Product Introduction
Gr.2 milling rod is a specialized rod made of industrial pure titanium, which is the core raw material for producing high-purity spherical titanium powder using processes such as plasma rotating electrode method. This product is known for its extremely high chemical purity, excellent plasticity, stable microstructure, and precise geometric dimensions, making it an ideal base material choice for advanced manufacturing fields such as metal injection molding (MIM), additive manufacturing (3D printing), powder metallurgy (PM), etc. Gr.2 powder is widely used in medical devices, oral implants, chemical corrosion-resistant parts, and high-end consumer goods manufacturing due to its excellent biocompatibility, corrosion resistance, and good comprehensive performance.
Production process
The production of Gr.2 powder bars adheres to the concept of high purity and precision, and the main steps include:
1. Raw materials: Selected high-quality grade 0 sponge titanium to ensure high purity at the source.
2. Electrode pressing: Sponge titanium is pressed into a dense electrode block under high pressure.
3. One time melting (VAR melting): Welding electrode blocks into consumable electrodes and conducting the first melting in a vacuum consumable arc furnace to form ingots, which can effectively remove volatile impurities and gases.
4. Secondary melting: Use the ingot melted once as an electrode for secondary VAR melting to further purify the metal, eliminate chemical composition segregation, and obtain ingots with highly uniform composition.
5. Forging: Ingots are forged at appropriate temperatures to break down coarse cast structures, refine grains, and improve material density.
6. Rolling and Drawing: The forging blank is processed to near the target diameter through hot rolling or cold drawing processes, and its microstructure is improved.
7. Heat treatment: Perform recrystallization annealing treatment to fully eliminate internal stress, homogenize the structure, and restore the plasticity of the material.
8. Precision machining and polishing: A precision centerless grinder is used to perform final dimensional precision machining on the bar, ensuring that the diameter tolerance and straightness meet extremely high requirements, and obtaining a smooth mirror like surface.
9. Non destructive testing and cleaning: Perform ultrasonic testing to ensure that there are no defects inside. Finally, after strict cleaning and drying, it is ready for packaging.
Product parameters
|
parameter category |
Detailed indicators |
|
Material Grade |
Gr.2 (CP Ti Grade 2, UNS R50400, GB TA2) |
|
chemical composition |
Compliant with ASTM B348, ASTM F67 and other standards Ti: residual (≥ 99.2%) N: ≤ 0.03% C: ≤ 0.08% H: ≤ 0.015% Fe: ≤ 0.30% O: ≤ 0.25% |
|
physical state |
Annealed state+polished state |
|
Common diameters |
Φ65mm, Φ70mm, Φ75mm, Φ100mm (can be customized according to customer needs) |
|
diameter tolerance |
± 0.05mm (higher accuracy can be provided upon request) |
|
length |
500mm -1500mm or customized length |
|
straightness |
0.5mm/m |
|
surface roughness |
Ra ≤ 0.8 μ m (precision centerless polishing) |
|
Uniformly transformed microstructure with β - transformation |
Uniform equiaxed alpha grain structure |
|
mechanical properties |
Tensile strength: ≥ 345 MPa Yield strength: ≥ 275 MPa Elongation rate: ≥ 20% |
|
Certification and Standards |
Can provide melting furnace number, chemical composition report, mechanical performance report, and comply with ASTM, ISO, GB, and medical device related standards |
Product transportation and packaging
To ensure that the surface of the titanium rod is free from contamination, scratches, and moisture absorption, we strictly package.
Cleaning: The bars are cleaned and dried in a clean environment to ensure that the surface is free of any contaminants.
Packaging: Each cleaned rod is individually wrapped to prevent contamination and damage during transportation and storage.
External identification: Clear product information (name, specifications, batch number, furnace number), moisture-proof, impact resistant and other prompts are clearly marked on the outside of the packaging box.
Transportation and storage: Land or air transportation, keep the environment dry. The product should be stored in a clean, dry, and non corrosive gas warehouse.
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