Analysis Of Wear Resistance Strengthening Technology For Titanium Rods And Titanium Wires

The defects of titanium materials include low surface hardness, high friction coefficient, poor wear resistance, and severe adhesive wear. The titanium materials restrict their application under high-friction and high-load working conditions.

 

 

1.1 Root Causes of Poor Wear Resistance of Titanium Materials

Titanium is highly chemically active. It tends to bond with contact materials and create transfer layers in friction processes, leading to increased wear. Its hexagonal close-packed crystal structure results in weak plastic deformation at room temperature and difficulty in surface hardening. It also shows a high friction coefficient, rapid wear, and susceptibility to fretting wear, reducing component service life and connection stability.

 

1.2 Core Principles of Wear Resistance Strengthening

Prepare a high-hardness surface layer to resist deformation and abrasive wear.

Construct a lubricated or smooth surface to suppress adhesive wear.

Achieve metallurgical bonding between the strengthened layer and the substrate to prevent peeling and spalling.

Keep the mechanical properties of the substrate to ensure load-bearing capacity.

 

 

2.1 Thermochemical Treatment Strengthening Technology

Technical Highlights: Ion carburizing accelerates carbon ion penetration via an electric field, suitable for slender parts such as titanium wires. Plasma nitro‑oxiding optimizes toughness of the permeated layer at the optimal temperature of 750 °C, avoiding brittleness defects of pure nitriding.

 

2.2 Surface Coating Strengthening Technology

Hard coatings are deposited on the surface of titanium materials through physical or chemical methods to rapidly improve wear resistance, adapting to various working conditions.

 

2.2.1 Physical Vapor Deposition (PVD)

Prepare nanocomposite coatings such as TiN and TiAlN with high hardness, significantly reducing friction coefficient and wear rate.

Dense golden TiN coatings combine wear resistance and decorativeness, suitable for medical and precision parts.

Combined with laser texturing composite modification, substrate hardness and wear resistance can be significantly improved.

 

2.2.2 Chemical Vapor Deposition (CVD)

Hard coatings such as DLC are deposited via high-temperature chemical reactions, featuring ultra‑high hardness, extremely low friction coefficient, and resistance to wear and chemical corrosion, mostly used in precision machinery and biological implants.

 

2.2.3 Thermal Spraying and Laser Cladding

Prepare metal‑matrix composite coatings with strong impact resistance and high wear resistance.

Clad composite coatings and in‑situ generate ceramic strengthened phases with stable performance under high and low temperatures.

Dope self‑lubricating components to achieve integrated wear resistance and friction reduction.

 

2.3 Oxidation Strengthening Technology

2.3.1 Micro‑Arc Oxidation (MAO) / Plasma Electrolytic Oxidation (PEO)

High‑voltage discharge of titanium materials in electrolyte forms a 5–20 μm in‑situ titanium dioxide ceramic film, enhancing hardness, wear resistance, and corrosion resistance. Optimized electrolyte can precipitate hard phases for further performance strengthening.

 

2.3.2 Anodizing

Simple process to electrochemically form an oxide film, combining surface strengthening and colorful decoration, suitable for functional + decorative scenarios.

 

2.4 Mechanical Strengthening and Composite Treatment Technology

2.4.1 Surface Nanocrystallization

Refine surface grains to nanoscale through mechanical refinement, laser shock peening, etc., improving hardness and wear resistance while retaining substrate toughness. Composite processes can also achieve integrated hydrophobicity and corrosion resistance.

 

2.4.2 Surface Texturing

Stores oil to form films, traps abrasive particles, and reduces contact friction, effectively lowering wear.

 

2.4.3 Composite Strengthening Technology

Nitro‑oxiding + laser remelting: prepare gradient permeated layers to balance hardness and toughness.

Laser texturing + PVD coating: synergistic effect to greatly reduce wear.

Micro‑arc oxidation + electroless Ni–P plating: ceramic layer matched with metal coating to improve impact resistance and wear resistance.

 

 

3. Differentiated Applications of Wear Resistance Strengthening Technologies

3.1 Technology Selection for Titanium Rod Strengthening

Plasma nitriding + laser remelting: high hardness, low deformation, greatly improved wear resistance.

Nitro-oxiding: combining wear resistance and corrosion resistance.

Micro-arc oxidation + DLC coating: biocompatible and low friction.

Carburizing + tungsten carbide thermal spraying: high temperature resistance and abrasive wear resistance.

 

3.2 Key Points of Titanium Wire Strengthening Technology

Titanium wires have small diameter, large aspect ratio, and are prone to deformation, requiring dedicated adaptive processes:

Ion carburizing: small deformation, uniform hardened layer.

PVD coating: thin and flexible, suitable for precision medical and spring titanium wires.

Micro-arc oxidation: uniform film formation, mostly used in biomedical scenarios.

Nitriding + laser shock peening composite treatment: improve fatigue and wear resistance of aerospace titanium wires.

 

4. Technology Comparison and Selection Strategy

Thermochemical treatment: strong bonding, suitable for mass production, but high temperature and long cycle.

PVD/CVD coating: diverse processes, high cost, weak impact resistance.

Micro‑arc oxidation: low cost, eco-friendly, suitable for mass production, low upper hardness limit.

Laser cladding: extremely high wear resistance, expensive equipment, only for customization.

Composite process: excellent comprehensive performance, complex process, relatively high cost.

 

Selection Principles: Match actual working conditions, balance performance and cost, adapt to workpiece structure and size, prioritize mature processes to ensure stable quality.

 

Ruihang, a direct titanium manufacturer and supplier, is looking forward to cooperating with you. Email:Sam.Rui@bjrh-titanium.com