公开(公告)号：US5716465A

公开(公告)日：1998-02-10

申请号：US649701

申请日：1996-08-27

申请人： Takuya Hara ,  Asahi Hitoshi ,  Hiroshi Tamehiro ,  Taro Muraki ,  Akira Kawakami

发明人： Takuya Hara ,  Asahi Hitoshi ,  Hiroshi Tamehiro ,  Taro Muraki ,  Akira Kawakami

IPC分类号： C21D1/18 ,  C21D8/02 ,  C22C38/42

CPC分类号： C22C38/42 ,  C21D8/0205 ,  C21D1/18 ,  C21D2211/008

摘要： A high-corrosion-resistant martensitic stainless steel possessing excellent weldability and SSC resistance, having a tempered martensitic structure, characterized by comprising steel constituents satisfying by weight C: 0.005 to 0.035%, Si: not more than 0.50%, Mn: 0.1 to 1.0%, P: not more than 0.03%, S: not more than 0.005%, Mo: 1.0 to 3.0%, Cu: 1.0 to 4.0%, Ni: 1.5 to 5.0%, Al: not more than 0.06%, N: not more than 0.01%, and Cr satisfying a requirement represented by the formula 13>Cr+1.6Mo.gtoreq.8, C+N.gtoreq.0.03, 40C+34N+Ni+0.3Cu-1.1Cr-1.8 Mo.gtoreq.10, or further comprising at least one element selected from the group consisting of Ti: 0.05 to 0.1%, Zr: 0.01 to 0.2%, Ca: 0.001 to 0.02%, and REM: 0.003 to 0.4%, with the balance consisting essentially of Fe. A process for producing a martensitic stainless steel, comprising the steps of: subjecting a steel plate, produced by hot-rolling a stainless steel slab having the above composition, to austenitization at a temperature of Ac.sub.3 point to 1000.degree. C. to harden the steel plate; subjecting the hardened steel plate to final tempering at a temperature of 550.degree. C. to Ac.sub.1 point; and cold-rolling the steel plate.

摘要翻译： PCT No.PCT / JP95 / 01950 Sec。 371日期：1996年8月27日 102（e）日期1996年8月27日PCT提交1995年9月27日PCT公布。 公开号WO96 / 10654 日期1996年4月11日具有回火马氏体组织的耐焊接性和耐SSC性优异的高耐腐蚀马氏体系不锈钢，其特征在于，含有C：0.005〜0.035％，Si：0.50％以下， Mn：0.1〜1.0％，P：0.03％以下S：0.005％以下，Mo：1.0〜3.0％，Cu：1.0〜4.0％，Ni：1.5〜5.0％，Al：0.06以下 ％，N：0.01以下，Cr满足式13> Cr + 1.6Mo> / = 8，C + N> = 0.03,40C + 34N + Ni + 0.3Cu-1.1Cr- 或者还包含选自Ti：0.05〜0.1％，Zr：0.01〜0.2％，Ca：0.001〜0.02％，REM：0.003〜0.4％的至少一种元素，与 余量基本上由Fe组成。 一种马氏体不锈钢的制造方法，其特征在于，包括以下步骤：将具有上述组成的不锈钢板进行热轧制成的钢板在Ac 3点〜1000℃的温度下进行奥氏体化，使钢 盘子; 使淬火钢板在550℃至Ac1点的温度下进行最终回火; 并冷轧钢板。

