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电弧重熔
相关语句
  arc remelting
     ARC REMELTING EXPERIMENTAL RESULTS AND ANALYSIS ON CuCr CONTACT MATERIAL
     CuCr触头材料电弧重熔实验结果及分析
短句来源
     The processing principle and the experiment system and results of arc remelting for the contact material of vacuum switches are described in this paper.
     本文介绍了真空开关触头材料电弧重熔工艺原理和电弧重熔系统及实验结果。
短句来源
     In present work the factors which effect on the decrease ductility and toughness of maraging steels were studied, the effects of vacuum induction melting together with vacuum arc remelting and electron-beam refining techniques on eliminating impurities in maraging steels were also studied.
     本文着重研究影响马氏体时效钢韧性与塑性下降的因素,也研究了真空感应冶炼、真空电弧重熔与电子束精炼工艺对排除马氏体时效钢中杂质的影响。
短句来源
     Arc remelting is an advanced processing to increase properties of contact material for vacuum switches,and the properties of contact are determined by arc contact material interaction in the process of arc remelting.
     电弧重熔法是提高真空开关触头材料性能的一种先进工艺方法 ,触头材料的性质决定于电弧与触头材料间的作用
短句来源
     Arc remelting experiment is performed to CuCr contact material manufactured by powdered metallurgy process. The experimental results are analyzed.
     对粉末冶金法制得的CuCr触头材料进行了电弧重熔实验 ,对实验结果进行了分析
短句来源
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  arc-remelting
     Research on Arc-Remelting System of the Contact Material of Vacuum Interrupters
     真空开关触头材料的电弧重熔研究
短句来源
     Effect of Arc on Contact Material in the Process of Arc-remelting
     电弧重熔过程中电弧对触头材料的作用
短句来源
  arc-remelting system
     Research on Arc-Remelting System of the Contact Material of Vacuum Interrupters
     真空开关触头材料的电弧重熔研究
短句来源
  “电弧重熔”译为未确定词的双语例句
     and the average oxygen content- 6×10-6 in the superalloy melted by VIM + ESR(Ar) was far lower than the average oxygen content- 13×10-6 in the superalloy melted by VIM (vacuum-induction melting) + VAR, therefore the deoxidizing effect of ESR(Ar) technology was better than that of VAR technology.
     VIM(真空感应熔炼 ) +ESR(Ar)工艺冶炼合金中平均氧含量 6× 10 - 6 远低于VIM +VAR(真空电弧重熔 )工艺冶炼合金中平均氧含量 13× 10 - 6 ,所以ESR(Ar)工艺脱氧效果优于VAR工艺
短句来源
     The remelting of consumable electrode and the Mg distribution in various zones at electrode tip during VAR process of a Ni-base superalloy Ni-10Cr-15Co-6W-6Mo-4Al-2Ti were studied.
     研究了镍基高温合金Ni-10Cr-15Co-6W-6Mo-4Al-2Ti真空电弧重熔过程中自耗电极熔化特征及电极端部不同区域内Mg的分布。
短句来源
     Effect of Arc Surface Remelting on the Corrosion Resistance of 0Cr19Ni9 TIG Welding Joint
     0Cr19Ni9TIG焊接接头的抗蚀性及电弧重熔
短句来源
     EVAPORATION BEHAVIOUR OF ELEMENTS DURINGVAR WITH LARGE SECTION CONSUMABLE ELECTRODE OF ALLOY A-286
     A-286大断面自耗电极真空电弧重熔过程中元素的挥发行为
短句来源
     Effect of Arc Surface Remelting on the Corrosion Resistanceof OCr19Nig SMAW Welding Joint
     0Cr19Ni9焊接接头电弧重熔及抗蚀性研究
短句来源
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  arc remelting
Calculation of the molten pool depth in vacuum arc remelting of alloy Vt3-1
      
This paper is devoted to a simple heat model of vacuum arc remelting (VAR) including the solution of a nonlinear heat conduction equation with nonlinear boundary conditions typical for VAR.
      
Quasi-steady-state characteristics of solidification of alloys made from VT3-1 alloy during vacuum arc remelting
      
vacuum arc remelting and protective gas electroslag remelting provides information on pool depth and shape, mushy zone width and temperature distribution in the steady state region of the process.
      
As part of a complete theoretical description of the behaviour of the electric arc in the vacuum arc remelting process, a model has been developed for the column of plasma generated by a single cluster of cathode spots.
      
