Hollow element manufacturing method and rotary machine manufacturing method
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United States of America Patent
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Nov 17, 2020
Grant Date -
Feb 1, 2018
app pub date -
Oct 16, 2015
filing date -
Feb 18, 2015
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Abstract
A method of manufacturing a hollow element which has an internal space and of which the internal space is cryogenically used, the method comprising a base material forming step of forming a base material which has a space to serve as the internal space; a filling step of filling the internal space of the formed base material with fluid having a temperature equal to or lower than a temperature at which the base material is subjected to solid-phase transformation and causing the base material to be subjected to the solid-phase transformation; and a finishing step of finishing the base material after the base material is subjected to phase transformation.
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