The watch is necessary in people's daily life, the case and the amount of material of the 95% Bracelet watch. The traditional watch is made of brass, surface plating Ni, etc.. The surface layer of the watch contains a large amount of nickel, often wearing a nickel allergy". Then came the austenitic stainless steel produced by the watch, but also because of the austenitic stainless steel containing nickel and chromium with human skin allergic reaction elements, therefore, from the beginning of the last century in 70s, began to study the use of scientific and technological personnel and human affinity for good manufacturing titanium watchcase, watch chain, watch strap, buckle table, pedicle and other parts.
Titanium as a watch material, is from high-grade waterproof, with timing function of the sports watch. Japan's titanium watch is developed by CITIZEN and Seiko two major manufacturers at the same time the high-grade titanium sports watches into the market. Subsequently, the Japanese watch company from 1972 began the development of all titanium watches. In order to titanium used in watches, the research in recent 30 years, researchers solve the seven technical problems, including pressure forming technology, machining technology, surface processing technology, processing technology, welding wear-resistant, decorative and biocompatibility.
Therefore, modern titanium watches have have the following characteristics: light, is stainless steel 60%; human sweat and seawater corrosion resistance; in metal material has the best strength; surface hardness is 2 times of stainless steel; wear no metal cold feeling; good affinity with the skin, no allergic reaction; decoration good effect.
At present, the production of titanium watches using industrial pure titanium, Ti-6Al-4V and titanium alloy Ti-15333. At the beginning of 1990s, the first to enter the market and price of high titanium watches, then due to increased production, process improvement, watch shell can be manufactured in investment casting, sheet metal forming and powder metallurgy method, price reduced, titanium watches have to high-end watches to mass.
Many countries in the world attach great importance to the study and production of titanium watches; the research work of Japanese titanium watches obtained Japanese titanium association award 1994 annual production of titanium metal space; the Swiss watch weighs only 50g; Northwest Research Institute of nonferrous metals in China also developed a "Titanium Watch NIN" brand series.
With the development of 3D printing technology, personalized custom printing titanium watches continue to appear. Luminor 1950 case, made of titanium metal, anti sensitive, anti erosion, its weight is lighter than the steel 40%. To further reduce the weight of the watch, watch in technology innovation case outline the internal hollow, extremely complex geometry, while retaining the excellent waterproof function watchcase (up to 10 bar, equivalent to about 100 meters depth) and anti tension torsion strong trait. This technique is called "direct metal laser sintering, optical fiber laser technology and layer structure made of three-dimensional parts using titanium metal powder, each layer of material is only 0.02 mm thick, after fusing a solid titanium metal. The finished product is not made of traditional technology, the weight is lighter, the appearance is even and flawless