公开(公告)号：US11207721B2

公开(公告)日：2021-12-28

申请号：US15776892

申请日：2016-11-15

Applicant: FUJICO CO., LTD.

Inventor： Hyo-Gyoung Kang ,  Akio Sonoda ,  Hideaki Nagayoshi ,  Hiroaki Furuta ,  Hiroyuki Miyazaki

IPC: B21B27/03 ,  C21D9/38 ,  C22C38/58 ,  B22D19/16 ,  B22D11/00 ,  B21B39/00 ,  C22C1/02 ,  C21D6/00 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52

Abstract: [PROBLEM] The invention provides a roll for hot rolling process having various types of more excellent durability performances than conventional rolls, and provides also a method for manufacturing the same.
[SOLUTION] A cladding layer 4 is formed on an outer circumference portion of a roll for hot rolling process 1, where the cladding layer 4 comprises: 0.5 to 0.7% by mass of C, 2.8 to 4.0% by mass of Si, 0.9 to 1.1% by mass of Cu, 1.4 to 1.6% by mass of Mn, 2.7 to 3.3% by mass of Ni, 13.5 to 14.5% by mass of Cr, 0.8 to 1.1% by mass of Mo, 0.9 to 1.1% by mass of Co, and 0.2 to 0.4% by mass of Nb, with a balance being Fe and inevitable impurities, and has a thickness of 5 mm or more.

公开(公告)号：US20190040486A1

公开(公告)日：2019-02-07

申请号：US16155087

申请日：2018-10-09

Applicant: United Technologies Corporation

Inventor： Herbert A. Chin ,  David A. Haluck ,  William P. Ogden ,  Michael A. Moulin

IPC: C21D9/38 ,  C23C8/32 ,  C21D7/13 ,  C23C8/02 ,  C23C8/22 ,  C21D1/06 ,  F16C33/62 ,  F16C33/34 ,  F16C33/32 ,  C21D6/00

CPC classification number: C21D9/38 ,  C21D1/06 ,  C21D6/002 ,  C21D7/13 ,  C21D2211/008 ,  C23C8/02 ,  C23C8/22 ,  C23C8/32 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16C2204/72 ,  F16C2223/12 ,  F16C2223/16

Abstract: A method for cost effectively case hardening a component formed from a martensitic stainless steel material with a desired metallurgical condition for high temperature, high rolling contact fatigue, corrosion and spall initiation and propagation resistance bearing performance. The method describes a method to significantly reduce the carburization or carbo-nitriding process times for appreciable reduction in manufacturing cost. The Method includes the steps of: forming the component from a martensitic stainless steel material having an ASTM grain size of 9 or finer; and subjecting the component to one of a carburization and a carbo-nitriding treatment with significantly lower case hardening times for manufacturing cost-effectiveness.

公开(公告)号：US10047429B2

公开(公告)日：2018-08-14

申请号：US14112871

申请日：2012-04-09

Applicant: Chikara Ohki

Inventor： Chikara Ohki

IPC: C21D1/06 ,  C23C8/32 ,  C21D1/74 ,  C21D1/76 ,  C21D9/36 ,  C21D9/38 ,  C21D9/40 ,  C23C8/26

CPC classification number: C23C8/32 ,  C21D1/06 ,  C21D1/74 ,  C21D1/76 ,  C21D9/36 ,  C21D9/38 ,  C21D9/40 ,  C23C8/26

Abstract: Provided is a gas nitrocarburizing method forming a nitride layer in a surface layer portion of a workpiece made of steel by heating the workpiece within a heat treatment furnace into which a heat treatment gas is introduced, the heat treatment gas containing ammonia gas and at least one of carbon dioxide gas and hydrogen gas, and having a remainder formed of an impurity.

公开(公告)号：US09925610B2

公开(公告)日：2018-03-27

申请号：US14418600

申请日：2013-07-24

Applicant: AKTIEBOLAGET SKF

Inventor： Hans-Juergen Friedrich ,  Helmut Hauck

IPC: C21D1/30 ,  B23K1/00 ,  F16C35/077 ,  C21D9/38 ,  F16C19/54 ,  F16C35/04 ,  C21D1/18 ,  F16C19/06

CPC classification number: B23K1/0006 ,  C21D1/18 ,  C21D1/30 ,  C21D9/38 ,  F16C19/06 ,  F16C19/54 ,  F16C35/042 ,  F16C35/077 ,  Y10T29/49696 ,  Y10T403/478

Abstract: A method for installing a first machine part into a second machine part includes press fitting the first machine part into the second machine part in its intended final position. The method also includes disposing an exothermically reactive substance on or in the first machine part and activating the exothermically reactive substance to cause a thermal structural change, stress relief, for example, in a part of the first machine part.

