公开(公告)号：US06331216B1

公开(公告)日：2001-12-18

申请号：US09214226

申请日：1998-12-30

Applicant: Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

Inventor： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

IPC: C21D713

CPC classification number: C21D8/10 ,  C21D2201/00 ,  C21D2211/005

Abstract: The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe.

Abstract translation: 钢管具有主要由铁素体或铁素体加珠光体或铁素体和渗碳体组成的结构。 钢管的特征在于，其粒径不大于3μm，优选不大于1μm，伸长率大于20％，拉伸强度（TS：MPa）和伸长率（E1：％）大于10000， 延性断裂大于95％，优选100％，通过夏比冲击试验在-100℃的实际管上测量。该结构的特征在于C：0.005-0.03％，Si：0.01-3.0％，Mn：0.01-2.0 ％，Al：0.001-0.10％，由铁素体或铁素体和二次相组成，铁素体晶粒不大于3μm，第二相的面积比不大于30％。 将具有上述组成的钢管坯料在（Ac1 + 50℃）的温度下加热至400℃，随后在（Ac1 + 50℃）的轧制温度下降低至400℃。 使得直径的累积减小大于20％。 优选地进行还原，使得至少一个轧制通道将直径每次通过减少6％以上。 如果C，Si，Mn和其他合金元素的含量低，并且在上述规定的温度下进行还原，则钢管将具有高延展性和高强度，并且在韧性和耐应力腐蚀开裂性方面优异。 所得钢管具有良好的抗疲劳性能，适用于管线管。

公开(公告)号：US20010027831A1

公开(公告)日：2001-10-11

申请号：US09771589

申请日：2001-01-30

Applicant: Kawasaki Steel Corporation

Inventor： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Taro Kanayama ,  Masahiko Morita ,  Saiji Matsuoka ,  Nobuki Tanaka ,  Osamu Furukimi ,  Takaaki Hira

IPC: C22C038/44

CPC classification number: C21D8/10 ,  C21D2201/00

Abstract: A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (nullm), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of nullm (null C.) and a total reduction ratio Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, nullm and Tred being in a relation satisfying a prescribed equation.

Abstract translation: 提供了具有优异的韧性和延展性以及良好的延展性 - 强度平衡以及优异的抗冲击冲击性的细铁素体晶粒的钢管及其制造方法。 含有超细晶粒的钢管可以通过加热具有平均晶体直径为二（母）的铁素体晶粒的基础钢管，其中C，Si，Mn和Al被限制在适当的范围内，如果需要 进一步添加Cu，Ni，Cr和Mo，或Nb，Ti，V，B等，不高于Ac 3相变点，并以平均轧制温度（℃）和 总减速比Tred（％）在400〜Ac3相变点的s温度范围内，di，thetam和Tred处于满足规定方程的关系。

公开(公告)号：EP3242794A4

公开(公告)日：2018-08-01

申请号：EP16735527

申请日：2016-01-09

Applicant: HARVARD COLLEGE ,  BOOTH MORRISON CHRISTOPHER ,  CARSON CARL J ,  FARHANGI MEHRAN ,  GERENDAS MIKLOS ,  GILLESPIE THOMAS HAROLD ,  INNES MATTHEW CHRISTOPHER ,  JETTE FRANCOIS XAVIER ,  PHAM MINH QUAN ,  GUERRERO FABIAN ENRIQUE SANCHEZ ,  SCARINCI THOMAS ,  SCHAENZER MEGAN ,  SHANIAN ALI ,  SMITH ROBERGE EVELYNE ,  VILLIEN BENOIT

Inventor： JAVID FARHAD ,  BERTOLDI KATIA ,  TAYLOR MICHAEL JAMES ,  BOOTH-MORRISON CHRISTOPHER ,  CARSON CARL J ,  FARHANGI MEHRAN ,  GERENDAS MIKLOS ,  GILLESPIE THOMAS HAROLD ,  INNES MATTHEW CHRISTOPHER ,  JETTE FRANÇOIS-XAVIER ,  PHAM MINH QUAN ,  GUERRERO FABIAN ENRIQUE SANCHEZ ,  SCARINCI THOMAS ,  SCHAENZER MEGAN ,  SHANIAN ALI ,  SMITH-ROBERGE EVELYNE ,  VILLIEN BENOIT

IPC: B32B3/26

CPC classification number: B44F99/00 ,  B32B3/26 ,  C21D2201/00 ,  C21D2201/03 ,  C21D2211/00 ,  C22C19/03 ,  C22C19/05 ,  C22C19/07 ,  F23R3/002

Abstract: The present concepts include a zero-porosity structure having a plurality of structural elements arranged to provide a negative Poisson's ratio and, further, a new mechanism to generate negative Poisson's ratio is single material, zero-porosity structure.

