Thanks to their exceptional lightweight properties, high strength, and corrosion resistance, titanium machined parts are finding increasingly widespread application in high-end manufacturing through material design and process optimization.
Today, let's explore some key facts about titanium machined parts.
I. Physical Properties of Titanium Machined Parts
1. Lightweight Advantages
With a density of 4.51 g/cm³-just 57% that of steel-titanium boasts the highest specific strength among industrial alloys, making it ideal for applications requiring weight reduction, such as aerospace and consumer electronics.
Typical Applications: Titanium alloys account for 15% of the C919 aircraft's material composition, and the use of titanium alloy mid-frames in foldable smartphones reduces weight by 30%.
2. Low Thermal Conductivity: With a thermal conductivity only one-fifth that of steel, heat tends to accumulate during machining, causing tool overheating, which requires high-pressure cooling technology to mitigate.
II. Mechanical Properties
1. High Strength and Toughness
Tensile strength ranges from 686 to 1,176 MPa. At high temperatures (550–600°C), these alloys maintain a creep strength of over 300 MPa.
Excellent low-temperature performance: Suitable for extreme environments such as liquid hydrogen storage tanks.
2. Low Modulus of Elasticity: The modulus of elasticity is approximately 1.078 × 10⁴–1.176 × 10⁴ MPa, which is half that of steel. This makes thin-walled components prone to deformation during machining, requiring optimized clamping rigidity.
III. Environmental Adaptability
1. Corrosion Resistance: The surface oxide film self-repairs in oxidizing media; its resistance to seawater and acid mist corrosion outperforms that of stainless steel; the hydrogen permeability of hydrogen fuel cell bipolar plates is <1×10⁻¹² cm²/s.
2. Temperature Resistance: Withstands temperatures up to 600°C over the long term and can withstand extreme environments of up to 2000°C for short periods.
3. Hydrogen Embrittlement Resistance: Alloys such as Ti-0.2Pd exhibit outstanding resistance to hydrogen permeation in nuclear reactor coolants, preventing brittle fracture.
IV. Machining Characteristics
1. Machining Challenges
High chemical reactivity leads to adhesive wear with cutting tools; YG-type cemented carbide tools must be used, and cutting speeds must be controlled below 60 m/min.
Significant work hardening tendency; a layered machining strategy can reduce surface residual stresses.
2. Plastic Deformation Characteristics: Hot working must be performed above the β phase transformation point; cold working requires interlayer annealing to eliminate residual stresses.
E-mail: garychen3215@hotmail.com
Address: No.35, Baoti Rd, Baoji city, Shaanxi Province, China
Contact: Mr. Gary Chen
Phone: +86-917-8883215
Mobile/WhatsApp: +86 13092900605
