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为改善Ti6Al4V的生物摩擦学性能,分别采用直径为4、6和10 mm的喷丸对其进行表面强化处理,然后用TR240粗糙度仪测表面改性层的表面粗糙度Ra,在MRTR多功能摩擦磨损试验机上以ZrO_2球/Ti6Al4V表面改性层为摩擦副进行人工唾液和透明质酸钠溶液润滑下的生物摩擦学试验,使用S-3000N扫描电子显微镜观察Ti6Al4V表面改性层的组织形貌和生物摩擦学试验后的磨痕形貌。结果表明:随着喷丸直径的增大,Ti6Al4V表面改性层的表面粗糙度Ra从1.32μm降低到1.05μm,生物摩擦学试验中的摩擦因数呈现出先降低后增大的变化趋势,改性层磨痕的磨损程度呈现出先减轻后加重的变化趋势,但不同直径喷丸二次强化所获得改性层的各项性能在试验中都最差。
In order to improve the biological tribological properties of Ti6Al4V, surface-enhanced shot peening with diameters of 4, 6 and 10 mm respectively was used to measure the surface roughness of surface modified layer with TR240 roughness tester. Friction and wear testing machine to ZrO_2 ball / Ti6Al4V surface modification layer friction pairs of artificial saliva and sodium hyaluronate solution under the lubrication of the biological tribological test using S-3000N scanning electron microscope to observe the surface morphology of Ti6Al4V surface modification layer And the morphology of wear scar after biological tribological test. The results show that the surface roughness Ra of Ti6Al4V surface modification layer decreases from 1.32μm to 1.05μm with the increase of shot size. The friction coefficient in the tribological test shows the trend of first decreasing and then increasing, The abrasion degree of the wear marks of the layer presents the trend of first increasing and then decreasing. However, the properties of the modified layer obtained by the second strengthening by the different diameter shot peening are the worst in the experiment.