热处理工艺对医用髋关节钛合金疲劳性能的影响  

Effect of heat treatment on fatigue properties of titanium alloy for medical hip joint

作　　者：周娴[1] 杨钢[1] 周林[1] 孙彦华[1] 岳有成[1] 

机构地区：[1]昆明冶金研究院,云南昆明650031

出　　处：《金属热处理》2016年第5期142-145,共4页Heat Treatment of Metals

基　　金：2012年云南省重大科技专项(2012ZE008)

摘　　要：研究了医用髋关节坯料经过不同热处理后的力学性能、疲劳性能以及疲劳断口扩展断裂特性。结果表明:医用髋关节最优的热处理工艺是560℃加热4 h,炉冷,抗拉强度925 MPa,伸长率达11.3%,疲劳断裂周次达12773次。在最优热处理工艺条件下,医用髋关节低周疲劳稳态扩展主要为疲劳条带扩展,瞬断区表现为微区解理断裂。Mechanical properties, fatigue properties and fracture features of titanium alloy medical hip joint were investigated according to different heat treatment. The results show that a preferable heat treatment process of the medical hip joint is annealed at 560 ℃ for 4 h with furnace cooling. The tensile strength, elongation and fatigue cycle numbers are 925 MPa,11. 3% and 12773 times, respectively. Under the optimum annealing process, the low-cycle fatigue of medical hip joint in the stable spread region is fatigue striation expansion mechanism, and the final crack region mainly presents micro-cleavage fracture.

关 键 词：钛合金 髋关节 热处理 低周疲劳 

分 类 号：TG156.2[金属学及工艺—热处理]