13.03.2017, 10:20
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CITIZEN SUPER TITANIUM
Цитата:
Technologies
Titanium is the fourth most abundant structural metal on Earth. An incredible material that does not react to sunlight, salt water, or any body chemistry, it reduces the potential of metal allergic reaction and is corrosion resistant.
Titanium Processing
In its natural state, titanium is very soft making it extremely difficult to process solid titanium for the purposes of watch manufacturing. CITIZEN designed and improved upon their own techniques to overcome these challenges.
Along the way we discovered a diverse range of advanced processing techniques. The process can be divided into 3 steps.
Titanium Processing
Pressing
Titanium is an active metal that reacts easily with oxygen, carbon, nitrogen and other elements. When forging, the titanium atoms easily adhere to the metal molds used in pressing and start fusing into the mold, making it difficult to reshape. In order to prevent the adhesive bonding of titanium we change its qualities; heating it to a high temperature before pressing, considerably lessening it’s resistance to shaping. This discovery lends itself to numerous pressing possibilities.
Cutting
Because it reacts easily to oxygen in the air, the filings from titanium stick to the edge of the drill and cause friction when drilling. This results in reducing the thickness of the drill and inaccuracy in the holes being cut. CITIZEN refined traditional cutting techniques for stable titanium processing though rigorous trial and error of numerous cooling oils, lubricants and cutting speeds.
Polishing
Polishing presents another hurdle when using titanium in watches. The conventional polishing process creates irregularities on the surface that would mar a watch’s sheen, owing to slight variations in the hardness of the crystal grains that form titanium. At CITIZEN we combine a number of polishing techniques, including barrel and Sallaz polishing, to realize better surface quality of Super Titanium™ watches.
Duratect Surface Hardening Technologies
CITIZEN’s proprietary technology, Duratect, was developeded to harden the surface of watch materials.
Machinery for Duratect treatment
CITIZEN has various ways for surface hardening.
It provides a range to surface hardness (up to more than five times the surface hardness of stainless steel) while at the same time, coloring the watches in silver, black, and gold, which were once thought impossible.
Variations in CITIZEN’s Surface Hardening Technology,Duratect, and Surface Hardness
Colorful Titanium Cases Realized through CITIZEN’s Surface Hardening Technology, Duratect
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(с) http://www.citizenwatch.com/en-us/ec...uper-titanium/
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