公开(公告)号：US5183198A

公开(公告)日：1993-02-02

申请号：US793959

申请日：1991-11-15

申请人： Hiroshi Tamehiro ,  Yoshinori Ogata ,  Yoshio Terada

发明人： Hiroshi Tamehiro ,  Yoshinori Ogata ,  Yoshio Terada

IPC分类号： B21B1/38 ,  B21B3/02 ,  B21B47/00 ,  B23K9/00 ,  B23K20/04 ,  B23K20/227 ,  C22C38/00 ,  C22C38/14

CPC分类号： B23K20/227 ,  B21B2001/383 ,  B21B3/02 ,  Y10T428/12937 ,  Y10T428/12965

摘要： A method of producing clad steel plate comprises the steps of preparing an assembly slab by superposing a stainless-steel or nickel alloy cladding material onto base metal consisting essentially of, by weight, 0.020 to 0.06% carbon, 0.5% or less silicon, 1.0 to 1.8% manganese, 0.03% or less phosphorus, 0.005% or less sulfur, 0.08 to 0.15% niobium, 0.005 to 0.03% titanium, 0.05% or less aluminum, 0.002 to 0.006% nitrogen, and one or two elements selected from among a group consisting of 0.05 to 1.0% nickel, 0.05 to 1.0% copper, 0.05 to 0.5% chromium, 0.05 to 0.3% molybdenum and 0.001 to 0.005% calcium, with the balance being iron and unavoidable impurities, and welding its periphery; heating the slab to 1100.degree. to 1250.degree. C.; rolling the slab at a reduction ratio of 5 or more and a rolling finish temperature of 900.degree. to 1050.degree. C.; air cooling for 60 to 200 seconds; cooling the slab from a temperature of at least 750.degree. C. to 555.degree. C. or below at a cooling rate of 5.degree. to 40.degree. C./sec, and following this by air cooling.

公开(公告)号：US4219371A

公开(公告)日：1980-08-26

申请号：US27393

申请日：1979-04-05

申请人： Hajime Nakasugi ,  Masana Imagumbai ,  Hiroshi Tamehiro

发明人： Hajime Nakasugi ,  Masana Imagumbai ,  Hiroshi Tamehiro

IPC分类号： C22C38/00 ,  C21D8/02 ,  C21D9/52 ,  C22C38/04 ,  C21D7/14

CPC分类号： C21D8/0226 ,  C22C38/04 ,  C21D2211/002

摘要： A process for producing high-tension bainitic steel having high-toughness and excellent weldability by subjecting a bainitic steel of a specific composition to a low-temperature heating and subsequently rolling the steel under specific conditions.

摘要翻译： 通过对特定组成的贝氏体钢进行低温加热，随后在特定条件下进行轧制，制造具有高韧性和优异焊接性的高张力贝氏体钢的方法。

公开(公告)号：US06264760B1

公开(公告)日：2001-07-24

申请号：US09123625

申请日：1998-07-28

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

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

IPC分类号： C22C3808

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

摘要： 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.

摘要翻译： 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：US5798004A

公开(公告)日：1998-08-25

申请号：US714098

申请日：1997-01-14

申请人： Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

发明人： Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

IPC分类号： C21D8/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/48

CPC分类号： C21D8/0226 ,  C22C38/04 ,  C21D2211/002 ,  C21D2211/008 ,  C21D8/0263

摘要： This invention adds elements such as Cu, B, Cr, Ca, V, etc., to a low carbon-high Mn--Ni--Mo-trace Ti type steel, and allows the steel to have a tempered martensite/bainite mixed structure containing at least 60% of tempered martensite transformed from un-recrystallized austenite having a mean austenite grain size (d.gamma.) of not greater than 10 .mu.m as a micro-structure, or a tempered martensite structure containing at least 90% of martensite transformed from un-recrystallized austenite. The present invention further stipulates a P value to the range of 1.9 to 4.0 and thus provides a ultra-high strength steel having a tensile strength of at least 950 MPa (not lower than 100 of the API standard) and excellent in low temperature toughness, HAZ toughness and field weldability in cold districts.

