公开(公告)号：US20080276757A1

公开(公告)日：2008-11-13

申请号：US10829823

申请日：2004-04-22

Applicant: Narasimha-Rao Venkata Bangaru ,  ChangMin Chun ,  Neeraj Srinivas Thirumalai ,  Shiun Ling ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Roger Peterson ,  Robert Lee Antram ,  Christopher John Fowler

Inventor： Narasimha-Rao Venkata Bangaru ,  ChangMin Chun ,  Neeraj Srinivas Thirumalai ,  Shiun Ling ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Roger Peterson ,  Robert Lee Antram ,  Christopher John Fowler

IPC: C22C29/08

CPC classification number: C22C29/067

Abstract: Cermets are provided in which the ceramic phase is selected from the group consisting of Cr23C6, Cr7C3, Cr3C2 and mixtures thereof. The binder phase is selected from certain specified Ni/Cr alloys and certain Fe/Ni/Cr alloys. These cermets are particularly useful in protecting surfaces from erosion at high temperatures.

Abstract translation: 提供了金属陶瓷，其中陶瓷相选自Cr 23 C 6 C 6 C 6 C 7 C 6， SUB 3，Cr 3 3 C 2和它们的混合物。 粘结相选自某些特定的Ni / Cr合金和某些Fe / Ni / Cr合金。 这些金属陶瓷特别适用于在高温下保护表面免受侵蚀。

公开(公告)号：US20070181647A1

公开(公告)日：2007-08-09

申请号：US11643528

申请日：2006-12-21

Applicant: Steven Ford ,  Neeraj Thirumalai ,  James Rigby ,  Mark Biegler ,  Narasimha-Rao Venkata Bangaru ,  Jayoung Koo ,  Glen Vaughn ,  Raghavan Ayer ,  Douglas Fairchild

Inventor： Steven Ford ,  Neeraj Thirumalai ,  James Rigby ,  Mark Biegler ,  Narasimha-Rao Venkata Bangaru ,  Jayoung Koo ,  Glen Vaughn ,  Raghavan Ayer ,  Douglas Fairchild

IPC: A47J36/02

CPC classification number: B23K20/1225 ,  B23K20/227 ,  B23K2101/06 ,  B23K2103/02

Abstract: A method for welding and repairing cracks in metal parts is provided by subjecting the metal parts to be welded to friction stir welding and the cracks to be repaired to friction stir processing under conditions sufficient to provide a weld joint or crack repair having a preselected property or set of properties based upon the intended use of the weldment. The FSW and FSP methods are advantageous in joining and repairing metal structures and components in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.

Abstract translation: 一种用于焊接和修复金属部件中的裂纹的方法是通过在足以提供具有预选性质的焊接接头或裂缝修复的条件下对要焊接的金属部件进行摩擦搅拌焊接和要修复的裂纹进行摩擦搅拌加工的方法， 基于焊件的预期用途的一组属性。 FSW和FSP方法在天然气运输和储存，油气井完井和生产以及油气炼厂和化工厂的应用中，有利于接合和修复金属结构和部件。

公开(公告)号：US07247186B1

公开(公告)日：2007-07-24

申请号：US10829820

申请日：2004-04-22

Applicant: ChangMin Chun ,  Narasimha-Rao Venkata Bangaru ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Roger Peterson ,  Robert Lee Antram ,  Christopher John Fowler

Inventor： ChangMin Chun ,  Narasimha-Rao Venkata Bangaru ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Roger Peterson ,  Robert Lee Antram ,  Christopher John Fowler

IPC: C22C29/04

CPC classification number: C23C30/00 ,  C22C29/04

Abstract: The invention includes a cermet composition represented by the formula (PQ) (RS) comprising: a ceramic phase (PQ) and a binder phase (RS) wherein, P is a metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Fe, Mn and mixtures thereof, Q is carbonitride, R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S comprises at least one element selected from Cr, Al, Si and Y.

Abstract translation: 本发明包括由式（PQ）（RS）表示的金属陶瓷组合物，其包含：陶瓷相（PQ）和粘结相（RS），其中P是选自Ti，Zr，Hf，V ，Nb，Ta，Cr，Mo，W，Fe，Mn及其混合物，Q为碳氮化物，R为选自Fe，Ni，Co，Mn及其混合物的金属，S包含至少一种选自 来自Cr，Al，Si和Y.

