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   case depth 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.205秒
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case depth     
相关语句
  渗层深度
    A STUDY OF MATHEMATICAL MODEL FOR GROWING OF CASE DEPTH AND RATE OF ABSORBING CARBON ON THE STEEL AT THE SURFACE
    渗层深度与钢表面碳吸收速率的数学模型
短句来源
    According the simultaneous control-figure, we can enact rational carbon potential and carburising time. Baseing on the technology, we can simultaneously assure the surface carbon concentration and case depth of carburising parts.
    根据综合控制图可制定出同时确保表面碳浓度与渗层深度的炉气碳势与渗碳时间,按此碳势与时间控制渗碳后,零件表面碳浓度及渗层深度可同时满足技术要求。
短句来源
    The paper presents the investigation of microhardness profile,case depth andmicrostructure of the specimen of 38CrMoAl,3Cr2W8V,W6Mo5Cr4V2 and 65Cr4W3Mo2VNbsteels,which were processed by non-pulse nitriding and two types of pulse nitriding at 545℃in the fluidized bed furnace.
    本文研究了38CrMoAl,3Cr2W8V,W6Mo5Cr4V2和65Cr4W3Mo2VNb 钢试样经545℃非脉冲和二种脉冲流态床氮化的渗层硬度曲线、渗层深度和显微组织。
短句来源
    If the case depth of 5CrMnMo steel is between 0. 8 ̄1. 2mm and the surface carbon concentration of it is between 0.8% ̄1.0%, the mechanical properties are the best and very suitable to the cold heading mould.
    其最佳渗层深度0.8~1.2mm、表面碳量应控制在0.8%~1.0%范围,可获得适用于冷镦模具的最佳力学性能。
短句来源
    40Cr structural steel (quenching) is treated with the technology of rare-earth alloying nitridecarboning in 4 hour, and its surface hardness and the case depth can reach HV5Kg and 0.297mm respectively.
    40 Cr结构钢 (调质 ) :稀土合金化氮碳共渗 4h后 ,表面硬度 HV5 Kg70 0 ,渗层深度0 .2 97mm.
短句来源
更多       
  渗碳层深度
    The Establishment of Simultaneous Control Figure of Case Depth and Surface Carbon Concentration
    渗碳层深度及表面碳浓度综合控制图的建立
短句来源
    This relationship model can be used to control the case depth and carbon distribution, it may also be used to design the carburizing process factors and control the carburizing automatically.
    论文通过对渗碳工艺的回归分析,建立了渗碳层深度和表面碳浓度与时间和碳势的关系,该关系可作为渗碳层深度和表面碳浓度的综合控制模型,能够用于工艺参数的优化设计和渗碳过程的自动控制。
短句来源
    The case depth is the most important quality index of carburized materials, and it is usually checked by selective examination. This traditional method is inefficient and low reliability.
    渗碳层深度是衡量渗碳质量的主要技术指标之一,传统的渗碳层深度检测方法是对大批产品采取抽样检查,不仅检测效率低,可靠性差,而且检测时需破坏样品。
短句来源
    In this thesis a mathematical model referring to the relationship between the case depth and carbon distribution by using a nonlinear regression.
    论文通过非线形回归分析,建立了渗碳层深度和碳浓度分布关系的数学模型。
短句来源
    A relationship model between the electric, magnetic inductivity and carbon concentration was built. So the relationship between case depth and the characteristics of carburized layer was established. All the results above can afford a theory and practice basis for the NDT ofcarburized layer depth.
    结合渗碳材料的碳浓度和组织状态对电导率和磁导率的影响规律,建立了渗碳材料电导率和磁导率与碳浓度的关系模型,利用该模型及渗碳层深度和碳浓度分布关系的数学模型,建立了渗碳层深度与渗层电磁性能的关系,为实现对渗碳层深度的无损检测提供了可靠的理论与实验基础。
短句来源
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  硬化层深度
    Steels: 20% 20 Cr, 20CrMo, 20CrMnTi were laser heat-treated to study the effects of alloying elements on case depth (width), miscrostructure, hardness distribution of hardened zone.
    本文研究了合金元素对低碳钢(20~#、20Cr,20CrMo、20CrMnTi)激光硬化层深度(宽度)、表层显微组织及硬化层内显微硬度分布的影响。
短句来源
    For diameter 26mm axle bar of CK45 steel,when surface hardness is 54~62HRC,core maximum hardness is 32HRC and case depth is 3 8~5 3mm,it has an optimum combination of strength and ductility. The axle bar will have high ultimate torsion and torsion fatigue life.
    对26m m C K45 钢轴杆,当表面硬度为54 ~62 H R C,硬化层深度为38 ~53 m m ,心部硬度< 32 H R C 时,轴杆具有最佳的强韧性,获得了较高的静扭强度和扭转疲劳寿命
短句来源
  层深度
    A STUDY OF MATHEMATICAL MODEL FOR GROWING OF CASE DEPTH AND RATE OF ABSORBING CARBON ON THE STEEL AT THE SURFACE
    渗层深度与钢表面碳吸收速率的数学模型
短句来源
    The Establishment of Simultaneous Control Figure of Case Depth and Surface Carbon Concentration
    渗碳层深度及表面碳浓度综合控制图的建立
短句来源
    Measurement of The Case Depth for 40Cr Steel Quenched in AQ251 Quenchant
    40Cr钢在AQ251淬火介质中淬硬层深度的测定
短句来源
    This relationship model can be used to control the case depth and carbon distribution, it may also be used to design the carburizing process factors and control the carburizing automatically.
    论文通过对渗碳工艺的回归分析,建立了渗碳层深度和表面碳浓度与时间和碳势的关系,该关系可作为渗碳层深度和表面碳浓度的综合控制模型,能够用于工艺参数的优化设计和渗碳过程的自动控制。
短句来源
    The results Showed that after vanadizing the surface hardness reached Hv_(0.1)2820~3010, the case depth reached 7~9μm. The wearability of vanadizing samples has increased by over ten times as compared with that of the conventional process.
    研究表明,渗钒后,表面硬度达Hv_(0.1)2820~3010,碳化钒层深度为7~9μm,耐磨性比常规热处理提高10倍以上。
短句来源
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      case depth
    The theoretically predicted case depth of 3.469 mm matched closely with the experimentally observed value.
          
