Seamless steel pipe manufacturing method and equipment
    1.
    发明授权
    Seamless steel pipe manufacturing method and equipment 失效
    无缝钢管制造方法和设备

    公开(公告)号:US6024808A

    公开(公告)日:2000-02-15

    申请号:US973903

    申请日:1998-04-01

    摘要: A method of manufacturing a seamless steel pipe having excellent properties with high productivity in on-line processing, and an apparatus in which includes casting and heat treatment unit on-line. In the method the following steps (1) to (6) are successively performed. (1) A round billet is produced by continuous casting machine 1. (2) The billet is cooled to a temperature not higher than a Ar.sub.1 point, then heated and soaked in a furnace 3. (3) The billet is pierced by a piercer 5 at a strain rate of not higher than 200/sec and made into a hollow shell. (4) The hollow shell is elongated and finish rolled to make into a seamless steel pipe at an average strain rate of not lower than 0.01/sec and with a reduction ratio of not lower than 40%, and finishing the rolling at a temperature from 800.degree. C. to 1050.degree. C. (5) The seamless steel pipe is cooled to a temperature not higher than the Ar.sub.3 point at a cooling rate of not lower than 80.degree. C./min. (6) The cooled pipe is reheated to a temperature 850-1000.degree. C., held for 10 sec. to 30 min., then quenched and tempered.

    摘要翻译: PCT No.PCT / JP97 / 01370 Sec。 371日期:1998年4月1日 102(e)1998年4月1日PCT PCT 1997年4月18日PCT公布。 第WO97 / 39843号公报 日期1997年10月30日在线处理中具有优异性能,生产率高的无缝钢管的制造方法,以及在线设置铸造和热处理单元的装置。 在该方法中,依次执行以下步骤(1)至(6)。 (1)通过连续铸造机1制造圆钢坯。(2)将坯料冷却至不高于Ar1点的温度,然后在炉3中加热浸泡。(3)坯料被穿孔机 5,应变速度不高于200 /秒,制成中空壳。 (4)中空壳体细长并精轧成平均应变速度不低于0.01 /秒,压缩比不低于40%的无缝钢管,并在 800℃〜1050℃(5)无缝钢管以不低于80℃/ min的冷却速度冷却至不高于Ar 3点的温度。 (6)将冷却管再加热至温度850-​​1000℃,保持10秒。 至30分钟,然后淬火和回火。

    Method and facility for manufacturing seamless steel pipe
    2.
    发明授权
    Method and facility for manufacturing seamless steel pipe 失效
    无缝钢管制造方法及设备

    公开(公告)号:US5873960A

    公开(公告)日:1999-02-23

    申请号:US809641

    申请日:1997-03-26

    CPC分类号: B21B23/00 C21D8/10 B21B1/466

    摘要: The manufacturing method of the present invention comprises steps (1) through (8) which are sequentially arranged, and the steps or equipment from the production of billets to end products are connected in the same single continuous manufacturing line:(1) a step of producing a round billet by continuous casting,(2) a step of cooling the billet to a temperature not higher than an A.sub.r1 transformation temperature,(3) a step of heating the billet to a temperature which allows piercing of the billet,(4) a step of piercing, at a strain rate of not higher than 200/sec, the billet to obtain a hollow shell,(5) a step to form a steel pipe by elongating and finish rolling the hollow shell using a continuous elongating mill and a finish rolling mill which are directly connected to each other, at a predetermined average strain rate, a predetermined reduction ratio, and at a predetermined finishing temperature,(6) a step of recrystallizing the steel pipe at a temperature of not lower than an Ar.sub.r3 transformation temperature,(7) a step of quenching the steel pipe from a temperature not lower than an A.sub.r3 transformation temperature, and(8) a step of tempering the steel pipe.

