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its hardness
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  材质硬度
     Investigations have been made on the topographical and tribological feature of compacted ZG310-570 steel in rolling against ZG31Mn2Si steel at different loads and its hardness.
     考察了ZG310-570/ZG31Mn2Si摩擦副条件下,外加载荷、材质硬度对ZG310-570滚动磨损特性的影响。
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  “its hardness”译为未确定词的双语例句
     Aging Procedure and Its Hardness Change from Singleβ-Ti Phase to α+Ti2Co Dual Phase of Alloy Ti-12Co-5Al
     Ti-12Co-5Al合金的β相α+Ti_2Co时效相变与硬度
短句来源
     Its hardness is 5.5-6.5.Its density was determined to be(2.47)g/cm~3 by using a buoyancy method.
     测得莫氏硬度为5.5~6.5,用浮力法测得其密度为2.47g/cm3;
短句来源
     Its hardness is 63~65 HRC,its impact toughness is over 14 J/cm~2,its hardness balance on the roll surface is smaller than 2 HRC.
     高速钢轧辊硬度达63~65 HRC,辊面硬度差小于2 HRC,冲击韧度大于14 J/cm2。
短句来源
     Its hardness is 63-65 HRC, its impact toughness is over 14J/cm2, its hardness balance on the roll surface is smaller than 2 HRC.
     高速钢轧辊硬度达63-65HRC,辊面硬度差小于2HRC,冲击韧性大于14J/cm2。
     After specimen being sintered and quenched, its hardness is HRC60~65, D: about 95%, σb: 430~460MPa, δ: 0. 35~0. 85 %, wear resistance is 6. 6 times more than 60 steel which is quenched and tempered in low temperature.
     试样经烧结并淬火处理,其硬度达HRC60~65,相对密度D为95%左右,抗拉强度σb为430~460MPa,延伸率δ为0.35%~0.85%,耐磨性能比60钢(经淬火并低温回火)高6.6倍。
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  相似匹配句对
     hardness was HB;
     硬度HB;
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     hardness 5;
     硬度为5;
短句来源
     Ultrasonic Hardness Tester and Its Evolution
     超声硬度计原理及其发展
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     Studies on Wheat Hardness and Its Testing
     小麦硬度及其测定
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  its hardness
The thickness of the coating obtained by threefold spray was about 50 μm and its hardness value was about 30.7±4.5 GPa.
      
The dense coating was free of porosity, and its hardness increased after heat treatment with Mn alloys, compared with assprayed ZrO2 coating.
      
It was found that material of reduced ability to work hardening could not achieve optional resistance to cavitation, regardless of its hardness.
      
In this study, tungsten carbide, with its hardness, chemical inertness, thermal stability and low resistivity (25 μΩ cm)1 is shown as a reliable contact material to n- and p-type 6H-SiC for very high temperature applications.
      
The HAZ cracking increased as the weld metal lattice mismatch between γ' precipitates and γ matrix of the weld and its hardness (Ti + Al) increased.
      
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The river Hutouho and the river Fuyangho are two great rivers east of mountain Taihangshen, North China. The Lower reaches of the river Hutouho have stronger alluvial fan and the river Fuyangho flows along the fringe of the alluvial fan. The hydrochemical characteristics of these rivers are different fron. each other in a marked manner owing to its difference of chemical properties of surtace of earth, microrelief and hydrogeological conditions. Chemical composition and ion contents of water solution of the...

The river Hutouho and the river Fuyangho are two great rivers east of mountain Taihangshen, North China. The Lower reaches of the river Hutouho have stronger alluvial fan and the river Fuyangho flows along the fringe of the alluvial fan. The hydrochemical characteristics of these rivers are different fron. each other in a marked manner owing to its difference of chemical properties of surtace of earth, microrelief and hydrogeological conditions. Chemical composition and ion contents of water solution of the river Fuyangho whether in spacial distribution, or in variation with time are extremely stuble. Its degree of mineralization is about 300.00~(n·g·)/l., and its hardness fron 3.00 ~(n·e·)/l. to 4.00~(n·e·)/l. to which C_Ⅱ~(Ca) hydrochemical type, sometimes,——C_Ⅰ~(Ca) hydrochemical type are usually beloged. The typical hydrochemical phase of forest-steppe zone is found in whole river, i.e., HCO_3~-=SO_~-—Ca~# hydvochemical phase and HCO_3~-—Ca~#—SO_4~-hydrochemical phase. Chemical composition and ion contents of the river Fuyangho are qutie unstable. Since its upper reaches may obtain plenty of deep-artesian water and ground water that flows out of the fringe of the alluvial fan, thereby its degree of mineralization is over 500.00~(n·g·)/l., and its hardness from 5.00~(n·e·)/l. to 8.00~(n·e·)/l. sulphate water or multiple carbonate water resides in its upper reaches, the secondary-type of sodium-group of sulphate-water-class resides always in the middle of the river. At its lower reaches almost each of all class, group and type appears. On the other hand, chemical denudation and chemical accumulation differ from each other. The river that flows on the alluvial fan and the river that flows along the fringe of alluvial fan imerge almost in pair. The river Hutouho and the river Fuyangho are regarded as a typical instance. Thus, comparative study of this situation of hydro chemical characteristics of these rivers would be helpful to understand the hydrochemical characteristics for others with the same structure of river net.

