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temper embrittlement     
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  回火脆性
     Mechanism of Temper Embrittlement in 16Co14Ni10Cr2Mo Steel
     16Co14Ni10Cr2Mo钢回火脆性的研究
短句来源
     A Study of Temper Embrittlement for Hot-Wall Hydrogenation Reactor Material 2 1/4Cr-1Mo Steel
     热壁加氢反应器材料2 1/4Cr-1Mo的回火脆性研究
短句来源
     ON HIGH TEMPERATURE TEMPER EMBRITTLEMENT OF 1Cr17Ni2 STEEL
     1Cr17Ni2钢的高温回火脆性
短句来源
     Method of Auger electron spectroscopy analysis and its application for temper embrittlement of 2.25Cr-1Mo steels
     Auger电子能谱分析方法及其在2.25Cr-1Mo钢回火脆性中的应用
短句来源
     Influence of Applied Stress on Temper Embrittlement of 2.25Cr-1Mo Alloy Steel
     作用应力对2.25Cr-1Mo合金钢回火脆性的影响
短句来源
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  回火脆化
     A Study of Temper Embrittlement on 3Cr-1Mo-1/4V-Ti-B Steel Used for Hydrogenation Reactor
     加氢反应器用3Cr-1Mo-1/4V-Ti-B钢的回火脆化研究
短句来源
     A Study on Temper Embrittlement Overaging Phenomenon of Alloy Steel 2.25Cr-1Mo
     2.25Cr-1Mo合金钢回火脆化过时效现象的研究
短句来源
     An Experimental Study of Temper Embrittlement on 1.25Cr0.5Mo Used for Hydrogenation Reactor
     加氢反应器用1.25Cr0.5Mo钢的回火脆化试验研究
短句来源
     Effects of Hydrogen and Temper Embrittlement on the Local Brittle Fracture Stress of 2.25Cr-1Mo Steels
     氢与回火脆化对2.25Cr-1Mo钢局部脆断应力的影响
短句来源
     STRUCTURE AND TEMPER EMBRITTLEMENT OF LARGE SECTION 5Cr2NiMoVSi HOT-WORK DIE
     5Cr2NiMoVSi大截面热作模具钢的组织及回火脆化
短句来源
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  热脆性
     Making use of Bayesian Neural network,a prediction model has been established for improving the accuracy of checking temper embrittlement of steam turbine rotor steel(30Cr2MoV) by the electrochemical potentiodynamic reaction(EPR) method.
     为提高电化学动电位再活化法(EPR)检测汽轮机转子钢(30Cr2MoV)热脆性的检测精度,利用Bayesian神经网络建立了预测模型。
短句来源
     Development of Nondestructive Inspecting of Temper Embrittlement of Turbine Rotor Steel
     汽轮机转子钢热脆性的非破坏性检测法的开发
短句来源
     Genetic Programming Approach to Predicting Temper Embrittlement of Rotor Steels Using Electrochemistry Technique
     遗传规划在电化学法检测转子钢热脆性中的应用
短句来源
     The genetic programming approach was proposed to predict temper embrittlement of rotor steel(30Cr2MoV). Two independent data sets were obtained experimentally: training data and verifying data.
     在汽轮机转子钢热脆性电化学法无损检测技术的开发中,将遗传规划法应用到30Cr2MoV钢脆性转变温度预测模型的建立中,以提高其检测精度。
短句来源
  热脆化
     Application of Bayesian Neural Network in the EPR Method for Checking Temper Embrittlement of Steam Turbine Rotor Steels
     Bayesian神经网络在EPR法检测汽轮机转子钢热脆化性能中的应用
短句来源
     BP ARTIFICIAL NEURAL NETWORK PREDICTION ON TEMPER EMBRITTLEMENT OF STEAM TURBINE ROTOR STEELS
     基于BP神经网络的汽轮机转子钢热脆化性能的预测
短句来源
     Temper embrittlement is the third high-temperature damage type merely inferior to creep and fatigue of turbine materials.
     汽轮机材料的热脆化是仅次于高温蠕变和疲劳的第三大损伤形式。
短句来源
     The temper embrittlement of long-running turbine rotor steel mainly results from the phosphorus segregation in the grain boundary, and picric acid has a good selectivity to the phosphorus, produce the effect of intergranular attack, so the double loop EPR test was adopted to measure the reactive charge Qr in picric acid solution system.
     由于长时间运行的汽轮机转子钢的热脆化原因主要是P 在晶界的偏析,又由于苦味酸对P 有很好的腐蚀选择性并产生晶间腐蚀,所以在本项研究中,采用双环EPR 动电位再活化法在苦味酸系溶液中测得再活化电量。
短句来源
     Research on Nondestructive Test Technique for Detecting Temper Embrittlement of Steam Turbine Rotor
     汽轮机转子热脆化的非破坏性检测法研究
短句来源
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  temper embrittlement
Study on temper embrittlement control technique in steel 12Cr1MoV
      