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The remelting of consumable electrode and the Mg distribution in various zones at electrode tip during VAR process of a Ni-base superalloy Ni-10Cr-15Co-6W-6Mo-4Al-2Ti were studied. It was found that a remelted metal ring sticks to the electrode surface near tip. The Mg distributes in the metal ring rather homogeneously, but in remelted metal layer or in the liquid-solid binary phase zone heterogenously. The thickness of the remelted metal layer is varied with its position from electrode tip and averaged 1—1.5mm....

The remelting of consumable electrode and the Mg distribution in various zones at electrode tip during VAR process of a Ni-base superalloy Ni-10Cr-15Co-6W-6Mo-4Al-2Ti were studied. It was found that a remelted metal ring sticks to the electrode surface near tip. The Mg distributes in the metal ring rather homogeneously, but in remelted metal layer or in the liquid-solid binary phase zone heterogenously. The thickness of the remelted metal layer is varied with its position from electrode tip and averaged 1—1.5mm. The Mg content increased gradually with the increase of distance from the metal film/atmosphere interface via liquid/ solid binary phase zone to the unmelted electrode. The Mg concentra-tion either in the remelted metal ring, [Mg]_r, or in the outer layer of remelted liquid metal was less than that in the remelted ingot, [Mg]_i. Under present experimental conditions, [Mg]_(0.15)=0.18[Mg]_e=[Mg]_r; [Mg]_(0.40)=0.30[Mg]_e =[Mg]_i, where [Mg]_(0.15) and [Mg]_(0.40)=Mg concentration in the outer layer of remelted liquid metal at 0.15 and 0.40mm respectively; [Mg]_e and [Mg]_i=Mg concentration in electrode and in ingot respectively. It seems that the Mg is mainly evaporized in the droplet forming period during VAR process. The liquid metal flows round the surface of electrode tip and is unable to expose fully under vacuum. The process of Mg evaporation may be controlled by the transfer rate of Mg atoms from unmelted electrode into the liquid metal film/atmosphere interface. The coefficient of mass transfer K_(12)=0.107 cm·s~(-1). The Mg content in remelted ingot, [Mg]_i=[Mg]_e exp(-K_(12)Aγw~(-1). Thus, the optimum [Mg]_i can be realized by controlling [Mg]_e and the remelting rate w.

研究了镍基高温合金Ni-10Cr-15Co-6W-6Mo-4Al-2Ti真空电弧重熔过程中自耗电极熔化特征及电极端部不同区域内Mg的分布。发现在电极侧表面存在着一个重熔金属环,Mg在其中分布相当均匀,而在重熔金属液层及液固两相区内Mg分布则不均匀。金属液层厚度随其在电极端部所处位置而异,其平均值为1—1.5mm。分析结果指出,Mg含量从金属液层/气相界面经液固两相区至原始电极区即随距金属液层/气相界面距离δ_1增加而增加。重熔金属环中Mg含量[Mg]_r及熔化金属液外层(δ_1<0.40mm)中Mg含量均低于重熔锭中Mg含量[Mg]_i。在试验条件下,如自耗电极Mg含量以[Mg]_e代表,则[Mg]_(0.15)=0.18[Mg]_e=[Mg]_r;[Mg]_(0.40)=0.30[Mg]_e=[Mg]_i。真空电弧重熔过程中,Mg挥发主要发生于电极端部熔滴形成阶段,流经电极端面的金属液不能全部暴露于真空下,Mg挥发过程受控于Mg原子由原始电极区向金属液层/气相界面迁移的速度。传质系数K_(12)=0.107cm·s~(-1)。重熔锭中Mg含量[Mg]_i=[Mg]_e exp(-K_...

