Metal frames have always been the favorite of many successful people, giving them a noble and elegant temperament. Generally, metal materials for spectacle frames include copper alloys, nickel alloys, and precious metals. Because metal frames require a certain degree of hardness, flexibility, elasticity, wear resistance, corrosion resistance, light weight, luster and good color, etc., the metal materials used to make the frames are almost all alloys or The metal surface is processed and used. There are many types of metal frames, such as white copper frames, memory titanium frames, gold frames, etc. What are their characteristics? We together look.
1, white copper frame (copper-zinc 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 frames.
2, high nickel alloy frame
The nickel content is as high as 80% or more, mainly nickel-chromium alloy, manganese-nickel alloy, etc., high-nickel alloy has better corrosion resistance, and 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, characterized by corrosion resistance, high strength, strong welding, the most used material for the mid-range.
4, pure titanium frame
Titanium has a specific gravity of only 4.5, is very resistant to corrosion, and is twice as strong as steel. It is used to make the spacecraft case, etc. It is called "space metal" and has no metal allergy. Early titanium materials have problems such as difficult cutting and welding, and these problems have been gradually solved with the development of technology. Titanium frames are generally indicated as Ti-P or TiTAN and are essentially made of titanium except for tows, hinges, and screws.
Metal frames are available in a variety of materials
5, memory titanium frame
It refers to a new alloy composed of nickel and titanium in atomic ratio of 1:1, which is 25% lighter than ordinary alloys, and has the same corrosion resistance as titanium, and the elasticity is very good. Memory titanium alloy exhibits shape memory characteristics below 0 °C, exhibits high elasticity between 0-40 °C, and memory titanium corrosion resistance is higher than Monel and high nickel alloy, but pure titanium and β- Titanium should be a bit weaker.
6, β-TiTAN titanium alloy
It 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 frame
The process is to add a brazing material or a direct mechanical bond between the surface metal and the substrate. Compared with electroplating, the surface metal layer of the coating material is thicker, and 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.
There are so many classifications of metal frames, are you already a little confused? The advantages of metal frames include good corrosion resistance, high stability, high strength, good elasticity, etc. While maintaining good characteristics, there are so many materials for you to choose, be sure to carefully select and purchase one. The right pair of glasses!
