Heavy machinery operating in mining, metallurgy, and construction environments faces extreme wear, high impact, and dust-heavy conditions. The wear resistance of critical components directly affects equipment lifespan, operational efficiency, and maintenance costs. Durable Wear Strips and Plated Components serve as core protective solutions. By optimizing materials and surface treatments, they provide long-term protection for key friction and impact points, significantly enhancing machinery durability and reliability.

1. Wear Strips: “Hard Rails” for Heavy-Duty Friction

Wear strips are bar-shaped components designed to withstand sliding, impact, and abrasive wear. Typically manufactured with composite structures and specialized processes, they balance high hardness, toughness, and impact resistance, meeting the wear requirements of different heavy machinery components.

1.1 Core Material Systems

• High-Alloy Wear-Resistant Steel: NM450/NM600 series or ZGMn13 high-manganese steel, heat-treated to HRC 45–65. ZGMn13 can self-harden under impact to HRC 55–80, ideal for crusher plates, scraper conveyor troughs, and other high-impact zones.

• Cemented Carbide Composite Strips: Carbon steel base with tungsten carbide or Cr-Mo alloy overlay, hardness HRC 55–65, 10–20× more wear-resistant than ordinary steel. Applied in excavator teeth, loader blades, and mining chutes.

• Ceramic-Based Composite Wear Strips: Aluminum oxide or silicon carbide particles bonded with metal matrix, hardness HV 1800–2500, excellent resistance to abrasive dust in cement and metallurgical environments.

1.2 Key Manufacturing Processes

• Overlay Welding: Automatic arc or plasma welding deposits 3–20mm thick wear layers with vertically aligned carbides, enhancing wear efficiency.

• Laser Cladding: Produces 0.5–3mm metallurgically bonded layers, HRC 45–62, crack-free and ideal for precision or complex-shaped wear strips.

• Structural Design: Trough wear strips with raised patterns convert “full-surface friction” into “rail-like sliding,” reducing contact area and wear rate by 3–5×.

1.3 Typical Applications

Used in sliding rails, friction pairs, and impact surfaces: scraper conveyor troughs, excavator tracks, crusher jaws, metallurgical chutes, and heavy machinery support rollers. They directly resist abrasive materials, mud, and ore impact fatigue.

2. Plated Components: “Protective Armor” for Precision Parts

Plated components form micro- to millimeter-thick protective layers via physical/chemical deposition or thermal spraying. They provide high hardness, low friction, and strong adhesion, integrating wear resistance, lubrication, and corrosion protection—perfect for precision, thin-walled, or complex components.

2.1 Main Plating Types and Properties

2.2 Core Manufacturing Processes

• PVD Physical Vapor Deposition: Low-temp (<500°C) dense coatings, ideal for precision parts.

• Thermal Spraying (Plasma/Flame): Produces thick wear layers for large, rough components; lifespan increased 3–5×.

• Laser Cladding Plating: Metallurgically bonded, porosity-free, impact-resistant; used for shaft surfaces, flanges, and worn part refurbishment.

2.3 Typical Applications

Applied on precision friction pairs, thin-walled components, and corrosion-resistant surfaces: hydraulic pistons/cylinders, flow plates, gears, bearings, valves, and pump sealing surfaces. Reduces friction and wear under high pressure, high speed, or poor lubrication, enhancing system reliability.

3. Performance Requirements and Standards

3.1 Key Performance Indicators

• Hardness: Wear strips HRC 45–65, plated layers HV 1200–3000.

• Adhesion: Plating ≥4B (cross-hatch), critical load ≥20N; wear strips must maintain metallurgical bonding, crack-free.

• Wear Resistance: ASTM G65, ISO 1518; abrasion ≤1×10⁻⁶ mm³/(N·m), Taber ≥5000 cycles/μm.

• Impact Toughness: Wear strips withstand falling sand and impact tests; coatings resist thermal cycling and mechanical shocks.

3.2 Industrial Value

Using wear strips and plated components can increase key part lifespan 3–8×, reduce maintenance frequency by over 70%, minimize unplanned downtime, and cut operational costs 40–60%, supporting lightweight, long-life, and efficient heavy machinery.