公开(公告)号：US06264760B1

公开(公告)日：2001-07-24

申请号：US09123625

申请日：1998-07-28

Applicant: Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada ,  Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen

Inventor： Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada ,  Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen

IPC: C22C3808

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

Abstract: An ultra-high strength steel having excellent ultra-low temperature toughness, a tensile strength of at least about 930 MPa (135 ksi), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium, is prepared by heating a steel slab to a suitable temperature; reducing the slab to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; further reducing said plate in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; quenching said plate to a suitable Quench Stop Temperature; and stopping said quenching and allowing said plate to air cool to ambient temperature.

Abstract translation: 具有优异的超低温韧性，至少约930MPa（135ksi）的拉伸强度和主要包含细粒度的下贝氏体，细粒状板条马氏体或其混合物的微观结构的超高强度钢被转化 来自基本上未再结晶的奥氏体晶粒并且包含铁和指定重量百分比的添加剂：碳，硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁，由 将钢板加热到合适的温度; 在奥氏体重结晶的第一温度范围内，在一个或多个热轧道中将板坯还原成板; 在低于所述第一温度范围的第二温度范围内并且高于在冷却期间奥氏体开始转变为铁素体的温度的一个或多个热轧道中进一步减少所述板; 将所述板淬火至合适的淬火停止温度; 并停止所述淬火并允许所述板空气冷却至环境温度。

公开(公告)号：US06254698B1

公开(公告)日：2001-07-03

申请号：US09215773

申请日：1998-12-19

Applicant: Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Glen A. Vaughn ,  Raghavan Ayer

Inventor： Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Glen A. Vaughn ,  Raghavan Ayer

IPC: C21D802

CPC classification number: C21D6/001 ,  C21D1/19 ,  C21D1/20 ,  C21D7/13 ,  C21D8/02 ,  C21D8/0226 ,  C21D9/0068 ,  C21D9/08 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: An ultra-high strength, weldable, low alloy 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 about 830 MPa (120 ksi) and a microstructure comprising (i) predominantly fine-grained lower bainite, fine-grained lath martensite, fine granular bainite (FGB), or mixtures thereof, and (ii) up to about 10 vol % retained austenite, 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; finish rolling the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar3 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature (QST); stopping the quenching; and either, for a period of time, holding the plate substantially isothermally at the QST or slow-cooling the plate before air cooling, or simply air cooling the plate to ambient temperature.

Abstract translation: 在焊接时，在底板和热影响区（HAZ）中具有优异的低温韧性的超高强度，可焊接的低合金钢，具有大于约830MPa（120ksi）的拉伸强度和包含（ i）主要是细粒度的下贝氏体，细粒状板条马氏体，细粒状贝氏体（FGB）或其混合物，和（ii）高达约10体积％的残余奥氏体，通过加热包括铁和指定的钢板 碳，锰，镍，氮，铜，铬，钼，硅，铌，钒，钛，铝和硼中的一些或所有添加剂的重量百分数。 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且高于Ar3转变温度的温度范围内，在一个或多个道次中对板进行精轧; 将精轧板淬火至合适的淬火停止温度（QST）; 停止淬火 并且在一段时间内，在空气冷却之前将板保持基本上等温，或者在空气冷却之前缓慢冷却板，或者简单地将板空气冷却至环境温度。

公开(公告)号：US06251198B1

公开(公告)日：2001-06-26

申请号：US09099153

申请日：1998-06-18

Applicant: Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Glen A. Vaughn

Inventor： Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Glen A. Vaughn

IPC: C22C3808

CPC classification number: C21D6/001 ,  C21D1/19 ,  C21D1/20 ,  C21D8/0226 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: An ultra-high strength, weldable, low alloy steel with excellent cryogenic temperature toughness in the base plate and in the heat affected zone (HAZE) when welded, having a tensile strength greater than 830 MAP (120 KS) and a micro-laminate microstructure comprising austenite film layers and fine-grained marten site/lower bainite laths, 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; finish rolling the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar3 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature (QST); stopping the quenching; and either, for a period of time, holding the plate substantially isothermally at the QST or slow-cooling the plate before air cooling, or simply air cooling the plate to ambient temperature.

