LASER HEAT-TREATED SHAFT AND METHOD OF MAKING THE SAME
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United States of America Patent
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Jul 18, 2019
app pub date -
Jan 15, 2018
filing date -
Jan 15, 2018
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Abstract
A method for laser-hardening a shaft for a vehicle includes applying laser light energy in a repeating pattern to a journal surface. The method further includes, responsive to the repeating pattern being applied completely around the shaft, applying laser light energy to the surface in a pattern different than the repeating pattern to form an overlap surface pattern that defines a tapered ramp having a corresponding hardness less than a hardness corresponding to the repeating pattern alone.
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