titanium grade 1 Why study the reaction of titanium plates with steam

Tests carried out in a vacuum apparatus with a quartz microbalance in the spring . Reading accuracy is 4 × 10 - sample surface g / cm . Mercury manometer measuring system connected to titanium grade 1 the reaction chamber using the pressure .
    Titanium iodide as a sample . Breaking titanium strip cold rolled to a rod 0.7 mm thick . Then cut the strip size is 9 × 25 mm sample . In order to eventually remove surface dirt , before the test sample with a finely sandpaper and etched in 7% HNO3 solution in HF .
    The tube is filled with distilled water and vacuum means connected to the plug and the device as a source of water vapor . In order to remove the dissolved water gasification will remain for some time in the water under the stars . Samples were heated to a predetermined temperature in a vacuum after the tube with water and the system is turned on, and set up the equilibrium vapor pressure corresponds to the temperature in the system . When the system is full , the system is filled with water and cut off the tube , and then tested in a closed volume .
    Under 800,850,900 and 950 ℃ titanium grade 7 rod and 14 mm Hg vapor pressure tested titanium plate and steam reaction .
    Kinetics of these tests indicate that , in the beginning stage of the reaction , the reaction with water vapor titanium plates subject to the parabolic law . After the reaction started after a certain period of time becomes linear parabolic law rule.
    In order to identify the effect of pressure on the reaction rate , once at 4 mm Hg pressure two experiments .
    Titanium plate during the reaction and steam , and any of metals, and also the reaction gas , is composed by a number of successive stages , in which the main are: 1 ) the gas molecules collide with the metal , 2 ) gas molecules adsorbed on the metal surface 3 ) the dissociation of the gas molecules , 4 ) through the surface of the film agent diffusion reaction product , 5 ) chemical reaction.
    The reaction rate depends on the speed of the pro stage . It was found that the reaction pressure is reduced because the rate of 5 /6 and steam manganese remains unchanged , so it should be acknowledged that the reaction speed depends on the diffusion of the reagents titanium grade 2 sheet through the surface of the membrane , since it is the only one speed stage and the gas pressure independent .

titanium grade 5 Japan successfully implemented the use

Japan successfully implemented the use of 3D printing make bone graft
 Japan's Kyoto University Medical Research Division teams such as August 9 announced that it has made ​​a titanium grade 5 bone for different patients can be produced by the three-dimensional structure of the 3D printing technology, to four transplant patients with cervical disc successfully improved hand numb other symptoms.
    The researchers also try to do a part of the femur and spine skull . Kyoto University lecturer vine Chiun Kai said : "You can expect the technology used in the production of artificial bone resection due to a wide range of malignancies , such as bone , bone graft treatment , etc. It is believed that this technology is particularly beneficial to the complex three-dimensional shape of the pelvis and other bones . replication . "
    The team used 3D printing titanium grade 1 device to the patient's neck computed tomography (CT) data, layer by layer superimposed on a thin layer of titanium powder fired to produce a fully fit patients with cervical bone .
    Artificial chemical surface treatment and heat treatment , so that more patients with bone bonding . The artificial disc implant from the surgical removal of the success of improved hand numbness , difficulty walking and other symptoms .
    The transplant surgery is surgery clinical trials Affiliated Hospital of Kyoto University .

