两种抛光方法对纯钛和钴铬合金粗糙度的影响

Influence of Two Polishing Methods on the Surface Roughness of Pure Titanium and CoCr Alloy

目的:研究两种抛光方法对纯钛和钴铬合金表面粗糙度的影响。方法:将纯钛和钴铬合金各分为3组,除一个对照组外,其余两组分别进行机械法和化学法抛光。记录试件抛光后的减重率(wt(),测量表面粗糙度Ra值,并用扫描电镜(SEM)观察试件表面形态变化。结果:同种金属经过不同抛光处理后,减重率和表面粗糙度Ra值都有显著差异(P<0.01),且纯钛和钴铬合金分别经过同种抛光处理后,减重率和表面粗糙度也均有显著差异(P<0.01)。扫描电镜观察表明,化学抛光后钴铬合金表面更加光滑,均匀一致。结论:与纯钛相比,钴铬合金更容易抛光,且化学法比机械法更易于获得良好的金属表面。

Objective： To investigate the influence of two polishing methods on the surface roughness of pure titaniurn and CoCr alloy（ chromium -- cobalt alloy）. Methods： Each kind of metal was divided into three groups . Except a control group, the others were polished with mechanic and chemical polishing, respectively. Then the weigh --relief（wt % ） and Ra value were measured. The scanning electron microscopic （SEM） was used to confirm the surface change of test samples. Results： The weight--relief and surface roughness （Ra value） of the same metal had significant difference （P〈0.01） between mechanic and chemical polishing ,and they also had significant difference （P〈0.01） between pure titanium and CoCr alloy after the same polishing method. It was showed that the surface of CoCr alloy was more smooth and uniformity. Conclusion： CoCr alloy was more easily polished. Compared to mechanic polishing, chemical polishing could gain better metal surface.