Products Description
I. Product Characteristics
GR4 is an alpha-type titanium alloy with excellent high-temperature strength and corrosion resistance, and plays an important role in many fields. It has a slightly higher tensile strength than industrially pure titanium and can be used as a structural material in the medium strength range, so it is often used as welding wire.GR4 titanium wire is available in a wide range of sizes, with common product specifications including diameters ranging from 0.1mm to 6mm in different sizes and dimensions.Depending on the specific needs of the application, titanium wire can be customized to a variety of diameters and lengths.
1. low density and high strength, its density is 4.43g/cm3. relative to steel, its density is only about half, so it has the characteristics of lightweight.
2. Good corrosion resistance, can have good corrosion resistance in oxidizing, neutral and reducing media.
3.GR4 has excellent mechanical properties, specifically for high strength, high toughness and good fatigue resistance. Its tensile strength can reach more than 1100MPa, belongs to the high strength alloy.
4.Good ductility and toughness, can maintain good mechanical properties at high temperatures. In addition, it also has good creep resistance and anti-stress relaxation properties, suitable for working in high temperature and high stress environment occasions
II. The production process
1. Hot rolling process
-Hot rolling temperature: control at 800～900℃ (α+β phase area), to avoid too high a temperature resulting in coarse grains, or too low to cause work hardening.
-Rolling passes: adopt multi-pass rolling, each pass deformation of 10% to 20%, the total deformation ≥ 60%, and gradually rolled into a thickness of 10-20mm hot-rolled plate.
-Intermediate annealing: If the rolling process is obvious work hardening, need to carry out intermediate annealing (650 ~ 750 ℃, insulation 1 ~ 2 hours), to remove stress and restore plasticity.
2. Cold rolling and finishing
Cold Rolling Pre-treatment: The hot rolled plates need to be surface treated to remove the oxidized skin (commonly used pickling process: hydrofluoric acid + nitric acid mixture), or mechanically sandblasted to remove surface defects.
Cold rolling temperature: at room temperature, the thickness is precisely controlled by multi-roll mill (e.g. 20-roll Sengemeier mill), and rolled into titanium coils of 0.5-4mm.
-Deformation control: the single cold rolling deformation is usually 15% to 30%, and the total deformation is adjusted according to the final performance requirements (e.g. ≥50% deformation for high strength).
Intermediate annealing and degreasing: recrystallization annealing (600-700℃, holding time 0.5-1 hour) is carried out as needed during cold rolling to eliminate work hardening and refine grain size.
Before annealing, degreasing treatment (organic solvent cleaning) is required to avoid oil contamination of the surface at high temperature.
III. Areas of application
- In the aerospace field, it is used to manufacture aircraft structural parts, engine parts and aerospace equipment.
- In the field of shipbuilding, it is used to manufacture hull structural parts and ship equipment.
- In the field of chemical industry, it is used to manufacture chemical equipment, storage tanks and reactors.
- In the field of medical devices, it is used in the manufacture of artificial joints, dental implants and surgical instruments, etc.
Hot Tags: gr4 titanium coil, China gr4 titanium coil manufacturers, suppliers, factory, titanium bolts, titanium rod price, titanium plate, titanium products, ti bolts, titanium pipe suppliers