摘要翻译： PCT No.PCT / JP96 / 00155 Sec。 371日期1997年1月14日 102（e）1997年1月14日PCT PCT 1996年1月26日PCT公布。 公开号WO96 / 23083 日期1996年8月1日本发明将诸如Cu，B，Cr，Ca，V等的元素添加到低碳高Mn-Ni-Mo-Trace Ti型钢中，并允许钢具有回火马氏体 或含有至少60％的平均奥氏体晶粒尺寸（dγ）不大于10μm的未再结晶奥氏体作为微结构的回火马氏体的贝氏体混合结构，或包含至少90°的回火马氏体组织 从未再结晶奥氏体转变的马氏体的％。 本发明进一步规定P值在1.9〜4.0的范围内，由此提供抗拉强度为至少950MPa（API标准的100以上），低温韧性优异的超高强度钢， 冷区的HAZ韧性和现场焊接性。

公开(公告)号：US4521258A

公开(公告)日：1985-06-04

申请号：US562250

申请日：1983-12-16

申请人： Hiroshi Tamehiro ,  Hiroo Mazuda ,  Mamoru Ohashi ,  Yasumitsu Onoe

发明人： Hiroshi Tamehiro ,  Hiroo Mazuda ,  Mamoru Ohashi ,  Yasumitsu Onoe

IPC分类号： C22C38/00 ,  C21D8/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/14

CPC分类号： C22C38/04 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/005

摘要： Due to increasing demands for steel to be used for construction such as buildings, pressure vessels, pipe lines or the like, various kinds of high tension steels, particularly steels suitable for welding have increasingly been developed.Heretofore, proposed methods of making such high tension steel have relied on so-called cold rolling and/or rolling followed by quenching and tempering, however, these conventional steels have suffered from drawbacks such as a tempering step indispensable after quenching, softening of welded zone and lack of uniformity in the metal structure in the direction of plate thickness.A compositional feature of the new method resides in addition of minor amounts of Ti and B along with Nb as contributing to grain refining or precipitation hardening elements in addition to limited amounts of other ingredients such as C, Si, Mn, S, Al and N.Further addition of at least one of V, Ni, Cu, Cr, Mo, Ca and REM also acts to improve the properties of the steel.The steel prepared to have the aforesaid composition is subjected to controlled heating, subsequent rolling under prescribed rolling reduction ratio, temperature for terminating rolling and to a specified cooling rate.The steel plate thus processed has a structure having fine bainite grains alone or a duplex grain structure consisting of fine bainite and fine ferrite particularly finer toward the surface so as to satisfy both ductility and toughness without tempering operation and displays good weldability and toughness even at a welded zone as well as stable hardness distribution throughout the plate thickness.

摘要翻译： 由于对诸如建筑物，压力容器，管线等的建筑用钢的需求日益增加，因此越来越多地开发出各种高张力钢，特别是适用于焊接的钢。 迄今为止，所提出的制造这种高张力钢的方法依赖于所谓的冷轧和/或轧制，随后进行淬火和回火，然而，这些常规钢已经具有淬火后不可缺少的回火步骤，焊接区软化 并且金属结构在板厚方向上缺乏均匀性。 除了有限量的其他成分如C，Si，Mn，S，Al和N之外，新方法的组成特征是除了少量的Ti和B以及Nb之外还有助于晶粒细化或沉淀硬化元素 进一步添加V，Ni，Cu，Cr，Mo，Ca和REM中的至少一种也用于改善钢的性能。 将制备成具有上述组成的钢进行受控加热，随后在规定的滚动压下率，终轧的温度和规定的冷却速度下进行轧制。 这样加工的钢板具有单独的贝氏体细晶粒或由细贝氏体和细小铁氧体构成的双相晶粒结构，特别是在表面上更细，以便在不进行回火操作的情况下既满足延展性又具有韧性，即使在 焊接区域以及整个板厚度的稳定的硬度分布。

公开(公告)号：US06248191B1

公开(公告)日：2001-06-19

申请号：US09123858

申请日：1998-07-28

申请人： Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Masaaki Sugiyama

发明人： Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Masaaki Sugiyama

IPC分类号： C21D800

CPC分类号： C21D6/005 ,  C21D1/19 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008

摘要： A method is provided for producing an ultra-high strength steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), 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. A steel slab is heated to a suitable temperature; the slab is reduced to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; said plate is further reduced 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; said plate is quenched to a suitable Quench Stop Temperature; and said quenching is stopped and said plate is allowed to air cool to ambient temperature.

