US 11,885,001 B2
Manufacturing method of metal member with residual stress
Yuta Saito, Nagoya (JP)
Assigned to SINTOKOGIO, LTD., Nagoya (JP)
Filed by SINTOKOGIO, LTD., Nagoya (JP)
Filed on Sep. 30, 2022, as Appl. No. 17/957,295.
Claims priority of application No. 2021-163888 (JP), filed on Oct. 5, 2021.
Prior Publication US 2023/0103386 A1, Apr. 6, 2023
Int. Cl. C22F 1/04 (2006.01)
CPC C22F 1/04 (2013.01) 8 Claims
OG exemplary drawing
 
1. A manufacturing method of a metal member with residual stress, the manufacturing method comprising:
plastically deforming the metal member to refine crystal grains of the metal member;
heating the metal member so as to maintain the refined state of the crystal grains to release residual stress of the metal member after the crystal grains of the metal member are refined; and
performing a laser peening, a cavitation peening, a water jet peening, or a low plasticity burnishing (LPB) to apply residual stress to the metal member after the the metal member is heated.