Sintered Titanium Filter for Precision Filtration

● High strength and light weight
Density is only 4.5g/cm³, strength is 40%-50% higher than steel, suitable for aircraft skeleton, automotive connecting rod and other weight reduction scenarios.

● Excellent corrosion resistance
Resistant to strong acid, alkali, seawater corrosion, life expectancy of 3-5 times that of stainless steel, used in chemical pipelines, seawater desalination equipment.

● Biocompatibility
No rejection with human tissue, used in artificial joints, dental implants, pacemaker shells.

● High temperature performance
Working temperature up to 540 ℃ (TA19), suitable for aircraft engine blades, nuclear power cooling system.

● Multi-functional processability
Support welding (TIG, electron beam welding), 3D printing (customized complex structural parts).

Aerospace： Engine compressor blades, fuselage skeleton, rocket fuel storage tanks.

Healthcare：Artificial joints, orthopedic screws, dental implants, cardiovascular stents.

Chemical Energy：Corrosion-resistant reactors, nuclear power plant cooling pipes, electrolyzer electrodes.

Marine Engineering：Marine Screws, Marine Engineering Marine propellers, deep sea probe housings, offshore platform support structures.

Automotive Manufacturing： Lightweight Automotive： Lightweight connecting rods, titanium exhaust systems, racing chassis components.

Sports Equipment： Golf clubs, bicycle frames, mountaineering buckles (high strength + lightweight).

The production process of sintered titanium filters involves a number of procedures, which need to be combined with raw material handling, melting, plastic processing and quality control, etc. The following is the integration and analysis of the standardized process:

First, raw material preparation
1. titanium sponge treatment
- As the core raw material, need to screen high-purity titanium sponge (Fe ≤ 0.30%, O ≤ 0.25%), some alloys need to add aluminum, molybdenum, niobium and other elements.
- Alloy ratio: such as β titanium alloy needs to be mixed by weight percentage (such as Mo 4-7%, Nb 4-6.5%, Al 1-4%).
2. Electrode preparation
- Titanium sponge and alloy powder are pressed into block electrode by hydraulic press, and welded into long electrode by ion welding.

Second, melting process
1. Vacuum self-consumption arc melting (VAR)
- In a vacuum or inert gas environment, the electrode is melted at 1700-1950 ℃ to remove impurities and form titanium ingots.
- Multiple melting: usually repeated 2-3 times to enhance compositional homogeneity (e.g., β-titanium alloy requires 3 melts).

Third, plastic processing
1. Forging and billeting
- Temperature control: Titanium ingot is heated to 950-1100℃ for open billet forging to break the cast organization and refine the grain.
- Multi-directional forging: Improve the organization uniformity by forging in different directions, and reduce the subsequent rolling deformation.
2. Roll forming
- Hot rolling: initial rolling at 900-1000 ℃ to form cylindrical blanks (such as 500mm diameter titanium rods).
- Cold rolling: finishing rolling at room temperature to improve the dimensional accuracy (e.g. thin-walled tubes, capillary tubes).
3. Special process
- Selection of die forging: open die forging with high loss (15-20% burr), closed die forging requires precise control of the volume of the blank.

Surface treatment and post-processing
1. Acid washing and cleaning
- Acid washing: use hydrofluoric acid - nitric acid mixture (acid concentration ≤ 6%) to remove the oxide skin, resulting in acid mist (G2) and waste acid residue (S5).
- Water washing: remove residual acid and grease, generate oily waste water (W1/W2).
2. Annealing and straightening
- Annealing: 700-800 ℃ annealing to eliminate internal stress, some alloys need to solid solution aging (such as 950 ℃ solid solution + 550 ℃ aging).
- Straightening: Correct the shape by straightening machine and generate noise (N5).

Quality control and testing
1. Composition and performance testing
- Chemical analysis: ICP spectrometer to detect impurities (e.g. Fe, O content). Mechanical test: tensile strength (Tensile strength).
- Mechanical test: Tensile strength (TA1: 240MPa, TC4: 895MPa), elongation, etc.
2. Non-destructive testing
- Ultrasonic flaw detection (UT): detect internal cracks, pores and other defects.

Finished product processing and packaging
1. Surface finishing
- Polishing (Ra≤0.8μm) or spinning treatment to enhance the finish.
2. Packaging and labeling
- Moisture-proof and shock-proof packaging, generating waste packaging materials (S8).

Small diameter (<10mm): medical devices, precision electrodes.

Medium diameter (10-100mm): chemical equipment, ship parts.

Large diameter (>100mm): nuclear power equipment, heavy machinery.

Avoid scratches and oil contamination, regularly clean with water or neutral detergent, corrosive environment need to test the surface condition every 2 years.

Raw material (titanium sponge) costs 60%, complex processes (e.g. vacuum melting) to enhance performance, but TC4 is about 30% higher than GR.1.

Corrosion resistance: Titanium has a life expectancy of 5 times that of stainless steel in a seawater environment.

Lightweight: 40%-50% less weight for the same strength.

Conventional environment: more than 20 years (e.g. building structure); Corrosive environment: 8-15 years (e.g. chemical pipeline).

Quality assurance: UT flaw detection (internal defect detection), chemical composition analysis (ICP spectrometer).

Customized service: support drawing processing, non-standard size customization (quotation within 72 hours).