Nippon Steel Sumitomo Metal Corporation

Ricoh Company, Ltd.

Nippon Steel Corporation

Naoki Saitoh

Yasunori Takahashi

Hitoshi Furuya

Motohiro Okushima

Yoshinori Uchino

Katsumi Kurebayashi

Yoichi Ito

Kazuyoshi Kondo

Yasushi Hasegawa

Tohru Watanabe

Makoto Kikura

Kazuyoshi Matsumoto

Tomomi Katoh

Tadashi Okano

Norikazu Yanase

Soyoung Park

Ryuji Uemori

Yuta Moriwaki

Gaku Hosono

Yuuzoh Obata

Fumitaka Kikkawa

Mitsuru Sawamura

Mikio Ohashi

Tatsuya Kumagai

Toshihisa Nakamura

Youichi Tanaka

Hirohide Muraoka

Kenji Katoh

Takehiro Inoue

Takumi Miyake

In a steel plate according to the present invention, a chemical composition is within a predetermined range, an &#x3b1; value is 0.13 to 1.0 mass %, a &#x3b2; value is 8.45 to 15.2, an yield strength is 670 to 870 N/mm, a tensile strength is 780 to 940 N/mm, an average grain size at &#xbd;t of the steel plate is 35 &#x3bc;m or less, and a plate thickness is 25 to 200 mm. In the steel plate according to the present invention, in a case where SR is performed on the steel, a charpy absorbed energy at &#x2212;40&#xb0; C. in an area in which SR is performed may be 100 J or more.

[object Object]

An image forming apparatus includes an apparatus body, a sheet feeder to load a roll body including a recording medium wound around, an image forming unit to form an image on the recording medium, and a conveyance unit including a conveyance belt to convey the recording medium drawn out from the roll body so as to oppose the recording medium to the image forming unit. The sheet feeder and the conveyance unit are integrated as a sheet feed conveyance unit. The sheet feed conveyance unit is configured to load the roll body in at least the sheet feeder and be drawable from the apparatus body to a position at which the conveyance belt is visible.

Image forming apparatus and method of setting print media

A Ni-added steel plate includes, by mass %, C: 0.04% to 0.10%, Si: 0.02% to 0.12%, Mn: 0.3% to 1.0%, Ni: more than 7.5% to 10.0%, Al: 0.01% to 0.08%, T.O: 0.0001% to 0.0030%, P: limited to 0.0100% or less, S: limited to 0.0035% or less, N: limited to 0.0070% or less, and the balance consisting of Fe and unavoidable impurities, in which a Ni segregation ratio at an area of &#xbc; of a plate thickness away from a plate surface in a thickness direction is 1.3 or less, a fraction of austenite after a deep cooling is 0.5% or more, an austenite unevenness index after the deep cooling is 3.0 or less, and an average equivalent circle diameter of the austenite after the deep cooling is 1 &#x3bc;m or less.

Ni-added steel plate and method of manufacturing the same

An image forming apparatus includes an output unit, a pair of output rotary bodies, and a controller. A sheet having an image formed thereon is discharged to the output unit. When plural sheets are sequentially discharged to the output unit, the controller controls overlapping output operation to, with a trailing end portion of a preceding sheet of the plural sheets being held by the pair of output rotary bodies, feed a subsequent sheet of the sheets to between the pair of output rotary bodies to overlap a leading end portion of the subsequent sheet with the trailing end portion of the preceding sheet. With the leading end portion of the subsequent sheet overlapped with the trailing end portion of the preceding sheet, the controller controls the pair of output rotary bodies to rotate to discharge the preceding sheet to the output unit.

Image forming apparatus

An image forming apparatus includes an image forming unit forming an image on a recording medium; and a feeding unit feeding the recording medium in first and second directions opposite to each other relative to the image forming unit. Further when the recording medium is supplied from a first or second side of the feeding unit, while the feeding unit feeds the recording medium in the first or second feeding direction, the image forming unit forms an image on the recording medium, and the feeding unit further feeds the recording medium to the second or first side, respectively, of the feeding unit.

