Astm B338 Gr2 Seamless Titanium Tube

Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of astm b338 gr2 seamless titanium tube in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.

Astm b338 gr2 Seamless Titanium Tube is a high quality seamless titanium tube, titanium metal's physical and chemical properties make itan extremely high quality metal material with excellent corrosion resistance, high temperature strength, light weight and other advantages. It is suitable for many different application fields, such as aerospace, medical, chemical and so on.

The manufacturing process of Astm b338 gr2 Seamless Titanium Tube is very precise, ensuring a high degree of material purity and excellent mechanical properties, while also ensuring the surface quality of the seamless titanium tube without any oxide layer to meet customer requirements for high-quality seamless titanium tubes. In addition, the titanium tube also has good machinability and weldability, which can be easily applied to the machining of various complex shapes, while also meeting the needs of customers for precision and quality.

Titanium alloy is mainly used in the production of aircraft engine compressor components, followed by rockets, missiles and high-speed aircraft structural parts. In the mid-1960s, titanium and its alloys have been used in general industry, for the production of electrolytic industry electrodes, power station condensers, oil refining and seawater desalination heaters and environmental pollution control devices. Titanium and its alloys have become a kind of corrosion-resistant structural materials. In addition, it is also used to produce hydrogen storage materials and shape memory alloys.
China began to study titanium and titanium alloys in 1956. In the mid-1960s, the industrial production of titanium materials began and TB2 alloy was developed.
Titanium alloy is a new important structural material used in the aerospace industry, the specific gravity, strength and use temperature between aluminum and steel, but higher strength than aluminum, steel and has excellent seawater corrosion resistance and ultra-low temperature performance. In 1950, the United States first used the rear fuselage heat shield, wind hood, tail hood and other non-bearing components on the F-84 fighter-bomber. Since the 1960s, the use of titanium alloy has moved from the rear fuselage to the middle fuselage, partially replacing structural steel to manufacture important load-bearing components such as spacer frames, beams, and flap slides. The use of titanium alloy in military aircraft has increased rapidly, reaching 20% to 25% of the weight of the aircraft structure. Since the 1970s, civil aircraft began to use a large number of titanium alloys, such as Boeing 747 passenger aircraft with more than 3640 kilograms of titanium. Aircraft with a Mach number greater than 2.5 use titanium mainly to replace steel to reduce structural weight. For example, the United States SR-71 high-altitude high-speed reconnaissance aircraft (flight Mach number of 3, flight height of 26212 meters), titanium accounted for 93% of the weight of the aircraft structure, known as "all titanium" aircraft. When the thrust to weight ratio of the aero engine is increased from 4 to 6 to 8 to 10, and the compressor outlet temperature is correspondingly increased from 200 to 300°C to 500 to 600°C, the original low-pressure compressor disc and blade made of aluminum must be changed to titanium alloy, or the high-pressure compressor disc and blade made of titanium alloy instead of stainless steel to reduce the weight of the structure. In the 1970s, the amount of titanium alloy in aeroengines generally accounted for 20% to 30% of the total weight of the structure, mainly for the manufacture of compressor components, such as forged titanium fans, compressor discs and blades, cast titanium compressor cartridges, intermediate cartridges, bearing housings and so on. The spacecraft mainly uses the high specific strength, corrosion resistance and low temperature resistance of titanium alloy to manufacture various pressure vessels, fuel tanks, fasteners, instrument straps, frames and rocket shells. Artificial Earth satellites, lunar modules, manned spacecraft and space shuttles also use titanium alloy plate welds.

Cutting characteristics
When the hardness of titanium alloy is greater than HB350, it is particularly difficult to cut, and when it is less than HB300, it is easy to stick the knife phenomenon, and it is difficult to cut. However, the hardness of titanium alloy is only one aspect that is difficult to cut, and the key is the influence of the comprehensive chemical, physical and mechanical properties of titanium alloy itself on its machinability. Titanium alloy has the following cutting characteristics:
(1) Small deformation coefficient: this is a significant feature of titanium alloy cutting, the deformation coefficient is less than or close to 1. The path of sliding friction of chips on the front tool surface is greatly increased, which accelerates tool wear.
(2) High cutting temperature: Because the thermal conductivity of titanium alloy is very small (only equivalent to 1/5 to 1/7 of No. 45 steel), the contact length of the chip and the front tool surface is very short, the heat generated during cutting is not easy to be transmitted, concentrated in the cutting zone and a small range near the cutting edge, and the cutting temperature is very high. Under the same cutting conditions, the cutting temperature is more than twice higher than when cutting 45 steel.
(3) The cutting force per unit area is large: the main cutting force is about 20% smaller than when cutting steel, because the contact length between the chip and the front tool surface is very short, the cutting force per unit contact area is greatly increased, which is easy to cause the collapse of the edge. At the same time, because the elastic modulus of titanium alloy is small, it is easy to produce bending deformation under the action of radial force during processing, causing vibration, increasing tool wear and affecting the accuracy of parts. Therefore, it is required that the process system should have good rigidity.
(4) serious cooling phenomenon: due to the chemical activity of titanium, at high cutting temperatures, it is easy to absorb oxygen and nitrogen in the air to form a hard and brittle skin; At the same time, plastic deformation in the cutting process will also cause surface hardening. The chilling phenomenon will not only reduce the fatigue strength of the parts, but also aggravate the tool wear, which is a very important feature when cutting titanium alloys.
(5) The tool is easy to wear: after the blank is processed by stamping, forging, hot rolling and other methods, the hard and brittle uneven skin is formed, which is easy to cause the breaking edge phenomenon, making the cutting of the hard skin become the most difficult process in the processing of titanium alloy. In addition, due to the strong chemical affinity of titanium alloy to the tool material, the tool is easy to produce adhesive wear under the condition of high cutting temperature and large cutting force per unit area. When turning titanium alloy, sometimes the front tool face wear is even more serious than the back tool face; When the feed rate is fr, the wear mainly occurs on the rear tool surface. When f>0.2mm/r, the front tool surface will wear; When using carbide cutting tools for finishing and semi-finishing, it is more appropriate to use VBmax<0.4mm for the rear tool surface wear.
In the milling process, due to the low thermal conductivity of titanium alloy material, and the chip contact length with the front tool surface is very short, the heat generated during cutting is not easy to transmit, concentrated in the cutting deformation area and the smaller range near the cutting edge, the cutting edge will produce a very high cutting temperature during processing, which will greatly shorten the tool life. For titanium alloy Ti6Al4V, under the conditions of tool strength and machine power, the cutting temperature is the key factor affecting the tool life, rather than the size of the cutting force.

Size Chart Of ASTM B338 Titanium Tubes Welded Tube

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