    摘要翻译: 本发明的制造方法包括依次布置的步骤(1)至(8),并且从生产坯料到终端产品的步骤或设备连接在相同的单个连续生产线中:(1)步骤 (2)将坯料冷却至不高于Ar1相变温度的步骤,(3)将坯料加热至允许穿孔的温度的步骤,(4) 以不高于200 /秒的应变速率穿过坯料以获得中空壳的步骤,(5)通过使用连续延伸研磨机对中空壳进行伸长和精轧而形成钢管的步骤,以及 以预定的平均应变率,规定的压下率,规定的终轧温度直接连接的精轧机(6)在不低于Ar的温度下对钢管进行再结晶的工序 r3转变温度,(7)从不低于Ar3相变温度的温度淬火钢管的工序,(8)回火钢管的工序。

    Method of producing tool steels
    3.
    发明授权
    Method of producing tool steels 有权
    生产工具钢的方法

    公开(公告)号:US06478898B1

    公开(公告)日:2002-11-12

    申请号:US09664766

    申请日:2000-09-19

    IPC分类号: C21D1100

    摘要: A method of producing a tool steel comprises quenching a steel containing, by mass percent, C: 0.25 to 0.60%, Si: 0.10 to 1.20%, Mn: 0.20 to 1.50%, Ni: 0.50 to 2.00%, Cr: 1.00 to 4.20%, Mo: 0.30 to 2.00%, V: 0.10 to 1.00% and Al: 0.005 to 0.10%, in order to obtain a hardness H such that the hardness index defined below by the formula (1) becomes between 0.20 to 0.95; and then tempering the steel; K=(H−H2)/(H1−H2)  (1) Where H1: Vickers hardness of the steel with 10 mm thickness after heating to a temperature of the Ac3 transformation point plus 50° C., and quenching into water; H2: Vickers hardness of the steel with 10 mm thickness after heating to the same temperature as defined above, and cooling to room temperature over 20 hours.

    摘要翻译: 制造工具钢的方法包括以质量%计含有C:0.25〜0.60%,Si:0.10〜1.20%,Mn:0.20〜1.50%,Ni:0.50〜2.00%,Cr:1.00〜4.20 %,Mo:0.30〜2.00%,V:0.10〜1.00%,Al:0.005〜0.10%,以获得如下式(1)所示的硬度指数为0.20〜0.95的硬度H; 然后回火钢;其中H1:加热后的厚度为10mm的钢的维氏硬度到Ac3相变点的温度加上50℃,淬火成水; H2:厚度为10mm的钢的维氏硬度 加热到与上述相同的温度,并在20小时内冷却至室温。

    High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance
    5.
    发明授权
    High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance 有权
    高强度不锈钢管具有优异的耐硫化应力开裂性和高温碳酸气体耐腐蚀性能

    公开(公告)号:US08608872B2

    公开(公告)日:2013-12-17

    申请号:US13082432

    申请日:2011-04-08

    IPC分类号: C22C38/42 C22C38/44

    摘要: The problem to be solved is the provision of a high-strength stainless steel pipe having a sufficient corrosion resistance in a high-temperature carbonic acid gas environment and having an excellent sulfide stress cracking resistance at normal temperature. A high-strength stainless steel pipe consist of, by mass %, C: 0.05% or less, Si: 1.0% or less, P: 0.05% or less, S: less than 0.002%, Cr: more than 16% and 18% or less, Mo: more than 2% and 3% or less, Cu: 1% to 3.5%, Ni: 3% or more and less than 5%, Al: 0.001% to 0.1% and O: 0.01% or less, Mn: 1% or less and N: 0.05% or less, and Mn and N in the above ranges satisfy formula (1), and the balance being Fe and impurities; and the metal micro-structure of the stainless steel pipe mainly includes a martensitic phase and comprises 10 to 40% of a ferritic phase by volume fraction and 10% or less of a retained γ-phase by volume fraction. [Mn]×([N]−0.0045)≦0.001  (1) wherein the symbols of elements in formula (1) respectively represent the contents (unit: mass %) of the elements in the steel.

