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ultra fine grains
相关语句
  超细晶
     Severe plastic deformation (SPD) processing, especially Equal-Channel Angular Pressing (ECAP), has attracted increasing interest recently with its prominent advantages, such as cleanness and densification, in obtaining materials of ultrafine grains/nanocrystallines.
     采用强烈塑性变形(SPD)方法尤其是等通道转角挤压(Equal-Channel Angular Pressing简称ECAP)制备块体超细晶/纳米晶材料具有清洁致密等优点而受到越来越多的关注。
短句来源
     We suggest that when the size small than 0.1μm, we call Nano grains, then 0.1~1μm micro grain, 1~5 μm ultra fine grains, 5~10 μm fine grains and if it is over 10μm, we can discuss its fine function taking care of it steel grades, dimensions and shape.
     建议把晶粒尺寸在 0 .1 μm以下 ,称为纳米晶 ,0 .1~ 1 μm称为微细晶 ,1~ 5 μm称为超细晶 ,5~ 1 0 μm称为细晶粒 ,1 0 μm以上可根据产品的钢种、形状和尺寸的特点来探讨晶粒细化作用。
短句来源
     Severe plastic deformation (SPD) processing, especially Equal-Channel Angular Processing (ECAP) of steel and other iron-based alloys, has achieved increasing interest recently because of the potential for obtaining ultrafine grains and improving the properties.
     近年来,强烈塑性变形特别是钢和铁基合金的等径弯曲通道变形因为具有获得超细晶组织和改善性能的潜力,引起了各国研究人员的很大兴趣。
短句来源
     Equal Channel Angular Processing (ECAP) can carry out the strongly processing and obtain ultrafine grains and improve the properties of materials.
     等径弯曲通道变形(简称ECAP)能实现材料的强烈塑性变形,获得超细晶组织,从而改善材料的综合性能.
短句来源
     Steel and other iron-based alloys can have ultrafine grains and improved properties by equal channel angular processing(ECAP).
     钢和铁基合金通过等径弯曲通道变形(ECAP)可获得超细晶组织,从而改善材料的性能。
短句来源
  超细晶粒
     The Ultrafine Grains Q235 Steel Plates Were Prepared
     Q235钢超细晶粒钢板的制备
短句来源
     During drawing, the particles of FCC γ Fe which has a good coherency with Cu matrix transform to α Fe (BCC) and produce stress in the maxtrix, therefore fine texture structures are cut apart by the stress, and ultrafine grains are obtained.
     同时形变诱发与α(Cu)固溶体共格的γ Fe(Cu)转变为α Fe(Cu) ,促进了超细晶粒的形成。
短句来源
     Fatigue Strength of Welded Joints for Architecture Reinforcement Steel Bar With Ultrafine Grains
     超细晶粒钢筋焊接接头的疲劳强度
短句来源
     The NiTi alloy was surface remelted by a Nd-YAG laser. The microstructure of themelted layer was clean, compact and with less inclusions and ultrafine grains.
     利用Nd-YAG激光对NiTi合金进行激光重熔处理,在适宜的激光参数下,重熔层组织得到明显净化,夹杂物显著减少,致密度提高,能获得超细晶粒,重熔层与基体金属之间具有很高的结合强度。
短句来源
     The microstructure in explosively formed projectiles (EFP) has been investigated, The results showed that, due to adiabatic temperature rise and special plastic deformation mechanism, dynamic recovery and dynamic recrystallization have occurred in explosively formed projectiles (EFP). Submicron grains with a size of 0 3~1 5μm have been formed by dynamic recovery, while uniform ultrafine grains with a size less than 5μm have been formed by dynamic recrystallization.
     研究了工业纯铁爆炸成形弹丸内微观组织变化 ,结果表明 :由于绝热温升和特有的塑性变形机制 ,弹丸在成形过程中内部组织发生动态回复和动态再结晶 ,动态回复形成亚晶 ,因变形量不均匀使亚晶粒直径分布在 0 3~ 1 5 μm之间 ,动态再结晶使弹丸内形成均匀的小于 5 μm的超细晶粒
短句来源
更多       
  超细晶
