【摘要】 为了进一步探究骨植入物用可降解金属铁锰合金的降解行为，采用激光熔覆技术制备Fe-30Mn-xCu(x=0,4%,6%,8%,10%,12%,质量分数)可生物降解骨替代合金，并通过光学显微镜、扫描电镜及其附带的能谱仪、X射线衍射仪、显微硬度计、电子万能试验机、高温摩擦磨损试验仪和电化学工作站等探讨了铜含量的变化对合金微观结构、力学性能及生物降解行为的影响。结果表明：铜的含量对合金的晶粒尺寸、硬度、强度、摩擦磨损性能、降解速率的影响均较大。随着铜含量的升高，晶粒尺寸减小，硬度上升，极限抗压强度上升，耐磨性先增强后减弱，降解速率先增加后下降，在10%铜时，耐磨性最好，铜含量6%时，降解速率最大。更多还原

【Abstract】 In order to further explore the degradation behavior of degradable metal iron-manganese alloys for bone implants, laser cladding technology was used to prepare Fe-30Mn-xCu(x=0, 4%, 6%, 8%, 10%, 12%, mass fraction, the same below) biodegradable bone replacement alloy. The effects of changes in copper content on the microstructure, mechanical properties and biodegradation behavior of the alloy were discussed through optical microscopes, scanning electron microscopes and their accompanying energy spectrometers, X-ray diffractometers, microhardness testers, electronic universal testing machines, high-temperature friction and wear testers and electrochemical workstations, etc. Results showed that the copper content had greater effects on the alloy’s grain size, hardness, strength, friction and wear properties, and degradation rate. When Cu content increased, the grain size decreased, the hardness and the ultimate compressive strength increased, the wear resistance and biodegradation rate firstly increased and then decreased. Moreover, the alloy prepared with 10% Cu had the best wear resistance, and the allow with 6% Cu possessed the maximum biodegradation rate.更多还原