公开(公告)号：EP3147911A1

公开(公告)日：2017-03-29

申请号：EP15796101.2

申请日：2015-05-12

Applicant: IHI Corporation

Inventor： YAN, Xinglong ,  OTANI, Akihito ,  TAKAHASHI, Satoshi ,  IMAI, Yoshiyuki ,  SATO, Hiroyuki

IPC: G21D1/00 ,  G21C15/24

CPC classification number: G21C15/247 ,  C21D2201/00 ,  C22C19/03 ,  F04D7/08 ,  F04D29/026 ,  F05D2300/17 ,  F05D2300/176 ,  G21C15/24 ,  G21C17/0225 ,  G21C21/00 ,  G21D1/02 ,  Y02E30/40

Abstract: The present invention includes a casing 11 and a rotary mechanism provided with an impeller 12 and an output shaft 13a that come into contact with primary cooling helium containing radioactive nuclides passing through the casing 11. The impeller 12 and the output shaft 13a of the rotary mechanism are composed of a coarsely-grained crystalline material containing a monocrystalline material with a larger grain size to have a lower effective diffusion coefficient than a polycrystalline alloy. This can prevent radioactive nuclides from deeply diffusing into a material constituting a rotor or a rotor shaft that come into contact with coolant containing radioactive nuclides, thereby reducing the cost of maintenance.

Abstract translation: 本发明包括壳体11和旋转机构，其具有与通过壳体11的含有放射性核素的一次冷却氦接触的叶轮12和输出轴13a。旋转机构的叶轮12和输出轴13a 由具有较大晶粒尺寸的单晶材料的粗晶粒结晶材料组成，具有比多晶合金更低的有效扩散系数。 这可以防止放射性核素深深地扩散到构成与包含放射性核素的冷却剂接触的转子或转子轴的材料，从而降低维护成本。

公开(公告)号：EP1669470B1

公开(公告)日：2013-07-24

申请号：EP04772902.5

申请日：2004-09-02

Applicant: Nippon Steel & Sumitomo Metal Corporation

Inventor： YOKOI, Tatsuo, c/o Nippon Steel & Sumitomo Metal Corporation ,  YAMADA, Tetsuya, c/o Nippon Steel & Sumitomo Metal Corporation ,  KAWANO, Osamu, c/o Nippon Steel & Sumitomo Metal Corporation

IPC: C22C38/06 ,  C23C2/02 ,  C23C2/28 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04

CPC classification number: C23C2/02 ,  C21D8/0226 ,  C21D2201/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  Y10T428/12799

公开(公告)号：EP2530181A1

公开(公告)日：2012-12-05

申请号：EP12170314.4

申请日：2012-05-31

Applicant: General Electric Company

Inventor： WESSMAN, Andrew Ezekiel ,  MOURER, David Paul ,  WEI, Daniel Yeuching

IPC: C22F1/10 ,  B23P15/00 ,  C21D8/02

CPC classification number: B23P15/006 ,  B21K1/32 ,  C21D1/26 ,  C21D7/13 ,  C21D9/32 ,  C21D2201/00 ,  C22C19/03 ,  F01D5/02 ,  F05D2230/25

Abstract: Processes for fabricating components (10) to have two or more regions (14, 12) with different grain structures, and components (10) produced by such processes. The processes entail performing at least one forging step on a preform (20) to produce a profile (24) having at least a first portion (28) corresponding to the first region (14) of the component (10). The preform (20) is formed of a precipitation-strengthened alloy having a solvus temperature, and the at least one forging step comprises a nonfinal forging step performed at a first strain rate and at a first subsolvus temperature that is below the solvus temperature of the alloy. A subsequent forging step is performed on the profile (24) to produce a final profile (26) comprising the first portion (28) and a second portion (32) corresponding to the second region (12) of the component (10). The subsequent forging step is performed at a strain rate and at a subsequent subsolvus temperature, wherein at least one of the subsequent strain rate and subsequent subsolvus temperature is either higher or lower than the first strain rate or first subsolvus temperature. A heat treatment is then performed on the final profile (26) to cause grain growth, wherein the first portion (28) of the final profile (26) has a different grain size than the second portion (32).

