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   precipitation 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.141秒
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precipitation
相关语句
  沉淀
    Atomic-Scale Computer Simulation for Alloy during Early Precipitation Process
    合金早期沉淀过程的原子尺度计算机模拟
短句来源
    ON THE METALLURGICAL PROBLEMS OF SOME PRECIPITATION HARDENING STAINLESS STEELS
    某些沉淀硬化不锈钢的金属学问题
短句来源
    AN ELECTRON MICROSCOPE OBSERVATION OF INTERPHASE CARBIDE PRECIPITATION IN 10MoWVNb
    10MoWVNb钢中相间沉淀碳化物的电镜观察
短句来源
    PRECIPITATION AND PRECIPITATION STRENGTHENING OF NIOBIUM CARBIDE IN FERRITE IN MICROALLOYED STEEL
    微合金钢中碳化铌在铁素体中的沉淀沉淀强化
短句来源
    A NOTE ON CARBIDE PRECIPITATION IN Fe-Si-C ALLOY
    Fe-Si-C合金中的碳化物沉淀
短句来源
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  析出
    THE PRECIPITATION OF BN IN ISOTHERMAL TREATMENT PROCESS
    等温处理过程中BN的析出行为
短句来源
    EFFECT OF AUSTENITIZING TEMPERATURE ON BORIDE PRECIPITATION IN LOW CARBON STEEL
    奥氏体化温度对低碳钢硼化物析出的影响
短句来源
    PRECIPITATION OF γ′-PHASE AND CONTROLLED HEAT TREATMENT OF IRON-NICKEL-BASE SUPERALLOYS
    γ′的析出规律与铁镍基高温合金的控制热处理
短句来源
    THE BEHAVIOUR OF BORON-CONTAINING PHASE PRECIPITATION DURING HEATING IN 40MnB STEEL
    40MnB钢加热时硼相析出行为的研究
短句来源
    OBSERVATION ON PRECIPITATION ALONG GRAIN BOUNDARY IN Cu-Ni-Mn ALLOY
    Cu-Ni-Mn合金晶界析出特点的观察
短句来源
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  “precipitation”译为未确定词的双语例句
    Studies on Precipitation Reaction and Dislocation Microstructures of TiAl Based Intermetallic Compounds
    TiAl基金属间化合物的脱溶反应和位错结构研究
短句来源
    THE INFLUENCE OF γ-RAY IRRADIATION TO PRECIPITATION OF CARBON IN α-IRONS
    γ辐照对碳在α-铁中脱溶的影响
短句来源
    PRECIPITATION CHARACTERISTICS OF METASTABLE β PHASE IN TITANIUM ALLOY TB2
    TB2钛合金亚稳β相的分解特性
短句来源
    TEM STUDY OF SECONDARY CARBIDES PRECIPITATION IN LOW ALLOYED HIGH SPEED STEEL DURING TEMPERING
    低合金高速钢回火过程中特殊碳化物沉淀的电镜研究
短句来源
    STUDY 0I ARBIDE PRECIPITATION OF HIGH WEAR RESI TANCE STEELS AFTER TEMPERING
    高耐磨钢回火过程中碳化物沉淀的透射电镜研究
短句来源
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  precipitation
The water-soluble glucan was obtained from Pleurotus florida fruit bodies by hot water extraction, ethanol precipitation, DEAE cellulose dialysis and Sephadex G-75 gel filtration.
      
Preparation and characterization of nanocrystalline ZnO by direct precipitation method
      
Nanocrystalline ZnO was prepared with ZnCl2·2H2O and (NH4)2CO3 as raw materials by direct precipitation method.
      
The ion-exchanger LiAlTiO4 of spinel type was prepared by the common precipitation/hydrothermal crystallization method, and was acid-modified.
      
The precursors of Fe2O3-SiO2 mixed oxides prepared through co-precipitation method were modified by microwave hydrothermal treatment for the first time.
      
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It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced...

It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced during the initial stage of precipitation.

一般认为钢的变脆例如蓝脆和回火脆都与钢中的扩散和沉淀有关系。本文尝试用内耗测量的方法研究碳与氮在α-铁及碳素钢中的扩散、脱溶和沉淀,从而进一步地了解钢的变脆的机构。实验的结果指出,碳在α-铁中的扩散不受自身浓度、合金元素和沉淀历史的影响。氮的情形与碳显著不同,合金元素使氮的扩散变慢,在沉淀初期使氮的扩散加速。 较有系统地研究了碳、氮在加工后的α-铁中脱溶时所引起的内耗峰(当振动频率约为每秒1周时出现在250℃左右),发现了高温淬火在含碳或氮较多的试样中所产生的内应力也可以引起这个内耗峰。实验指出:①这个脱溶内耗峰的出现条件与钢的蓝脆的出现条件相同,都是一种应变时效或淬火时效的现象;②与这个内耗峰有关的碳、氮是处于原子的状态。这些联系使我们认为钢的蓝脆是一种应变脱溶或淬火脱溶的过程,是由于原子状态的碳或氮聚集于钢中的内应力区域或晶体缺陷(例如原子脱节)中所引起来的。关于这方面的深入研究正在继续进行中。 根据本实验及以前关于钢铁中碳氮的扩散、脱溶和沉淀所得的结果,对于钢的回火脆的机构也提出了一种初步的看法。回火脆是一种回火沉淀的过程,引起回火脆的沉淀似乎是氮化物而不是碳化物。

