Effect of Forging Degree of Titanium Alloy on Microstructure and Mechanical Properties of Titanium Rods and Titanium Forgings

(1) Fine grinding

That is, the surface of titanium and titanium-containing alloy castings is polished by using conventional various types of emery rubber wheels. The problem that should be paid attention to during grinding is still not to make the casting heat, not to cause grinding damage on the surface of the casting, and to make the entire surface smooth.

(2) Barrel grinding method

The so-called barrel grinding method is to put the processed castings, abrasives, water and additives into the barrel-type grinding tank. The grinding barrel generates rotation and vibration, causing friction between the mixture of abrasives and the processed castings, and grinds the surface of the castings smoothly. It is characterized by no dust pollution, low labor intensity, and no heat generation in the conventional grinding process. At present, Japan has commercialized barrel grinders and abrasive materials used for grinding titanium and titanium-containing alloy castings, other metal castings, and plastics. Tests have confirmed that pk series abrasives have the highest grinding efficiency, but the surface roughness is also the highest.

(3) Mechanical polishing method

Use different specifications of soft cloth wheels or black brushes, dipped in titanium and titanium-containing alloy special polishing paste to polish the surface of titanium and titanium alloys. When polishing titanium castings, it is necessary to completely clear the contamination layer on the surface of the casting and no new grinding and hardening layer occurs, which will not achieve the desired polishing effect. High-speed and light-pressure methods are still used for polishing. The author has also tried to use the green polishing paste to polish titanium and titanium-containing alloy castings and achieved a relatively ideal polishing effect. The polished titanium and titanium-containing alloy castings cannot be washed immediately. The surface oxide film must be completely formed before washing, otherwise, the surface will darken.
Grade 2 Titanium Bar     Gr7 Ti-0.2Pd Titanium Wire     titanium threaded tube     Grade 12 Titanium Tube