(1) Fine grinding
That is, the surface of titanium and titanium-containing alloy castings is ground by using various types of emery rubber wheels. The problem that should be paid attention to when grinding is still not to make the casting produce heat, which can not cause grinding damage on the surface of the casting, and make the entire surface reach
To smooth.
(2) Barrel grinding method
The so-called barrel grinding method is to put the processed castings, abrasives, water and additives into the barrel grinding tank. The grinding barrel generates rotation and vibration, which causes friction between the mixture of abrasives and the processed castings.
Grinding is smooth and smooth. It is characterized by no dust pollution, low labor intensity, and no heat generation during conventional grinding. At present, Japan has commercialized barrel grinders and used for casting titanium and titanium alloys
Abrasives for grinding of metal parts, other metal castings and plastics are sold. Tests have confirmed that the pk series abrasives have the highest grinding efficiency, but the surface roughness is also the highest. The grinding efficiency of SA and B series abrasives is not
Like PK, but the surface smoothness of the titanium casting after grinding is the highest. At present, the Fourth Military Medical University has successfully developed the first dental barrel grinder in China.
(3) Mechanical polishing method
Use different specifications of soft cloth wheel or black brush, dipped with titanium and titanium alloy special polishing paste to polish the surface of titanium and titanium alloy. When polishing titanium castings, the contamination layer on the casting surface must be completely clear
And no new abrasive hardened layer occurs, the ideal polishing effect will not be achieved. High speed and light pressure are still used during polishing. The author has also tested the use of green polishing paste to polish titanium and titanium alloy castings,
A better polishing effect has been achieved. The polished titanium and titanium-containing alloy castings cannot be washed immediately. It must be washed after the surface oxide film is completely formed, otherwise the surface will become dark.
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