I.Manufacturing methods and processes
1. Material selection
This product supports a variety of titanium alloy materials such as Gr1 (industrial pure titanium), Gr2 (standard industrial pure titanium), Gr5 (Ti-6Al-4V), etc. Thereinto:
Gr1: Excellent plasticity, suitable for complex special-shaped parts with high cold forming requirements;
Gr2: Balanced strength and corrosion resistance, widely used in chemical and marine environments;
Gr5 (Ti-6Al-4V): The preferred choice for high-strength, lightweight design, suitable for high-load scenarios such as aerospace and medical implants.
All materials are in accordance with ASTM standards, with sufficient stock and support customization according to drawings.
2.Processing method
Adopt five-axis CNC precision machining as the core process, combined with titanium alloy characteristics to optimize the process:
Plate cutting: use laser cutting and water jet technology to avoid material embrittlement caused by heat-affected zones;
Roughing and semi-finishing: adopt a low speed and large feed strategy to reduce tool wear and cutting heat accumulation;
Finishing: Through micro-lubrication cooling technology and PCD tools, the dimensional accuracy (up to IT7 level) and surface integrity are guaranteed;
Hole processing: For the rebound characteristics of titanium alloy, step drilling and reaming processes are used to ensure hole tolerance and verticality.
3. Surface treatment
Deburring and polishing: mechanical polishing and electrolytic polishing are combined to eliminate stress concentration points;
Pickling passivation: the surface layer α contamination layer is removed through the nitric acid-hydrofluoric acid system, forming a dense oxide film (TiO₂), and improving corrosion resistance;
II. Core performance characteristics
1. Extremely high specific strength
The tensile strength of Gr5 titanium alloy ≥ 895MPa, the density is only 4.43g/cm³, and the specific strength is better than that of high-strength steel and aluminum alloy, which is suitable for the coexistence of lightweight and high-load scenarios.
2. Significant lightweighting effect
Compared with steel, the weight is reduced by about 40%, which effectively reduces inertial performance consumption and improves motion accuracy in dynamic systems such as aerospace and robot joints.
3. Excellent corrosion resistance
In chloride ion environment and oxidizing medium, the passivation film has strong stability and corrosion resistance exceeds that of stainless steel, and is suitable for chemical, shipborne and biological implantation environments.
4. Good durability and reliability
The fatigue strength is as high as ±500MPa (10⁷ cycle), and it has excellent creep resistance (long-term stability below 300°C), and maintains structural integrity under high-temperature vibration conditions.
5.Biocompatibility and low-temperature performance
Gr1/Gr2 is ISO 10993 biocompatible and suitable for medical implants;
It remains tough at a low temperature of -196°C to meet the needs of liquid nitrogen environment.
III.Professional technology supplement: difficulties and countermeasures in titanium alloy processing
Cutting heat control: using high-pressure internal cooling tool holder and customized cutting fluid to force the temperature of the tool tip;
Vibration suppression: Optimize the tool path and asymmetric clamping scheme through dynamics to avoid thin-walled structure resonance;
Stress relief: Vacuum annealing treatment (650-800°C) is added between key processes to release machining stress.
IV. Summary of application fields
High-end equipment: aero engine blade brackets, spacecraft servo connecting rods;
Medical technology: orthopedic implants, surgical robotic joints;
Energy and chemical industry: corrosive medium valve components, deep-sea exploration structural parts;
Precision instruments: optical adjustment racks, semiconductor transmission arms.
This product is based on titanium alloy material science, through the deep integration of CNC process and surface engineering technology, to achieve the high precision, high reliability and long life requirements of special-shaped structural parts under extreme working conditions. Its core advantages of lightweight and corrosion resistance have become a new generation of strategic material solutions to replace traditional stainless steel and aluminum alloys.
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