Abstract translation: 一种超高强度，可焊接的低合金钢，其在焊接时在底板和热影响区（HAZE）中具有优异的低温韧性，具有大于830MAC（120KS）的拉伸强度和微层压结构 包括奥氏体膜层和细粒度马氏体/下贝氏体板条，通过加热包括铁的钢板和指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且高于Ar3转变温度的温度范围内，在一个或多个道次中对板进行精轧; 将精轧板淬火至合适的淬火停止温度（QST）; 停止淬火 并且在一段时间内，在空气冷却之前将板保持基本上等温，或者在空气冷却之前缓慢冷却板，或者简单地将板空气冷却至环境温度。

公开(公告)号：US5653826A

公开(公告)日：1997-08-05

申请号：US477008

申请日：1995-06-07

Applicant: Jayoung Koo ,  Michael John Luton

Inventor： Jayoung Koo ,  Michael John Luton

IPC: C21D6/02 ,  C21D7/12 ,  C21D8/02 ,  C21D8/10 ,  C22C38/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  B32B15/18

CPC classification number: C22C38/14 ,  C21D6/02 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D7/12 ,  C21D8/10

Abstract: A high strength steel composition comprising ferrite and martensite/banite phases, the ferrite phase having primarily vanadium and mobium carbide or carbonitride precipitates, is prepared by a first rolling above the austenite recrystallization temperature; a second rolling below the anstenite recrystallization temperature; a third rolling between the Ar.sub.3 and Ar.sub.1 transformation points, and water cooling to below about 400.degree. C.

Abstract translation: 通过在奥氏体再结晶温度以上进行第一次轧制，制备了包含铁素体和马氏体/银相的高强度钢组合物，主要为钒和碳化铁或碳氮化物析出物的铁素体相; 第二次在低钙钛矿再结晶温度以下滚动; Ar3和Ar1相变点之间的第三次滚动，水冷至低于约400℃。

公开(公告)号：US08691030B2

公开(公告)日：2014-04-08

申请号：US12600949

申请日：2008-05-02

Applicant: Dylan V. Pugh ,  Joseph C. Bondos ,  Shiun Ling ,  Raghavan Ayer ,  Shalawn K. Jackson ,  Jayoung Koo ,  Swarupa S. Bangaru

Inventor： Dylan V. Pugh ,  Joseph C. Bondos ,  Shiun Ling ,  Raghavan Ayer ,  Shalawn K. Jackson ,  Narasimha-Rao V. Bangaru ,  Jayoung Koo

IPC: C22C38/46 ,  C22C38/28 ,  C21D1/18 ,  C21D6/00

CPC classification number: C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18

Abstract: The present application describes a steel composition that provides enhanced corrosion resistance. This steel composition includes one of vanadium in an amount of 1 wt % to 9 wt %, titanium in an amount of about 1 wt % to 9 wt %, and a combination of vanadium and titanium in an amount of 1 wt % to about 9 wt %. In addition, the steel composition includes carbon in an amount of 0.03 wt % to about 0.45 wt %, manganese in an amount up to 2 wt % and silicon in an amount up to 0.45 wt %. In one embodiment, the steel composition includes a microstructure of one of the following: ferrite, martensite, tempered martensite, dual phase ferrite and martensite, and dual phase ferrite and tempered martensite. Further, the present application describes a method for processing the steel composition and use of equipment such as oil country tubular goods, fabricated with the steel composition.

