During the drawing process of titanium alloys, heat treatment processes are essential to improve the plasticity and drawing properties of the material. Below are some specific heat treatment processes that can improve the drawing properties of titanium alloys:
Solid solution treatment: This is a commonly used heat treatment, usually carried out in the beta-phase region, which increases the plasticity of the material. For example, TC4 titanium alloy can be solid solution treated to improve its drawing properties.
Aging treatment: After solid solution treatment, aging treatment is usually required to obtain better mechanical properties. Aging treatment can be carried out in the α+β two-phase region or in the α-phase region, and the strength and plasticity of titanium alloys can be optimized by precisely controlling the aging temperature and time.
Intermediate annealing: During the drawing process, intermediate annealing can reduce the effect of work hardening, recrystallize the grains and improve the plasticity of the material. For example, in the drawing process of TC4 titanium alloy, the intermediate annealing treatment can make the grain equiaxialization and improve the plasticity.
Double annealing: some studies have proposed the concept of double annealing, such as the first annealing at 880 ℃, and then the second annealing at 550 ℃, this process can improve the microstructure and mechanical properties of TC32 titanium alloy.
Control of cooling rate: In the heat treatment process, control of the cooling rate is essential to obtain the desired microstructure and properties. For example, rapid cooling after solution treatment can form martensite, while slow cooling is beneficial to the formation of finer grain organization.
Precisely Controlled Heat Treatment Regime: The phase composition, microstructure and room temperature tensile properties of Ti6246 alloy can be significantly affected by precisely controlling the temperature, time and cooling method of the heat treatment.
β grain control: By controlling the growth pattern of β grains through β zone solution and aging treatment, the mechanical properties of TC18 titanium alloy can be optimized.
Influence of temperature on tensile properties: For example, in the drawing process of TC4 titanium alloy, the heat treatment of 700~750°C can obtain good mechanical properties.
Simulation of heat treatment: Using molecular dynamics to simulate the heat treatment process, the effects of different heat treatment parameters on the mechanical properties of TC4 titanium alloy can be predicted.
