固溶处理对Mg-Zn-Y-Zr-Ca生物镁合金微观组织和力学性能的影响  

Effect of solution treatment on microstructure and mechanical properties of Mg-Zn-Y-Zr-Ca biological magnesium alloy

作　　者：张文鑫[1,2] 孙毅[1,2] 许春香[1,2] 张金山[1,2] 韩少兵 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]先进镁基材料山西省重点实验室,山西太原030024

出　　处：《材料热处理学报》2017年第6期61-66,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51574175;51474153)

摘　　要：通过合金的制备,微观组织的观察以及力学性能的测试,研究了固溶温度以及固溶时间对医用生物镁合金Mg-3Zn-1Y-0.6Zr-0.5Ca组织和性能的影响,选择出最佳的热处理工艺。结果表明:提高固溶温度和延长保温时间都能够使第二相溶质原子充分溶进镁基体,增大固溶度,从而提高合金的抗拉强度,但会使合金的塑性下降。本实验合金经过460℃固溶24 h后,抗拉强度达到210 MPa,伸长率达到11.7%,大大提高了铸态生物镁合金的力学性能。Effects of solution temperature and solution time on microstructure and mechanical properties of Mg-3Zn-IY-0. 6Zr-0.5Ca alloy were investigated by the preparation of alloys, the observation of microstructure and the testing of mechanical properties. The optimum heat treatment process was selected. The results show that precipitates of the alloys are gradually dissolved after increasing the heating temperature and extending the holding time. Accordingly, tensile strength of the alloys increases, but the plasticity is reduced. The alloy solid-solution treated at 460 ℃ for 24 h exhibits the excellent mechanical properties, and its tensile strength and elongation reach 210 MPa and 11.7% , respectively, and the mechanical properties of as-cast magnesium alloys are greatly improved.

关 键 词：生物镁合金 固溶处理 微观组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]