公开(公告)号：US06837945B1

公开(公告)日：2005-01-04

申请号：US09959455

申请日：2000-04-28

Applicant: Odd Sandberg ,  Bo Rydell

Inventor： Odd Sandberg ,  Bo Rydell

IPC: B21B21/02 ,  B21B27/00 ,  C21D9/38 ,  C22B9/16 ,  C22C38/00 ,  C22C38/24 ,  C22C38/26 ,  C22C38/34 ,  C22C38/36 ,  C22C38/18

CPC classification number: C22C38/26 ,  C21D9/38 ,  C21D2211/003 ,  C22C38/24 ,  C22C38/34 ,  C22C38/36

Abstract: The invention concerns a steel article, which consists of an alloy having a chemical composition, which contains in weight-%: 1.2 to 2.5 C; 0.8 to 2.0 Si, which partly can be replaced by aluminium, which may exist in an amount of max 1.0%; 0.1 to 1.5 Mn; 0.5 to 1.5 Cr; 1.2 to 5.0 (V+Nb/2), however max 1.0 Nb; balance iron and impurities in normal amounts, and having a microstructure which contains 4 to 12 volume-% of MC-carbides. The steel article can be used for manufacturing of cold-work tools, particularly pilger rolls for cold rolling of tubes. The invention also relates to a method of manufacturing the article.

Abstract translation: 本发明涉及一种钢制品，其由具有化学组成的合金组成，其重量％：1.2-2.5℃; 0.8〜2.0Si，其部分可以由铝代替，其可以以最大1.0％的量存在; 0.1〜1.5 Mn; 0.5〜1.5 Cr; 1.2〜5.0（V + Nb / 2），但最大1.0Nb; 平衡铁和正常量的杂质，并且具有含有4-12体积％的MC-碳化物的微结构。 钢制品可用于制造冷作工具，特别是用于冷轧管的卷取辊。 本发明还涉及一种制造制品的方法。

公开(公告)号：US6115917A

公开(公告)日：2000-09-12

申请号：US200724

申请日：1998-11-27

Applicant: John Francis Nolan ,  Thomas Eugene Gustafson ,  David John Grubish

Inventor： John Francis Nolan ,  Thomas Eugene Gustafson ,  David John Grubish

IPC: B23K9/00 ,  B23K9/02 ,  B23K9/028 ,  B23K9/16 ,  B23K9/167 ,  B23P6/00 ,  C21D1/30 ,  C21D9/38 ,  F01D5/00 ,  F01D5/06

CPC classification number: B23P6/005 ,  B23K9/0026 ,  B23K9/0213 ,  B23K9/028 ,  B23K9/16 ,  B23K9/167 ,  C21D9/38 ,  F01D5/005 ,  F01D5/063 ,  B23K2201/001 ,  C21D1/30 ,  F05D2230/80 ,  F05D2250/293 ,  G01N2291/044 ,  G01N2291/2675 ,  G01N2291/2693 ,  Y10T29/49318 ,  Y10T29/4973

Abstract: A method of repairing a turbine rotor wheel having an annular damaged dovetail includes removing the annular damaged dovetail from the turbine wheel, leaving a wheel body having a rim. A forged ring is welded to the rim and dovetails are formed in the forged ring to accommodate turbine bucket dovetails. The welding process including preheating, welding, and stress-relieving are performed while the rotor under repair is disposed in a lathe for rotation about a horizontal axis. The turbine rotor repair is accomplished from start to finish without displacing the rotor from the lathe.

