Titanium alloy is a new important structural material used in the aerospace industry. Its specific gravity, strength, and service temperature are between that of aluminum and steel, but it is stronger than aluminum and steel and has excellent seawater corrosion resistance and ultra-low temperature performance. In 1950, the United States used the F-84 fighter-bomber for the first time as a non-load-bearing component such as a rear fuselage insulation panel, air hood, and tail hood. At the beginning of the 1960s, the use of titanium alloys moved from the rear fuselage to the mid-airframe and partially replaced the structural steel to make important load-bearing components such as bulkheads, beams, and flaps. The use of titanium alloys in military aircraft has rapidly increased to reach 20% to 25% of the aircraft's structural weight. Since the 1970s, civil aircraft began to use a large amount of titanium alloys, such as the Boeing 747 passenger aircraft with more than 3,640 kg of titanium. Titanium for aircraft with a Mach number greater than 2.5 is primarily intended to replace steel to reduce structural weight. Another example is the US SR-71 high-altitude high-speed reconnaissance aircraft (with a flight Mach number of 3 and a flying height of 26,212 meters). Titanium occupies 93% of the aircraft's structural weight and is called the "all-tire" aircraft. When the thrust ratio of aircraft engines is increased from 4-6 to 8-10, and the compressor outlet temperature is correspondingly increased from 200-300°C to 500-600°C, the original low-pressure compressor plates and blades made of aluminum must use titanium alloy material, or use titanium alloys instead of stainless steel to make high-pressure compressor disks and blades to reduce the structural weight. In the 1970s, titanium alloys used in aircraft engines generally accounted for 20% to 30% of the total weight of the structure, and were mainly used for the manufacture of compressor components such as titanium forged fans, compressor disks and blades, cast titanium compressors, and intermediates, machine boring, bearing housing and so on. The spacecraft mainly utilizes the high specific strength, corrosion resistance and low temperature resistance of titanium alloys to manufacture various pressure vessels, fuel tanks, fasteners, instrument straps, frames, and rocket shells. Man-made earth satellites, lunar modules, manned spacecraft, and space shuttles also use titanium alloy sheet weldments.
The commonly used heat treatment methods are annealing, solid solution and aging treatment. The heat treatment process of titanium alloys can be summarized as:
(1) Stress relief annealing: The purpose is to eliminate or reduce the residual stress generated during the process. Prevent chemical attack and reduce distortion in some corrosive environments.
(2) Complete annealing: The purpose is to obtain good toughness, improve processing performance, facilitate reprocessing and increase the dimensional and structural stability.
(3) Solution treatment and aging: The purpose is to increase the strength. The α-titanium alloy and the stabilized β-titanium alloy cannot be subjected to the intensified heat treatment, and only the annealing is performed in the production. The α+β titanium alloy and metastable β titanium alloy containing a small amount of α phase can be further strengthened by solution treatment and aging.
The RVGQ series vacuum heat treatment furnace is suitable for the Ti, titanium alloy workpiece heat treatment, with the custom made design temperature( or standard 1300℃) and effective working zone size, it can meet your requirement of gas quenching, brazing, annealing, tempering, solid solution, aging, etc, with 6/10/12/16/20bar high pressure fast cooling pressure, the cooling effect is excellent and workpiece has small deformation after heat treatment. SIMUWU provides all kinds of vacuum heat treatment furnace, just let us know your requirement.
Tag: titanium alloy, titanium alloy heat treatment, titanium alloy annealing, titanium alloy solid solution, titanium alloy aging, ti alloy vacuum heat treatment furnace, vacuum heat treatment furnace
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