Abstract translation: 用于制造组分（10）的过程以具有两个或多个区域（14，12）具有不同的晶粒结构，并且通过搜索过程产生部件（10）。 的处理意味着在执行上的预制件（20）的至少一个锻造工序，以产生对应于所述部件（10）的第一区域（14）的轮廓（24）具有至少一个第一部分（28）。 速率和预成型体（20）被形成具有溶线温度的析出强化合金制成，并且所述至少一个锻造步骤包括在第一应变在第一固溶线温度下进行一个非最终锻造工序所做的是下面的固溶线温度 合金。 甲后续锻造步骤中进行的简档（24），以产生最终的轮廓（26）包括第一部分（28）和对应于所述部件（10）的第二区域（12）的第二部分（32）。 随后的锻造工序在应变速率和在一定温度下的后续固溶线进行，worin后续应变速率中的至少一个和温度是固溶线随后高于或低于第一应变率或第一固溶线温度以下。 的热处理，然后在最终轮廓（26）中进行以引起晶粒生长，worin最终轮廓（26）的所述第一部分（28）具有不同的晶粒尺寸比所述第二部分（32）。

公开(公告)号：EP1257680B1

公开(公告)日：2006-09-13

申请号：EP01906588.7

申请日：2001-01-19

Applicant: Lin, Hui

Inventor： Lin, Hui

IPC: C22C38/06

CPC classification number: C22C27/06 ,  C21D6/02 ,  C21D2201/00 ,  C21D2211/004 ,  C22C38/06 ,  C22C38/18 ,  F01D5/28

Abstract: The present invention is directed to an iron, aluminum, chromium, carbon alloy and a method of producing the same, wherein the alloy has good room temperature ductility, excellent high temperature oxidation resistance and ductility. The alloy includes about 10 to 70 at.% iron, about 10 to 45 at.% aluminum, about 1 to 70 at.% chromium and about 0.9 to 15 at.% carbon. The invention is also directed to a material comprising a body-centered-cubic solid solution of this alloy, and a method for strengthening this material by the precipitation of body-centered-cubic particles within the solid solution, wherein the particles have substantially the same lattice parameters as the underlying solid solution. The ease of processing and excellent mechanical properties exhibited by the alloy, especially at high temperatures, allows it to be used in high temperature structural applications, such as a turbocharger component.

公开(公告)号：EP1669470A1

公开(公告)日：2006-06-14

申请号：EP04772902.5

申请日：2004-09-02

Applicant: NIPPON STEEL CORPORATION

Inventor： YOKOI, Tatsuo, c/o Nippon Steel Corporation ,  YAMADA, Tetsuya, c/o Nippon Steel Corporation ,  KAWANO, Osamu, c/o Nippon Steel Corporation

IPC: C22C38/00 ,  C22C38/06 ,  C22C38/58 ,  C21D9/46 ,  C21D8/02

CPC classification number: C23C2/02 ,  C21D8/0226 ,  C21D2201/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  Y10T428/12799

Abstract: This hot rolled steel sheet includes: in terms of percent by mass, C of 0.01 to 0.2%; Si of 0.01 to 2%; Mn of 0.1 to 2%; P of ≤0.1%; S of ≤0.03%; Al of 0.001 to 0.1%; N of ≤0.01%; and as a remainder, Fe and unavoidable impurities, wherein a microstructure is substantially a homogeneous continuous-cooled microstructure, and an average grain size of the microstructure is more than 8 µm and 30µm or less. This method for manufacturing a hot rolled steel sheet includes: a step of subjecting a slab having the above composition to a rough rolling so as to obtain a rough rolled bar; a step of subjecting the rough rolled bar to a finish rolling so as to obtain a rolled steel under conditions in which a finishing temperature is (Ar 3 transformation point + 50°C) or more; and a step of starting cooling the rolled steel after 0.5 seconds or more pass from the end of the finish rolling at a temperature of the Ar 3 transformation point or more, cooling at least in the temperature range from the Ar 3 transformation point to 500°C at a cooling rate of 80°C/sec or more, further cooling until the temperature is 500°C or less to obtain a hot rolled steel sheet and coiling the hot rolled steel sheet.

