Characteristics and application fields of titanium steel composite board
The metal layered composite board can achieve perfect metallurgical combination of different metals with extremely different strength, melting point and thermal expansion coefficient, and combine the advantages of different materials to fully utilize the use characteristics of different materials, greatly save precious metal materials and reduce equipment. Manufacturing costs make it possible to use rare metals in many fields. Composite materials produced by explosive composite technology can achieve the perfect combination of different metals without changing the composition and physical properties of the original materials. Metal composite panels can be individually designed and designed to be optimally used as needed. The metal composite board material not only has good weldability, formability, thermal conductivity and good mechanical properties of carbon steel, but also has excellent corrosion resistance of various layers. Therefore, it is widely used in petroleum, chemical, metallurgy, light industry, salt chemical industry, auxiliary power station, desalination shipbuilding, power and marine engineering.
A notable feature of titanium is its high corrosion resistance due to its high affinity for oxygen, which produces a dense oxide film on its surface that protects the titanium from dielectric corrosion. Metal titanium can form a passivation oxide film on the surface in most aqueous solutions. Therefore, titanium has good stability in acidic, alkaline, neutral saline solution and oxidizing medium, and has better corrosion resistance than existing stainless steel and other commonly used non-ferrous metals, and even comparable to platinum. Therefore, titanium is widely used in various chemical reaction vessels, heat exchanger materials and anti-corrosion fields, but the disadvantage is that the cost is high, especially when used as a structural component, and the titanium steel composite panel produced by the explosive composite method is particularly prominent. Both the corrosion resistance of titanium and the strength and plasticity of ordinary steel plates as structural members are particularly important because the cost is greatly reduced. With the continuous advancement of equipment manufacturing technology in China, the application fields of titanium steel composite board materials will continue to expand.
1 Petrochemical and chemical container equipment manufacturing
The manufacture of petrochemical equipment containers is a traditional application field of titanium steel composite board materials, and its application quantity has always occupied the first place. In the chemical industry, titanium has good stability in various acid, alkali and salt media except for four inorganic acids and highly corrosive aluminum chloride. Therefore, titanium is an excellent anti-corrosion material in the chemical industry and has been widely used. For example, a vacuum tower, a distillation column, a heat exchanger of a petroleum refinery, various reaction towers, a precipitation tank, a stirrer, and the like of a chemical plant. Urea is an important fertilizer. In the production process, urea, ammonia, ammonium carbamate and their mixture are highly corrosive under high temperature and high pressure conditions. After replacing the stainless steel with titanium steel composite board, the service life of the equipment is greatly extended and the maintenance time is greatly increased. Reduced, so the main equipment in the current urea production uses titanium steel composite sheet titanium to have special corrosion resistance to chlorine dioxide, chlorous acid, chlorite and other bleaching agents. Therefore, titanium steel composite board in the textile printing and dyeing industry There are also important applications in the bleaching equipment of the paper industry.
2 vacuum salt equipment manufacturing
Titanium and its alloys have excellent resistance to seawater and chloride solution corrosion and fluid washout. Since the 1980s, titanium steel composite plate salt production equipment has been put into use in vacuum salt production plants such as Sichuan and Inner Mongolia. Due to the smooth surface and corrosion resistance of titanium, it has a good effect on preventing salt scale on the evaporation tank wall and prolonging the tank washing cycle. The evaporation chamber made of titanium steel composite board has good effects on slowing down corrosion and salt scaling, prolonging production cycle and improving salt uniformity. In 1987, Sichuan Daan Salt Factory and Wutongqiao Salt Plant used two sets of 300,000 tons of vacuum salt production main equipment evaporation tanks using titanium materials, which promoted the application of titanium, only two sets of salt production equipment and evaporation tanks. The use of titanium and titanium steel composite panels reached 360 tons, making the vacuum salt industry one of the largest companies using titanium and titanium steel composite panels.
The application of titanium steel composite board reduces the use cost of salt plant equipment, and the corrosion resistance is better than that of duplex stainless steel, and the service life is long, but the price is lower than the market cost of using duplex stainless steel. In 2007, Baoti Group Composite Board Company supplied more than 600 tons of TA2/TA10 titanium steel composite board to Sichuan Jiuda Salt Factory for the equipment manufacturing of the 600,000-ton vacuum salt production project, becoming a single application titanium steel composite. The project with the largest quantity of plates has been operating well for more than four years.