GB/T 37584-2019 in English

This standard systematically specifies the technical requirements for the entire process of heat treatment of titanium and titanium alloy parts, and is applicable to high-end fields such as aerospace and medical implants. Key indicators such as β transformation temperature, hydrogen contamination, and surface α layer are controlled.

Precise temperature control

β transformation temperature (T_β) is the process reference point, and the actual value needs to be fine-tuned according to the composition of each batch of materials. The solution treatment temperature is usually controlled at T_β-15~40℃.

Hydrogen pollution prevention and control

• Ultimate vacuum of vacuum furnace ≤6.7×10^-3Pa
• Vacuum dehydrogenation treatment at 700℃ can reverse hydrogen diffusion
• Hydrogen increment needs to be ≤15ppm (GB/T 4698.15)

Case: Heat treatment of TC4 alloy aviation parts

A certain casing part uses TC4 alloy, and requires both strength and fracture toughness:

1. Double annealing process: 925℃×2h (T_β-30℃)→760℃×2h
2. Quenching transfer time ≤8s (section thickness＞25mm)
3. Vacuum partial pressure 1.33-13.3Pa prevents element depletion

The final product meets the K_IC value standard tested by GB/T 4161.

Equipment Selection Guide

Staff Training Focus

• Master the β transition temperature determination method (metallographic method/DSC method)
• Proficiently operate the vacuum furnace partial pressure control system
• Practical operation of hydrogen content detection (GB/T 4698.15)