Titanium alloy Fasteners-Profession Manufacturer

1.What is TC16 (Ti-3AI-5Mo-4.5V)?

TC16 alloy is a martensitic α-β two-phase titanium alloy with a nominal composition of Ti-3AI-5Mo-4.5V, containing α-stable elements Al and isomorphic β-stable elements Mo and V. The β stability coefficient of this alloy is slightly higher, Kβ=0.8, the strength in the annealed state is medium, and the plasticity is very good, it can be used for cold heading to make rivets and bolts like β alloy. TC16 is a high-strength titanium alloy that can be heat-treated, and the temperature of vacuum solution treatment is only 800°C: 150°C lower than that of TC4 alloy. The strength of the alloy after solution aging treatment can reach more than 1030MPa, and the stress concentration sensitivity to notch, deflection, etc. is small. TC16 alloy is mainly used to manufacture fasteners, the maximum working temperature is 350 C.

2. Application of fasteners in aerospace?

Titanium alloy fasteners generally require solution aging heat treatment to ensure that they meet the requirements for shear strength of 660MPa and tensile strength of 1100MPa.

Fasteners made of titanium alloy should be inspected in detail. In addition to observing whether there is damage to the appearance, mechanical properties and metallurgy inspections should also be carried out. Titanium alloy fasteners have strict material standards, quality, performance standards and requirements. ,

The processing technical conditions of titanium alloy fasteners should be consistent with the relevant requirements proposed in the AMS4967 standard (wire, annealed, forgings and rings, heat-treatable titanium alloy rods). There are clear standard requirements and performance requirements in terms of phase, appearance, defect control, and mechanical properties.

3. What is the process of fasteners?

Aerospace Seiko made a major breakthrough in the manufacturing process innovation project of TC16 titanium alloy fasteners for aviation models. On the basis of the original TC16 titanium alloy fastener hot heading forming manufacturing process, Aerospace Seiko has successfully realized the continuous cold heading forming of TC16 titanium alloy fastener through technological upgrading, which can eliminate the risk of overheating and overburning in the product hot heading process , It is of great significance to ensure the quality stability of titanium alloy fastener products and improve the efficiency of production and processing.
Since the plastic deformation ability of the original TC16 titanium alloy material cannot meet the needs of continuous cold heading, fastener manufacturers have been using hot heading forming processing technology to produce TC16 titanium alloy fasteners for aviation models. The upsetting process needs to go through multiple processes such as material cutting, turning, heating, and upsetting. The production efficiency is low, and there are still quality risks such as overheating and overburning of materials during processing. In order to ensure product quality and improve production efficiency, process innovation activities are carried out for raw material performance and heading technology. After hard work, the continuous cold heading of TC16 titanium alloy fasteners has been realized by using the developed new TC16 titanium alloy coil wire for cold heading.