Subsequent processing and quality inspection of Ti-6Al-4V (Ti Grade 5) alloy components

The bending process is not the end of the machining - the internal structure of the Ti-6Al-4V (Ti Grade 5) alloy workpiece will still have residual internal stress from the machining. If not properly handled, deformation may occur during later use. And quality inspection is the "final checkpoint" to determine whether the component meets the standards.

1. Must do: Stress relief annealing treatment
Place the bent workpiece into the heating equipment and heat it at a temperature of 550-600℃ for 1-2 hours to completely eliminate internal stress. For example, for titanium alloy bending parts used in medical implants, if this step is omitted, after being implanted into the human body, they may undergo slight deformation due to stress release, which could cause serious risks.

2. Strict Inspection: 3 key indicators must not be overlooked
• Bending angle tolerance: According to the GB/T 3621 standard, the angle tolerance must be controlled within ±1°. For connection-type bending parts in the aerospace field, an angle difference of 0.5° could lead to assembly misalignment, thereby affecting the safety of the entire machine.

• Surface defect inspection: Use strong light and a magnifying glass to carefully examine. There must be no cracks, depressions or other defects - these flaws not only affect the appearance, but also become "stress concentration points", reducing the service life of the component.

• Mechanical property testing: The focus is on testing the tensile strength at the bending point. It is necessary to ensure that the tensile strength of the base material is retained at 90% or more. For example, for an aviation-grade Ti-6Al-4V (Ti Grade 5) alloy support, if the tensile strength at the bending point is only 85% of the base material, it may rupture directly in the high-altitude and high-pressure environment.