     Severe plastic deformation (SPD) processing, especially Equal-Channel Angular Pressing (ECAP), has attracted increasing interest recently with its prominent advantages, such as cleanness and densification, in obtaining materials of ultrafine grains/nanocrystallines.
     采用强烈塑性变形(SPD)方法尤其是等通道转角挤压(Equal-Channel Angular Pressing简称ECAP)制备块体超细晶/纳米晶材料具有清洁致密等优点而受到越来越多的关注。
短句来源
     We suggest that when the size small than 0.1μm, we call Nano grains, then 0.1~1μm micro grain, 1~5 μm ultra fine grains, 5~10 μm fine grains and if it is over 10μm, we can discuss its fine function taking care of it steel grades, dimensions and shape.
     建议把晶粒尺寸在 0 .1 μm以下 ,称为纳米晶 ,0 .1~ 1 μm称为微细晶 ,1~ 5 μm称为超细晶 ,5~ 1 0 μm称为细晶粒 ,1 0 μm以上可根据产品的钢种、形状和尺寸的特点来探讨晶粒细化作用。
短句来源
     Severe plastic deformation (SPD) processing, especially Equal-Channel Angular Processing (ECAP) of steel and other iron-based alloys, has achieved increasing interest recently because of the potential for obtaining ultrafine grains and improving the properties.
     近年来,强烈塑性变形特别是钢和铁基合金的等径弯曲通道变形因为具有获得超细晶组织和改善性能的潜力,引起了各国研究人员的很大兴趣。
短句来源
     Equal Channel Angular Processing (ECAP) can carry out the strongly processing and obtain ultrafine grains and improve the properties of materials.
     等径弯曲通道变形(简称ECAP)能实现材料的强烈塑性变形,获得超细晶组织,从而改善材料的综合性能.
短句来源
     Steel and other iron-based alloys can have ultrafine grains and improved properties by equal channel angular processing(ECAP).
     钢和铁基合金通过等径弯曲通道变形(ECAP)可获得超细晶组织,从而改善材料的性能。
短句来源
  “ultra fine grains”译为未确定词的双语例句
     Yield strength of low carbon microalloyed steels with ultrafine grains reaches at 600 MPa, and yield strength of ultra low carbon microalloyed steel is over 800 MPa.
     低碳微合金钢的屈服强度达到了600 MPa,超低碳微合金钢的屈服强度超过了800 MPa。
短句来源
     Preparation of Si-Al-Zr-O Composite Ceramics with Ultra Fine Grains by in situ Controlled Crystallizing from the Amorphous Bulk
     非晶晶化法制备Si-Al-Zr-O系超微细晶复相陶瓷
短句来源
     The microstructural evolution of carburized 20CrMnTi steel, has been investigated during warm deformation The results show that the grains with size of 16μm~20μm were refined to 2μm~3μm,even less than 1μm during deformation The form of ultrafine grains was controlled by both the grain boundary sliding and local deformation of materials near grain boundary The grain boundary sliding and local deformation depended on the deformed parameters, especially the strain rates
     研究了渗碳 2 0CrMnTi钢温变形过程中微观组织演化规律 ,结果表明 :通过温变形 ,渗碳 2 0CrMnTi钢的晶粒由 16 μm~ 2 0 μm超细化到 2 μm~ 3μm ,甚至 1μm以下 ; 晶界区域局部变形和晶界滑动控制晶粒的细化 ;
短句来源
     The results show that the ultrafine grains induced by DCAP are quite stable, remaining in size of 0.6μm up to the annealing temperature of 330℃.
     结果表明: 材料经DCAP变形退火后的晶粒在330℃左右仍能保持较细的晶粒度, 晶粒大小约为0 6μm;
短句来源
     Magnetic Properties of Fe-Based Alloys with Ultrafine Grains and their Application
     铁基超微晶合金的磁性和应用
短句来源
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  ultra fine grains
The value of ultimate strength of 2A12 Al alloy increases by 135%, hardness by 51%, and ultra fine grains of about 200 nm can be observed after 8 passes.
      
