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## 3. Precision Fasteners, High-Strength Shafts and Pin Components
Including high-load engine tie rods, locating pins, small transmission shafts and custom high-strength bolts in accessory gearbox assemblies.
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> Limitation reminder:
> Performance degradation occurs under continuous service temperature above 400°C. Therefore, 18Ni300 components are restricted to cold zones of aero engines and cannot be applied to hot-end parts such as turbine blades, combustors and turbine disks.
18Ni300 maraging steel powder, processed mainly by laser powder bed fusion (SLM), elevates the overall performance of aero-engine cold-section components through material intrinsic properties and additive manufacturing design freedom.瑞拓美新材料
## 3. Precision Fasteners, High-Strength Shafts and Pin Components
Including high-load engine tie rods, locating pins, small transmission shafts and custom high-strength bolts in accessory gearbox assemblies.
1. **Boosts load-bearing capacity and impact resistance**
After aging heat treatment, 18Ni300 reaches ultra-high tensile strength above 2000 MPa while retaining good fracture toughness. Aero-engine accessories such as mount brackets and tie rods endure violent vibration, shock and alternating inertia loads during takeoff, cruise and shutdown. The material resists sudden brittle fracture under peak loads and improves structural safety margin.
2. **Minimizes thermal distortion and stabilizes dimensional precision**
Unlike traditional hardened steel, 18Ni300 hardens via intermetallic precipitation rather than Aging treatment induces nearly negligible dimensional change. For high-precision valve bodies, actuator housings and locating pins, this characteristic keeps tight tolerances, reduces post-processing rework and scrap, and maintains consistent fit clearance during long engine operation.
3. **Enhances fatigue life under cyclic vibration**瑞拓美新材料
18Ni300 Spherical PowDer High Density PrinteD Parts