Failure may occur catastrophically by fracture along grain boundaries when temper embrittlement induced by non-equilibrium, grain-boundary segregation (NGS) of phosphorus atoms.
      
Temper embrittlement control technique based on the theory of NGS and deformation induced phase transformation in low-alloy steel, 12CrlMoV (which is used in steam pipeline of ships), was experimentally investigated.
      
Temper embrittlement may be controlled and obviously improved by grain refinement.
      
Such steel is highly resistant to temper embrittlement and will thus facilitate increased efficiency in electricity generation through the use of higher operating temperatures and improvements in design.
      
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The rules of changes in mechanical properties of 406 steel during tempering have been studied.The fine structure of martensite and the type, morphology, distribution of carbide precipitates havebeen examined under a transmission electron microscope. The inter-relation between the mechanicalbehavior and the martensite substructure has also been studied. The results indicated that 406 steelpossesses high strength and high toughness after quenching and tempering at 300℃. The fine struc-ture is, lath martensite...

The rules of changes in mechanical properties of 406 steel during tempering have been studied.The fine structure of martensite and the type, morphology, distribution of carbide precipitates havebeen examined under a transmission electron microscope. The inter-relation between the mechanicalbehavior and the martensite substructure has also been studied. The results indicated that 406 steelpossesses high strength and high toughness after quenching and tempering at 300℃. The fine struc-ture is, lath martensite with high dislocation density. The majority of fine needle-like precipitateswithin martentite has been indentified to be ε-carbide which is highly coherent with the matrix, byelectron diffraction pattern analysis. Thin films of 2-3% retained austenite in net form have been dis-tributed between martensite laths. This steel contains 1.5% silicon and 0.5% molybdenum, so that thestability of ε-carbide and retained austenite can be maintained to a higher temperature, thereby de-laying and retarding the embrittlement trough of tempered martensite and improving the fracture ap-pearance. In addition, the temper embrittlement at about 360-500℃ is due to the precipitation of ce-mentite in interlath surface and the segregation of impurities at grain boundaries.

通过透射电镜观察和鉴别了406钢在回火过程中的力学性能变化规律和马氏体精细结构特征,碳化物种类、形态、分布及它们之间的关系。结果表明:406钢淬火并300℃回火后具有较高的强度和韧性,是高位错密度的板条马氏体和马氏体内大量的与基体高度共格的ε-碳化物弥散析出,及马氏体板条周围2~3%的残留奥氏体网状薄膜的贡献。同时钢中含有1.5%Si和0.5%Mo,提高了ε-碳化物和残留奥氏体的稳定性,从而推迟并减缓了马氏体回火脆性凹,改善了断裂形貌。360~500℃回火脆性是由于渗碳体在板条边界析出和杂质元素在晶界偏聚的结果。

The secondary temper embrittlement of 608 low alloy cast steel is inves- tigated in this paper. The experimental results show that the temperature of the secondary temper embrittlement range of 608 steel is about from 450°to 700℃.The relation curve between the tempering temperature and the impact va lue is obtained. A method to evaluate the secondary temper embrittlement of 608 steel by microstractural observation is established. Auger electron spectroscopy (AES) analysis shows that the secondary...