The effect of hot working on the graphite formation in 1.1—1.2% carbon toolsteels during subsequent annealing was investigated.Specimens were heated in air to1050℃ for 10 minutes,cooled in a second furnace to the forging temperature,forged rapidly to give reductions in height between 0—40%,air-cooled,and annealed for16 hours at 700℃.Graphite was determined by chemical analysis.It was foundthat:1.Austenitizing in air between 870°and 1050℃ followed by air cooling causedthe formation of graphite during subsequent...

The effect of hot working on the graphite formation in 1.1—1.2% carbon toolsteels during subsequent annealing was investigated.Specimens were heated in air to1050℃ for 10 minutes,cooled in a second furnace to the forging temperature,forged rapidly to give reductions in height between 0—40%,air-cooled,and annealed for16 hours at 700℃.Graphite was determined by chemical analysis.It was foundthat:1.Austenitizing in air between 870°and 1050℃ followed by air cooling causedthe formation of graphite during subsequent annealing.The amount of graphiteincreased with increasing austenitizing temperature.Precipitation of graphite occurredalong the austenite grain boundary.2.Hot working at various temperatures increased the tendency of graphitizationduring subsequent annealing.The amount of graphite formed was smallest whenthe specimens were forged at 870℃ and increased with increasing or decreasingtemperature.3.Slow cooling after the specimens had been heated to or hot worked at hightemperatures reduced the degree of graphitization,provided that free cementite wasabsent during hot working.4.Forging during continuous cooling removed the effect of previous heatingor hot working until the temperature was sufficiently low to produce free cementiteduring forging.Forging during cooling gave minimum amount of graphite whenthe forging was interrupted between 820°and 870℃.A possible explanation to account for the phenomena is suggested.

在热加工过程中,加热及加工温度对1.1—1.2%碳钢在加热或加工后空冷再进行球化退火时,渗碳体分解为石墨的作用有重要的影响。在奥氏体状态870℃以上,停止加工的温度愈高,以后石墨的析出作用也愈严重。高温加工后缓冷或在低温加工可以减轻石墨化的作用。

The decomposition of δ-ferrite at 750°,850° and 950℃ in quenched 18/8/3/1Cr-Ni-Mo-Ti stainless steel specimens has been studied microscopically,thetransformation products being electrolytically extracted and identified by X-raydiffraction method.At early stages of decomposition accicular austenite forms along certaincrystallographic planes of δ-ferrite.As a result,the remaining ferrite becomesenriched in Cr,Mo and impoverished in C,Ni,Mn,and was found to transformsubsequently to sigma which begins after heating...

The decomposition of δ-ferrite at 750°,850° and 950℃ in quenched 18/8/3/1Cr-Ni-Mo-Ti stainless steel specimens has been studied microscopically,thetransformation products being electrolytically extracted and identified by X-raydiffraction method.At early stages of decomposition accicular austenite forms along certaincrystallographic planes of δ-ferrite.As a result,the remaining ferrite becomesenriched in Cr,Mo and impoverished in C,Ni,Mn,and was found to transformsubsequently to sigma which begins after heating for 5-6 minutes at 850℃.Precipitation of titanium carbide first occurs in the ferrite grains,later itmakes appearance along the ferrite-austenite interphase boundaries and along thetwinning planes within the austenite grain.The precipitation of titanium carbideseems to have no appreciable effect on the sequence of decomposition of δ-ferrite.The impact value of the steel was found to decrease very markedly before thecommencement of the δ→σ transformation and it is considered that this mightbe associated with the titanium carbide precipitation.

应用金相法研究了18/8/3/1 Cr-Ni-Mo-Ti不锈钢经1300℃固溶处理后在950℃,850℃及750℃恒温分解初期金相组织的变化,并用电解分离及X射线衍射方法鉴定在不同恒温分解阶段δ-铁素体分解的产物。观察到由于提高了固溶处理温度,高温固定下来的铁素体极为不稳定,在分解为奥氏体的同时有TiC的沉淀出现。当δ→γ的转变,由于Cr,Mo等合金元素的偏聚不能继续进行时,才发现残留的δ-铁素体转变为σ-相。过去一般认为18/8型不锈钢在550—1000℃保温后,室温冲击靭性的降低是由于σ-相的沉淀所引起的,试验结果指出在σ-相出现之前,钢的冲击靭性已显著下降,这种现象可能与δ-铁素体分解初期TiC的沉淀有关。

 
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