    The influence of SPF conditions on oxidation rates was evaluated in terms of weight gain, α-case depth, and microhardness profile.
          
    The combined effect of Mo and Ni is much greater than that of either Mo or Ni alone in increasing case depth.
          
    Ni is more effective than Mo in increasing the case depth.
          
    It was also revealed that both Mo and Ni increased the case depth.
          
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    The present paper gives an introduction to the ion-nitriding process of titanium TA2 in the LD-50-ZT type ion-nitriding furnace. It discusses the factors controlling the formation and quality of the case structure, with emphasis on the various atmospheres (N2/Ar、 NH3-N2、 NH3-Ar、 NH3), the temperature range (750-1000℃) and the treating period employed. According to an analysis of the experimental results of the nitried case obtained at this stage by means of X-ray diffraction, metallographic method, case depth,...

    The present paper gives an introduction to the ion-nitriding process of titanium TA2 in the LD-50-ZT type ion-nitriding furnace. It discusses the factors controlling the formation and quality of the case structure, with emphasis on the various atmospheres (N2/Ar、 NH3-N2、 NH3-Ar、 NH3), the temperature range (750-1000℃) and the treating period employed. According to an analysis of the experimental results of the nitried case obtained at this stage by means of X-ray diffraction, metallographic method, case depth, hardness, brittleness and corrosion resistance testing, the reasonable process data which give rise to a harder wear- and corrosion-resistant case have been found.This paper also describes the effect of oxygen and hydrogen,the elimination of distortion and the method for keeping surface finish. In addition, some results of parts of titanium valves ion-nitried in an atmosphere of ammonia gas have also been dealt with in this article.

    本文叙述了在LD—50—ZT型离子氮化炉中,对工业纯钛TA_z试样进行离子氮化试验的方法.分别选用不同气源(N_2/Ar、NH_3—N_2、NH_3—Arl、纯NH_3)、温度(750~1000℃)、时间对TA:进行几十炉次试验,相应地进行表层X射线衍射分析,金相组织分析,渗层厚度、表面硬度和硬度梯度检测,并据以初步找到了工业纯钛离子氮化的合理工艺参数;还叙述了TA_2离子氮化后的脆性和耐腐蚀性试验情况、全部研试中出现过的问题,并作了分析;也简介了钛阀零件以纯NH_3为气源的离子氮化及其结果.