研究了镍基高温合金Ni-10Cr-15Co-6W-6Mo-4Al-2Ti真空电弧重熔过程中自耗电极熔化特征及电极端部不同区域内Mg的分布。发现在电极侧表面存在着一个重熔金属环,Mg在其中分布相当均匀,而在重熔金属液层及液固两相区内Mg分布则不均匀。金属液层厚度随其在电极端部所处位置而异,其平均值为1—1.5mm。分析结果指出,Mg含量从金属液层/气相界面经液固两相区至原始电极区即随距金属液层/气相界面距离δ_1增加而增加。重熔金属环中Mg含量[Mg]_r及熔化金属液外层(δ_1<0.40mm)中Mg含量均低于重熔锭中Mg含量[Mg]_i。在试验条件下,如自耗电极Mg含量以[Mg]_e代表,则[Mg]_(0.15)=0.18[Mg]_e=[Mg]_r;[Mg]_(0.40)=0.30[Mg]_e=[Mg]_i。真空电弧重熔过程中,Mg挥发主要发生于电极端部熔滴形成阶段,流经电极端面的金属液不能全部暴露于真空下,Mg挥发过程受控于Mg原子由原始电极区向金属液层/气相界面迁移的速度。传质系数K_(12)=0.107cm·s~(-1)。重熔锭中Mg含量[Mg]_i=[Mg]_e exp(-K_(12)·A·γ·W~(-1))。显然,可通过控制电极Mg含量[Mg]_e及熔化速率W来实现最佳Mg控制。

The ductility and toughness of maraging steels decreased with their strenth increase. In present work the factors which effect on the decrease ductility and toughness of maraging steels were studied, the effects of vacuum induction melting together with vacuum arc remelting and electron-beam refining techniques on eliminating impurities in maraging steels were also studied. The experimental results showed that interstitial elements such as C, S, N, O and other impurity elements have great influences on ductility...

The ductility and toughness of maraging steels decreased with their strenth increase. In present work the factors which effect on the decrease ductility and toughness of maraging steels were studied, the effects of vacuum induction melting together with vacuum arc remelting and electron-beam refining techniques on eliminating impurities in maraging steels were also studied. The experimental results showed that interstitial elements such as C, S, N, O and other impurity elements have great influences on ductility and toughness of maraging steels. The reduction of area and fracture toughness increase with decreasing the content of Ti (C, N) in maraging steels. The vacuum induction melting together with the vacuum are remelting is an effective method not only to control the chimical composition but also to remove the detrimental impurities in maraging steels. The electron-beam remelting technique is more effective than others for removing Antimony, Lead, Tin and other impurity elements, and also for reducing the carbon and oxygen contents in maraging steels. Therefore it increases the fracture toughness and ductility of maraging steels.

马氏体时效钢的韧性随其强度的提高而下降。本文着重研究影响马氏体时效钢韧性与塑性下降的因素,也研究了真空感应冶炼、真空电弧重熔与电子束精炼工艺对排除马氏体时效钢中杂质的影响。研究结果表明,间隙元素C、S、N、O与其它杂质元素对马氏体时效钢的韧性与塑性的影响很大。马氏体时效钢中Ti(C、N)含量的增加会降低其断裂韧性与面缩率。真空感应冶炼加真空电弧重熔不仅能准确地控制马氏体时效钢中的化学成分,还能有效地排除其中有害杂质元素。电子束重熔工艺能更有效地排除马氏体时效钢中锑、铅、锡及其它杂质元素,也能进一步脱除马氏体时效钢中的碳与氧含量,因此能提高马氏体时效钢的断裂韧性与塑性。

The rolling tearing is the important component for various machineries and a great variety of mechanical structures. Its typical types of failure are mainly as follows: wear, plastic identation, galling, heat imbalance and rolling contact fatique. And the life of rolling contact fatique is the substantial criterion of bearing quality, which is dependent on the metallurgical quality of bearing steel.

滚动轴承是重要的机械基础件,在所有的机械产品和工程结构中应用十分广泛,它的失效形式常见的有:磨损、塑性变形、擦伤、发热烧伤以及滚动接触疲劳等。但当轴承质量良好,而运行条件正常时,其最主要的失效形式是滚动接触疲劳,所以通常是以滚动轴承承受滚动接触疲劳的能力作为评定轴承质量的最主要指标,而钢材的冶金质量又是接触疲劳性能优劣的主要因素。近年来瑞典SKF公司从冶炼方法和冶炼技术着手,通过一系列试验研究,取得了很大成就,最后肯定了SKFMR(melting and refining)炼钢法能使钢的纯净度达到电渣重熔(ERS)或真空电弧重熔(VAR)的水平,目前该公司年产70多万吨轴承钢,全部采用这种冶炼方法生产。过去15~20年间,他们的滚动轴承钢的接触疲劳寿命成十倍地提高。笔者认为他们的经验值得借鉴,特择要介绍如下,意在“借他山之石以攻玉”,谨供参考!

 
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