Metal materials for frame glasses include copper alloys, nickel alloys and precious metals. Requires a certain hardness, flexibility, elasticity, wear resistance
Corrosion resistance, light weight, luster and good color, etc. Therefore, the metal materials used to make the frame glasses are almost all alloys or used after processing the metal surface.
1, white copper frame (copper-zinc alloy) (also nickel-copper alloy): the main components are copper 64%, zinc 18%, nickel 18%, the frame material is the cheapest and easy to process electroplating is mainly used to manufacture hinges, etc. , small parts and low-end.
2, high nickel alloy frame: nickel content of up to 80% or more, mainly nickel-chromium alloy, manganese-nickel alloy, etc., high-nickel alloy has better corrosion resistance, in addition, the material has good elasticity.
3, Monel material frame: nickel-copper alloy, nickel content of 63% copper about 28%, in addition to iron, manganese and other small amounts of metal, in particular: corrosion resistance, high strength, strong welding, for the mid-range The most materials.
4, pure titanium frame: titanium has a specific gravity of only 4.5, very corrosion-resistant, twice the strength of steel, used to make space shuttle case, etc., known as "space metal", and no metal allergies, early titanium exists With the difficulty of cutting and difficult welding, with the development of technology, these problems have been gradually solved in the Japanese market, titanium has become the mainstream, and titanium in the European and American markets is mainly from Japan. Titanium frames are generally indicated as Ti-P or TiTAN and are essentially made of titanium except for tows, hinges, and screws.
5. Memory titanium alloy frame: refers to a new alloy composed of nickel and titanium in atomic ratio 1:1. It is 25% lighter than the general alloy and has the same corrosion resistance as titanium. In addition, the elasticity is very good. Memory titanium alloy: characterized by shape memory below 0 °C, high elasticity between 0-40 °C, memory titanium corrosion resistance higher than Monel and high nickel alloy, but better than pure titanium and beta - Titanium is a bit weaker.
6. β-TiTAN titanium alloy: refers to a special alloy formed by mixing pure titanium (70%) and rare metals such as cobalt and chromium (30%). The ultra-light super-elastic frame can be made very fine. Because it is a stable alloy of titanium and rare metals such as cobalt and chromium, it does not cause skin allergies, and will have greater development and popularity in the next few decades.
7. Gold-plated frame: The process is to add brazing material or direct mechanical bonding between the surface metal and the substrate. Compared with electroplating, the surface metal layer of the coating material is thicker, also has a bright appearance, and has good durability and Corrosion resistance. According to the International Precious Metals Conference, products with a weight ratio of gold to alloy of 1/20 or more are indicated by GF, and products of 1/20 or less are indicated by GP.
8, K gold frame: generally 18K gold, indicating that the content of pure gold 24K in the frame is 18/24. If it is expressed by 750/1000, it means that silver, copper and other substances are 250/1000. 18K gold glasses, if the weight is 40 grams, the gold content is 18÷24×40=30g.