Thermal Stability and Fatigue Resistance Verification of Intelligent Wearing Micro Screws
2026,08,28
Operating Conditions: In scenarios such as automotive hot stamping and aerospace component forming,
Intelligent Wearing Micro Screws must withstand repeated temperature cycles from -40℃ (low-temperature storage) to 300℃ (hot stamping). Thermal expansion and contraction easily lead to material fatigue cracks and dimensional deformation.
Test Methods: A high-low temperature alternating test chamber is used to simulate temperature cycles (e.g., -40℃/1h → heating to 300℃/2h → cooling to room temperature/1h, 50 cycles), while simultaneously monitoring the surface temperature distribution and internal stress changes of the Intelligent Wearing
Micro Screws.
Evaluation Indicators: Thermal fatigue crack length, surface hardness change rate (≤5% is acceptable), dimensional deviation (≤0.02mm).
Material Selection: Hot-work Intelligent Wearing Micro Screws steels such as H13 and SKD61, which have excellent thermal stability, are preferred due to their outstanding high-temperature strength and resistance to thermal fatigue.
Surface Treatment: Surface hardness and oxidation resistance are improved through nitriding and PVD coating (e.g., TiAlN).
Structural Optimization: Embedded cooling channels are designed to reduce the temperature gradient and minimize thermal stress concentration.
