Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Hudson Soft Co., Ltd.

Mitsubishi Plastics Industries Limited

Jal Data Communication & Systems Co., Ltd.

Toshiyuki Manabe

Shingo Yamasaki

Daisuke Hirakami

Nariyasu Muroga

Atsushi Ono

Naoki Matsui

Seiki Nishida

Hiroki Fujimoto

Osamu Murakami

Takashi Imamura

Koji Akioka

Yoshihiro Daito

Junichi Matsuura

Arata Iso

Toshihiko Nakajima

Kiyoshi Kaneko

Keiichi Takeuchi

Toshihiko Teshima

Tatsusei Tada

Naoshi Hikita

Susumu Sahara

A method for manufacturing a riveted joint includes: causing a shaft portion of a steel rivet having the shaft portion and a head portion to pass through through-holes of a plurality of overlaid sheet members; sandwiching the rivet between a pair of electrodes in axial direction of the rivet; applying a force to the rivet and energizing the rivet with the electrodes to form a deformed portion at a distal end of the shaft portion; and cooling the rivet. In the rivet after cooling, a Vickers hardness HB of the head portion satisfies 130≤HB≤330, and a Vickers hardness HA of the deformed portion, a thickness TA of the deformed portion, a Vickers hardness HJ of a portion of the shaft portion at center in axial direction and at center in radial direction, diameter DJ of the shaft portion, a Vickers hardness HB of the head portion, and a thickness TB of the head portion satisfy HJ×DJ≥4.7×HB×TB and HA×TA≥1.3×HB×TB.

Method for manufacturing riveted joint, riveted joint, and vehicle component

Provided is a steel wire rod for wire drawing containing, in terms of % by mass, C: from 0.90 to 1.20%, Si: from 0.10 to 1.30%, Mn: from 0.20 to 1.00%, Cr: from 0.20 to 1.30%, Al: from 0.005 to 0.050%, and the balance being composed of Fe and impurities, wherein a content of each N, P, and S, which are contained as the impurities, is N: from 0.0070% or less, P: from 0.030% or less, S: from 0.010% or less, and the steel wire rod having a metallographic structure of which 95% or more by volume ratio is a lamellar pearlite structure, wherein the lamellar pearlite structure has an average lamellar spacing of from 50 to 75 nm, an average length of cementites in the lamellar pearlite structure is 1.0 to 4.0 &#x3bc;m, and a percentage of a number of cementites having a length of 0.5 &#x3bc;m or less among the cementites in the lamellar pearlite structure is 20% or less.

Steel wire rod for wire drawing

A wire rod according to an aspect of the present invention has a predetermined chemical composition, a solute N is 0.0015% or less, a structure in an area from a surface of the wire rod to a depth of &#xbc; of a diameter of the wire rod in a cross section thereof includes 90.0 area % or more of pearlite, and 0 to 10.0 area % in total of bainite and ferrite, a total amount of martensite and cementite in the area from the surface of the wire rod to the depth of &#xbc; of the diameter of the wire rod is limited to 2.0 area % or less, and the calculated maximum size of TiN-type inclusions in a surface layer area of the wire rod is 50 &#x3bc;m or less.

Wire rod

A steel wire rod which is a material of steel wires includes, as a metallographic structure, by area %, 95% to 100% of a pearlite, wherein an average pearlite block size at a central portion of the steel wire rod is 1 &#x3bc;m to 25 &#x3bc;m, an average pearlite block size at a surface layer portion of the steel wire rod is 1 &#x3bc;m to 20 &#x3bc;m, and, when a minimum lamellar spacing of the pearlite at the central portion of the steel wire rod is S in unit of nm and when a distance from a peripheral surface of the steel wire rod to a center is r in unit of mm, S&#x3c;12r+65 is satisfied.

Steel wire rod and method of producing same

The present invention provides a wire rod with a composition at least including: C: 0.95-1.30 mass %; Si: 0.1-1.5 mass %; Mn: 0.1-1.0 mass %; Al: 0-0.1 mass %; Ti: 0-0.1 mass %; P: 0-0.02 mass %; S: 0-0.02 mass %; N: 10-50 ppm; O: 10-40 ppm; and a balance including Fe and inevitable impurities, wherein 97% or more of an area in a cross-section perpendicular to the longitudinal direction of the wire rod is occupied by a pearlite, and 0.5% or less of an area in a central area in the cross-section and 0.5% or less of an area in a first surface layer area in the cross-section are occupied by a pro-eutectoid cementite.

Wire rod, steel wire, and manufacturing method thereof

A plated steel wire for PWS with excellent twist properties contains, in terms of mass %, 0.8 to 1.1% of C, 0.8 to 1.3% of Si, 0.3 to 0.8% of Mn, 0.001 to 0.006% of N, and 0.0004 to 0.0060% of B, where a quantity of solid-solubilized B is at least 0.0002%, also contains either one or both of 0.005 to 0.1% of Al and 0.005 to 0.1% of Ti, and contains as the remainder, Fe and unavoidable impurities, wherein an area fraction of non-pearlite structures in a region from a surface layer down to a depth of 50 &#x3bc;m is not more than 10%, an area fraction of non-pearlite structures within an entire cross-section is not more than 5%, and a surface of the steel wire is galvanized with a plating quantity within a range from 300 to 500 g/m.

Plated steel wire for parallel wire strand (PWS) with excellent twist properties

A baggage managing system for removing a non-boarding passenger's baggage rapidly from a plane even if a passenger checks plural pieces of baggages and improving the convenience of passengers without rise in costs. A clerk inputs the number of baggages operating a baggage numbers input unit A boarding pass read/write unit reads boarding information including passenger's ID and flight number from a boarding pass and generates baggage ID in accordance with the baggage numbers and the boarding information. A tag issuing unit issues a tag having recorded the passenger's ID and the baggage ID. The tag is attached to the baggage and read by a tag and container reading device When a passenger P passes a gate a boarding pass reading device reads the boarding information from the boarding pass The boarding information and the baggage ID etc. are recorded in databases A and B. A host computer specifies a container storing a non-boarding passenger's baggage in accordance with the information recorded in the databases A and B.

Baggage managing system in airport

An information collecting system comprises an access terminal connectable to a data base through a network and a host computer, an IC memory card adapted for removable insertion into the access terminal, and a portable personal terminal. Requests for an item of information, from a customer, are inputted and recorded in the IC memory card using the personal terminal and the IC memory card is inserted into the access terminal. The request for information is transmitted through the access terminal to the data base and the requested information, transmitted from the data base, is stored in the IC memory card. Thereafter, the IC memory card, storing the information, is inserted into the personal terminal whereby the requested information is displayed on a display formed in the personal terminal.

Information collecting and/or service furnishing systems by which a user

Growing community of inventors

Tokyo, Japan

Toshiyuki Manabe