电弧

"Modern furnaces range in heat size from a few tons up to 400 tons (360 metric tons), and the arcs strike directly into the metal bath from vertically positioned, graphite electrodes to remelt scrap steel or refine briquettes of direct-reduced iron ore."

现代电炉的装料量从数吨到400吨(360公吨)不等，而且电弧从垂直放置的石墨电极直接射入金属熔池。

During the interruptering circuit process of MCCB, two phenomena exist: electric arc back strike and arc restrike.

在塑壳断路器开断过程中存在着两种现象，电弧背后转移和过零重燃现象，这两种现象都影响着断路器的开断过程，并且都与灭弧室内电场分布有关。

In the paper, a back commutation mathematical model based on heat restrike is built according to the interrupting process. Solving differential equations for the mass, momentum and heat balance, the back commutation of low voltage current limiting circuit breaker is simulated.

根据实际开断物理过程，建立了以热击穿为主的背后击穿物理模型，运用气流场，结合热场、磁场与电流分布，计算模拟了低压限流断路器在开断过程中电弧运动状况与背后击穿现象。

Firstly, this paper introduced the basic concepts about interharmonic, including definitions, hazards and limited values. Then main interharmonic sources were shown, such as converter devices, inductive motors, arc furnaces, rolling mills and ripple control signals.

本文主要内容如下：(1)本文综述了对间谐波的认识，其中包括定义、危害和限值等，并结合实际经验，详细介绍了每一种间谐波源：变频装置、感应电机、电弧炉、轧钢机和音频控制信号。

TiN film is prepared by using multi-arc ion plating technique on the stainless steel substrate. The microhardness is measured by the Hv sclerometer.

采用电弧离子镀技术在不锈钢基片上沉积了TiN薄膜，利用显微硬度计测量了薄膜的表面硬度。

The microstructure of HVAS sprayed Al-bronze coatings and the morphology of the spray particles were investigated using Scanning Electron Microscopy and Optical Microscopy. The hardness and the adhesive strength of the coatings were measured using pull-off test and sclerometer, respectively.

摘 要：采用光学显微镜、电子扫描显微镜研究超音速电弧喷涂铝青铜涂层的显微组织结构及喷涂粒子状态；采用拉伸试验和硬度计分别测试了涂层的结合强度与硬度。

When the welding current is added, on the one hand,the section of arc will more or less increase, so the fusion width will increase; on the other hand, the depth of arc crater will increase.

焊接电流增加时，一方面是电弧截面略有增加，导致熔宽增加，另一方面是电流增加促使弧坑深度增加。

The effects of arc unstable, arc characteristics and commutating circuit parameters on the process of self-excited oscillation in current commutation are discussed in detail.

理论分析和模拟计算的结果说明了不同的开断装置电弧特性和转移回路参数对自激振荡过程的作用，为高压直流断路器转移回路的参数设计提供了有效的分析和计算工具。

The morphologies and microstructures of the cathode deposits prepared by self-sustained arc discharge between graphite rods under different conditions were investigated by means of SEM and TEM,and the relationship between the morphologies and microstructures of the carbon nanotubes and the different conditions of arc discharge was obtained.

通过实现不同条件下的电弧放电，用扫描电子显微镜和透射电子显微镜对阴极沉积物中碳管的形貌和微结构进行表征，得到碳管的形貌和微结构与放电条件之间的一些对应关系。

Both of the bare Nb silicide based alloy and coated sample were oxidized in an oxidizing furnace at 1250℃ for 5, 10, 20, 50 and 100h respectively.

电弧熔炼态试样和渗硅试样的氧化实验在高温拉伸氧化炉中进行，氧化温度为1250℃，氧化时间分别为5、10、20、50和100h。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。