These ultra fine grains are formed as a result of burning, pedogenic processes, or bacterial processes.
      
In addition, the sizes of the ultra fine grains are almost five times smaller than the sub-grains of the CP sample.
      
Her bachelor's thesis work was focused on synthesis of Ultra-fine grains of ZnO and analysis of its properties.
      
Grain growth inhibitors and glass were doped to the calcined BaTiO3 powders to prepare the dense dielectric ceramics of ultra-fine grains.
      


IN this paper,a process of rapid heating by means of electrical contact to get ultra-fine grain microstructure for 65 and 50CrVA Steel wires is presented.Under certain preliminary plastic defor- mation,a single cycle of heat treatment can produce ultra-fine grain of austenite up to ASTM 11 grade or even finer.The mechanical property of steel wires can be further raised by the aid of cold working after ultra-fine grain treatment.With orthogonal test method,it...

IN this paper,a process of rapid heating by means of electrical contact to get ultra-fine grain microstructure for 65 and 50CrVA Steel wires is presented.Under certain preliminary plastic defor- mation,a single cycle of heat treatment can produce ultra-fine grain of austenite up to ASTM 11 grade or even finer.The mechanical property of steel wires can be further raised by the aid of cold working after ultra-fine grain treatment.With orthogonal test method,it was found that the remar- kable factor influencing the grain size of austenite is heating rate,and the optimum parameters for these steel wires have been determined.

本文研究了65、50CrVA 钢丝采用电接触快速加热(100℃/s)处理获得超细晶粒的方法。在一定变形度下一次处理可得到 ASTMll 级以上的超细晶粒。试探了超细晶粒处理后再变形以提高力学性能。应用正交试验法确定了获得超细晶粒的最显著影响的因素是加热温度,并确定了最佳的工艺参数。

New breakthroughs presently achieved in manufacturing processes of barium salts can be considered as the reduction of baryte by using natural gas or coal gas in fhidized furnace of high reduction rate; the high temperature direct catalytic conversion of baryte with the appropriate addition of alkali metal barium carbonate to produce preeipitated barium sulfate or the double decomposition to produce barium carbonate: the production of barium salts by ion-exchange and the development of new varieties of particle,...

New breakthroughs presently achieved in manufacturing processes of barium salts can be considered as the reduction of baryte by using natural gas or coal gas in fhidized furnace of high reduction rate; the high temperature direct catalytic conversion of baryte with the appropriate addition of alkali metal barium carbonate to produce preeipitated barium sulfate or the double decomposition to produce barium carbonate: the production of barium salts by ion-exchange and the development of new varieties of particle, fiue grain, ultra-fine grain barium salts and barium salts exclusively for electronic and speical purpose us es. The key point in the development of China's barium salts industry should be put on the improving of product quality and product mix.

目前钡盐工艺技术的新突破是:重晶石还原采用高还原率的沸腾炉,用天然气或煤气还原剂;重晶石加入适当的碱金属碳酸盐直接高温催化转型制沉淀硫酸钡或复分解制碳酸钡;离子交换法制钡盐;颗粒、微粒、超微粒以及电子和专用钡盐的新品种不断开发。我国钡盐工业的发展重点应放在提高产品质量和改进产品结构上。

Laser transformation hardening of Ger 15 bearing steel at low tem-perature tempering condition is studied.Experimental work were carried outto determine the effect of technical parameters of laser treatment on the micro-structures,change of hardness in the hardened layer,distribution of residualstress,quantities of retained austenite and wear resistance The results demon-strated that the surface hardness of Gcrl5 steel through laser hardeningattained as high as above Hv 1000.The microstructures were oryptocrystallinemartensite...

Laser transformation hardening of Ger 15 bearing steel at low tem-perature tempering condition is studied.Experimental work were carried outto determine the effect of technical parameters of laser treatment on the micro-structures,change of hardness in the hardened layer,distribution of residualstress,quantities of retained austenite and wear resistance The results demon-strated that the surface hardness of Gcrl5 steel through laser hardeningattained as high as above Hv 1000.The microstructures were oryptocrystallinemartensite with a high density of dislocation,whose grain size was ASTM14~#.The retained austenite was about 20% with film-like distribution withinthe plates of martensite or round the carbides.Ultra-fine grains were scatter-ingly distributed,rather high compressive residual stresses were measured inthe surface region and the wear resistance was enhanced significantly.Basedon these results,it is supposed that the strengthening and toughening mecha-nism from laser transformation hardening is the combined merits of grain refi-nement strengthening,substructure strengthening,precipitation hardening andretained austenite strengthening.

本文对低温回火态Gcr15轴承钢的激光相变硬化处理进行了研究.试验了激光处理的工艺参数对硬化过程的显微组织、淬硬层的硬度变化、残余应力分布、残留奥氏体形貌与数量以及耐磨性能等的影响.结果表明:经激光相变硬化处理后,Gcr15钢的表面硬度可达HV1000以上,硬化层的显微组织为缺陷密度高的隐针马氏体,晶粒度为ASTM 14级,残留奥氏体约达20%,呈膜态分布于马氏体条片之间及碳化物周围,超细的碳化物非常弥散地分布着,表面层保持较大的压应力而耐磨性能明显提高.据此,可以认为激光相变硬化的强韧化机制是:晶粒细化强化、亚结构强化,弥散析出强化以及残留奥氏体强化等的综合贡献.

 
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