公开(公告)号：US20070107548A1

公开(公告)日：2007-05-17

申请号：US11639532

申请日：2006-12-15

Applicant: ChangMin Chun ,  Narasimha-Rao Bangaru ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

Inventor： ChangMin Chun ,  Narasimha-Rao Bangaru ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

IPC: C22C29/16

CPC classification number: B04C5/085 ,  C22C29/16 ,  C22C32/0068 ,  C23C30/00

Abstract: The invention includes a cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and a binder phase (RS) wherein, P is a metal selected from the group consisting of Si, Mn, Fe, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof, Q is nitride, R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S consists essentially of at least one element selected from Cr, Al, Si, and Y, and at least one reactive wetting aliovalent element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof.

公开(公告)号：US20070006679A1

公开(公告)日：2007-01-11

申请号：US10829816

申请日：2004-04-22

Applicant: Narasimha-Rao Bangaru ,  ChangMin Chun ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

Inventor： Narasimha-Rao Bangaru ,  ChangMin Chun ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

IPC: C22C29/14

CPC classification number: C22C29/14 ,  C23C24/08 ,  C23C30/00 ,  Y10T428/25 ,  Y10T428/31678

Abstract: A cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and binder phase (RS) wherein, P is at least one metal selected from the group consisting of Group IV, Group V, Group VI elements, Q is boride, R is selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S comprises at least one element selected from Cr, Al, Si and Y.

Abstract translation: 由式（PQ）（RS）表示的金属陶瓷组合物，其包含：陶瓷相（PQ）和粘结相（RS），其中P为选自第IV族，第V族，第VI族元素中的至少一种金属 Q是硼化物，R选自Fe，Ni，Co，Mn及其混合物，S包括选自Cr，Al，Si和Y中的至少一种元素。

公开(公告)号：US20060266155A1

公开(公告)日：2006-11-30

申请号：US11499787

申请日：2006-08-04

Applicant: Narasimha-Rao Bangaru ,  ChangMin Chun ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

Inventor： Narasimha-Rao Bangaru ,  ChangMin Chun ,  Neeraj Thirumalai ,  Hyun-Woo Jin ,  Jayoung Koo ,  John Peterson ,  Robert Antram ,  Christopher Fowler

IPC: C22C29/14

CPC classification number: C22C29/14 ,  C23C24/08 ,  C23C30/00 ,  Y10T428/25 ,  Y10T428/31678

Abstract: A cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and binder phase (RS) wherein, P is at least one metal selected from the group consisting of Group IV, Group V, Group VI elements, Q is boride, R is selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S comprises at least one element selected from Cr, Al, Si and Y.

Abstract translation: 由式（PQ）（RS）表示的金属陶瓷组合物，其包含：陶瓷相（PQ）和粘结相（RS），其中P为选自第IV族，第V族，第VI族元素中的至少一种金属 Q是硼化物，R选自Fe，Ni，Co，Mn及其混合物，S包括选自Cr，Al，Si和Y中的至少一种元素。

公开(公告)号：US07048810B2

公开(公告)日：2006-05-23

申请号：US10253129

申请日：2002-09-24

Applicant: Clifford W. Petersen ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Michael J. Luton

Inventor： Clifford W. Petersen ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Michael J. Luton

IPC: C12D8/10

CPC classification number: C21D1/02 ,  C21D7/13 ,  C21D8/00 ,  C21D2211/002 ,  C21D2211/008 ,  Y10S148/909

Abstract: A method for processing a hot formed, high-tensile-strength steel having an ultimate tensile strength (UTS) of at least about 730 MPa (105 ksi) and excellent toughness to retain essentially all the strength and toughness is provided. This processing is needed for the fabrication of high strength fittings that are used in the construction of linepipe for transport of natural gas, crude oil, as well as other applications. Furthermore, the hot formed high strength steel may be weldable with a Pcm of less than or equal to 0.35.

Abstract translation: 提供了一种用于处理具有至少约730MPa（105ksi）的极限拉伸强度（UTS）和优异韧性以保持基本上所有强度和韧性的热成型的高拉伸强度钢的方法。 这种加工是制造用于天然气，原油以及其他应用的运输管线管道中使用的高强度配件所必需的。 此外，热成型的高强度钢可以以小于或等于0.35的Pcm可焊接。

公开(公告)号：US6066212A

公开(公告)日：2000-05-23

申请号：US099152

申请日：1998-06-18

Applicant: Jayoung Koo ,  Narasimha-Rao V. Bangaru

Inventor： Jayoung Koo ,  Narasimha-Rao V. Bangaru

IPC: C21D1/02 ,  C21D1/19 ,  C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/58

CPC classification number: C21D1/02 ,  C21D1/19 ,  C21D8/0226 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: An ultra-high strength, weldable, low alloy, dual phase steel with excellent cryogenic temperature toughness in the base plate and in the heat affected zone (HAZ) when welded, having a tensile strength greater than 830 MPa (120 ksi) and a microstructure comprising a ferrite phase and a second phase of predominantly lath martensite and lower bainite, is prepared by heating a steel slab comprising iron and specified weight percentages of some or all of the additives carbon, manganese, nickel, nitrogen, copper, chromium, molybdenum, silicon, niobium, vanadium, titanium, aluminum, and boron; reducing the slab to form plate in one or more passes in a temperature range in which austenite recrystallizes; further reducing the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar.sub.3 transformation temperature; finish rolling the plate between the Ar.sub.3 transformation temperature and the Ar.sub.1 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature (QST); and stopping the quenching.

