News

Analysis of the National Standard Heat Treatment Process Specification and Technical Points for TA2 Titanium Alloy

TA2 titanium alloy, as an important material in the industrial field, has a wide range of applications in key areas such as aerospace and energy equipment. This article systematically analyzes the heat treatment process specifications and implementation points based on the national standard system.
1、 Technical Specification for Heat Treatment Process
1. Annealing process parameters
(1) Temperature range: According to GB/T 3620.1-2016, the annealing temperature of TA2 should be controlled between 750-800 ℃
(2) Insulation time: When the cross-sectional thickness is ≤ 25mm, the insulation time is 0.5-1 hour, and when it is>25mm, it is calculated as 1.5-2 hours
(3) Cooling method: air cooling or furnace cooling (≤ 300 ℃/h)
2. Stress relief annealing
(1) Temperature range: 480-595 ℃
(2) Insulation time: Calculated based on the thickness of the workpiece, maintain for 1 hour every 25mm
(3) Cooling method: air-cooled to room temperature
2、 Implement standard system
1. GB/T 3620.1-2016 Titanium and Titanium Alloys * and Chemical Composition
2. GB/T 5193-2018 Mechanical Properties of Titanium and Titanium Alloy Processed Products
3. GB/T 23605-2020 Method for determination of beta transition temperature of titanium alloys
3、 Key points of process control
1. Temperature accuracy control: ± 15 ℃ (conventional parts), ± 10 ℃ (aviation parts)
2. Furnace atmosphere requirement: argon protection (purity ≥ 99.995%)
3. Furnace loading method: Avoid stacking and maintain uniform heating
4、 Common process misconceptions
1. Excessive pursuit of high-temperature annealing: may lead to grain coarsening and reduce fatigue strength
2. Improper control of cooling rate: Rapid cooling can easily generate residual stress
3. Neglecting surface pollution: Failure to thoroughly clean before heat treatment can easily lead to hydrogen permeation
5、 Technical dispute analysis
1. Calculation standard for insulation time: difference in applicability between thickness calculation and mass method calculation
2. Cooling rate control: Different requirements for aviation components and conventional industrial components
3. Selection of heat treatment equipment: Balance of cost-effectiveness between vacuum furnace and protective atmosphere furnace
6、 Quality control requirements
1. Batch sampling inspection: 5% of samples are taken from each heat treatment batch
2. Mechanical performance verification: Focus on testing tensile strength (≥ 440MPa) and elongation (≥ 20%)
3. Microstructure testing: The content of alpha phase should be controlled above 95%
The heat treatment of TA2 titanium alloy should strictly comply with national standards and optimize process parameters based on specific application scenarios. It is recommended that production enterprises establish a comprehensive process monitoring system to ensure product quality stability through metallographic analysis, mechanical testing, and other means. At the same time, it is necessary to pay attention to the updates of domestic and international standards and adjust production processes in a timely manner.

[ 上一页 ] Research progress ...[ 下一页 ] Analysis of Shear ...