    摘要翻译: 要解决的问题是在高温碳酸气体环境中提供具有足够耐腐蚀性的高强度不锈钢管,并且在常温下具有优异的耐硫化物应力开裂性。 高强度不锈钢管以质量%计含有C:0.05%以下,Si:1.0%以下,P:0.05%以下,S:小于0.002%,Cr:16%以上18以下 %以下,Mo:大于2%,3%以下,Cu:1〜3.5%,Ni:3%以上且小于5%,Al:0.001〜0.1%,O:0.01%以下 ,Mn:1%以下,N:0.05%以下,上述范围的Mn和N满足式(1),余量为Fe和杂质; 并且不锈钢管的金属微结构主要包括马氏体相,并且包含10〜40体积%的铁素体相和10体积%以下的γ相。 [Mn]×([N] -0.0045)@ 0.001(1)其中,式(1)中的元素的符号分别表示钢中元素的含量(单位:质量%)。

    ELECTROLUMINESCENT ELEMENT, METHOD FOR MANUFACTURING ELECTROLUMINESCENT ELEMENT, DISPLAY DEVICE AND ILLUMINATING DEVICE
    7.
    发明申请
    ELECTROLUMINESCENT ELEMENT, METHOD FOR MANUFACTURING ELECTROLUMINESCENT ELEMENT, DISPLAY DEVICE AND ILLUMINATING DEVICE 审中-公开
    电致发光元件,制造电致发光元件的方法,显示装置和照明装置

    公开(公告)号:US20120299469A1

    公开(公告)日:2012-11-29

    申请号:US13519599

    申请日:2010-12-21

    IPC分类号: H05B33/12 H05B33/10

    摘要: Disclosed is an electroluminescent element (10) which includes an anode layer (12), a cathode layer (14), a first low refractive index layer (13) that is formed between the anode layer (12) and the cathode layer (14), a recessed portion (16) that penetrates at least the anode layer (12) and the first low refractive index layer (13), a second low refractive index layer (19) that is formed on the bottom of the recessed portion (16), and a light emitting portion (17) that is formed on the second low refractive index layer (19). The electroluminescent element (10) is also characterized in that the refractive index of the first low refractive index layer (13) and the refractive index of the second low refractive index layer (19) are lower than the refractive index of the light emitting portion (17). The electroluminescent element (10) provides an electroluminescent element which has high light-emitting efficiency when the light emitted from the light emitting portion is taken out from the substrate side.

    摘要翻译: 公开了一种电致发光元件(10),其包括形成在阳极层(12)和阴极层(14)之间的阳极层(12),阴极层(14),第一低折射率层(13) ,至少穿透所述阳极层(12)和所述第一低折射率层(13)的凹部(16),形成在所述凹部(16)的底部上的第二低折射率层(19) 和形成在第二低折射率层(19)上的发光部分(17)。 电致发光元件(10)的特征还在于,第一低折射率层(13)的折射率和第二低折射率层(19)的折射率低于发光部分(的折射率) 17)。 电致发光元件(10)提供当从基板侧取出从发光部分发出的光时具有高发光效率的电致发光元件。

    Induction hardened hollow driving shaft
    9.
    发明授权
    Induction hardened hollow driving shaft 有权
    感应淬火空心驱动轴

    公开(公告)号:US08070890B2

    公开(公告)日:2011-12-06

    申请号:US12346569

    申请日:2008-12-30

    IPC分类号: C22C38/32 C22C38/28

    摘要: The present invention provides an induction-hardened hollow driving shaft that comprises, as a raw material, a steel pipe that contains, by mass %, 0.30 to 0.47% C, 0.5% or less Si, 0.3 to 2.0% Mn, 0.018% or less P, 0.015% or less S, 0.15 to 1.0% Cr, 0.001 to 0.05% Al, 0.005 to 0.05% Ti, 0.004% or less Ca, 0.01% or less N, 0.0005 to 0.005% B and 0.0050% or less O (oxygen) and the balance Fe and impurities and of which Beff defined by an equation (a) or (b) below is 0.0001 or more, wherein a prior austenite grain size number (JIS G0551) after the hardening is 9 or more. Here, in the case of Neff=N−14×Ti/47.9≧0, Beff=B−10.8×(N−14×Ti/47.9)/14 . . . (a), and, in other cases, Beff=B . . . (b). According to the present invention, a hollow driving shaft that is simultaneously provided with excellent cold workability, hardenability, toughness and torsional fatigue strength and can exert stable fatigue lifetime can be obtained and can be widely utilized.