grade 1 titanium bar Marine titanium welding process

In recent years, many new ships began extensive use of titanium alloy . With the increase in the amount of grade 1 titanium bar , shipyard welding to enhance efficiency , product quality and stability , the need to develop some efficient titanium welding process. TA5 two kinds of titanium Shanghai Jiangnan Shipbuilding in thickness of 4mm Ti70 and 16 mm for welding object, plasma arc welding , laser welding and laser - arc hybrid welding titanium welding three high energy density of the process carried out explore, get the excellent performance of welded joints
A plasma arc welding
Plasma arc welding is the use of plasma arc welding method as a heat source . Gas heated by the arc generated from the solution , a nozzle at high speed compressed by water , and increasing the energy density of the solution from forming a plasma arc. Its stability , heat and temperature are higher than the arc , and thus has a greater penetration power and welding speed . For marine titanium welding tests show that plasma arc with concentrated energy , penetration , side welding good shape , no tungsten inclusions , less porosity , etc. , it is very suitable for welding of titanium and titanium alloys . More plasma arc welding process parameters , when the method is mainly related to the use of orifice nozzle diameter , welding current, plasma gas flow rate , welding speed , shielding gas flow.
Second, laser welding
Laser welding is a focused laser beam as the heat energy generated by the bombardment of the weldment for welding a high -precision welding method . Laser welding due to the high energy density, obtained greater penetration and high welding speed , and because the diameter of the laser beam is extremely small, so narrow weld and heat -affected zone , the welding residual stress and deformation is small . The main parameters of laser welding laser welding power , welding speed , defocusing amount , side-blown gas flow and shielding gas flow. Since the laser welding high welding speed , the welding process generally can not adjust the parameters of the process ,grade 2 titanium  so before the formal optimum welding parameters to be determined by a combination of pre- experiments.
Third, the laser - arc hybrid welding
Compared with conventional arc welding and laser welding, laser - arc hybrid welding weld penetration with a large , high process stability , high welding efficiency , strong weld gap bridging ability and welding deformation , etc., can greatly improve the welding efficiency and weld quality. Laser - arc hybrid welding can reduce the workpiece machining accuracy requirements groove welds may be improved over time high laser welding shortage and liquid bath due to higher absorption of the laser beam , laser welding can be compared greater penetration and a higher welding speed . Using laser - arc hybrid welding , laser and arc due to the presence of two heat sources , and each heat are more parameters to be adjusted , so make the laser and arc harmonic match with a lot of tests need to be explored .
Jiangnan Shipbuilding technology test results conducted show that plasma arc welding , laser welding and laser - arc hybrid welding excellent joint performance of the welded test plate . Process repeatability, low level requirements for welders , titanium grade 1 it is very suitable for the production of large quantities of rules seam welding. Mechanical test results showed that: the mechanical properties of butt joints meet the standard requirements, joint strength and ductility in the match with a reliable base metal Ti70; plasma arc welding and laser - arc hybrid welding using low intensity TA10 wire welding Ti70 plates, welding joint seam strength far exceeds the requirements of matches with Ti70 , which makes titanium alloy welding consumables when marine greatly broaden the range of options available in between strength and ductility, toughness seek to better balance.

titanium bar rod sheet plate Why should the chemical analysis of titanium and titanium alloys

 Titanium and titanium alloy with high mechanical properties, corrosion resistance, and the titanium seamless pipe proportion of small features. In the application of shipbuilding, chemical machinery defense, aerospace and food industries is increasing. This requires frequent inspection of material, so called for the corresponding chemical analysis. However, the analysis method on titanium and titanium alloy in a variety of journals published by not fully meet the requirements of the plant laboratory raised in this regard.
     Titanium and titanium alloys used directly without the need for separate procedures for sample titanium grade 7 rod dissolution methods of analysis which can detect the following types of elements: iron, magnesium, silicon, chromium. Determination of impurities on the issue has also given a strong note.

grade titanium 2 Titanium tube is the most excellent

Titanium tube is the most excellent materials corrosive media device
Industrial air pollution titanium grade 2 sheet control equipment is characterized by a structural material must be capable of performing a variety of processes and working conditions. All of these applications can be one or more of the following categories etching conditions: pH value is low, the combination of high volume, the presence of sulfur dioxide or hydrogen sulfide, the presence of other oxides, chlorides, chlorides, and may reach 250 ℃ of temperature. For devices working in these corrosive media, the titanium tube is their most excellent structural material.
      Excellent corrosion grade 2 titanium resistance of titanium alloy tube is out of the surface layer of a continuous, dense protective oxide film. Titanium oxide tube, neutral or weakly reducing medium generates blunt this stable oxide film, thereby preventing corrosion of the metal. Through passivation titanium tubes in aqueous solution can be determined titanium tubes, titanium tubes and can be seen in the acidic cyanide solution pH below 1.5 will be the road to the corrosion.