摘要翻译： 提供一种制造抗拉强度为至少约900MPa（130ksi）的超高强度钢，-40℃下通过夏比V-缺口冲击试验测得的韧性的方法（-40°F） ）至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的主要由细晶粒的下贝氏体，细粒状板条马氏体或其混合物组成的微结构， 添加剂：碳，硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁。 将钢坯加热到合适的温度; 在奥氏体再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; 所述板在一个或多个热轧道中在低于所述第一温度范围和高于在冷却期间奥氏体开始转变为铁素体的温度的温度范围内进一步减小; 所述板淬火至合适的淬火停止温度; 并且停止淬火，并使所述板空气冷却至环境温度。

公开(公告)号：US06228183B1

公开(公告)日：2001-05-08

申请号：US09123791

申请日：1998-07-28

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

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

IPC分类号： C22C3814

CPC分类号： C22C38/06 ,  C21D1/19 ,  C21D8/00 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： An ultra-high strength boron-containing steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), 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.

摘要翻译： 具有至少约900MPa（130ksi）拉伸强度的超高强度含硼钢，在-40℃（-40°F）下通过夏比V-缺口冲击试验测得的韧性 至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的添加剂的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：碳 通过将钢坯加热到合适的温度来制备硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁， 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：US5723089A

公开(公告)日：1998-03-03

申请号：US824079

申请日：1997-03-24

申请人： Rikio Chijiiwa ,  Hiroyuki Ogawa ,  Koichi Shinada ,  Yoshinori Ogata ,  Hiroshi Tamehiro ,  Hajime Ishikawa ,  Isamu Kimoto ,  Yoshio Terada

发明人： Rikio Chijiiwa ,  Hiroyuki Ogawa ,  Koichi Shinada ,  Yoshinori Ogata ,  Hiroshi Tamehiro ,  Hajime Ishikawa ,  Isamu Kimoto ,  Yoshio Terada

IPC分类号： B23K35/02 ,  B23K35/30 ,  C22C38/28

CPC分类号： B23K35/3053 ,  B23K35/0261 ,  B23K35/3066 ,  B23K35/308 ,  Y10S148/909

摘要： A wire for gas metal arc welding containing 0.01 to 0.06 wt % of C, 0.10 to 0.60 wt % of Si, 0.9 to 3.1 wt % of Mn, 0.7 to 2.0 wt % of Cr, 0.005 to 0.06% of Ti, not greater than 0.08 wt % of Al and if necessary, 0.05 to 0.30 wt % of Cu, and the balance of Fe and unavoidable impurities. This wire improves the selective corrosion resistance and the low temperature toughness of the resulting weld metal, and is particularly suitable for circumferential welding of line pipes for transporting CO.sub.2 -containing petroleum, natural gases or CO.sub.2.

摘要翻译： 含有C：0.01〜0.06重量％，Si：0.10〜0.60重量％，Mn：0.9〜3.1重量％，Cr：0.7〜2.0重量％，Ti：0.005〜0.06重量％ 0.08重量％的Al，如果需要，为0.05〜0.30重量％的Cu，余量为Fe和不可避免的杂质。 该线材提高了所得到的焊接金属的选择性腐蚀性和低温韧性，特别适用于输送含CO 2的石油，天然气或二氧化碳的管线的周向焊接。

公开(公告)号：USRE31251E

公开(公告)日：1983-05-24

申请号：US207068

申请日：1980-11-14

申请人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

发明人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D9/52

CPC分类号： C21D8/0226 ,  C21D8/021 ,  C21D8/0263

摘要： The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C. and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C. after the hot rolling.