Titanium Alloy Long Head Double Threaded Bolts Cone Shape

Titanium alloy long head Cone shape with double thread Polished bolt.
 
Description

Titanium is a metal chemical element, chemical symbol Ti, atomic number 22, located in the fourth period, IVB group in the periodic table of chemical elements. It is a silver-white transition metal characterized by light weight, high strength, metallic luster, and resistance to wet chlorine corrosion. But titanium cannot be used in dry chlorine. Even dry chlorine at a temperature below 0°C will undergo a violent chemical reaction to form titanium tetrachloride, which will then decompose to form titanium dichloride, or even burn. Only when the water content in the chlorine gas is higher than 0.5%, the titanium can maintain reliable stability in it.

Polishing method of titanium and titanium alloy:
(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 needs to be paid attention to during grinding is still not to cause the casting to generate 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 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. , Leveling.
(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 alloy. 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 using 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.

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