Cu-Sn系水雾化合金粉性能研究

Study on properties of water atomized Cu-Sn alloy powder

本实验系统地研究了含Sn质量分数分别为10%、15%、20%合金粉末的热压烧结组织、XRD相组成及力学性能。实验结果表明：Cu-Sn系粉末热压烧结温度较低,在700-720℃即可达到致密化;烧结组织从含Sn质量分数10%的单一固溶体转变为出现电子化合物的二相组织,和XRD线谱变化趋势相吻合;抗弯强度随Sn质量分数的增大变化不大,为700 MPa左右;冲击韧性从含Sn质量分数为10%的17J大幅下降至含Sn质量分数为20%的3J左右。实验中,结合胎体特性,分析了Cu-Sn系粉末用作胎体时,可提高金刚石工具的加工效率。

The hot pressing sintering organization,XRD phase composition and the mechanical properties of alloy powder containing 10wt%,15wt%,20wt% Sn respectively were researched systematically.It was identified that due to the low sintering temperature of Cu-Sn powder,the densification could be achieved at 700-720℃,and that the single solid solution sintering organization containing 10wt%of Sn was converted to two phases electronic compounds organization,which coincided with XRD spectrum inclination.The bending strength,which stayed around 700 MPa,changed little with increasing Sn content,while impact toughness dropped from 17 Jto 3J.Taking the matrix characteristics into consideration it was concluded that the Cu-Sn powder,when used as matrix,was conducive to improve the machining efficiency of tools.