Method and system for enhancing rivetability

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United States of America Patent

PATENT NO 9957584
SERIAL NO

14822323

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A joined sheet stack and a method and system for forming the stack are disclosed. The stack may include a steel sheet and a second sheet. The steel sheet may include a bulk portion having a first tensile strength and one or more fastener regions having a second tensile strength that is lower than the first tensile strength and a microstructure that includes tempered martensite. A fastener may extend through each fastener region joining the steel sheet to the second sheet. The method may include heat treating one or more regions of a steel sheet to form one or more fastener regions having a tensile strength that is lower than a bulk tensile strength of the steel sheet and a microstructure that includes tempered martensite. A fastener may then be inserted into the one or more fastener regions to join the steel sheet to a second sheet.

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Patent Owner(s)

Patent OwnerAddress
FORD MOTOR COMPANYMICHIGAN USA GUANGZHOU DEERE BYRNE MEI-LI JIAN ROAD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Campbell, Aindrea McKelvey Beverly Hills, US 30 31
Chiriac, Constantin Windsor, CA 12 4
Huff, Garret Sankey Ann Arbor, US 21 6
Sohmshetty, Raj Canton, US 22 31

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