Titanium and titanium alloy of high strength

Titanium and titanium alloy of high strength, low density and other properties make it widely used in aerospace engineering. Such as various pipeline aircraft on the extensive use of titanium tube alloy valve, Titanium castingstype relates to the cut-off valve, check valve, needle valve, plug valve, ball valve and butterfly valve. Titanium valve as the key system components conveying fluid control titanium alloy pipe, widely used in chemical engineering. Valve valve with fasteners as important component, is also very important in valve design, manufacture. Implemented in a large PTA project mass production and application. Titanium valve is widely used in chemical industry, but must pay attention to its not suitable for any chemical medium. The hydrofluoric acid, hydrochloric acid, sulfuric acid and phosphoric acid and oxalic acid, formic acid, hot concentrated three chloroacetic acid, three trifluoroacetic acid and strong corrosive aluminum chloride, have severe corrosion effect of Titanium casting and titanium alloy, titanium valve is not suitable for this kind of chemical medium, should pay attention to in use.

The strength of titanium

Titanium tensile strength up to 180kg/mm2. Some of the strength of the steel is higher than that of titanium alloy, but the titanium alloy than strength (tensile strength and density ratio) was more than the high quality steel. Titanium alloy with heat resistant strength, low temperature toughness and fracture toughness is good, so it is much used for aircraft engine parts and rocket, missile structure. Titanium alloy can also be used as a fuel and oxidizer tank and high pressure vessel. Now has a titanium alloy for manufacturing automatic rifle, the launch tube of mortar base plate and recoilless gun. In the oil industry mainly for various vessel, reactor, heat exchanger, distillation tower, pipe, pump and valve etc.. Titanium can be used as electrode and a power station condenser and environmental pollution control device. titanium alloy coils  nickel shape memory alloy has been widely used in instruments. In the medical treatment, titanium can be used as artificial bones and various utensils. Titanium or steelmaking deoxidizer and stainless steel and alloy steel components. Titanium dioxide pigment and paint is a good raw material. Titanium carbide, carbon (hydrogen) is a new type of titanium alloy sheets carbide materials. Titanium nitride color close to gold, widely used in decoration. Titanium and titanium alloys used in large quantities for the aviation industry, "space metal" known; in addition, is widely used in the shipbuilding industry, chemical industry, machinery parts manufacturing, telecommunications equipment, hard alloy, etc..

Titanium development

Through research, the author thinks that the development direction of titanium alloy is mainly: (1) standard evaluation of fire retardant properties of titanium alloy and method. Flame retardant performance evaluation of titanium alloy right is one of the key techniques of flame retardant titanium alloys, including the simulation methods and detection technology of combustion of titanium alloy. At present, the flame retardant titanium sheets performance evaluation method has no uniform standards, countries have adopted different methods to test. Flame retardant performance evaluation method of titanium alloy and therefore the formulation of a unified standard will effectively promote the national Titanium alloy valves exchange. (2) increase the mechanical aerospace titanium castings properties of titanium alloy. Compared with the titanium alloy, titanium alloy is poor mechanical properties, low working titanium alloy plates temperature. Research on how to improve the mechanical properties of this alloy for deeper. (3) reduce the cost of titanium alloy. Titanium alloy containing large amount of noble metal elements of V, resulting in higher costs, limiting its application. The domestic scholars have studied to replace V with Mo part of low price.

Titanium alloy plate prices

Titanium alloy plate at the current price trend is not particularly good, the recent domestic titanium plate market demand are relatively sluggish, prices remain low stage, the short term, the market price will be difficult to recover, the current 2mm pure titanium plates plate price in the 105-115 yuan / kg (15.51-16.99 dollars / kg). Titanium is a metallic element, grey, atomic number 22, relative atomic mass 47.87. Combustion in nitrogen, high melting point. Blunt titanium and titanium based alloy is a structure with new materials, mainly for the aerospace industry and marine industry.
Titanium density of 4.506-4.516 g / cubic centimeters (20 DEG C), higher than that of aluminum and iron, copper, nickel below. But in the first than the strength of the metal, is 3 times of stainless steel, is the aluminum alloy [colored business: 1.3 times of the aluminum alloy plate]. The melting point of 1668 - 4 DEG C, the latent heat of fusion of 3.7-5.0 kcal / atom, the boiling point of 3260 plus or minus 20 DEG C, the latent heat of vaporization of 102.5-112.5 kcal / atom, the critical temperature of 4350 DEG C, the critical pressure of 1130 atm. Poor thermal conductivity and conductive properties of Sunrui titanium coils , similar to or slightly lower than stainless steel, titanium superconductor, superconducting critical temperature of pure titanium 0.38-0.4K. At 25 DEG C, titanium heat capacity is 0.126 cards / atom and degree, 1149 card / molecular enthalpy, entropy is 7.33 cards / atom and degree, metal titanium is paramagnetic material, permeability is 1.00004. Titanium has plasticity, extending high pure titanium rate can reach 50-60%, section shrinkage rate of 70-80%, but low strength, not as structure material. Titanium in the presence of impurities, a great influence on the mechanical properties, especially the interstitial impurities (oxygen, nitrogen, carbon) can greatly improve the strength of titanium, significantly reduced its plastic. Good mechanical properties with titanium as a structural material, through strict control of the impurity content is appropriate and adding alloy elements and to achieve.

Titanium precision castings Development of titanium sheet

 Development of titanium sheet
   High technology advances, the rapid development of the industry is not in another table . Recent sunrui Titanium precision castings high-tech materials are used are titanium sheet and high-tech ceramics , both have their different advantages.
    Table titanium alloy not only for skin allergies, and hard , good gloss . Her history with the development of stainless steel sheet is the same period , can be traced back in the 1950s .
    Titanium is not a rare metal , the nature of the content is very high , only ranked in the aluminum , sunrui titanium precision casting iron and magnesium. Compared with stainless steel table , it weighs more compact , but because the surface is very hard, that after a collision or other substances scratch is not easy to trace. Of course , its price will be relatively more expensive.

The reason for the use of titanium and titanium alloy body attachment Sunrui titanium valve

Production rod attachment denture material covering the earliest uses a gold alloy, which has good

mechanical properties , suitable elastic properties . Persist in the mouth , with good corrosion resistance,

and non-toxic side effects,  titanium tube in the developed countries is still being used as the main material attached to

the production role . However , due to the rising price of gold production costs , increasing denture ,

increased the financial burden on patients. Therefore, it uses a number of non- precious metals attachment ,

such as ceramic alloys , but when they are used for dental restoration materials , due to the corrosion of

metals produced , will be Titanium precision castings released within the alloy elements in the form of ions into the oral environment

and local organizations contacting cells or produce different biological effects , especially when using a

different alloy prosthesis , since the saliva in the oral cavity as an electrolyte to form the source cell,

a current corrosion .
    Therefore, the use of titanium and titanium abutments for implants , making the material attached to the

upper part of the body structure Titanium castings should also adopt the same kind of alloy , to prevent the generation of

electrochemical corrosion .