grade gr 2 Titanium pipe manufacturing existing sewer

Titanium pipe manufacturing existing sewer sewage treatment device
    According to the grade 1 titanium sheet information in September 1981 statistics, there WAO wastewater treatment unit 13 of the city is made ​​of titanium tubing. Except one, the other is under pressure temperature 175-204 ℃ and 2.4-3.4MPa be thermal regulation. Rensselaer, NY thermal conditioning apparatus at 204 ℃, the grade 4 titanium degree of oxidation of 50% water. In the United States the longest running titanium tube device is in the state of Florida boiling Lauderdale, this device has been in operation since 1972. Capacity and enable all of these dates titanium sewage sewer pipe manufacturing unit.
     In these devices, the titanium grade 5 chloride ion concentration is 500 to water 2500ppm, pH value of 4.3-5.0. So far, none of these devices are all aspects of the corrosion problems occurred.

grade gr 1 Beneficial properties and research

Beneficial properties and research in the field of titanium tubes
   Because titanium tube titanium seamless pipe in aviation, aerospace application of achievements, but also attracted dedicated and imaginative world's scientists and engineers handsome, prompting them through discussions and meetings, such as symposia, technical exchange meetings, international conferences etc. to exchange information and to develop further plans. Undoubtedly, the nature of its research titanium tube new application areas is certainly beneficial.
     It is clear that the titanium grade 7 rod titanium tubes in the energy and industrial applications thanks to the aviation, aerospace industry has been achieved. So, in the future they are also in those areas can support each other it? Conversion or exchange of information which can be considered from two aspects of the future development of the titanium tube industry and technology.

grade titanium 1 The utilization of research to reduce

The utilization of research to reduce consumption of raw materials titanium
Due to the limited reserves titanium grade 5 of rutile, attach great importance to the development of domestic titanium ore enrichment and utilization of research. It has been investigated dozens of processes, methodologies and the small number of high titanium slag or synthetic rutile production of over ten thousand to several hundred thousand tons scale plant.
     To reduce the consumption of raw materials, realization of magnesium (or sodium) and chlorine in the recycling process in order to reduce their production costs. Meanwhile, at home titanium grade 7 bar and abroad have great attention to improve the recovery rate of these materials, and to strengthen the "three wastes" The utilization of titanium and strong recovery in the production process.

xinnuo titanium grade with a metallic luster

Titanium is a chemical element with the symbol Ti, atomic number 22 , is a silvery-white transition metal , characterized by light weight , high strength , with a metallic luster , have a good corrosion resistance ( including sea water, aqua regia and chlorine ) . [ 1 ] Due to its chemical stability , excellent high temperature, low temperature resistance, anti- acid, anti- alkali and high-strength , low density , Known as "space metal ." Titanium in 1791 in Cornwall, England discovered by Gregor by Klaproth for the Titans of Greek mythology with the name .
Titanium is considered a rare metal , which is due to the presence of a dispersion in nature and difficult to extract . But its relative abundance ranks tenth in all elements. Titanium ores ilmenite and rutile are mainly widely distributed in the earth's crust and lithosphere being . Titanium also exists in almost all living organisms , rocks, water , and soil. The main ore extracted from the need to use titanium Kroll process or the Hunter process . The most common compounds are titanium dioxide, a white pigment can be used in the manufacture . Other compounds include titanium tetrachloride (TiCl4) ( as a catalyst for the manufacture of smoke or air and text ) and titanium trichloride (TiCl3) ( for the catalytic production of polypropylene ) . [ 2 ]
The two most useful properties of titanium , the corrosion resistance , the highest intensity and metal - weight ratio. In unalloyed condition, titanium strength comparable with some of the steel , but also 45% lighter . There are two allotropes and five natural isotopes from Ti to Ti, which is the highest abundance of Ti (73.8%). Chemical and physical properties similar to titanium and zirconium , which is the same as the number of valence electrons of the two, and belong to a family in the periodic table .