公开(公告)号：US20140086787A1

公开(公告)日：2014-03-27

申请号：US13792458

申请日：2013-03-11

申请人： Suguhiro Fukushima ,  Manabu Eto ,  Tamotsu Sasaki ,  Kaori Kawano ,  Masayuki Wakita

发明人： Suguhiro Fukushima ,  Manabu Eto ,  Tamotsu Sasaki ,  Kaori Kawano ,  Masayuki Wakita

IPC分类号： C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/04

CPC分类号： C22C38/06 ,  B21B1/38 ,  B21B3/00 ,  C21D8/02 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04

摘要： A method for manufacturing a hot-rolled sheet attains grain refinement of the steel sheet whose grain size is extremely fine. In particular, a ferrite grain size of less than average 2 μm is obtained, which is not laminar but has ferrite grains with equiaxed morphology and exhibits high formability in forming. The method comprises the steps of rolling and cooling, wherein the rolling reductions, cooling steps, and temperature are closely regulated. A hot rolled sheet made from the method of manufacturing has a controlled ferrite grain in different regions of sheet thickness.

摘要翻译： 热轧板的制造方法可以获得晶粒细化的钢板的晶粒细化。 特别地，得到小于2μm的铁素体晶粒尺寸，其不是层状的，而是具有等轴形态的铁素体晶粒，并且在成型时表现出高的成形性。 该方法包括滚动和冷却的步骤，其中滚动减少，冷却步骤和温度被严格地调节。 由制造方法制成的热轧板在板厚不同的区域具有受控的铁素体晶粒。

公开(公告)号：US07935303B2

公开(公告)日：2011-05-03

申请号：US12073324

申请日：2008-03-04

申请人： Takashi Nakashima ,  Kaori Kawano ,  Masaaki Igarashi

发明人： Takashi Nakashima ,  Kaori Kawano ,  Masaaki Igarashi

IPC分类号： C22C38/00 ,  C22C38/22

CPC分类号： C21C7/0006 ,  C21C7/06 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

摘要： According to a low alloy steel of the present invention, compositional elements thereof are limited, and a metal structure thereof comprises bainite or martensite. Further, proper amounts of Nd inclusions are formed by appropriately selecting timings of deoxidation and Nd addition in melting a steel. Consequently, compatibility between high-temperature creep strength and long-term creep ductility, which is hardly established in conventional steels, can be achieved even in hostile conditions. Accordingly, the low alloy steel of the present invention can be widely applied as the material for the heat-resistant structural member used for a long time under the high-temperature and high-pressure conditions such as power plant boilers, turbines, and nuclear power plants.

摘要翻译： 根据本发明的低合金钢，其组成元素受到限制，其金属结构包括贝氏体或马氏体。 此外，通过在钢中熔融时适当选择脱氧和Nd添加的定时，形成适量的Nd夹杂物。 因此，即使在恶劣的条件下，也可以实现在常规钢中难以确定的高温蠕变强度与长期蠕变延展性之间的相容性。 因此，本发明的低合金钢可以广泛地用作在高温高压条件下长时间使用的耐火构件的材料，例如发电厂锅炉，涡轮机和核能 植物。

公开(公告)号：US20100209283A1

公开(公告)日：2010-08-19

申请号：US12768216

申请日：2010-04-27

申请人： Toshirou Tomida ,  Norio Imai ,  Mitsuru Yoshida ,  Kaori Kawano ,  Masayuki Wakita ,  Tamotsu Toki ,  Masanori Yasuyama ,  Hitomi Nishibata

发明人： Toshirou Tomida ,  Norio Imai ,  Mitsuru Yoshida ,  Kaori Kawano ,  Masayuki Wakita ,  Tamotsu Toki ,  Masanori Yasuyama ,  Hitomi Nishibata

IPC分类号： C22C38/40 ,  C22C38/04 ,  C22C38/12 ,  C22C38/00

CPC分类号： C23C2/40 ,  B32B15/012 ,  B32B15/013 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0405 ,  C21D8/0463 ,  C21D9/46 ,  C21D9/50 ,  C21D2201/03 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C18/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/06 ,  C23C2/28

摘要： A steel sheet excellent in mechanical strength, workability and thermal stability and suited for use as a raw material in such fields of manufacturing automobiles, household electric appliances and machine structures and of constructing buildings, and a manufacturing method thereof are provided. The steel sheet is a hot-rolled steel sheet of carbon steel or low-alloy steel, the main phase of which is ferrite, and is characterized in that the average ferrite crystal grain diameter D (μm) at the depth of ¼ of the sheet thickness from the steel sheet surface satisfies the relations respectively defined by the formulas (1) and (2) given below and the increase rate X (μm/min) in average ferrite crystal grain diameter at 700° C. at the depth of ¼ of the sheet thickness from the steel sheet surface and said average crystal grain diameter D (μm) satisfy the relation defined by the formula (3) given below: 1.2≦D≦7  formula (1) D≦2.7+5000/(5+350.C+40.Mn)2  formula (2) D·X≦0.1  formula (3) wherein C and Mn represent the contents (in % by mass) of the respective elements in the steel.

