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property
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  性能
    Microstructure and Property of eutectic superalloy directionally solidified under high temperature gradient
    高梯度定向凝固共晶高温合金的组织与性能
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    Study of Technique Optimization and Structure Property of Electromagnetic Continuous Casting
    电磁连续铸造过程工艺优化及组织性能研究
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    Study on Development and Cutting Performance of High Mechanical Property Cermet Tool Materials
    高性能金属陶瓷刀具材料的研制及其切削性能研究
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    Multi-Scale Calculation and Simulation of the Microstructure, Phase Transition and Property in Metallic Alloys
    金属合金微结构、相变及性能的多尺度计算与模拟
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    Study on structure and property of laser hardening of carbon steels
    碳素钢激光淬火组织性能的研究
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    Research on the Microstructure and Mechanical Property of Metallic Silicide in Mo-Si System
    Mo-Si系金属硅化物组织与机械性能的研究
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    The structure and the property of wear resistance of a high chromium cast alloy
    高铬耐磨铸造合金的组织及其磨损
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    Study on the Microstructure and Corrosion Resistant Property of High-silicon Cast Iron
    高硅铸铁的组织及其耐蚀性的研究
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    ISO machnical property symbolisms
    国际标准(ISO)材料机械性能表示法
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    NONLINEAR EQUATIONS FOR CALCULATING HARDENABILITY AND MECHANICAL PROPERTY
    计算淬透性及机械性能的非线性方程
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  property
The application arises because of a very strong homological property enjoyed by certain cell filtrations forq-permutation modules.
      
The Direct Summand Property in Modular Invariant Theory
      
Finite complex reflection groups have the remarkable property that the character field k of their reflection representation is a splitting field, that is, every irreducible complex representation can be realized over k.
      
The proof involves showing that a nonsymmetric version of the relevant integral is annihilated by a suitable ideal of the affine Hecke algebra, and that any such annihilated functional satisfies the desired vanishing property.
      
On Orthogonal Wavelets with the Oversampling Property
      
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The possibility of the development of Fe-Mn-Al austenitic steels has been investigated with special attention paid to the effect of Mo, W, Ti, V, Cr or Si on the stability of austenite, their high-temperature strength and tonghness, as well as their resistance to oxidation and corrosion.It was found that two alloys have good tensile and stress-rupture properties comparable to those of high Cr-Ni bearing steels such as 257 Ti and one alloy has oxidation resisting property similar to that of 13% Cr steel....

The possibility of the development of Fe-Mn-Al austenitic steels has been investigated with special attention paid to the effect of Mo, W, Ti, V, Cr or Si on the stability of austenite, their high-temperature strength and tonghness, as well as their resistance to oxidation and corrosion.It was found that two alloys have good tensile and stress-rupture properties comparable to those of high Cr-Ni bearing steels such as 257 Ti and one alloy has oxidation resisting property similar to that of 13% Cr steel. However, their corrosion resistance is rather poor and this seems to be the main objection for them to be used as high-temperature steels. Cladding and surface coating are suggested as possible remedies.Some of the alloys have low magnetic permeability and high impact values at-178℃, thus enabling them to be considered as potential non-magnetic and low-temperature steels.

配制了30个不同成分的鋼种,对Fe-Mn-Al系奥氏体鋼,进行了成分、組織結构、性能方面的研究。在研究的成分范围內,找出了奥氏体区与成分的經驗关系;观察了成分及組織結构对高低溫瞬时力学性能、持久强度、时效性能、抗氧化性能等的影响;得到了在650℃持久强度相当于257T的实驗鋼种,并初步确定了在Fe-Mn-Al系中发展出耐热鋼种的最可能成分范围。指出了在实驗鋼种A2的基础上,发展出无磁钢及低溫鋼的可能性。

Specimens of A-cast high-C high-Cr tool steel were compressed along two perpendicular directions. Result of metallographic examination shows that there are two aspects to the breakdown of eutectic carbide structure: scattering of eutectic carbide network and breaking down of carbide particles. To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed. When the specimen is alternately deformed along two perpendicular directions, carbide particles...

Specimens of A-cast high-C high-Cr tool steel were compressed along two perpendicular directions. Result of metallographic examination shows that there are two aspects to the breakdown of eutectic carbide structure: scattering of eutectic carbide network and breaking down of carbide particles. To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed. When the specimen is alternately deformed along two perpendicular directions, carbide particles are smaller and more evenly distributed. Small ingots were drawn out into billets with various operations. The result shows that when cross sectional area of the ingot is reduced to one-tenth, eutectic carbide network beging to scatter. When cross-sectional area is reduced to one four teenth, carbide particles distribute somewhat like bands. When ingots were drawn out with flattening of breadth and height ratio more than 2 and flattening alternately on two perpendicular sides more than 3 times, the breakdown of eutectic carbide structure is more complete than that without flattening, especially in the central part.' Meanwhile there appears no band structure when ratio of reduction area is large. When ingot is upset at first, then drawn out with flattening, it is the most effective forging process to break down eutectic carbide structure. Result of impact testing with circular-arc notch shows that impact value of forged billet is closely related to the stages of breakdown of eutectic carbide structure. Hence it is suitable for evaluating the mechanical property of tool steels.

将铸态高铬模具钢试样经不同方向的反复变形试验后,结果表明共晶炭化物组织的破碎过程包括网状组织的分散和片状炭化物颗粒的折断两个方面。当铸志晶粒度力4~5级寸,破碎晶炭化物组织需要有60%以上的拉应变。不同方向的反复变形使网状组织分散得更好,炭化物颗粒断裂得更细小。 用不同方法将高铭模具钢小钢锭锻成钢材的试验指出,当锻比大于10时,网状共晶炭化物组织已经破碎,锻比大于14,会出现带状分布。采用走扁方的引伸,如扁方度大于2,不同方向的走扁方次数在三次以上时,和不走扁方的一般引伸方法比较,钢材达到同样的共晶炭化物破碎程度时锻比可以小些,中心部位破碎得较好。同时当锻比较大时,不出现带状组织。如将钢锭先经过墩粗,压下量大于50%,然后再用走扁方引伸成钢材,这是破碎共晶炭化物组织最有效的锻造方法。 用带圆弧缺口的冲击试验结果表明冲击值和钢材的共晶炭化物组织破碎程度有密切关系,可以作为性能指标。

On the basis of the property of the polyalkylene glycol, the paper gives a brief analysis of the superiority of matals as demonstrated in the cooling mechanism during the quenching process. Results of some of the tests of quenching distortion on stsel parts are presented; and effects in production are also given. In addition, some ideas and suggestions are put up for the management of using polyalkylene glycol as quenchant.

本文根据聚醚特性,简要地分析了金属在淬火过程中冷却机理所显示出的优越性。给出了部分钢铁零件淬火变形和开裂试验以及生产应用效果。对使用聚醚淬火介质管理的若干问题,提出了具体的看法和措施。

 
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