铸造纯钛抛光方法的研究

目的 探讨不同抛光方法对纯钛铸件表面的抛光效果。方法 常规制作铸造纯钛试件35个，随机分为7组，除1个对照组外，其余6组分别用不同方法进行抛光处理。观察试件表面形貌，并测定表面粗糙度（Ra值），计算抛光前后的减重率（Wt%）及单位面积损失的厚度（H），比较各种抛光方法的抛光效果。结果 用氧化铝和氧化铬抛光膏抛光纯钛铸件可取得良好效果；铸件酸洗后进行电解抛光，表面粗糙度有一定改善。结论 氧化铝和氧化铬抛光膏可用于铸钛表面的机械抛光，电解抛光有一定效果，但电解工艺仍需改进。

Effects of Different Polishing Methods on Surface Roughness of Pure Titanium Castings

Objective To evaluate the effects of different polishing methods on surface roughness of pure titanium castings.Methods 35 pure titanium castings were devided into 7 groups,used for control,mechanic polishing and electrolytic polishing,respectively.Surface roughness(Ra value) of each castings was measured with a profilometer. Surface microstructure was studied by a scaning electron microscopy,and the weight loss(Wt%) and height loss on unit area(H) before and after polishing was calculated.Results The effects of mechanic polishing with aluminium oxide or chromium oxide were acceptable.Surface smoothness was improved with acid treatment followed by electrolytic polishing.Conclusion Aluminium oxide and chromium oxide can be used in mechanic polishing of pure titanium castings,and improvement should be made on electrolytic polishing methods.