ASTM B348 4mm 5mm 6mm 8mm 10mm 12mm 15mm Gr5 Ti6Al4V titanium rod

ASTM B348 4mm 5mm 6mm 8mm 10mm 12mm 15mm Gr5 Ti6Al4V titanium rod

Introduction of TC4 / Ti-6Al-4V titanium alloy

Heat treatment

After the solid solution strengthening treatment of mpa and TC4 materials, the strength does not increase much, which is 1100MPa, and the strength in the annealed state is generally 900MPa

Thermal expansion coefficient

TC4 titanium alloy has a series of advantages such as excellent corrosion resistance, small density, high specific strength, good toughness and weldability. It has been successfully applied in aerospace, petrochemical, shipbuilding, automobile, medicine and other departments .

Mechanical properties

Tensile strength σb / MPa ≥895, specified residual elongation stress σr0.2 / MPa ≥825, elongation δ5 (%) ≥10, section shrinkage ψ (%) ≥25

density

4.5 (g / cm3) working temperature 100-550 (℃)

chemical composition

TC4 contains titanium (Ti) balance, iron (Fe) ≤0.30, carbon (C) ≤0.10, nitrogen (N) ≤0.05, hydrogen (H) ≤0.015, oxygen (O) ≤0.20, aluminum (Al) 5.5- 6.8, Vanadium (V) 3.5-4.5

Titanium alloy classification
Titanium is an allotrope with a melting point of 1668 ° C. When it is lower than 882 ° C, it has a close-packed hexagonal lattice structure called alpha titanium; above 882 ° C it has a body-centered cubic lattice structure called beta titanium. Using the different characteristics of the above two structures of titanium, appropriate alloying elements are added to gradually change the phase transition temperature and phase content to obtain titanium alloys with different structures. At room temperature, titanium alloys have three matrix structures, and titanium alloys are divided into the following three categories: α alloys, (α + β) alloys, and β alloys. China is represented by TA, TC and TB respectively.

alpha titanium alloy

It is a single-phase alloy composed of α-phase solid solution. Whether it is at ordinary temperature or at a higher actual application temperature, it is α-phase, with stable structure, higher wear resistance than pure titanium, and strong oxidation resistance. At a temperature of 500 ℃ ~ 600 ℃, it still maintains its strength and creep resistance, but can not be strengthened by heat treatment, the strength at room temperature is not high.
Beta titanium alloy

It is a single-phase alloy composed of β-phase solid solution. It has high strength without heat treatment. The alloy is further strengthened after quenching and aging. The room temperature strength can reach 1372 to 1666 MPa; but the thermal stability is poor and it is not suitable for use at high temperatures. .

α + β titanium alloy

It is a two-phase alloy with good comprehensive properties, good organizational stability, good toughness, plasticity and high-temperature deformation properties, good hot-press processing, quenching and aging to strengthen the alloy. The strength after heat treatment is about 50% to 100% higher than that of the annealed state; the high temperature strength is high, it can work for a long time at a temperature of 400 ℃ to 500 ℃, and its thermal stability is inferior to the alpha titanium alloy.

Among the three titanium alloys, the most commonly used are α titanium alloy and α + β titanium alloy; α titanium alloy has the best machinability, followed by α + β titanium alloy, and β titanium alloy is the worst. The code name for α titanium alloy is TA, the code name for β titanium alloy is TB, and the code name for α + β titanium alloy is TC.

2. Physical Properties

3.Tolerance

Titanium rod processing Flow:

Titanium Sponge and master alloys → Compacting electrodes → Melting → Forging → Billets → Procision forging → Machining → Bars