Title:
PISTON FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2023172618
Kind Code:
A
Abstract:
To provide a piston for an internal combustion engine and a manufacturing method thereof capable of keeping excellent sealing performance of an anodic oxidation film formed on an inner face of a top ring groove and a piston ring, even when a material of high strength is used as a piston base material.SOLUTION: A laser beam is applied to an outer peripheral surface 39 of a piston material 30a prepared by using an aluminum alloy containing 5.0-20.0 mass% of Si, more than 1.3 mass% and 5.0 mass% or less of Cu, and more than 1.5 mass% and 3.5 mass% or less of Ni as a base material to form a remelting rapidly solidified portion or a silicon dispersion layer 40 in which silicon is dispersed more finely in comparison with the base material. The silicon dispersion layer is cut out to form a top ring groove 33 on the silicon dispersion layer, and an anodic oxidation film 60 is formed on its inner surface. A processing speed of the laser beam is determined within a range of 2,000-10,000 mm/min, and the irradiation of the laser beam is performed only by one round of the outer peripheral surface of the piston material.SELECTED DRAWING: Figure 4
Inventors:
FUJITA MASAHIRO
Application Number:
JP2022084556A
Publication Date:
December 06, 2023
Filing Date:
May 24, 2022
Export Citation:
Assignee:
SUZUKI MOTOR CORP
International Classes:
F02F3/00; C25D11/04; C25D11/16; F02F3/10; F16J1/01; F16J9/00
Attorney, Agent or Firm:
Shoichi Okuyama
Ayako Nakamura
Soji Morimoto
Yu Tanaka
Kunitoshi Takuma
Miho Amiya
Kohei Arihara
Ayako Nakamura
Soji Morimoto
Yu Tanaka
Kunitoshi Takuma
Miho Amiya
Kohei Arihara