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extra-low
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  超低
     Research and Production on Extra-Low Carbon StainlessSteel 00Cr25Ni22Mo2N
     00Cr25Ni22Mo2N超低碳不锈钢的试制
短句来源
     Structure and Anti-Corrosion Behavior of Extra-Low Carbon 26Cr-28Ni-5Mo-3Cu-0. 35Nb Cast Stainless Steel
     超低碳Cr26-Ni28-Mo5-Cu3-Nb0.35铸造不锈钢的组织和耐蚀性能
短句来源
     VOD Refimimg For 04Ni3Mn2MoTi Extra-Low Carbon Welding Rod Steel
     04Ni3Mn2MoTi超低碳焊条钢的VOD冶炼
     A Study on Reducing Dephosphorization of Extra-Low Carbon Austenite Stainless Steel 00Cr18Ni10
     超低碳奥氏体不锈钢00Cr18Ni10还原脱磷研究
短句来源
     Two kinds of extra-low carbon welding rod steel - 0.01C-1.55Mn-0.08Si-2.50Ni-0.29Mo-0.12Ti and 0.01C-1.50Mn-0.49Si-2.43Ni-0.24Mo-0.11Ti were produced by 20 t arc furnace-LF-VOD process.
     采用 2 0t电弧炉 LF VOD精炼工艺试制的两种超低碳焊条用钢成分分别为 (% ) :0 .0 1C 1.5 5Mn 0 .0 8Si 2 .5 0Ni 0 .2 9Mo 0 .12Ti和 0 .0 1C 1.5 0Mn 0 .4 9Si 2 .4 3Ni 0 .2 4Mo 0 .11Ti。
短句来源
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  特低
     reservoir permeability is extra-low, accounting 0.013×10 -3-13×10 -3 μm 2 to the formation water;
     渗透率特低 ,地层水测渗透率为 0 .0 13× 10 -3 ~ 13×10 -3 μm2 ;
短句来源
     Such reservoirs can be divided into conventional low mobility,extra-low reservoir and ultra-low mobility reservoirs according to mobility and production performance.
     根据流度大小以及油藏在开发生产中表现出的特征,可将低流度油藏分为一般低流度油藏、特低流度油藏和超低流度油藏。
短句来源
     Early Production of Low Permeability Extra-low Permeability Sandstone Reservoirs in Fault Block FA 2 of SN Oilfield
     SN油田FA2断块低渗-特低渗砂岩油藏早期开发研究
短句来源
     The technology was used in 11 wells from 2004 to 2005 with technical success rate of 91%, efficiency of 81.8%, cumulative oil increment of 3058t and input output ratio of 1:9. The diverting fracturing technology is promising way to improve recovery ratio of extra-low permeability reservoir in Pingbei Oilfield.
     2004~2005年现场应用11井次,工艺成功率91%,有效率81.8%,累计增油3058t,投入产出比1:9。 暂堵压裂技术的应用旨在为进一步提高坪北特低渗油藏采收率探索一条新途径。
短句来源
     Dynamic Evaluation of Development Feasibility in Extra-low Permeability Reservoirs
     特低渗油藏开发可行性动态评价
短句来源
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  “extra-low”译为未确定词的双语例句
     for sugarcane: extra-low<45ppm, low: 45-60ppm, middle: 60-95ppm, and high > 95ppn.
     甘蔗为极低<45ppm,低45~60ppm,中60~95ppm,高>95ppm;
短句来源
     For rice growing: extra-low <40ppm, low: 40-70ppm, middle: 70-90ppm, and high>90ppm;
     水稻为极低<40ppm,低40~70ppm,中70~90ppm,高>90ppm;
短句来源
     The structure evolution of a Nb-microalloyed extra-low carbon steel 0.03C-1.05Mn-0.6Cr-0.08Nb during(1 200) ℃ heating,then cooling to 850 ℃ and reducing 50%,holding at 850 ℃ for 20~(1 000) s fast cooling to 450 ℃,air cooling has been simulated and tested by Thermecmastor-Z thermal simulator.
     用Thermecmastor-Z型热模拟机模拟试验了成分(%)为:0.03C-1.05Mn-0.6Cr-0.08Nb的Nb超低碳钢加热1 200℃后冷至850℃压缩变形50%,并在850℃下保温20~1 000 s后快冷至450℃,再空冷的过程中的组织演变。
短句来源
     On the basis of the analyses of dynamic and static data, the distribution and controlling factors of the remaining oil in extra-low permeability reservoir are revealed, including microfacies, reservoir heterogeneity, micro-tectonics and well network condition and so on.
     在沉积微相、储层非均质性及微构造研究的基础上,采用动态、静态结合的分析方法阐明了研究区特低渗透油藏的剩余油分布规律及控制因素,揭示了沉积微相、储层非均质、微构造及井网条件等因素对剩余油分布的控制作用。
短句来源
     The influence of oxygen releasing from furnace lining on removal of nitrogen in extra-low carbon steel during smelting has been studied using 20 kg vacuum-induction furnace with 99.99% magnesia rammig lining.
     采用 99.99%氧化镁砂捣打炉衬的 2 0kg真空感应炉 ,研究了超低碳钢熔炼时炉衬产生的氧对真空钢液脱氮的影响。
短句来源
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  extra-low
The phenomenon of strain-induced porosity (SIP) in extra-low interstitial (ELI) grade Ti-6Al-4V with a transformed β starting microstructure is investigated to understand its origin during α-β cogging.
      
