Dynamic Balance Technique For Plastic And Elastic Deformation Of Titanium Materials(2)

Compared to steel and aluminum, pressing titanium plates and titanium alloys is more difficult. It requires precise temperature control and combined processes to achieve the formation of complex shapes. The classification of its processes and key technical points are as follows:

1. Cold forming:

Conditions requirements: Wall thickness < 2mm, deformation amount < 15%, and bending radius > 5 times the plate thickness.

Processing optimization: After cold pressing, the final annealing (heat holding at 600-650℃ for 2 hours) is required to eliminate residual stress and prevent cracking.

2. Hot forming:

Low-temperature hot forming (200-350℃): Deformation amount can reach 40%, suitable for medium-thickness billets (such as chemical equipment heads).

High-temperature hot forming (600-800℃): Deformation amount > 50%, fit for thick plates (> 10mm) or complex structural components (such as aircraft engine compartments).

Heating method: The blank is heated to the target temperature first, and then is heated to 150-200℃ to reduce temperature difference stress.

3. Post-preforming hot correction:

Process flow: First, cold press to make the pre-formed part, then heat it to 450-500℃ in a dedicated device for correction to eliminate springback and residual stress.

Advantages: Combining the efficiency of cold pressing with the accuracy of hot correction, it is suitable for high-precision workpieces (such as medical implants).

Application case: An aerospace enterprise used the hot forming process to manufacture titanium alloy wing panels at 750℃, achieving a single deformation amount of 60%, surface roughness Ra < 0.8μm, and reducing weight by 40% compared to traditional steel panels.

Blow molding achieves high precision and low material consumption through the continuous deformation of the workpiece and the rotating tool. Its core advantages and technical points are as follows:

1. Material utilization improvement: Blow molding can save 20% to 50% of materials, especially suitable for processing precious metal titanium materials (such as fuel tanks for spacecraft).

2. Surface quality optimization: The surface roughness of the product is Ra < 0.4 μm, with dimensional accuracy of ±0.1 mm, and no need for subsequent machining.

3. Process classification:

Conventional blow molding: Suitable for thin-walled cylindrical parts (wall thickness < 5 mm), achieving shape control through multiple deformation stages.

High-strength blow molding: Suitable for thick-walled parts (wall thickness > 10 mm), with a single deformation stage reaching 50%, but processing hardening needs to be controlled.

Application case: A satellite propulsion system used blow molding to manufacture titanium alloy gas cylinders, reducing the wall thickness from 15 mm to 8 mm, achieving a weight reduction of 47%, and the burst pressure reaching 1.5 times the design value.