Martensitic stainless steels, commonly used in landing gear and load-bearing structural components, can reach extremely high hardness levels (HRC 50+). While their strength is essential, it also makes them highly prone to surface micro-cracks during machining due to cutting heat and impact forces-posing a hidden risk for fatigue failure.
The Challenge
Machining hard martensitic stainless steel efficiently without introducing micro-cracks requires managing surface integrity under harsh thermal and mechanical loads:
High hardness and brittleness-elevated temperatures and mechanical impact can crack the surface unexpectedly.
Fatigue risk-micro-cracks can initiate in surface stress concentrations, leading to crack propagation over time.
Our Solution Strategy
Low-Thermal-Input Cutting
Utilizing ultra-fine, sharp tools and conservative cutting parameters to minimize heat generation.
Clean Coolant Filtration
Filtering cutting fluids to eliminate debris and maintain cooling efficacy while preventing abrasive wear on the surface.
Precision Polishing for Stress Relief
Employing ultra-fine polishing (e.g., low-plasticity burnishing or cryogenic finishing techniques) to introduce compressive residual stresses and eliminate micro-fissures.
Impact Outcome
Virtually no detectable micro-cracks post-machining.
Improved surface fatigue strength due to controlled residual stress profiles and minimized surface damage.
Enhanced component lifespan and safety, critical for aerospace high-demand environments.