Abstract translation: 该热轧钢板包括：以质量％计，为0.01〜0.2％的C; Si为0.01〜2％ Mn为0.1〜2％ P‰‰0.1％; S‰‰.03％; Al为0.001〜0.1％; N‰‰0.01％; 作为余量，Fe和不可避免的杂质，其中微观结构基本上是均匀的连续冷却微结构，并且微结构的平均晶粒尺寸大于8μm和30μm或更小。 该热轧钢板的制造方法包括：对具有上述组成的板坯进行粗轧以获得粗轧条的工序; 在粗轧温度为（Ar 3相变点+ 50℃）以上的条件下，对粗轧条进行精轧以获得轧制钢的工序; 以及在Ar 3相变点以上的温度下从精轧结束0.5秒钟以上开始冷却轧制钢的工序，至少在Ar 3相变点的温度范围内至少冷却500℃ 以80℃/秒以上的冷却速度进行冷却，进一步冷却至500℃以下，得到热轧钢板并卷取热轧钢板。

公开(公告)号：EP1339880A1

公开(公告)日：2003-09-03

申请号：EP01996631.6

申请日：2001-11-16

Applicant: IMPHY UGINE PRECISION

Inventor： COUTU, Lucien

IPC: C21D8/02 ,  C22C38/10

CPC classification number: C21D8/0205 ,  C21D6/02 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2201/00 ,  C22C38/004 ,  C22C38/105 ,  C22C38/12

Abstract: The invention concerns a method for making a strip or a workpiece cut out from a cold rolled maraging steel strip and hardened by a hardening heat treatment, which consists, prior to the heat treatment, in subjecting the strip or the workpiece to cold plastic deformation with a rate of strain hardening more than 30 % and in subjecting the strip or the workpiece to a recrystallization annealing so as to obtain a fine grain of ASTM index more than 8. The maraging steel composition comprises, by weight: 12 % ≤ Ni ≤ 24.5 %; 2.5 % ≤ Mo ≤ 12 %; 4.17 % ≤ Co ≤ 20 %; Al ≤ 0.15 %; Ti ≤ 0.1 %; N ≤ 0.003 %; Si ≤ 0.1 %; Mn ≤ 0.1 %; C ≤ 0.005 %; S ≤ 0.001 %; P ≤ 0.005 %; H ≤ = 0.0003 %; O ≤ 0.001 %; the rest being iron and impurities resulting from preparation of the composition, the composition further satisfying the following relationships: 20 % ≤ Ni + Mo ≤ 27 %; 50 ≤ Co x Mo ≤ 200

公开(公告)号：EP1031632A3

公开(公告)日：2002-07-31

申请号：EP00301483.4

申请日：2000-02-24

Applicant: Japan as represented by Director General of National Research Institute for Metals

Inventor： Torizuka, Shiro ,  Umezawa, Osamu ,  Tsuzaki, Kaneaki ,  Nagai, Kotobu

IPC: C21D8/00 ,  C21D7/13

CPC classification number: C21D8/00 ,  C21D7/13 ,  C21D2201/00 ,  C21D2211/005

Abstract: A method of producing a ultra fine grain steel made of ferrite having a mean grain size of not larger that 3 µm as the base phase, after ingoting raw materials, by austenitizing the ingot by heating it to a temperature of at least an Ac 3 point, then, applying compression working of a reduction ratio of at least 50% at a temperature of from an Ae 3 point or lower to an Ar 3 point - 150°C, or at a temperature of at least 550°C, and thereafter, cooling, wherein the strain rate as compression working is in the range of from 0.001 to 10/second.

Abstract translation: 制造平均粒径不大于3μm的铁素体作为基础的超细晶粒钢的制造方法，在将原料进料后，通过将锭加热至至少Ac 3的温度来奥氏体化 点，然后在Ae 3点以下至Ar 3点-150℃的温度下或在至少550℃的温度下进行至少50％的还原率的压缩加工，此后 ，冷却，其中作为压缩加工的应变速率在0.001至10 /秒的范围内。