Abstract translation: 一种超高强度，可焊接，低合金，双相钢在焊接时在基板和热影响区（HAZ）中具有优异的低温韧性，拉伸强度大于830MPa（120ksi）和显微组织 包括铁素体相和主要是板条马氏体和下贝氏体的第二相，通过加热包括铁的钢坯和特定重量百分比的一些或所有添加剂碳，锰，镍，氮，铜，铬，钼， 硅，铌，钒，钛，铝和硼; 在奥氏体重结晶的温度范围内，在一次或多次通过时，将板坯还原成板; 在低于奥氏体再结晶温度和高于Ar3转变温度的温度范围内，在一个或多个道次中进一步减少板; 在Ar3转变温度和Ar1转变温度之间对板进行精轧; 将精轧板淬火至合适的淬火停止温度（QST）; 并停止淬火。

公开(公告)号：US5531842A

公开(公告)日：1996-07-02

申请号：US349856

申请日：1994-12-06

Applicant: Jayoung Koo ,  Michael J. Luton

Inventor： Jayoung Koo ,  Michael J. Luton

IPC: C21D8/12 ,  C21D6/02 ,  C21D7/12 ,  C21D8/02 ,  C21D8/10 ,  C22C38/00 ,  C22C38/14 ,  C22C38/38

CPC classification number: C21D6/02 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D7/12 ,  C21D8/10

Abstract: A high strength steel composition comprising ferrite and martensite/bainite phases, the ferrite phase having primarily vanadium and niobium carbide or carbonitride precipitates, is prepared by a first rolling above the austenite recrystallization temperature, a second rolling below the austenite recrystallization temperature; cooling between the Ar.sub.3 transformation point and 500.degree. C.; and water cooling to below about 400.degree. C.

Abstract translation: 通过在奥氏体再结晶温度以上的第一次轧制，奥氏体再结晶温度以下的第二次轧制，制备包含铁素体和马氏体/贝氏体相的高强度钢组合物，主要为钒和碳化铌或碳氮化物析出物的铁素体相。 在Ar3相变点和500℃之间冷却。 并将水冷却至低于约400℃。

公开(公告)号：US09896748B2

公开(公告)日：2018-02-20

申请号：US13361774

申请日：2012-01-30

Applicant: Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Swarupa Soma Bangaru ,  Hyun-Woo Jin ,  Adnan Ozekcin ,  Raghavan Ayer ,  Douglas P. Fairchild ,  Danny L. Beeson ,  Douglas S. Hoyt ,  James B. LeBleu, Jr. ,  Shigeru Endo ,  Mitsuhiro Okatsu ,  Shinichi Kakihara ,  Moriyasu Nagae

Inventor： Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Hyun-Woo Jin ,  Adnan Ozekcin ,  Raghavan Ayer ,  Douglas P. Fairchild ,  Danny L. Beeson ,  Douglas S. Hoyt ,  James B. LeBleu, Jr. ,  Shigeru Endo ,  Mitsuhiro Okatsu ,  Shinichi Kakihara ,  Moriyasu Nagae

IPC: C21D8/10 ,  C22C38/02 ,  C21D6/00 ,  C21D8/02 ,  C21D9/14 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

CPC classification number: C22C38/02 ,  C21D6/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/14 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: A steel composition and method from making a dual phase steel therefrom. The dual phase steel may have carbon of about 0.05% by weight to about 0.12 wt %; niobium of about 0.005 wt % to about 0.03 wt %; titanium of about 0.005 wt % to about 0.02 wt %; nitrogen of about 0.001 wt % to about 0.01 wt %; silicon of about 0.01 wt % to about 0.5 wt %; manganese of about 0.5 wt % to about 2.0 wt %; and a total of molybdenum, chromium, vanadium and copper less than about 0.15 wt %. The steel may have a first phase consisting of ferrite and a second phase having one or more of carbide, pearlite, martensite, lower bainite, granular bainite, upper bainite, and degenerate upper bainite. A solute carbon content in the first phase may be about 0.01 wt % or less.