Image forming apparatus configured for bi-directional feeding of medium

The present invention provides a high-tensile steel material having a tensile strength of the 550 MPa class or more which can simultaneously raise the strength and toughness of the heat affected zone of weld to equal those of the matrix and a method of production of the same, that is, a high-tensile steel material with excellent weldability and toughness and with tensile strength of the 550 MPa class or more containing, by mass %, C: 0.005 to 0.10%, W: 0.10 to 3.0%, Nb: 0.010 to 0.080%, and V: 0.010 to 0.50%, limiting the Ti to less than 0.005%, satisfying equation; EC=2[C]&#x2212;[Nb]/9&#x2212;[V]/12&#x3e;0.020, having an amount of precipitation of W contained in the steel material, in terms of analytical value obtained by quantitative analysis of potential electrolysis extraction residue by fluorescent X-ray analysis, of 0.0050% or less, and having 60% or more of its structural composition in a cross-section of the steel as a bainite structure.

High-tensile steel with excellent weldability and toughness and with tensile strength of 550 MPa class or more and method of production of the same

A Ni-added steel plate contains, by mass %, C: 0.03% to 0.10%, Si: 0.02% to 0.40%, Mn: 0.3% to 1.2%, Ni: 5.0% to 7.5%, Cr: 0.4% to 1.5%, Mo: 0.02% to 0.4%, Al: 0.01% to 0.08%, T.O: 0.0001% to 0.0050%, P: limited to 0.0100% or less, S: limited to 0.0035% or less, and N: limited to 0.0070% or less with a remainder composed of Fe and inevitable impurities, in which a Ni segregation ratio at a position of &#xbc; of a plate thickness away from a plate surface in a thickness direction is 1.3 or less, a fraction of austenite after deep cooling is 2% or more, an austenite unevenness index after deep cooling is 5.0 or less, and an average equivalent circle diameter of austenite after deep cooling is 1 &#x3bc;m or less.

The present invention provides an abrasion resistant steel having a hardness of HB400 to HB520, having little change of hardness during long term use, and superior in toughness, characterized by containing, by mass %, C: 0.21% to 0.30%, Si: 0.30 to 1.00%, Mn: 0.32 to 0.70%, P: 0.02% or less, S: 0.01% or less, Cr: 0.1 to 2.0%, Mo: 0.1 to 1.0%, B: 0.0003 to 0.0030%, Al: 0.01 to 0.1%, and N: 0.01% or less, further containing one or more of V: 0.01 to 0.1%, Nb: 0.005 to 0.05%, Ti: 0.005 to 0.03%, Ca: 0.0005 to 0.05%, Mg: 0.0005 to 0.05%, and REM: 0.001 to 0.1%, having a balance of Fe, and furthermore having an ingredient with an M value defined by the following formula (1) of &#x2212;10 to 16:=26&#xd7;[Si]&#x2212;40&#xd7;[Mn]&#x2212;3&#xd7;[Cr]+36&#xd7;[Mo]+63&#xd7;[V]&#x2003;&#x2003;(1)

High toughness abrasion resistant steel with little change in hardness during use and method of production of same

The present invention provides a steel plate that exhibits excellent low-temperature toughness in a base material and a weld heat-affected zone and has small strength anisotropy, wherein the steel includes, by mass, C: 0.04%-0.10%; Si: 0.02%-0.40%; Mn: 0.5%-1.0%; P: 0.0010%-0.0100%; S: 0.0001%-0.0050%; Ni: 2.0%-4.5%; Cr: 0.1%-1.0%; Mo: 0.1%-0.6%; V: 0.005%-0.1%; Al: 0.01%-0.08%; and N: 0.0001%-0.0070%, with the balance including Fe and inevitable impurities, a Ni segregation ratio at a portion located at one-fourth of a thickness of the steel plate in a steel-plate thickness direction from a surface of the steel plate is 1.3 or lower, a degree of flatness of a prior austenite grain is in a range from 1.05 to 3.0, an effective diameter of crystal grain is 10 &#x3bc;m or lower, and a Vickers hardness number is in a range of 265 HV to 310 HV.

Steel plate that exhibits excellent low-temperature toughness in a base material and weld heat-affected zone and has small strength anisotropy, and manufacturing method thereof

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Tokyo, Japan

Naoki Saitoh