    The purpose of this work is to establish the quantitatuve relationships betweentechnological factors during gas carbonitriding and surface stracture napameters ofsteel 18c_rMnTi.the combined effect of these faetores are taken into account and ex-periments in this work are arranged according to the rules of orthogonal design me-thod and parabolic regress,Eight statistical formula which concern the influence ofcarbonitriding temperature,kerosene consumption and ammoni in-put on carbon andnitrigen content and their...

    The purpose of this work is to establish the quantitatuve relationships betweentechnological factors during gas carbonitriding and surface stracture napameters ofsteel 18c_rMnTi.the combined effect of these faetores are taken into account and ex-periments in this work are arranged according to the rules of orthogonal design me-thod and parabolic regress,Eight statistical formula which concern the influence ofcarbonitriding temperature,kerosene consumption and ammoni in-put on carbon andnitrigen content and their gradient in the surface layer case depth and the grades ofretained aystenite,martensite and carbide were derived from the experimental data.

    碳氮共渗工艺因素对渗层组织的影响是一个多因素共同作用的问题,其复杂性难以用单因素试验法定量地进行描述。本文采用二次回归正交设计法进行了方案设计,对试验数据进行了数据处理,并建立了共渗温度、煤油滴量及通氨量对渗层表面含碳量、表面含氮量、碳分布浓度梯度、氮分布浓度梯度、层深、残余奥氏体级别、碳化物级别、马氏体级别等八个数学表达式,较准确地反映了它们之间的规律性。

    From the appearance,mechanism and pnd prevention measures the contact- fatigue failures are classified into two kinds:“pitting”and“spalling”. Piting cracks initiate initiate at the surfacee and propagate at an acute angle to the surface under the action of alternating shear stress caused by contact and sliding forces,Then metal fragements are released from surface under the action of hydro- static pressure caused by the lubricating oil entered into the flaws. Spalling is be believed to be caused by alternating...

    From the appearance,mechanism and pnd prevention measures the contact- fatigue failures are classified into two kinds:“pitting”and“spalling”. Piting cracks initiate initiate at the surfacee and propagate at an acute angle to the surface under the action of alternating shear stress caused by contact and sliding forces,Then metal fragements are released from surface under the action of hydro- static pressure caused by the lubricating oil entered into the flaws. Spalling is be believed to be caused by alternating principal shear stress c(45)or orthogonal shear stressτ_(yz),both of which reach their maximum values in a plane slightly below the surface and can lead to plastic deformation and initiation of fatigue cracks in a susurface layery,With succeeding applicati- ons of load subsurface cracks propagate parallelly to the surface and,simultaneou- sly.some subsidiary cracks may appear at the surface whicn then propagate perpen- dicularly and link witk subsurface plastic zones or cracks.These main cracks spread further beneath and parallelly to the surface.Finally,the metal fragements flake off and spalls will form,In case-hardened parts,when the case depth is too thin and/or the core is too soft,spalling may occur at the case-core interface and is called“subcase spalling”.

    本文根据形貌、形成机制及防止措施的接触疲劳破坏分为“麻点”及“剥落”两类。麻点的初裂缝是在表面交变切应力的作用下从表面产生并倾斜发展,然后,在进入裂缝的润滑油所造成的压力作用下,金属小块从表面崩落。剥落是在交变的主切应力τyz(45°)或正交切应力τyz的作用下产生。两者都在次表层出现最大值,可使次表层的金属产生塑变或进一步形成裂缝,此后,次表层裂缝将平行于表面扩展;同时,从表面还会形成次生裂缝,其将垂直于表面扩展并与次表层的塑变区或裂缝连接。主裂缝继续平行于表面扩展,最后走出表面,使金属小块从表面剥落而形成小坑。对于表面硬化的零件,如其硬化层太薄或心部太软,则剥落可能沿过渡层产生,称为“硬化层剥落”。

     
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