Titanium wire drawing technology!

Core technology of titanium wire drawing (cold drawing)

1. Applicable materials

Pure titanium and titanium alloy wires such as TA1, TA2, and TC4 typically have diameters ranging from 0.1mm to 8mm.

II. Preparation before pulling

blank

Titanium coils, rods, and wires, after being turned/polished/pickled, have no cracks or oxide scales on the surface.

annealing

Vacuum annealing or argon-shielded annealing softens the grains, eliminates stress, and ensures drawability.

Surface Treatment

Acid pickling: remove oxide layer and contamination layer

Apply lubricant: saponified liquid, oil-based lubricant, special titanium wire drawing powder

III. Key points of the key pulling process

mold

Utilize more carbide molds and diamond molds, with strict control over mold angles and sizing bands, to ensure dimensional accuracy and surface finish.

Deformation amount per pass

Pure titanium: single-pass reduction ratio of 15% to 30%

Titanium alloys such as TC4: 10% to 20%

Excessive deformation can easily lead to wire breakage, galling, and cracking.

Pulling speed

Draw at a steady low to medium speed to avoid heating, oxidation, and mold sticking.

Multi-pass drawing

Rough drawing → Medium drawing → Fine drawing → Precision drawing

Annealing must be performed in between every 2 to 5 passes to restore plasticity.

IV. Intermediate annealing (determining whether it can be drawn thin without breaking)

Temperature: 600~750℃

Atmosphere: vacuum / argon shielding, strictly avoid oxidation

Purpose: To eliminate work hardening and prevent brittle fracture and surface cracks

V. Fine drawing and finished product processing

Fine drawing / Precise drawing

Small deformation, high-gloss mold, control of diameter tolerance, roundness, and straightness.

Finished product annealing

Soft / semi-hard / hard, with mechanical properties adjusted according to customer requirements.

Surface Treatment

Acid pickling: silver-white matte finish

Polishing: Achieving a shiny surface

Cleaning, drying, winding, packaging

VI. Common quality control

Surface: Free from burrs, scratches, cracks, and oxidation discoloration

Dimension: Tolerance up to ±0.01mm or higher

Performance: strength, elongation, winding performance, and corrosion resistance meet the standards

Non-destructive: no hydrogen embrittlement, no internal defects