What are the applications of TB8 high temperature titanium alloy?

The research and development of TB8 high temperature titanium alloy standard parts are mainly focused on high temperature titanium alloys at 600℃. Domestic standard parts of titanium alloys are mainly developed by the Institute of Metallurgy of the Chinese Academy of Sciences.The composition of Ti60 titanium alloy is a near-alpha-type heat-strengthened titanium alloy improved on the basis of Ti-5.5Al-4Sn-2Zr-1Mo-0.3Si-1ND-0.05CTI55, and its comprehensive performance has been improved through the ND strengthening. The long working temperature of this alloy can reach 600℃, which is suitable for compressor disks, drums and blades in the high pressure section of aircraft transmitters. Domestic research on high-strength titanium alloys is mainly focused on TB8TC21 and other brands of titanium alloys (developed by the Northwest Nonferrous Institute) TB8 titanium alloy has a composition of Ti-15Mo-3Al-2.7Nb-0.2Si medium-stabilized β-type titanium alloy. TB8 titanium alloy can be consumed in addition to the consumption of sheet and strip, but also foils, filaments, tubes, rods and forgings. The plate is mainly used in the manufacture of medium complexity of aircraft cold forming sheet metal parts, can replace the intensity level of 30CrMnSiA structural steel. The newly developed TC21 titanium alloy has stable mechanical properties and matches the indicators of strength, plasticity, fracture toughness, crack extension rate, etc. It is a highly promising high-strength and high-toughness damage-tolerant titanium alloy. In terms of flame retardant titanium alloy, Northwest Nonferrous Metals Institute has developed Ti40 flame retardant titanium alloy with Chinese characteristics at a lower cost. Ti-V-Cr system Ti-25V-15Cr-0.2Si high alloying composition of the Ti-V-Cr system of full beta titanium alloy, with good resistance to quenching performance and high temperature performance. ti40 titanium alloy will be suitable for aircraft launchers key components of the magazine and blades.

Hundreds of types are involved, and it is understood that the high standard root titanium fasteners manufactured by Aerospace Precision, a subsidiary of Aerospace Science and Industry, are the steel reinforcement connecting the products of manned spaceflight engineering. The technicians involved in the development have successfully solved a series of key technical problems such as titanium alloy upsetting, mold design, etc., which provides users with technical assurance.

Therefore, galvanic coupling corrosion and crevice corrosion have become important damage modes for aviation structures. Standard crevice corrosion test, standard galvanic coupling corrosion test, electrochemical polarization test, neutral salt spray test and cyclic immersion corrosion test are used because various data in aviation structures are frequently contacted and used. This paper discusses the contact corrosion behavior of aerospace titanium alloy fasteners and their connecting structures in a simulated marine environment. The titanium tubes were analyzed for corrosion mechanisms by scanning electron microscopy and x-ray diffraction, and corresponding contact corrosion control schemes were proposed.

The results show that carbon fiber epoxy composites co-cured glass cloth at the fastener screw joints can effectively control the contact corrosion of carbon fiber epoxy composites and titanium fasteners, and the connection combinations of carbon fiber epoxy composites are pulse-anodized TC16 bolts with pulse-anodized TC16 nuts (MoS_2 smooth)

Or connect pulse anodized and blue anodized titanium bolts regardless of the separate comparative parts. Stainless steel nuts Cr17Ni2 corrosion resistance are all superior to 1Cr11Ni2W2MoV Anodized LY12 aluminum alloy nuts have better corrosion resistance than stainless steel nuts. Regarding the anodized aluminum alloy LY12 interlayer material, the corrosion resistance of the anodized specimen with cladding layer is better than that of the anodized specimen with de-cladding layer, and the fastener articulation plan is as follows: titanium alloy TC16 bolts with aluminum plating and passivation, together with anodized LY12 nuts.