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    Study on the Surface Treatment Process of H13 Type Hot Work Steel and Its Subsequent Thermal Fatigue and Erosion Behaviors
    作模具钢(H13型)表面处理及其疲劳、熔损性能研究
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    Study on the Mechanism and Process of Pulse Current Hot Joining of Alloys
    脉冲大电流焊接合金的机理和工艺研究
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    Effect of Melt-treatment on Hot Deformation Behavior of Aluminum Sheet Used for Easy-open Can
    熔体处理对易拉罐用铝材变形行为的作用研究
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    Microstructures and Properties of New Pype High-Cr Hot Working Die Steel
    新型高Cr作模具钢的组织与性能
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    Strengthening Mechanisms and Hot Deformation Characteristics of MP159 Alloy
    MP159合金的强化机理和态变形特性
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  热轧
    Computer Simulation, Microstructure Prediction and Technology Optimization of Plate and Strip Hot Rolling
    热轧板带的数值模拟、组织预报及工艺优化
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    DIRECT MEASUREMENT OF TRANSFORMATION TEMPERATURE OF METALS UNDER HOT ROLLING CONDITION
    直接测定热轧中金属相变温度的方法
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    A STUDY OF THE LIMIT EFFECT OF TECHNOLOGICAL LUBRICATION IN HOT ROLLING
    热轧工艺润滑极限效果的研究
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    INVESTIGATION ON HOT ROLLED DEEP DRAWN SHEET STEEL D08RE
    D08RE热轧深冲钢的试验研究
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    FLATNESS CONTROL OF HOT ROLLED STAINLESS STEEL PLATES
    热轧不绣钢板带的板形控制
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  热态
    Strengthening Mechanisms and Hot Deformation Characteristics of MP159 Alloy
    MP159合金的强化机理和热态变形特性
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    The Imitation of the Hot Steel Flow with the Plasticine
    用塑性泥模拟热态钢的流动
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    The Testing Method of Hot Splitting Strength of the Molding Sand
    型砂热态劈拉强度测试方法
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    THE HOT SIMULATING TEST RESEARCH OF SINGLE ELECTRODE DIRECT CURRENT ARC FURNACE
    单电极直流电弧炉热态模拟试验研究
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    Experimental study on cold state and hot state characteristics of continuous casting nozzles
    连铸机二冷段喷嘴冷态和热态特性的实验研究
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  热连
    Research into Working Behavior and Self-aligning Methods of Uniformly Distributed Load of Rolling Bearing in 2050CVC Hot Tandem Mills
    2050CVC热连轧机工作辊滚动轴承运行行为及自适应均载方法研究
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    Research on the Abnormal Vibration and Fault Monitoring for Heavy Thin-Slab Hot Rolling Mill
    大型薄板坯热连轧机异常振动与故障监测研究
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    A Study and Test for Driving System of the 1700 Hot—rolling Mills in Wuhan lron and Steel Co.——Analysis on the Causes of Gear Spindal Heavy Damage
    武钢1700热连轧机主传动系统测试研究——弧齿接手齿面严重损坏的原因分析
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    COMPUTER CONTROLLED PRESAGING PRESSURE-MODEL FOR CONTINUOUS HOT STRIP MILL
    带钢热连轧机计算机控制压力预报模型
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    PARAMETER MEASUREMENT OF 1700 mm HOT STRIP MILL AT BENXI IRON AND STEEL CO.
    本钢1700mm带钢热连轧机参数的测量
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    An immunoenhancing polysaccharide isolated from the hot aqueous extract of mature pods of Moringa oleifera was found to contain only D-glucose as a monosaccharide constituent.
          
    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.
          
    The performance indices of plywood, particleboard and medium density fiberboard (MDF), hot-pressed by nano-SiO2 (1%)/UF resin (F/U molar ratio=1.2), exceeded the requirements of the National Standard.
          
    The temperature in the sample and the distance from the hot surface of the sample was strongly linearly correlated.
          
    Heat-transfer process during hot-pressing of flakeboard
          
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    In order to determine the workability of cast iron with spheroidal graphite,the following tests have been conducted on this material in the as-cast and annealed condition:tensile tests,compression tests,Charpy impact tests,impacttensile tests,twisting tests,upsetting tests under the drop hammer and small-scaledrolling tests.Results from these tests show that the best hot-working temperature rangeof this material varies somewhat with the stress system applied and the speed ofworking,and in general lies...

