Traditional aerospace secondary landing gear components primarily rely on casting for forming. Cast parts often exhibit surface defects such as gas pores, shrinkage cavities, and cracks, which require post-processing and may compromise the product’s physical properties or even render it unusable. Cast components suffer from lower mechanical strength, inferior surface quality, coarse grains, and porous structures, necessitating additional machining processes. The casting process inevitably results in rough and uneven surfaces, making them unsuitable for specific finishing treatments. Additionally, casting demands high-performance mold materials, leading to elevated mold manufacturing costs. The use of chemical substances and high-temperature heating equipment in casting may release harmful substances, contributing to environmental pollution. Furthermore, the high energy consumption in casting production risks wasteful utilization of energy resources. The safety performance evaluation of molds and mold bases is a critical step to ensure their safety and reliability during use. The assessment covers structural safety, material safety, and the safety of heat treatment processes. Through this evaluation, potential safety hazards can be promptly identified, and corresponding measures can be implemented for improvement.

In the material selection for mold bases, 5CrNiMo forged steel is typically employed due to its high strength, excellent heat resistance, and superior wear resistance. The 5CrNiMo material demonstrates outstanding mechanical properties that fulfill the operational requirements of mold bases during high-pressure casting processes. Furthermore, its exceptional machinability and heat treatability ensure both precise manufacturing quality and extended service life of the mold components.

For this material composition, we strictly control normalizing & tempering parameters along with quenching time/temperature to ensure uniform material hardness. This guarantees the material performance meets mold base cycle requirements. A mature process road map has been established to ensure product quality consistency.

Utilizing specialized abrasive papers with rigorous thickness verification and service life evaluation. Through professional operator training, we implement precision surface grinding and polishing processes.

Equipped with imported SIRUI coordinate measuring machines (CMM) to perform comprehensive surface inspections. This ensures positional accuracy meets design specifications while maintaining full-curvature profile compliance.