INTEGRATED MEMBER AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2012/026587

A1

[Problem] To provide an integrated member and manufacturing method therefor that make it possible to: decrease manufacturing costs by reducing the number of manufacturing steps needed to obtain an integrated member comprising members that have mutually differing required characteristics and are welded together into a single unit; and increase yield by minimizing cracks and the like upon welding. [Solution] An integrated member and a manufacturing method therefor, said integrated member being obtained through the following steps: an electric resistance welding step (S2) in which a shaft component (3) is made from a member that has a higher carbon content than an annular component (2), and while the shaft component (3) is being pressed into the annular component (2), a current is run through the contact area, thereby integrating the shaft component (3) and annular component (2) together via electric resistance welding; and a carburized-layer formation step (S4) in which carburized layers are formed on the shaft component (3) and annular component (2), in accordance with the characteristics required of each component, by either carburizing or carbonitriding the integrated member obtained in the electric resistance welding step (S2) and then quenching and tempering said integrated member.

HAMAMOTO TOSHIKAZU (JP)
DOI YASUYUKI (JP)

PCT/JP2011/069312

March 01, 2012

August 26, 2011

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FCC KK (JP)
HAMAMOTO TOSHIKAZU (JP)
DOI YASUYUKI (JP)

B23K11/00; B23K11/34; B23K11/36; C21D1/06; C21D9/32; C23C8/20; F02N15/02

WO2006033316A1

2006-03-30

JPH0552211A	1993-03-02
JPS5974275A	1984-04-26
JPH06297143A	1994-10-25
JP2010071372A	2010-04-02

KOSHIKAWA, TAKAO (JP)
Takao Koshikawa (JP)

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