Wear-resistant material selection—choosing coatings based on failure modes (Source: sputtek): Golden Rule: PVD for precision thin hard films and DLC for low friction (Source: sputtek); Core Factors: Hardness + friction coefficient (Source: Oerlikon)—Note: Use HVOF or laser cladding for thick coatings (Source: Engineering Niche).
I.
PVD Coatings
PVD: Physical Vapor Deposition, 0.5–5 μm (Source: Oerlikon); Function: Increased hardness + low friction coefficient (Source: Oerlikon); Precision: Suitable for precision geometric components (Source: sputtek); Low Temperature: PECVD <150°C; does not damage the substrate (Source: Entegris); Service Life: Extends component lifespan (Source: Oerlikon)—PVD: 0.5–5 μm (Top choice for precision applications).
II. Coating Comparison
TiN: HV 2000–2500, ~550°C, cutting tools (Source: Rapid); TiAlN: HV 2800–3500, ~800°C, high-speed dry cutting (Source: Rapid); DLC: HV 2000–5000, ~300–400°C, low friction (Source: Rapid); CrN: HV 1800–2200, ~700°C, stainless steel forming (Source: Rapid); Diamond: Hardness exceeds tool steel/chrome (Source: Entegris)—Coatings: TiN/TiAlN/DLC/CrN (choice of four).
III. Thick Coatings
HVOF: Carbides (WC-Co/CrC-NiCr) (Source: Engineering);
Laser Cladding: 0.5–5 mm, metallurgical bond, repairable (Source: Engineering); Heavy Impact: For heavy impact and severe wear (Source: Engineering); Cold Spray: Suitable for heat-sensitive materials (Source: Meccanica); Selection: Thick, dense barrier against erosion (Source: Sputtek)—Thick coatings: HVOF + Laser Cladding (heavy-duty applications).
IV. Wear-Resistant Metals
AR Steel: Abrasion-resistant steel (martensitic/bainitic) (Source: CMS);
Tool Steel: Carbides (Cr/V/Mo), wear resistance with toughness (Source: CMS); Copper Alloys: Bronze/aluminum bronze, anti-galling (Source: CMS); Quenching: Pin/shaft quenching depth and hardness gradient (Source: Zhongcheng); Salt Bath Nitriding: Bushings, high-hardness layer with tough core (Source: Zhongcheng)—Metals: AR Steel + Tool Steel + Bronze (inherent wear resistance).
V. Engineering Plastics
UHMWPE: Ultra-high molecular weight, sliding wear resistance (Source: CMS); PA (Nylon): Self-lubricating bearings (Source: CMS); iglide: Friction-optimized polymer (Source: igus); Lubrication-free: No additional components required (Source: igus); Low temperature: Temperature-sensitive substrates (Source: Meccanica)—Plastics: UHMWPE/PA (sliding, light load).
VI.
Surface Treatments
Anodizing: Hard anodizing of aluminum into aluminum oxide (Source: Prolean); Shot peening: Strengthening via shot peening (Source: 24Chemical); Carburizing: Surface hardening; Composite: Composite surface treatment to optimize friction and corrosion resistance (Source: Zhongcheng); Selection method: Test samples first to verify adhesion (Source: Sputtek)—Surface: Anodizing + Shot peening (common for aluminum parts).
VII.
Procurement Recommendations
First, identify failure mode (abrasive/adhesive/erosive); second, select coating (PVD/DLC/HVOF); third, determine substrate (AR steel/bronze); fourth, verify temperature (coating’s maximum temperature limit);
fifth, prepare samples (to verify adhesion)—Wear-resistant material selection: Failure mode + Coating + Temperature (three-factor closed loop).
