超声低压铸造ZA35X合金的组织与性能研究

Microstructure and Properties of ZX35X AlloyCastings by Ultrasonic Low Pressure Casting

采用超声低压铸造技术制备了数控机床零部件用ZA35X合金,并进行了组织物相、不同温度下的力学性能和耐磨损性能的测试与对比分析。结果表明,超声低压铸造法可以制备出均匀、致密的数控机床零部件用ZA35X合金铸锭;铸锭由η-Zn、α-Al和CuZn5三种物相组成;在距离铸锭中心不同距离处的抗拉强度、冲击吸收功、耐磨损体积变化均较小,-20℃抗拉强度相差3 MPa、0℃冲击吸收功相差2 J、20℃磨损体积相差为0。

ZX35X alloy castings for numerical control machine tool element were produced by ultrasonic low pressure casting, and the microstructure, phase composition, mechanical properties and wear resistance of the castings were tested and analyzed. The results show that ultrasonic low pressure casting can produce compac and uniform ZX35X alloy castings for numerical control machine tool element, and the alloy as-cast is composed of three phases, which ＇were η-Zn,α-Al and CuZn5. Moreover, the tensile strength, impact energy and wear resistance at different locations are fewer changes, and the variation of tensile strength at -20℃ is 3 MPa, the variation of impact energy at 0 ℃ is 2 J, and the variation of wear resistance at 20 ℃ is 0.