The secondary temper embrittlement of 608 low alloy cast steel is inves- tigated in this paper. The experimental results show that the temperature of the secondary temper embrittlement range of 608 steel is about from 450°to 700℃.The relation curve between the tempering temperature and the impact va lue is obtained. A method to evaluate the secondary temper embrittlement of 608 steel by microstractural observation is established. Auger electron spectroscopy (AES) analysis shows that the secondary temper embrittlement is caused mainly by the segregation of phosphorous, boron , etc.o at austenitic grain boundary. The existence and segregation of chromium , manganese, nickel, etc. at the austenitic grain boundary are also to increase the brittle tendency of 608 steel. Therefore, it is suggested that quenching through the brittle temperature range or adding enough molybdenum can avoid the secondary temper embrittlement of 608 cast steel.

本文研究了608钢第二类回火脆性问题。通过实验测得该钢此类脆性的温度区段 约450—700℃.初步探索了通过显微组织鉴别回火脆性的可能性。应用俄歇电子能 谱分析初步确认:回火后缓慢冷却过程中,磷、硼等杂质元素在原奥氏体晶界层的偏 聚,是使该钢产生回火脆性的主要原因;而铬、锰、镍等合金元素的存在及于近晶界 区的偏析,也是促进回火脆化的重要因素。指出了消除该钢回火脆性的途径:当在脆 化温区回火后可施以快速水冷;可在该钢原定成分的基础上附加适量的合金元素相.

An Auger electron spectroscopical study was made of the correlation between the temper brittleness and the grain boundary segregation of P together with alloying elements as Ni, Cr and Mn in steels 35CrMnSi and 35CrNi3 containing 450 ppm P. It was shown that the steels tested attributed substantially their temper brittleness to the P segregation along the prior austenite grain boundaries. Although in so called "ductile state", namely oil quenched at 1200℃, tempered at 625℃ for 1h and water quenched, a lot of...

An Auger electron spectroscopical study was made of the correlation between the temper brittleness and the grain boundary segregation of P together with alloying elements as Ni, Cr and Mn in steels 35CrMnSi and 35CrNi3 containing 450 ppm P. It was shown that the steels tested attributed substantially their temper brittleness to the P segregation along the prior austenite grain boundaries. Although in so called "ductile state", namely oil quenched at 1200℃, tempered at 625℃ for 1h and water quenched, a lot of P segregated already along the grain boundary, thus, the steels embrittled markedly. After embrittlement treatment by step cooling, intergranular P concentration increased sharply. During this treatment, the increasing rate of P segregation along grain boundary in Ni-Cr steel is greater than that in Cr-Mn-Si steel. The FATT of the steels tested is directly proportional to the intergranular P content. The intergranular segregation of Ni in Ni-Cr steel is related linearly to that of P. To the steels, the addition of La may improve their temper embrittlement owing to decrease of intergranular P concentration under similar state.

用Auger电子能谱(AES)研究了含磷450ppm的35CrMnSi和35CrNi3钢回火脆性与杂质元素磷及合金元素Ni,Cr,Mn晶界偏聚的关系。含磷钢的回火脆性主要是由磷在原奥氏体晶界偏聚所致。经1200℃油淬、625℃回火1h水冷的所谓“韧态”,磷已在晶界大量偏聚,钢已明显脆化;经阶梯冷却脆化处理后,晶界磷浓度成倍增加。在阶梯冷却脆化期间,Ni-Cr钢中磷的晶界偏聚速率比Cr-Mn-Si钢大。试验钢的FATT与晶界含磷量成正比;Ni-Cr钢中晶界Ni与磷呈线性关系。试验钢中加入La能够减少相同状态下的晶界磷浓度,从而改善钢的回火脆性。

 
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