公开(公告)号：US20180327883A1

公开(公告)日：2018-11-15

申请号：US15775848

申请日：2016-10-03

Applicant: JFE STEEL CORPORATION

Inventor： Yoshiaki ZAIZEN ,  Tomoyuki OKUBO ,  Yoshihiko ODA

IPC: C21D9/46 ,  C22C38/58 ,  C22C38/50 ,  C22C38/48 ,  C22C38/34 ,  C22C38/06 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00

CPC classification number: C21D9/46 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/34 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C22C2202/02 ,  Y02P10/253

Abstract: A method for producing a non-oriented electrical steel sheet by hot rolling a steel slab having a chemical composition including C: not more than 0.0050 mass %, Si: not more than 4.0 mass %, Mn: 0.03-3.0 mass %, P: not more than 0.1 mass %, Se: not more than 0.0010 mass %, Al: not more than 3.0 mass %, Ni: not more than 3.0 mass %, Cr: not more than 5.0 mass %, Ti: not more than 0.003 mass %, and Nb: not more than 0.003 mass % and subjecting the sheet to hot band annealing if necessary, a cold rolling, and further a finish annealing, wherein the heating in the finish annealing is conducted in two stages of performing induction heating and subsequently a radiation heating and a zone from 600° C. to 740° C. in the induction heating is heated at an average heating rate of not less than 50° C./sec, whereby a high magnetic flux density can be obtained stably.

公开(公告)号：US20180320737A1

公开(公告)日：2018-11-08

申请号：US15771892

申请日：2016-10-12

Applicant: NTN CORPORATION

Inventor： Michio HORI ,  Hideto TORISAWA ,  Hiroshi YUKI ,  Chikara OHKI ,  Kazuhiro YAGITA

IPC: F16C19/38 ,  F16C33/62 ,  F16C33/64 ,  F16C43/04 ,  C21D1/10 ,  C21D1/28 ,  C22C38/22 ,  C22C38/44 ,  C21D9/40 ,  C21D7/06

CPC classification number: F16C19/385 ,  C21D1/10 ,  C21D1/28 ,  C21D7/06 ,  C21D9/40 ,  C22C38/00 ,  C22C38/22 ,  C22C38/44 ,  F03D80/70 ,  F05B2240/50 ,  F16C19/38 ,  F16C33/62 ,  F16C33/64 ,  F16C43/04 ,  F16C2360/31 ,  Y02P10/253

Abstract: A method for producing a bearing ring of a double row tapered roller bearing includes the steps of: preparing a formed body; forming a heated region; cooing; and removing. In the step of forming a heated region, an induction heating coil arranged to face part of the groove and induction-heating the fixated body is relatively rotated along the circumferential direction of the groove to form a heated region including the bottom surface of the groove and heated to a temperature of at least an Al point. In the cooling step, the whole of the heated region is simultaneously cooled to a temperature of not more than an Ms point. After the step of forming a heated region before the step of cooling, the method further includes the step of retaining the formed body in a state where heating is stopped.

公开(公告)号：US20180265960A1

公开(公告)日：2018-09-20

申请号：US15918560

申请日：2018-03-12

Applicant: BWT LLC

Inventor： Craig Zimmerman ,  Jim Hedman ,  Jeff Hemmer

IPC: C23C8/80 ,  C23C8/70 ,  C21D9/08 ,  C21D8/10 ,  C21D1/18

CPC classification number: C23C8/80 ,  C21D1/18 ,  C21D1/42 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/001 ,  C23C8/70 ,  E21B1/00 ,  E21B17/006 ,  F16L57/06 ,  Y02P10/253

Abstract: A process comprising: placing a boronizing powder composition in a metal pipe comprising a first end, a second end, an inside surface and an outside surface; heating the pipe to form a borided layer on the inside surface, and spent boronizing powder; removing the spent boronizing powder from the pipe, thereby forming an empty boronized pipe; heating the empty boronized pipe to above its austenitizing temperature, thereby forming an austenitized pipe; quenching the austenitized pipe, thereby forming a quenched pipe; tempering the quenched pipe, thereby forming a tempered pipe; and threading the tempered pipe.

公开(公告)号：US10080261B2

公开(公告)日：2018-09-18

申请号：US12733922

申请日：2008-09-26

Applicant: Hidetoshi Terashima ,  Seiji Ieda

Inventor： Hidetoshi Terashima ,  Seiji Ieda

IPC: H05B6/22 ,  H05B6/36 ,  C21D1/42 ,  C21D9/60 ,  C21D1/10 ,  C21D9/56 ,  D03D15/00 ,  D03D15/12 ,  F27D11/12 ,  F27D99/00 ,  C21D9/46

CPC classification number: H05B6/36 ,  C21D1/10 ,  C21D1/42 ,  C21D9/46 ,  C21D9/56 ,  C21D9/60 ,  D03D15/00 ,  D03D15/12 ,  D10B2101/08 ,  D10B2505/00 ,  F27D11/12 ,  F27D99/0006 ,  F27D2099/0015 ,  Y02P10/253