滹沱河与滏阳河是华北太行山东麓的两条河流。滹沱河有发达的冲积扇,而滏阳河则是沿着它的冲积扇边緣发育的。由于两河在流經地区的地表化学性質、微地貌和水文地质条件上的不同,致使两河河水在化学特点上呈現显著的差異。滹沱河河水的化学組成和离子含量在时間上和空間上都显得极为稳定,其矿化度在300毫克/升左右,一般界于200—400毫克/升之間,硬度3—4毫克当量/升,通常为C_Ⅰ~(Ca)型水,次为C_Ⅰ~(Ca)型水。具有典型的森林草原地带的水化学相,即HCO_3-SO_4—Ca水化学相和HCO_2—Ca—SO_4水化学相。滏阳河河水的化学組成和离子含量,无論是在空間上,还是在时間上都显現出极为复杂的变異性。因为在上游有丰富的深层地下水补給,在中下游又不断得到滹沱河冲积扇边緣潜水的滋注,故矿化度一般高于500毫克/升,但經常可变动于400—1000毫克/升之間。硬度5—8毫克当量/升。水化学类型在上游从硫酸水类变化到重碳酸水类,中游較为稳定,属硫酸水类,并通常表現为鈉組、Ⅱ型。下游則可出現硫酸水类、重碳酸水类到氯水类的各个組到各个型的水。但整个河流主要的还是硫酸水类的鈉組、鎂組中的Ⅱ、Ⅲ型水。中游为HCO_3—SO_4...

滹沱河与滏阳河是华北太行山东麓的两条河流。滹沱河有发达的冲积扇,而滏阳河则是沿着它的冲积扇边緣发育的。由于两河在流經地区的地表化学性質、微地貌和水文地质条件上的不同,致使两河河水在化学特点上呈現显著的差異。滹沱河河水的化学組成和离子含量在时間上和空間上都显得极为稳定,其矿化度在300毫克/升左右,一般界于200—400毫克/升之間,硬度3—4毫克当量/升,通常为C_Ⅰ~(Ca)型水,次为C_Ⅰ~(Ca)型水。具有典型的森林草原地带的水化学相,即HCO_3-SO_4—Ca水化学相和HCO_2—Ca—SO_4水化学相。滏阳河河水的化学組成和离子含量,无論是在空間上,还是在时間上都显現出极为复杂的变異性。因为在上游有丰富的深层地下水补給,在中下游又不断得到滹沱河冲积扇边緣潜水的滋注,故矿化度一般高于500毫克/升,但經常可变动于400—1000毫克/升之間。硬度5—8毫克当量/升。水化学类型在上游从硫酸水类变化到重碳酸水类,中游較为稳定,属硫酸水类,并通常表現为鈉組、Ⅱ型。下游則可出現硫酸水类、重碳酸水类到氯水类的各个組到各个型的水。但整个河流主要的还是硫酸水类的鈉組、鎂組中的Ⅱ、Ⅲ型水。中游为HCO_3—SO_4—Na水化学相到SO_4—HCO_3—Na水化学相。上游和下游全无恒定的水化学相。此外,它們在化学剥蝕作用与化学堆积作用上也是不同的。冲积扇上河流与扇緣河流在华北往往是經常成对出現的,上述两河可以作为这种情况的典型代表。所以該两河水化学特点的对比研究,将有助于认識其他具有相同結构的河流水化学性質。

In this paper, testing results on the tin-alloyed cast iron cylinder-blocks for trucks are presented. The results obtained in the laboratory and in the mass production indicate that addition 0.05% Sn to melted iron HT20-40 containing 0.25-0.35% Cr can increase quantity of pearlite which occurs at the interior wall of the cylinder-blocks over 90%; its hardness is considerablly increased; undercooled layer is decreased; sensibility of the cross-section is decreased; permitted range of the chemical composition...