Abstract translation: 本申请描述了提供增强的耐腐蚀性的钢组合物。 该钢组合物包括1重量％至9重量％的钒中的一种，约1重量％至9重量％的钛，以及1重量％至约9重量％的钒和钛的组合 重量％。 此外，钢组合物包括0.03重量％至约0.45重量％的碳，最多达2重量％的锰和至多0.45重量％的硅。 在一个实施方案中，钢组合物包括以下之一的微结构：铁素体，马氏体，回火马氏体，双相铁素体和马氏体，以及双相铁素体和回火马氏体。 此外，本申请描述了用钢组合物制造的用于加工钢组合物和使用诸如油井筒状物品的设备的方法。

公开(公告)号：US20090301613A1

公开(公告)日：2009-12-10

申请号：US12418767

申请日：2009-04-06

Applicant: Jayoung Koo ,  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 ,  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

IPC: C21D9/08 ,  C21D8/02 ,  C21D1/70 ,  C22C38/00 ,  C22C38/08

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.

Abstract translation: 从其制造双相钢的钢组合物和方法。 双相钢可以具有约0.05重量％至约0.12重量％的碳; 约0.005重量％至约0.03重量％的铌; 约0.005重量％至约0.02重量％的钛; 约0.001重量％至约0.01重量％的氮; 约0.01重量％至约0.5重量％的硅; 约0.5重量％至约2.0重量％的锰; 以及少于约0.15重量％的钼，铬，钒和铜的总和。 钢可以具有由铁素体构成的第一相和具有碳化物，珠光体，马氏体，下贝氏体，粒状贝氏体，上贝氏体和退化的上贝氏体中的一种或多种的第二相。 第一相中的溶质碳含量可以为约0.01重量％以下。

公开(公告)号：US07501090B2

公开(公告)日：2009-03-10

申请号：US11642407

申请日：2006-12-20

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

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

IPC: B22F7/04 ,  B05D7/22

CPC classification number: C22C29/12 ,  C22C32/0015 ,  C22C32/0026 ,  C23C30/00 ,  Y10T428/12007

Abstract: One embodiment of 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 Al, Si, Mg, Ca, Y, Fe, Mn, Group IV, Group V, Group VI elements, and mixtures thereof, Q is oxide, R is a base 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 and Si and at least one reactive wetting element selected from the group consisting of Ti, Zr, Hf, Ta, Sc, Y, La, and Ce.

Abstract translation: 本发明的一个实施方案包括由式（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Al，Si， Mg，Ca，Y，Fe，Mn，IV族，V族，VI族元素及其混合物，Q为氧化物，R为选自Fe，Ni Co，Mn的贱金属及其混合物，S 基本上由选自Cr，Al和Si中的至少一种元素和至少一种选自Ti，Zr，Hf，Ta，Sc，Y，La和Ce的反应性润湿元素组成。

公开(公告)号：US20080268230A1

公开(公告)日：2008-10-30

申请号：US11641221

申请日：2006-12-19

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

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

IPC: B32B5/16 ,  B32B15/00

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.

公开(公告)号：US07438741B1

公开(公告)日：2008-10-21

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: C22C29/06

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 6 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：US20080245183A1

公开(公告)日：2008-10-09

申请号：US11642407

申请日：2006-12-20

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

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

IPC: B22F1/00

CPC classification number: C22C29/12 ,  C22C32/0015 ,  C22C32/0026 ,  C23C30/00 ,  Y10T428/12007

Abstract: One embodiment of 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 Al, Si, Mg, Ca, Y, Fe, Mn, Group IV, Group V, Group VI elements, and mixtures thereof, Q is oxide, R is a base 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 and Si and at least one reactive wetting element selected from the group consisting of Ti, Zr, Hf, Ta, Sc, Y, La, and Ce.

Abstract translation: 本发明的一个实施方案包括由式（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Al，Si， Mg，Ca，Y，Fe，Mn，IV族，V族，VI族元素及其混合物，Q为氧化物，R为选自Fe，Ni Co，Mn的贱金属及其混合物，S 基本上由选自Cr，Al和Si中的至少一种元素和至少一种选自Ti，Zr，Hf，Ta，Sc，Y，La和Ce的反应性润湿元素组成。