Abstract: It was learned that in an insulation heating coil used for continuously heating a running steel sheet, the conventional insulated structure of the induction heating coil was selected focusing on the heat resistance and insulation ability of the insulation itself and cannot prevent a drop in insulation ability due to entry of fine metal particles (for example, zinc fumes) in the surroundings.Therefore, an insulated structure of induction heating coil preventing the entry of zinc fumes and other fine metal particles, not falling in strength even in a high temperature environment, and able to extend the service life of the induction coil is provided.Specifically, the surface of the induction heating coil is covered with a ceramic cloth made of alumina-silica ceramic long-fibers not containing boron and the surface of that is formed with a heat-resistant insulation layer made of a surface hardening ceramic material containing alumina or alumina-silica fine particles and alumina-silica ceramic short-fibers.

公开(公告)号：US10010915B2

公开(公告)日：2018-07-03

申请号：US14772092

申请日：2014-03-10

Applicant: SMS Group GmbH

Inventor： Christoph Klein ,  Christian Bilgen ,  Christian Klinkenberg ,  Michael Pander ,  Luc Neumann ,  Dieter Rosenthal ,  Cosimo Andreas Cecere

IPC: B22D11/00 ,  B21B1/26 ,  B21B45/00 ,  C21D1/00 ,  C21D1/42 ,  C21D6/00

CPC classification number: B21B1/26 ,  B21B45/004 ,  B22D11/00 ,  C21D1/00 ,  C21D1/42 ,  C21D6/00 ,  Y02P10/253

Abstract: A method for producing a metal strip (1) by casting and rolling, wherein first a slab (3) is cast in a caster (2) by dispensing metal from a mold (4), wherein the slab (3) is deflected from the vertical direction to the horizontal direction in the region of a strand guide (5), wherein the slab (3) is then tempered in a furnace (6), wherein the slab (3) is rolled in a rolling train (7) after the furnace (6) and wherein the slab (3) is processed either in discontinuous batch operation or in continuous or semi-continuous operation in dependence on a specified manner of operation. According to the invention, in order to create optimal process conditions for all desired operating modes, the slab (3) to be rolled or the metal strip (1) being rolled is subjected to heating in the region of the rolling train (7) at least between two roll stands (8, 9, 10, 11, 12, 13, 14) by means of an inductor (15).

公开(公告)号：US10005116B2

公开(公告)日：2018-06-26

申请号：US14427075

申请日：2013-09-11

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Nobuhiro Okada ,  Atsushi Tomizawa ,  Hiroaki Kubota

IPC: B21D7/16 ,  H05B6/10 ,  H05B6/36 ,  H05B6/40 ,  H05B6/44 ,  C21D9/08 ,  C21D1/42 ,  C21D9/00 ,  F27D11/06 ,  F27D11/12

CPC classification number: B21D7/162 ,  B21D7/165 ,  C21D1/42 ,  C21D9/00 ,  C21D9/0075 ,  C21D9/08 ,  F27D11/06 ,  F27D11/12 ,  H05B6/101 ,  H05B6/104 ,  H05B6/36 ,  H05B6/365 ,  Y02P10/253

Abstract: Provided is a high frequency induction heating apparatus capable of quenching a workpiece having an outward flange, over the whole circumference by means of a frequency with which a penetration depth of an electromagnetic wave is larger than a sheet thickness of the workpiece The high frequency induction heating apparatus includes a high frequency induction heating coil used for heating a long hollow steel workpiece having a closed cross section and an outward flange, in 3DQ in which a bending member is manufactured from the workpiece The high frequency induction heating coil includes a magnetic material core facing each other between which both faces of the outward flange are interposed, having a distance from both faces, and an induction heating coil connected to the magnetic material core and arranged surrounding an outer circumference of a general portion where the outward flange is excluded from the workpiece.

公开(公告)号：US20180161934A1

公开(公告)日：2018-06-14

申请号：US15818921

申请日：2017-11-21

Applicant: ROLLS-ROYCE plc

Inventor： John H. BOSWELL

IPC: B23K26/342 ,  B33Y30/00 ,  B33Y50/02 ,  B23K26/354 ,  G05B19/4097

CPC classification number: B23K26/342 ,  B22F3/1055 ,  B22F2003/1056 ,  B22F2003/1057 ,  B22F2003/1059 ,  B22F2998/10 ,  B22F2999/00 ,  B23K26/354 ,  B29C64/295 ,  B29C64/30 ,  B29C64/35 ,  B29C64/379 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B65G69/20 ,  C21D1/30 ,  C21D1/42 ,  C21D6/001 ,  C21D6/007 ,  C21D11/00 ,  C21D11/005 ,  C21D2241/02 ,  C22F1/10 ,  C22F1/183 ,  G05B19/4097 ,  G05B2219/35134 ,  G05B2219/49007 ,  Y02P10/24 ,  Y02P10/253 ,  Y02P10/295 ,  B22F3/005 ,  B22F2003/248 ,  B22F2203/11 ,  B22F5/04 ,  B65G69/00 ,  B22F5/009

Abstract: A method of manufacturing an article, the method comprising: controlling an additive manufacturing printer to build an article in a cavity of a build chamber from a powdered material, the build chamber being removable from the additive manufacturing printer and including one or more heaters configured to provide thermal energy to the cavity of the building chamber; and controlling the one or more heaters of the build chamber to heat the article to a predetermined temperature while building the article to prevent the article from cracking while the build chamber and the article are transferred from the additive manufacturing printer to a heater, the predetermined temperature being between the upper temperature of the ductility drop temperature range of the powdered material and the sintering temperature of the powdered material.