    摘要翻译: 本发明提供一种感应淬火的中空驱动轴,其包括以质量%计含有0.30〜0.47%C,0.5%以下的Si,0.3〜2.0%Mn,0.018%或以下的钢管作为原料 较小的P,0.015%以下的S,0.15〜1.0%的Cr,0.001〜0.05%的Al,0.005〜0.05%的Ti,0.004%以下的Ca,0.01%以下的N,0.0005〜0.005%的B和0.0050%以下的O (氧),余量为Fe和杂质,其中由下式(a)或(b)定义的Beff为0.0001以上,硬化后的原奥氏体晶粒数(JIS G0551)为9以上。 这里,在Neff = N-14×Ti /47.9≥0的情况下,Beff = B-10.8×(N-14×Ti / 47.9)/ 14。 。 。 (a),而在其他情况下,Beff = B。 。 。 (b)。 根据本发明,可以获得同时具有优异的冷加工性,淬透性,韧性和扭转疲劳强度并且可以发挥稳定的疲劳寿命的中空驱动轴,并且可以被广泛使用。

    Seamless steel pipe for line pipe and a process for its manufacture
    10.
    发明授权
    Seamless steel pipe for line pipe and a process for its manufacture 有权
    管道无缝钢管及其制造工艺

    公开(公告)号:US07896985B2

    公开(公告)日:2011-03-01

    申请号:US12071493

    申请日:2008-02-21

    IPC分类号: C21D9/08 C22C38/44

    摘要: A seamless steel pipe for line pipe having a high strength and good toughness and corrosion resistance even though having a thick wall has a chemical composition comprising, in mass percent, C: 0.02-0.08%, Si: at most 0.5%, Mn: 1.5-3.0%, Al: 0.001-0.10%, Mo: greater than 0.4% to 1.2%, N: 0.002-0.015%, Ca: 0.0002-0.007%, and a remainder of Fe and impurities, wherein the contents of the impurities are at most 0.03% for P, at most 0.005% for S, at most 0.005% for O and less than 0.0005% for B and wherein the value of Pcm calculated by the following Equation (1) is at least 0.185 and at most 0.250. The steel pipe has a microstructure which primarily comprises bainite and which has a length of cementite of at most 20 micrometers: Pcm=[C]+[Si]/30+([Mn]+[Cr]+[Cu])/20+[Mo]/15+[V]/10+5[B]  (1) wherein [C], [Si], [Mn], [Cr], [Cu], [Mo], [V] and [B] are numbers respectively indicating the content in mass percent of C, Si, Mn, Cr, Cu, Mo, V and B.

    摘要翻译: 即使具有厚壁,也具有高强度,良好的韧性和耐腐蚀性的线管用无缝钢管,其化学成分的质量百分比含有C:0.02〜0.08%,Si:0.5%以下,Mn:1.5 -3.0%,Al:0.001-0.10%,Mo:大于0.4%-1.2%,N:0.002-0.015%,Ca:0.0002-0.007%,余量为Fe和杂质,杂质含量为 P最多为0.03%,S为0.005%以下,O为0.005%以下,B为0.0005%以下,其中,通过下述式(1)计算出的Pcm值为0.185以上且0.250以下。 钢管具有主要包括贝氏体并且具有至多20微米的渗碳体长度的微结构:Pcm = [C] + [Si] / 30 +([Mn] + [Cr] + [Cu])/ 20 + [Mo] / 15 + [V] / 10 + 5 [B](1)其中〔C〕,〔Si〕,〔Mn〕,〔Cr〕,〔Cu〕,〔Mo〕,〔V〕, B]是分别表示C,Si,Mn,Cr,Cu,Mo,V和B的质量含量的数字。