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Title:
HIGH-STRENGTH BOLT
Document Type and Number:
Japanese Patent JP2016050605
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high-strength bolt having a necessary strength and excellent in delayed fracture resistance.SOLUTION: A high-strength bolt 1 has a tensile strength of 1500 MPa or higher, and a compressive residual stress of 100 MPa or higher is applied to at least one of an underhead lower fillet section 1a and a root lower radius section 1b. The high-strength bolt 1 comprises steel consisting of 0.50 mass% or higher of carbon, 1.5 mass% or higher of silicon, 1.0 mass% or higher of chromium, and 1.6 mass% or higher of molybdenum with balance of iron and inevitable impurities.SELECTED DRAWING: Figure 1

Inventors:
HAMADA TAKAHIRO
Application Number:
JP2014175456A
Publication Date:
April 11, 2016
Filing Date:
August 29, 2014
Export Citation:
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Assignee:
NISSAN MOTOR
International Classes:
F16B31/06; C22C38/00; C22C38/34; F16B33/06; F16B35/00
Domestic Patent References:
JP2006131990A2006-05-25
JP2011058576A2011-03-24
JPS5329779B21978-08-23
JP2003130024A2003-05-08
JP2001247937A2001-09-14
JPS5142856A1976-04-12
JP2006291295A2006-10-26
JP2011122674A2011-06-23
Attorney, Agent or Firm:
Janggi Motonori