In this paper, testing results on the tin-alloyed cast iron cylinder-blocks for trucks are presented. The results obtained in the laboratory and in the mass production indicate that addition 0.05% Sn to melted iron HT20-40 containing 0.25-0.35% Cr can increase quantity of pearlite which occurs at the interior wall of the cylinder-blocks over 90%; its hardness is considerablly increased; undercooled layer is decreased; sensibility of the cross-section is decreased; permitted range of the chemical composition is increased; soundness and anticorrosion is inproved too; and at the same time, the technique of mechanical cutting is satisfied. Therefore, tin-alloyed cast iron for cylinder-blocks surely has long-live service. Inoculated iron by addition Sn is discussed in detail. According to the refinement of eutectic cells, improvement of sensibility of the cross-section, decreasing tendency to chilling, decreasing the amount of undercooled graphite and increasing mechanical properties, in comparision with the iron no added with Sn, it indicates that Sn can inoculate melted iron. Besides, The formation of the undercooled layer in the cylinder-blocks and the effect on the layer by the addition of Sn have been explained.

本文报导了加锡铸铁制作汽缸体的试验工作。实验室工作和生产试验表明,在原有HT20-40牌号含铬的铁水中,附加 0.05%的锡,可使汽缸体缸筒内壁的珠光体数量提高到90%以上,硬度有明显的提高,过冷层厚度减少,并且减少了汽缸体的断面敏感性,扩大了允许的化学成分范围,致密度和耐腐蚀性能也有所改善;同时也能满足机械加工的工艺要求。从而,可以显著地提高汽缸体的使用寿命。 文中指出,加锡对铸铁有孕育作用。从细化共晶团、改善断面均匀性、减少白口倾向、减少过冷石墨和提高机械性能几方面,与不加锡的铸铁进行对比,论证了锡的孕育作用。此外,还对汽缸体过冷层的形成以及加锡可使其减少的原因进行了探讨。

A brief Iiteraturc review about the results of wear tests of wheels and rails with defferent hardness in the past decade is presented in this paper.It presents the results of wear tests of wheels on six rails with different hardness. Wear tests of rolling-sliding contact were carried out with the Amsler machine in dry condition. The coefficients of friction were calculated. Cross sections and worn surfaces of wheel and rail specimens under tests were observed by optical microscope and SEM. The composition of...

A brief Iiteraturc review about the results of wear tests of wheels and rails with defferent hardness in the past decade is presented in this paper.It presents the results of wear tests of wheels on six rails with different hardness. Wear tests of rolling-sliding contact were carried out with the Amsler machine in dry condition. The coefficients of friction were calculated. Cross sections and worn surfaces of wheel and rail specimens under tests were observed by optical microscope and SEM. The composition of wear debris was analysed by x-ray diffraction. SEM photograph shows that the wear debris are of thin sheets, arid formed by nucleation and propagation of surface and subsurface cracks. Besldes, the wear rates of differently heat-treated rails are compared and the test results of contact fatigue are derived. From the measurement of micro-hardness and SEM observation it shows that the harder the metal, the shallower the work-hardened layer, then the finer the wear debris will be. In the tested range of hardness, the wear rate of wheel decreases with the increase of its hardness, but the wear rate of rail is apparently increased. The wear rate of wheel is increased as the hardness of the rail increases. The wear rate of wheel will be decreased effecfively when it possesses hardness of H_B 295-310, so that it will not then be embrittled,

本文首先对近十年来不同硬度车轮及钢轨的磨损试验文献作了简短的回顾。 本文报道了六种钢轨和不同硬度车轮样品的磨损试验结果。试验是在M—200试验机上进行的。磨损方式是滚动滑动干磨损。试验中测定了磨擦系数,对轮轨样品截面及磨损面作了光学显微镜及扫描电镜检查。磨屑进行了x光衍射分析及扫描电镜观察,磨屑是片状,由表面及亚表面裂纹的产生及扩展而形成。还进行了不同热处理钢轨耐磨性的比较及接触疲劳试验。 从显微硬度测定及扫描电镜观察表明,硬度高,加工硬化层浅,形成的磨屑小。在所试验的硬度范围内,提高车轮的硬度,其磨损减少,而钢轨的磨损有所增加。增加钢轨的硬度,车轮的磨损增加。采取车轮的硬度为HB295~310能有效地减少车轮的磨损,同时不致使车轮发脆。

 
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