Position：
Home >> News >> Technical Q&A
What is the difference between titanium steel, pure titanium and titanium alloy? |
| Often receive private letter to seek advice recently, ask me titanium steel, pure titanium, titanium alloy has what distinction after all, we will explain briefly today. Titanium steel is not a standard academic name, but a commercial name. Because 316L stainless steel corrosion resistance, acid and alkali resistance performance is better than the general stainless steel, the standard grade is 022Cr17Ni12Mo2, mainly contains Cr, Ni, Mo, the figure represents the percentage probably contains. Thus, titanium steel is titanium free, its main component is still iron. This trade name is in order to be different from other stainless steel as an ornament, and get a higher value. In fact, the cost of 316L stainless steel and sweat corrosion resistance is indeed better than the general common stainless steel. And really can be called titanium materials, generally is two categories, one is pure titanium, titanium alloy. The highest amount of titanium is just made from titanium sponge, which is made from titanium tetrachloride reduced by magnesium, and it looks like this: Looser and porous, low strength, can not be directly used as titanium material, is as the most upstream material of titanium, after melting, forging, rolling, processing into a variety of shapes of plate, wire, pipe and so on. The titanium content of sponge titanium is close to 100%. But titanium is so reactive that it easily reacts with oxygen, nitrogen, and hydrogen in the air when it comes into contact with it, so 100% purity is almost impossible. Generally speaking, titanium content is higher than 95%, become industrial pure titanium. Pure titanium is divided into TA1-TA4 according to the content of titanium and impurities. What we usually see are TA1 and TA2. The impurities are mainly oxygen, nitrogen, hydrogen, carbon, iron and so on. The higher the titanium content, the softer it is, the less strong we're talking about, but the more resilient it is. Therefore, when we make titanium belt buckles and titanium accessories, TA1 material will be used in places where the force is not very strong, and TA2 material will be used for shafts and small screws. When we do pure titanium cups, we cannot use TA2, the higher the purity, the better, especially the hydrogen content must be low, otherwise because the toughness is not enough, it is easy to crack, or there are more obvious, a stretch lines, or pitta, the scrap rate will be quite high. Again, titanium alloy, as the name implies, is titanium and other metals, non-metal alloy. These metals are associated with nonmetals such as aluminum, molybdenum, vanadium, chromium, iron, zirconium, tin, oxygen, carbon, etc. Titanium alloy according to the different metallographic structure is divided into TA, TB, TC series. I won't go into that here. Take the most commonly used TC4 titanium alloy as an example, its titanium content is 90%, aluminum 6%, vanadium 4%, so also called titanium 6 aluminum 4 vanadium. TC4 titanium alloy is the earliest developed and most widely used titanium alloy in the world, and also the earliest titanium alloy used in medical treatment. Its output accounts for more than half of the total output of various titanium alloy products in the world, and more than 80% in the aerospace industry. It has high anti-corrosion performance, strength is higher than pure titanium, toughness is good, processing and welding is relatively easy, so the comprehensive performance is very excellent, and also like pure titanium is not allergic. Is it pure titanium or titanium alloy? This is not conclusive, different materials are suitable for different products, generally speaking, excluding shape and other factors, titanium alloy material costs are higher than pure titanium. Of course, the titanium alloy here is to the regular grade, is based on titanium to add other metals and non-metals, rather than in other metals to add a little titanium, containing a little titanium to pretend to be the kind of titanium alloy. I hope consumers can have more common sense, open their eyes and buy good value for money. |