titanium round bar cast titanium alloy plates smaller

Casting and mechanical properties of titanium plate deformation difference 

The mechanical properties are usually cast titanium plates titanium round bar‍ are below the performance of similar titanium plate deformation, especially in the plastic show more respect for the highlight, which is mainly due to the results of casting and casting defects organizational constraints, cast titanium alloy plates smaller than the other properties of the cast alloy drops. 

     For example, the yield strength titanium alloy casting fell only 13%, titanium wire manufacturers‍ while 60% ​​of the small decline in aluminum, steel declined by 25 percent, cast nickel-based alloys decreased by 17%, which illustrate the performance characteristics and deformation of cast titanium with titanium rivaling negative energy characteristics, and in some ways even more than the deformation titanium round bar‍ properties of titanium, especially in fatigue performance.

titanium plate for sale Due to simplify the learning activity

How the development of titanium tube casting process 

  At present, the domestic technology of cast titanium tubes titanium round bar‍ have carried out some research and development work has evolved from the initial simple graphite casting process to the coexistence of multiple process steps, their level has been greatly improved. Casting titanium tube is quite extensive, almost all already known to use cast molding method. Recently, more widely used in the production process is machined graphite, graphite tamping precision investment casting and ceramic shell mold casting process. 

     Due to simplify the learning activity of titanium alloy tube has, titanium wire manufacturers‍ making it the casting process is different from iron-and nickel-based alloy, and has many unique features, which is mainly manifested in the choice of mold material. Cast titanium tube holding type material used must have a high chemical stability, high thermal shock resistance, low moisture absorption capacity and low titanium round bar‍ thermal resistance, complete with mold material at these performance requirements are still being explored.

titanium alloy plate If the cyclic heat treatment

Impact on performance titanium heat treatment cycle 

The phase transition in titanium stress is small, with a simple heat treatment, it is difficult to change the original casting organizations, especially the grain titanium sheet suppliers‍ boundary organization. 

To refine casting titanium organization, people were cycling in the heat treatment. Volume effect of the use of the accumulation phase, resulting in 

And increased stress, prompting recrystallization, resulting in multilateral and grain refinement sheet of tissue. 

     Experimental results show that the alloy has Ti6A14v thick widmanstatten, the P-phase region through a ten cyclic heat treatment (980 a 

500 ℃), enables thin sheet first roughening, titanium wire manufacturers‍ and broken off, so that the structure refinement. Then a continuous grain boundary is not 

Change, and even some coarsening. If the cyclic heat treatment (980 a 500 ℃, 10 times the water-cooled ten 900 ℃, 2h air-cooled) before pre-

P first heated to a broken fire zone (1010 ℃, water quenching), become fully martensite after cycle heating and cooling, a grain boundary 

Disappeared or broken off, the degree of titanium round bar‍ refinement and organizational uniformity will increase its alloys have significantly improved fatigue performance.

titanium tube stock Marine titanium welding process

In recent years, many new ships began extensive use of titanium alloy . With the increase in the amount of titanium alloy materials , 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 titanium plates for sale‍Shipbuilding 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 , 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 titanium plate suppliers‍ 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 , 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 , titanium plate suppliers‍ 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 tube stock 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 the reaction chamber using the pressure .

    Titanium iodide as a sample . Breaking titanium strip cold rolled to a rod 0.7 titanium round bar‍ 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 ℃ 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 , titanium rod stock‍ 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 titanium plates for sale‍ of the reagents through the surface of the membrane , since it is the only one speed stage and the gas pressure independent .

titanium tube stock Japan successfully implemented the use of 3D printing

Japan successfully implemented the use of 3D printing make bone graft

 Japan's Kyoto University Medical Research Division teams such as August 9 titanium plates for sale‍ announced that it has made ​​a 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 titanium plate suppliers‍ and other bones . replication . "

    The team used 3D printing 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 titanium plate suppliers‍ 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 .‍

titanium plate Memory alloy pipe has been used in combination

Memory alloy pipe has been used in combination with automatic control , the sleeve may be made ​​of shape memory alloy instead of welding , is in the low temperature expansion of the tube to approximately 4% of the full , a socket assembly with a titanium plate for sale heated , shrinkage of the sleeve restore the prototype , form a tight engagement . U.S. Navy aircraft hydraulic system uses a 100,000 such joints, oil spills and damage over the years never happened . Ship and submarine oil pipeline damage , repair it with a shape memory alloy fittings, very convenient. In some parts of the inconvenience of construction , the pin made ​​of shape memory alloy , into the hole is heated to separate the trailing end automatically curl to form single assembly .

Memory alloy is particularly suitable for thermo-mechanical and automatic temperature control , automatic opening and closing has made ​​room arm can open the windows are in the sunshine during the day , automatically turns off when the night temperature drops. Memory alloy heat engine designs are also a lot that they can be in with a low temperature difference between the two media work , so as to take advantage of industrial cooling water , titanium plates for sale nuclear reactor heat, ocean thermal and solar power opened up new avenues . Now the problem is widespread efficiency is not high, only 4 % to 6% , to be further improved .

Memory alloys in medical applications is also very compelling. E.g., the bone with the bone plate , not only can two fixing broken bones , and the recovery of the original shape of the compression force is generated , forcing the broken bones are joined together . After straightening teeth using dental wire , long clip ligation of cerebral aneurysms and vas deferens , with the support plate straightening the spine , are implanted in the human body temperature by the action starts, thrombus filter is also a new product memory alloy . After being straightened filter implanted vein , will be gradually restored into a network , thereby preventing clot 95% flow to the heart and lungs.

Artificial heart is a more complex structure of the organ , muscle fibers of the titanium bar stock elastic memory alloy thin film made ​​of ventricular cooperate to mimic ventricular contraction . Now water is pumped been successful.