Abstract translation: 修复具有环形损坏的燕尾榫的涡轮转子轮的方法包括从涡轮机叶轮移除环形损坏的燕尾榫，留下具有轮辋的轮体。 锻造环焊接到轮辋上，燕尾形成在锻造环中，以适应涡轮斗式燕尾榫。 在将修理的转子设置在车床中以围绕水平轴线旋转的同时进行包括预热，焊接和应力消除的焊接过程。 涡轮转子修复从头到尾完成，而不会使转子从车床移位。

公开(公告)号：US6049979A

公开(公告)日：2000-04-18

申请号：US200723

申请日：1998-11-27

Applicant: John Francis Nolan ,  Lawrence Michael Grycko ,  David Roy Parker ,  Gerald Richard Crawmer

Inventor： John Francis Nolan ,  Lawrence Michael Grycko ,  David Roy Parker ,  Gerald Richard Crawmer

IPC: B23K9/00 ,  B23K9/02 ,  B23K9/095 ,  B23K9/167 ,  C21D1/30 ,  C21D9/38 ,  F01D5/00 ,  B23P15/00

CPC classification number: B23P6/005 ,  B23K9/0026 ,  B23K9/0213 ,  B23K9/0956 ,  B23K9/167 ,  C21D9/38 ,  F01D5/005 ,  B23K2201/001 ,  C21D1/30 ,  F05D2250/293 ,  G01N2291/044 ,  G01N2291/2675 ,  G01N2291/2693 ,  Y10T29/49318 ,  Y10T29/49336

Abstract: The welding method for repairing a turbine rotor dovetail includes removal of buckets from damaged dovetails, removing a damaged dovetail from a turbine wheel, leaving a rotor wheel body having a rim. A plurality of ring sections are disposed about the wheel body rim, leaving axially opening annular grooves along opposite sides of the wheel. Welding apparatus including an electrode, welding wire and gas-carrying tube are inserted into the groove through an axial face of the wheel. One or more cover plates are disposed to overlie the groove at the location of its opening through the axial face of the wheel to at least partially seal the groove at its opening and maintain welding gas in the groove, enveloping the electrode and weld wire.

Abstract translation: 用于修理涡轮转子燕尾榫的焊接方法包括从损坏的燕尾槽中移除铲斗，从涡轮机轮移除损坏的燕尾榫，留下具有轮辋的转子轮体。 多个环形部分围绕车轮轮缘设置，沿车轮的相对侧留下轴向打开的环形槽。 包括电极，焊丝和气体输送管的焊接装置通过车轮的轴向面插入槽中。 一个或多个盖板被设置成在其开口的位置处通过轮的轴向面覆盖在凹槽上，以在其开口处至少部分地密封凹槽，并将焊接气体保持在凹槽中，包围电极和焊丝。

公开(公告)号：US5950310A

公开(公告)日：1999-09-14

申请号：US095814

申请日：1998-06-11

Applicant: Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

Inventor： Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

IPC: B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  B23Q7/10

CPC classification number: B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  Y10T29/4956 ,  Y10T29/49565

Abstract: A forged roll for rolling a seamless steel pipe, having excellent biting properties and wear resistance, and manufacturing method. The forged roll comprises a high carbon alloy cast steel comprising about 1.10-1.85 wt % carbon, about 0.3-1.2 wt % silicon, about 0.4-1.5 wt % manganese, about 0.5-2.0 wt % nickel, about 0.5-2.0 wt % chromium and iron. Heat treatment for spheroidal carbide formation is performed so that the spheroidal carbide covers about 35-55% of the area of the roll metallurgical structure.

Abstract translation: 用于轧制无缝钢管的锻造辊，具有优异的咬合特性和耐磨性，以及制造方法。 锻造辊包括高碳合金铸钢，其包含约1.10-1.85重量％的碳，约0.3-1.2重量％的硅，约0.4-1.5重量％的锰，约0.5-2.0重量％的镍，约0.5-2.0重量％的铬 和铁。 进行球形碳化物形成的热处理，使得球状碳化物覆盖辊冶金结构面积的约35-55％。

公开(公告)号：US5911842A

公开(公告)日：1999-06-15

申请号：US841676

申请日：1997-04-30

Applicant: Masao Shiga ,  Kishio Hidaka ,  Norio Yamada ,  Shigeyoshi Nakamura ,  Yutaka Fukui ,  Nobuo Shimizu ,  Ryoichi Kaneko ,  Yasuhiro Harada ,  Yasuo Watanabe ,  Toshio Fujita ,  Norio Morisada ,  Yasuhiko Tanaka

