Landing gear are made of high strength metals such as 300M steel. They have complex shapes with significant variation in section thickness due to the collection of bosses, lugs, beam sections, and lube sections that comprise the part. During quench hardening, distortion becomes an important issue due to large thermal gradients and the consequent differences in timing of phase transformations. Due lo the size and cost of these parts, experimental investigation of these quench process parameters quickly becomes cost prohibitive, with simulation now being the tool of choice for understanding and minimizing distortion.
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