3D打印Sn-9Zn合金的性能研究

Effect study on the properties of 3D printing Sn-9Zn alloy

为解决Sn-Zn系合金易被氧化和易腐蚀等问题,获得高质量、性能稳定、成本低廉的无铅钎料,将喷射沉积3D打印技术应用到无铅焊料中,开展了Sn-9Zn合金的常规感应熔炼和喷射沉积3D打印成形试验。对两种方法制备的Sn-9Zn合金试样进行了常规拉伸试验和可焊性性能试验,对比分析了3D打印与感应熔炼两种方法制备的Sn-9Zn合金试样的力学性能和可焊性。研究结果表明:感应熔炼Sn-9Zn合金与3D打印Sn-9Zn合金的抗拉强度分别为43.3 MPa和42.7 MPa,屈服强度分别为26.3 MPa和25.7 MPa,断后伸长率分别为27.3%和27.7%,最大润湿力分别为3.37 mN和3.36 mN,可见选择适宜的3D打印工艺参数能获得力学性能和可焊性优良的Sn-9Zn合金。

Aiming at the problem that Sn-Zn series alloy is easy to be oxidized and corroded, and application of spray deposition 3D printing technology in lead-free solder, in order to obtain lead-free solder with high quality, stable performance and low cost, the conventional induction melting and spray deposition 3D printing experiments were conducted on Sn-9Zn alloy. The mechanical properties and weldability of 3D printing Sn-9Zn alloy and induction melting Sn-9Zn alloy were compared and analyzed. The results indicate that the tensile strengths of Sn-9Zn alloys by induction melting and 3D printing are 43. 3 MPa and 42. 7 MPa, the yield strengths are 26. 3 MPa and 25.7 MPa, the elongations are 27. 3% and 27. 7%, and the maximum wetting forces are 3. 37 mN and 3. 36 mN, the appropriate 3D printing process parameters can get excellent mechanical properties and weldability of Sn-9Zn alloy.