摘要翻译： 提供了机械强度，可加工性和热稳定性优异且适用于制造汽车，家用电器和机器结构以及建筑物的领域中的原料的钢板及其制造方法。 该钢板是碳素钢或低合金钢的热轧钢板，其主相是铁素体，其特征在于，在片材的1/4深度处的平均铁素体晶粒直径D（μm） 从钢板表面的厚度满足下面给出的式（1）和（2）所定义的关系，并且在700℃的平均铁素体晶粒直径的增加速率X（μm/ min）在深度为1/4 钢板表面的平均厚度和所述平均晶粒直径D（μm）满足以下公式（3）所定义的关系：1.2＆nlE; D＆nlE; 7式（1）D＆nlE; 2.7 + 5000 /（5+ 350.C + 40.Mn）2式（2）D·X＆nlE; 0.1式（3）其中C和Mn表示钢中各元素的含量（质量％）。

公开(公告)号：US20100166594A1

公开(公告)日：2010-07-01

申请号：US12647028

申请日：2009-12-24

申请人： Hiroyuki Hirata ,  Atsuro Iseda ,  Hirokazu Okada ,  Hiroyuki Semba ,  Kaori Kawano ,  Osamu Miyahara

发明人： Hiroyuki Hirata ,  Atsuro Iseda ,  Hirokazu Okada ,  Hiroyuki Semba ,  Kaori Kawano ,  Osamu Miyahara

IPC分类号： C22C19/05 ,  C22C30/04 ,  C22C30/00 ,  C22C30/06

CPC分类号： C22C38/44 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  F22B37/04

摘要： An austenitic heat resistant alloy, which comprises, by mass percent, C≦0.15%, Si≦2%, Mn≦3%, Ni: 40 to 80%, Cr: 15 to 40%, W and Mo: 1 to 15% in total content, Ti≦3%, Al≦3%, N≦0.03%, O≦0.03%, with the balance being Fe and impurities, and among the impurities P≦0.04%, S≦0.03%, Sn≦0.1%, As≦0.01%, Zn≦0.01%, Pb≦0.01% and Sb≦0.01%, and satisfies the conditions [P1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}≦0.050], [0.2≦P2=Ti+2Al≦7.5−10×P1], [P2≦9.0−100×O] and [N≦0.002×P2+0.019] can prevent both the liquation crack in the HAZ and the brittle crack in the HAZ and also can prevent defects due to welding fabricability, which occur during welding fabrication, and moreover has excellent creep strength at high temperatures. Therefore, the alloy can be used suitably as a material for constructing high temperature machines and equipment, such as power generating boilers, plants for the chemical industry and so on. The ally may contain a specific amount or amounts of one or more elements selected from Co, B, Ta, Hf, Nb, Zr, Ca, Mg, Y, La, Ce and Nd.

摘要翻译： 一种奥氏体系耐热合金，以质量％计含有0.15％，Si＆NlE; 2％，Mn＆NlE; 3％，Ni：40〜80％，Cr：15〜40％，W：1〜15％ 在总含量中，Ti＆NlE; 3％，Al＆NlE; 3％，N＆amp; NlE; 0.03％，O＆NlE; 0.03％，余量为Fe和杂质，杂质P＆lt; L; 0.04％，S＆NlE; 0.03％，Sn＆ ，As / nlE; 0.01％，Zn和nlE; 0.01％，Pb和nlE; 0.01％和Sb＆nlE; 0.01％，满足条件[P1 = S + {（P + Sn）/ 2} + {（As + Zn + Pb + Sb）/ 5}＆nlE; 0.050]，[0.2＆nlE; P2 = Ti + 2Al＆nlE; 7.5-10×P1]，[P2＆nlE; 9.0-100×O]和[N＆lt; lE; 0.002×P2 + 0.019]可以防止液化裂纹 HAZ和HAZ中的脆性裂纹，并且还可以防止在焊接制造期间发生的焊接可制造性的缺陷，并且还在高温下具有优异的蠕变强度。 因此，该合金可以适当地用作构成发电锅炉，化工工业用等的高温机器和设备的材料。 盟友可以含有一定量或数量的选自Co，B，Ta，Hf，Nb，Zr，Ca，Mg，Y，La，Ce和Nd中的一种或多种元素。

