In aerospace manufacturing, landing gear and other high-load components are often made of martensitic stainless steel with hardness reaching HRC 50+. While providing excellent strength and toughness, such materials present significant machining challenges.
Difficulty
During cutting, the combination of high temperature and impact forces can easily generate micro-cracks on the surface. These cracks, though barely visible, may act as fatigue initiation sites and greatly reduce component lifespan and reliability.
Challenge
To ensure long-term service performance, multiple countermeasures are required:
Low-heat cutting: Optimize tool geometry and machining parameters to minimize thermal input;
Coolant filtration system: Maintain clean coolant to effectively remove heat and prevent thermal damage;
Stress-relief polishing: Apply fine polishing techniques to reduce residual surface stresses and suppress crack initiation.
The integration of these methods significantly lowers the risk of surface micro-cracks in high-hardness stainless steel, ensuring stable and reliable quality for critical aerospace components.
