Title:
【発明の名称】棒状製品、シリンダーロッド、液圧シリンダー、及びその製造方法
Document Type and Number:
Japanese Patent JP2003522836
Kind Code:
A
Abstract:
A bar product prepared from microalloyed bar steel is provided. The bar product is prepared by hot rolling and heat treating a microalloyed bar steel. The hot rolled and heat treated microalloyed bar steel is prepared by steps of hot rolling a preform of the microalloyed bar steel at a temperature of between about 1,400° F. and about 2,200° F. to provide a steel bar having a diameter of between about ¾ inch and about four inches, cooling the steel bar to provide a surface temperature of below about 1,100° F., and heat treating the steel bar in an environment having a temperature of between about 500° F. and about 1,300° F. The bar product is preferably prepared without a step of cold drawing. In particular, the bar product is preferably prepared without a step of drawing to provide a 10% to a 35% reduction. The bar product having a diameter of between about ¾ inch and about four inches can be characterized as having a tensile strength of greater than about 105 ksi, a yield strength of greater than about 90 ksi, and elongation in two inches of greater than about 7%, and a reduction of area of greater than about 20%. The invention relates to cylinder rods, hydraulic cylinders, methods for manufacturing cylinder rods and hydraulic cylinders.
Inventors:
Pepler, William Jay.
Harpol, Dennis
Won, Ken, Kay.
Harpol, Dennis
Won, Ken, Kay.
Application Number:
JP2001559893A
Publication Date:
July 29, 2003
Filing Date:
January 18, 2001
Export Citation:
Assignee:
Cargill, Inc.
International Classes:
C21D8/06; C21D9/00; C22C38/00; C22C38/04; F16J1/12; C22C38/42; C22C38/44; C22C38/48; C22C38/50; C22C38/60; C21D9/28; (IPC1-7): C21D8/06; C22C38/00; C22C38/50; C22C38/60; F16J1/12
Attorney, Agent or Firm:
Ikeuchi, Sato & Partners