Strain-induced porosity during cogging of extra-low interstitial grade Ti-6Al-4V
      
Removal of oxygen in titanium aluminide (TiAl) by chemically active calcium-aluminum (Ca-AI) alloy was carried out around 1373 K with the purpose of obtaining extra-low-oxygen TiAl.
      
This article deals with the influence of processing parameters of a new procedure for ferritic rolling on the recrystallized microstructure of extra-low-carbon (ELC) steels.
      
Influence of processing parameters on the recrystallized microstructure of extra-low-carbon steels
      
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A cyclic simple shear test apparatus, based on a static simple shear test apparatus which has been developed in Nanjing Hydraulic Research Institute since 1964, is constructed. This apparatus is composed of a simple shear box, an electro-magnetic exciter, the static loading system and the electronic recording system. A sample with diameter of 7cm and height of 2cm is enclosed inside a rubber membrane which is in turn confined by steel rings and is attached rigidly to the end plates. By means of the horizontal...

A cyclic simple shear test apparatus, based on a static simple shear test apparatus which has been developed in Nanjing Hydraulic Research Institute since 1964, is constructed. This apparatus is composed of a simple shear box, an electro-magnetic exciter, the static loading system and the electronic recording system. A sample with diameter of 7cm and height of 2cm is enclosed inside a rubber membrane which is in turn confined by steel rings and is attached rigidly to the end plates. By means of the horizontal loading system the initial shear stress is applied to the sample. The vertical and horizontal loads are applied pneumatically and are controlled seperately by two regulating valves.The base of the simple shear box is connected with the excitor which applies the cyclic shear stress to the sample. The amplitude and the frequency of excitation is controlled by the extra-low frequency signal generator, and the signal generated by the latter is amplified and input to the excitor. The max. exciting force is 120kg, and the frequency generally used is 2~3 Hz. During the test the variation of dynamic shear stress, pore pressure and displacement are measured by the transducers and are recorded by the oscilloscope.This apparatus has been now tested, adjusted, and used to investigate the characteristics of liquefaction of some saturated sand samples. It is shown that this apparatus works fairly well. Furthermore, its construction is simple, and it can be operated easily. Therefore it is concluded that this apparatus may be used to study the dynamic behaviour of the soil either for the practical engineering project or for the research purpose.

在我所1964年制成的静力单剪仪的基础上,研制了一种振动单剪仪。此仪器由剪切盒、静力加荷系统、电磁式激振器和电子测量系统组成。剪切盒由多个圆环迭成,圆环内有橡皮膜,在其中安装试样.垂直和水平荷重是用气压施加的,并且分别由两个调压阀控制。利用水平加荷设备,可以使试样在各种不同的初始剪应力下振动.激振力是由超低频讯号发生器发出的讯号,通过功率放大器放大,再输入激振器而产生的。最大激振力为120kg,常用的频率为每秒2周。利用这种仪器,可以测量不排水试样在各种振动过程中的动剪应力、孔隙压力和位移,并确定其动剪切模量、阻尼比或液化强度等。经过初步试验,证明其性能尚佳.此仪器结构简单,加工容易,电子仪器设备可用国内产品配套,进行试验时制备试样和操作都比较方便,是目前一种比较实用的研究土的动力性质的仪器.

This paper was aimed at investigatiing the influence of post-weld heat treatmenton the mechanical properties of stainless steel overlaid joint and discussing the relaiionbetween the change in impact toughness and micro structure in the overlaid cladding.The base metal was Q-T treated Ni Cr-Mo-V high strength steel.In the inner surfaceof vessel two layers of clad metal were deposited by submerged arc weldingwith chromium-nickel stainless steel strip as the consumable electrode.The first layerwas 0Cr20Ni10 and...