    In order to determine the workability of cast iron with spheroidal graphite,the following tests have been conducted on this material in the as-cast and annealed condition:tensile tests,compression tests,Charpy impact tests,impacttensile tests,twisting tests,upsetting tests under the drop hammer and small-scaledrolling tests.Results from these tests show that the best hot-working temperature rangeof this material varies somewhat with the stress system applied and the speed ofworking,and in general lies between 700° and 1100℃.Within this temperaturerange,the maximum amount of working permissible for a single working operationvaries considerably with the stress system applied.Under tensile stresses,thismaximum amount of working lies between 28 and 57.6%;under predominentlycompressive stresses,it lies between 58.5 and 72.9%;while in the small-scaledrolling tests,the maximum reduction in thickness permissible for a single passlies between 38.6 and 44.3%.The maximum amount of working permissible is alsoaffected by the speed of working,being greater at lower speeds.Tests on industrial scale show that the upsetting and small-scaled rollingtests give results nearest to those from industrial tests.Charpy impact tests,impacttensile tests,upsetting tests and small-scaled rolling tests show more prominentlythe best hot-working temperature range than the other tests conducted.Results of the present research also indicate that cast iron with spheroidal graphitehas a higher strength and workability when subjected to compressive stresses thanto tensile stresses,that a brittle temperature range has been recorded between200° and 650℃,which varies with the speed of test.Judging from the variationof the resistance to deformation with the change of temperature and the speedeffect,this phenomenon is associated with blue brittleness.

    为了确定球墨铸铁的可塑性,曾进行了铸态和铸态经墨化热处理后的球墨铸铁在不同温度下的抗张试验、抗压试验、冲击弯曲试验、冲击抗张试验、撚扭试验、顶锻试验和小型压延试验庑┦匝橹赋?球墨铸铁的最好热加工温度范围随着应力体系和加工速度的不同而略有不同,但一般介于700℃和1100℃之间。在此温度范围内球墨铸铁能够耐受的最大加工量依所受的应力体系而有相当大的差別。在张应力作用下,此最大加工量介于28—57.6%之间,在主要为压应力作用下,介于58.5—72.9%之间;在小型压延试验中,其最大加工量则介于38.6—44.3%之间。最大加工量亦受速度的影响:实验室的试验指出,球墨铸铁在比较低速下加工有较高的塑性。在比较接近生产的条件下的试验结果指出:顶锻试验和小型压延试验给予最靠近生产试验结果的数值。冲击弯曲、冲击抗张、顶锻试验和小型压延试验给予比较明确的最好热加工温度范围,其他试验则不能给予很明确的结果。如果采用了测压仪、小型压延试验,还可以提供变形阻力的资料。试验结果指出:球墨铸铁在压应力作用下比在张应力作用下有较大的强度和塑性;其中温变脆温度依试验速度的变化而在200°—650℃之间变化,根据变形阻力和变脆温度范围的...

    为了确定球墨铸铁的可塑性,曾进行了铸态和铸态经墨化热处理后的球墨铸铁在不同温度下的抗张试验、抗压试验、冲击弯曲试验、冲击抗张试验、撚扭试验、顶锻试验和小型压延试验庑┦匝橹赋?球墨铸铁的最好热加工温度范围随着应力体系和加工速度的不同而略有不同,但一般介于700℃和1100℃之间。在此温度范围内球墨铸铁能够耐受的最大加工量依所受的应力体系而有相当大的差別。在张应力作用下,此最大加工量介于28—57.6%之间,在主要为压应力作用下,介于58.5—72.9%之间;在小型压延试验中,其最大加工量则介于38.6—44.3%之间。最大加工量亦受速度的影响:实验室的试验指出,球墨铸铁在比较低速下加工有较高的塑性。在比较接近生产的条件下的试验结果指出:顶锻试验和小型压延试验给予最靠近生产试验结果的数值。冲击弯曲、冲击抗张、顶锻试验和小型压延试验给予比较明确的最好热加工温度范围,其他试验则不能给予很明确的结果。如果采用了测压仪、小型压延试验,还可以提供变形阻力的资料。试验结果指出:球墨铸铁在压应力作用下比在张应力作用下有较大的强度和塑性;其中温变脆温度依试验速度的变化而在200°—650℃之间变化,根据变形阻力和变脆温度范围的变化可以比较肯定地认为这是一种蓝脆的现象。

    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。

    Under controlled hot working conditions, the specimens of killed and rimming

    在控制的热轧条件下,曾制备了四种不同晶粒大小和显微结构的镇静钢和沸腾钢“钢三”的试样进行了机械时效试验。衡量机械时效处理的后果采用了冲击、抗张、抗压和硬度四种试验。结果示:控制热轧条件可以改进“钢三”的显微结构,从而改善了“钢三”机械时效处理后的变脆倾向,其中镇静钢的显微结构和晶粒度可以在较大的范围内改变而成品均可以达到标准的要求,但沸腾钢则要严格地控制其显微结构和晶粒度才能合格。衡量机械时效处理的后果以比较刚性的试验如冲击试验和抗张试验较能给出明确和有规律的结果,抗压度验和硬度试验的结果软不明确而且规律性亦较差。机械时效处理后的性能的改变是冷加工和时效的综合结果。随着显微结构的不同,冷加工和时效在机械时效处理的总效果中所占的分量亦各异。

     
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