公开(公告)号：US20080050265A1

公开(公告)日：2008-02-28

申请号：US11907575

申请日：2007-10-15

申请人： Masaaki Igarashi ,  Kaori Kawano

发明人： Masaaki Igarashi ,  Kaori Kawano

IPC分类号： C22C38/32

CPC分类号： C22C38/22 ,  C22C38/02 ,  C22C38/04 ,  C22C38/24

摘要： A low alloy steel for a heat-resisting structural member being improved in long time creep ductility at high temperatures and temper softening resistance, characterized by comprising, by mass percent, C: 0.03 to 0.10%, Si: not more than 0.30%, Mn: not more than 1.0%, Cr: more than 1.5% to not more than 2.5%, Mo: 0.01 to 1.0%, V: 0.04 to 0.30%, Nb: 0.001 to 0.10%, Ti: 0.001 to 0.020%, B: 0.0001 to 0.020%, Al: 0.001 to 0.01% and Nd: 0.0001 to 0.050%, with the balance being Fe and impurities, wherein the content of P is not more than 0.020%, the content of S is not more than 0.003%, the content of N is less than 0.0050% and the content of O (oxygen) is not more than 0.0050% among the impurities, in which the value of BSO represented by the following formula (1) is 0.0001 to 0.010: BSO=B−(11/14)N−(11/32)S−(11/16)O  (1), wherein each element symbol in the formula (1) represents the content (by mass %) of the element concerned. The steel may further contain one or more element selected from among W, Cu, Ni, Co, Mg, Ca, La, Ce, Y, Sm and Pr.

摘要翻译： 用于耐热结构件的低合金钢在高温下的长时间蠕变延展性和回火软化性得到改善，其特征在于以质量％计含有C：0.03至0.10％，Si：不大于0.30％，Mn ：不大于1.0％，Cr：大于1.5％至不大于2.5％，Mo：0.01至1.0％，V：0.04至0.30％，Nb：0.001至0.10％，Ti：0.001至0.020％，B： 0.0001〜0.020％，Al：0.001〜0.01％，Nd：0.0001〜0.050％，余量为Fe和杂质，其中P含量不大于0.020％，S含量不大于0.003％ 在下述式（1）表示的BSO值为0.0001〜0.010的<！ - SIPO - >杂质中，N的含量小于0.0050％，O（氧）的含量为0.0050％以下。 line-formula description =“In-line Formulas”end =“lead”？> BSO = B-（11/14）N-（11/32）S-（11/16）O（1），< line-formula description =“In-line Formulas”end =“tail”？>其中式（1）中的每个元素符号 代表有关要素的内容（质量百分比）。 钢可以进一步含有选自W，Cu，Ni，Co，Mg，Ca，La，Ce，Y，Sm和Pr中的一种或多种元素。

公开(公告)号：US06379611B1

公开(公告)日：2002-04-30

申请号：US09641683

申请日：2000-08-18

申请人： Nobuyoshi Komai ,  Fujimitsu Masuyama ,  Tomomitsu Yokoyama ,  Hiroyuki Hirata ,  Kaori Kawano ,  Takao Kan

发明人： Nobuyoshi Komai ,  Fujimitsu Masuyama ,  Tomomitsu Yokoyama ,  Hiroyuki Hirata ,  Kaori Kawano ,  Takao Kan

IPC分类号： C22C3822

CPC分类号： B23K35/308 ,  B23K35/3093 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28

摘要： A high strength, low alloy, heat resistant steel having excellent weldability has an average crystal grain diameter of at most 110 &mgr;m and consists essentially of, by mass %: C: 0.03-0.15%, Si: at most 1%, Mn: at most 2%, P: at most 0.03%, S: at most 0.03%, Ni: at most 0.5%, Cu: at most 0.5%, Cr: 1.8-2.8%, V: 0.1-0.3%, Nb: 0.01-0.08%, Mo: 0.05-0.35%, W: 1.2-1.8%, Ti: 0.001-0.05%, B: 0-0.02%, Al: at most 0.1%, O: at most 0.1%, N: in an amount satisfying the formula [%N]≦[%Ti]+5[%B]+0.004, and a remainder of unavoidable impurities.

摘要翻译： 焊接性优异的高强度，低合金，耐热钢的平均结晶粒径为110μm以下，质量％以C：0.03〜0.15％，Si：1％以下，Mn：at 最多2％，P：0.03％以下，S：0.03％以下，Ni：0.5％以下，Cu：0.5％以下，Cr：1.8〜2.8％，V：0.1-0.3％，Nb： 0.08％，Mo：0.05-0.35％，W：1.2-1.8％，Ti：0.001-0.05％，B：0-0.02％，Al：至多0.1％，O：0.1％以下，N： 满足公式[％N] <= [％Ti] +5 [％B] +0.004，剩余的不可避免的杂质。