This paper was aimed at investigatiing the influence of post-weld heat treatmenton the mechanical properties of stainless steel overlaid joint and discussing the relaiionbetween the change in impact toughness and micro structure in the overlaid cladding.The base metal was Q-T treated Ni Cr-Mo-V high strength steel.In the inner surfaceof vessel two layers of clad metal were deposited by submerged arc weldingwith chromium-nickel stainless steel strip as the consumable electrode.The first layerwas 0Cr20Ni10 and the second layer was 00Cr20Ni10 stainless steel.A seriesof test specimens were taken from the overlaid cladding,bonding line and heataffected zone of welded pieces,which had been heat treated at 600,625,650and 680℃ for 15,30,50 and 100 hours.The results obtained are as follows:(1)The post-weld heat treatment temperature shouldnt be over 650℃ for Q-Ttreated Ni-Cr-Mo-V high strength steel.(2)All side bending specimens are freeof cracks after bending,but the ductility in the bonding area decreases with increasedtime of post-weld heat treatment and its temperature.Ductility loss is associatedwith the width of diffusion of carbon from base metal to the overlaid cladding.(3)The toughness of the overlaid cladding decreases with increased time of post-weld heat treatment and its temperature.The decrease of toughness also depends onferrite content and carbon content.(4)0Cr20Ni10 low carbon stainless steelcladding is less susceptible to embrittlement than 0Cr20Ni10Nb cladding.(5)The embrittlement of 00Cr20Ni10 extra low carbon overlaid cladding after post-weldheat treatment is due to the Cr23C6 precipited along the ferrite boundries as wellas the formation of a very small amount of (?) phase.

本文研究了焊后热处理对不锈钢堆焊接头机械性能的影响,并探讨了堆焊层韧性和显微组织变化之间的关系。母材是调质处理的Ni-Cr-Mo-V 高强钢。容器内壁采用双层带极埋弧堆焊工艺,过渡层和不锈层分别为0 Cr20Ni10和00 Cr20Ni10不锈钢。试件取自堆焊层、接合区和热影响区,其焊后热处理工艺是600、625、650和680℃并均分别保温15、30、sO和100小时。试验结果如下:(1)对调质处理的Ni-Cr-Mo-V 高强钢,焊后热处理温度不得高于650℃。(2)冷弯后所有侧弯试件都未出现裂纹,但接合区的延性却随加热温度的提高和保温时间的延长而减少。延性减少与接合区中碳扩散层宽度有关.(3)堆焊层韧性随加热温度的提高和保温时间的延长而减少。它也与堆焊层的焊态铁素体含量和含碳量有关.(4)0Cr20Ni10不锈钢堆焊层的抗脆化性能高于0 Cr20Ni10Nb 堆焊层.(5)对00Cr20Ni10超低碳堆焊层热处理后产生脆化的原因是沿铁素体相析出Cr23C6和形成极少量的σ相.

Silicon content severly influences the behavior of intercrystalline corrosion of the extra low carbon, Cr-Ni austenite stainless steels in strong oxidizing concentrated nitric acid. In sensitized high purity stainless steel containing Si less than 0.1% the intergranular corrosion susceptibility decreases while in non-sensitized high Si stainless steel containing Si more than 2% the intergranular corrosion susceptibility decreases. The modelling of correlation between Si content and corrosion rate of extra low...

Silicon content severly influences the behavior of intercrystalline corrosion of the extra low carbon, Cr-Ni austenite stainless steels in strong oxidizing concentrated nitric acid. In sensitized high purity stainless steel containing Si less than 0.1% the intergranular corrosion susceptibility decreases while in non-sensitized high Si stainless steel containing Si more than 2% the intergranular corrosion susceptibility decreases. The modelling of correlation between Si content and corrosion rate of extra low carbon, Cr-Ni austenite stainless steels has been identified in 98% smoke nitric acid. Based on the distribution profile of test data, the following exponential model has been selected:Y=B1+B2exp-[B3(X-B4)2]where Y is corrosion rate (g/m2.h); X is Si content in steel (%); B1, B2, B3, B4 is model parameters. These parameters were estimated by simplex searching method.

超低碳铬镍奥氏体不锈钢中的硅含量,对钢在强氧化性介质浓硝酸中晶间腐蚀行为,有着重要的影响,硅含量小于0.1%的高纯不锈钢,可降低敏化态晶间腐蚀,而硅含量大于2%的高硅不锈钢则可以降低非敏化态晶间腐蚀。 本文采用电子计算机对超低碳铬镍奥氏体不锈钢在98%发烟硝酸中腐蚀率和钢中硅含量关系的数学模型,进行了辨识。根据试验数据散点图形状,选定指数模型: Y=B_1+B_2exp〔-B_3(X—B_4)~2〕,其中Y为腐蚀率(g/m~2·h),X为钢中硅含量(%),B_(19) B_(29) B_(39) B_4为模型参数。模型参数采用非线性回归的单纯形搜索法进行估计。

 
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