公开(公告)号：US09970072B2

公开(公告)日：2018-05-15

申请号：US14439864

申请日：2013-12-02

Applicant: KOBE STEEL, LTD.

Inventor： Atsuhiko Takeda ,  Nao Yoshihara

IPC: C22C38/02 ,  C22C38/04 ,  C21D9/52 ,  C21D1/18 ,  C21D6/00 ,  C21D1/42 ,  C21D9/60 ,  C22C38/00 ,  C22C38/06 ,  C22C38/54 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C21D8/06 ,  C21D1/22 ,  C21D9/02 ,  C22C38/18 ,  C22C38/42 ,  C22C38/50 ,  F16F1/02

CPC classification number: C21D1/42 ,  C21D1/22 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/065 ,  C21D9/02 ,  C21D9/525 ,  C21D9/60 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/34 ,  C22C38/42 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021 ,  Y02P10/253

Abstract: A high-strength spring steel wire is provided which secures excellent hydrogen embrittlement resistance even when the adding amount of alloy elements is suppressed, and has 80 area % or more of tempered martensite and 1,900 MPa or more of the tensile strength, in which a predetermined chemical composition is satisfied, with C and Si satisfying the relation of the expression (1) below, with prior austenite grain size number being No. 10 or more, and with the hydrogen absorption amount being 14.0 ppm or more. 0.73%≤[C]+[Si]/8≤0.90%  (1) where [C] and [Si] express the content (mass %) of C and Si respectively.

公开(公告)号：US09943899B2

公开(公告)日：2018-04-17

申请号：US14667139

申请日：2015-03-24

Applicant: MONTEBELLO TECHNOLOGY SERVICES LTD. ,  1949467 ONTARIO INC.

Inventor： Betty Jean Pilon ,  Peter Stathopoulos ,  Georgi Georgiev ,  Benjamin Joseph Pilon

IPC: B21D26/049 ,  B21D26/14 ,  C21D1/42 ,  C21D9/00 ,  C22C21/00 ,  C22F1/04 ,  H05B6/10 ,  B21D15/10 ,  B21D51/24 ,  C21D9/08 ,  C21D7/12 ,  C21D1/26

CPC classification number: B21D26/049 ,  B21D15/10 ,  B21D51/24 ,  C21D1/26 ,  C21D1/42 ,  C21D7/12 ,  C21D9/0068 ,  C21D9/08 ,  C21D2221/00 ,  C21D2221/10 ,  C22C21/00 ,  C22F1/04 ,  H05B6/101 ,  Y02P10/253 ,  Y10T29/49805

Abstract: A method is disclosed for pressure forming a metal preform including shock annealing of the preform and subsequently preheating the preform prior to pressure forming. Shock annealing may be carried out as differential shock annealing in which different regions of the preform are annealed to different degrees. Preheating may be carried out by differentially preheating, optionally shock preheating, different regions of the preform for preheating at least those regions of the preform which will be subject to elevated expansion during pressure forming. Shock annealing by induction heating can lower energy consumption, reduce processing times and allow for larger expansion of the preform.

公开(公告)号：US20180100209A1

公开(公告)日：2018-04-12

申请号：US15566725

申请日：2016-04-19

Applicant: Cockerill Maintenance & Ingenierie S.A.

Inventor： Michel Dubois

IPC: C21D1/76 ,  C21D9/46 ,  C21D9/56 ,  C21D9/60 ,  C21D9/62

CPC classification number: C21D1/76 ,  C21D9/46 ,  C21D9/561 ,  C21D9/60 ,  C21D9/62 ,  C21D11/00 ,  C23C2/02 ,  C23C8/10 ,  Y02P10/253

Abstract: A method for controlling surface reactions on a steel strip running through a furnace includes, successively, a first section, a second section, and a third section separated by a sealing element, an atmosphere in the second and third sections being oxidizing and reducing respectively, the method including: heating, in the first section, the steel strip to between 600 and 750° C., while causing the atmosphere therein to be slightly oxidizing and to include: an H2 content inferior to 2%; an O2 content inferior to 0.1%; an H2O or CO2, or H2O+CO2 content superior to 0.03%; a controlled dew point ranging from −50 to −15° C.; and a controlled concentration of CO+CO2 maintained below 2%. All percentages are expressed in terms of volume.