混合粉末。更多还原

【Abstract】 Cu-Sn powders were prepared by pre-mix and pre-alloy process, the microstructure and phase changes of Cu-Sn alloy were studied after sintering, and the sintering properties of Cu-Sn powders prepared by these two methods were tested and compared. The experimental results show that the microstructure of pre-mixing CuSn10 and CuSn20 is composed of α phase and α + δ eutectic tissue after sintering, while that of pre-alloy CuSn10 is αphase. After sintering, the pre-mixed Cu-Sn green compacts expand, on the contrary the pre-alloyed green compacts shrinkage. In addition, the strength, oil content and effective oil content of the pre-alloyed Cu-Sn parts are higher than those prepared by the pre-mixing method.更多还原