Inventor： Masao Shiga ,  Kishio Hidaka ,  Norio Yamada ,  Shigeyoshi Nakamura ,  Yutaka Fukui ,  Nobuo Shimizu ,  Ryoichi Kaneko ,  Yasuhiro Harada ,  Yasuo Watanabe ,  Toshio Fujita ,  Norio Morisada ,  Yasuhiko Tanaka

IPC: F01D5/02 ,  C21D9/28 ,  C21D9/38 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/54 ,  F01D5/06 ,  C21D8/10 ,  C21D9/30

CPC classification number: C22C38/32 ,  C21D9/28 ,  C22C38/001 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C21D2211/008

Abstract: A heat resisting steel whose metal structure is entirely martensite phase produced by tempering after quenching. The steel comprises, by weight, 0.05 to 0.20% C, not more than 0.15% Si, not more than 1.5% Mn, not more than 1.0% Ni, 8.5 to 13.0% Cr, not more than 3.50% Mo, not more than 3.5% W, 0.05 to 0.30% V, 0.01 to 0.20% Nb, not more than 5.0% Co, 0.001 to 0.020% boron, 0.005 to 0.040% nitrogen, 0.0005 to 0.0050% oxygen and 0.00001 to 0.0002% hydrogen. The steel has preferably not more than 10 of the Cr equivalent. The steel has 10 kgf/mm.sup.2 or more of 100,000 hours creep rupture strength at 650.degree. C.

Abstract translation: 淬火后通过回火生产金属结构完全是马氏体相的耐热钢。 该钢包含0.05〜0.20％的C，不大于0.15％的Si，不超过1.5％的Mn，不超过1.0％的Ni，8.5〜13.0％的Cr，不大于3.50％的Mo，不大于 3.5％W，0.05〜0.30％V，0.01〜0.20％Nb，5.0％以下的Co，0.001〜0.020％的硼，0.005〜0.040％的氮，0.0005〜0.0050％的氧和0.00001〜0.0002％的氢。 钢优选不超过10当量的Cr当量。 该钢在650℃下具有10kgf / mm 2以上的100,000小时蠕变断裂强度

公开(公告)号：US5833455A

公开(公告)日：1998-11-10

申请号：US645838

申请日：1996-05-14

Applicant: Hugh B. Carr

Inventor： Hugh B. Carr

IPC: C21D9/00 ,  C21D9/38 ,  F27D3/02 ,  F27D3/00 ,  B21H1/18

CPC classification number: F27D3/026 ,  C21D9/0012 ,  C21D9/38 ,  Y10T29/49544

Abstract: A dry furnace roll design operates at a high temperature environment of a metal heating furnace by arranging weld metal joining a roll sleeve to roll bells at opposite ends in cavities formed in the sidewalls of the furnace. A dense filling of ceramic fiber material is held in each roll bell underlying the weld connection with the roll sleeve by discs. Ceramic fiber material is put into the cavity of the sidewall and held in place by a keeper plate. The masses of weld metal joining the roll sleeve to the roll bells are comprised of TIG weld metal formed in an inert gas. Multi-pass welding is performed while supporting the roll assembly during the welding operation at an angled relation to the horizontal. The roll is rotated in the angled relation to allow the deposition of weld metal in multiple passes and in an accurately controllable manner preferably by the use of a microprocessor to control the positioning of weld electrode. The metal of the roll body is subject to annealing solution heat treating after a predetermined time of service in the high temperature environment of the furnace. The solution annealing reverses embrittlement and restores ductility caused by aging process of the metal at the high operating temperatures.

Abstract translation: 干炉辊设计在金属加热炉的高温环境下工作，通过将在辊子侧壁中形成的空腔的相对端处的辊筒套筒连接到滚筒上的焊接金属。 陶瓷纤维材料的致密填充物通过盘保持在与辊筒的焊接连接下方的每个辊罩中。 将陶瓷纤维材料放入侧壁的空腔中，并由保持板保持在适当位置。 将辊套与滚筒连接的焊接金属质量由在惰性气体中形成的TIG焊接金属组成。 在焊接操作期间以与水平方向倾斜的关系支撑辊组件的同时执行多通焊接。 辊以成角度的关系旋转，以允许焊接金属在多次通过中以最准确可控的方式沉积，优选地通过使用微处理器来控制焊接电极的定位。 辊体的金属在炉的高温环境下经过预定的使用时间后进行退火固溶热处理。 固溶退火反应了脆化并恢复了在高工作温度下金属的老化过程引起的延展性。