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secondary cooling
相关语句
  二次冷却
     Optimization of Secondary Cooling Process for 150 mm×150 mm Billet Concasting
     150 mm×150 mm方坯连铸二次冷却工艺的优化
短句来源
     Secondary cooling water auto-control of 220×1600mm slab con-caster of JISCO
     酒钢220mm×1600mm板坯连铸机二次冷却自动配水控制
     Research on the secondary cooling of billet continuous casting of steel SWRH82B
     SWRH82B方坯连铸的二次冷却研究
短句来源
     Process Optimization for Secondary Cooling of R9m Billet CC
     R9m方坯连铸二次冷却工艺的优化
短句来源
     THE DESIGN OF SECONDARY COOLING AREA OF R6m CONTINUOUS CASTING MACHINE
     R6m连铸机二次冷却区设计
短句来源
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  二冷
     Secondary Cooling Technology for High-Efficiency Concasting of 150 mm×150 mm Billet
     150mm×150mm方坯连铸高效化的二冷技术
短句来源
     Optimization of Concasting Secondary Cooling Process for Φ450 mm Tube Bloom of Steel 15CrMoG
     15CrMoG钢Φ450mm管坯连铸二冷工艺的优化
短句来源
     Characteristics of Cooling of Nozzles for Secondary Cooling of 360mm×450mm Billet Concaster
     360mm×450mm方坯连铸机二冷区喷嘴的冷却特性
短句来源
     The new secondary cooling model of spraying water for relation between each section water amount Qi (L/min) in secondary cooling zone with molten steel overheating temperature ΔT (℃) and csting speed V (m/min) is established: Qi = a+bv+cv2+d(ΔT-30)+F, where a, b, c, d and F are constant.
     提出二冷段各段水量Qi(L min)与钢液过热度ΔT(℃ )和拉速V(m min)关系的新的二冷水模型 :Qi=a +bv +cv2 +d(ΔT - 30 ) +F ,其中a、b、c、d和F为常数。
短句来源
     The curved concasting secondary cooling process model for Φ450 mm tube bloom of steel 15CrMoG - 0.12~0.18C, 0.80~1.10Cr, 0.40~0.55Mo has been established to optimize the concasting secondary cooling process.
     建立了 15CrMoG钢 (% :0 12~ 0 18C ,0 80~ 1 10Cr,0 4 0~ 0 5 5Mo)弧形连铸Φ4 5 0mm圆管坯的二冷工艺模型以优化连铸二冷工艺。
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  “secondary cooling”译为未确定词的双语例句
     A new secondary cooling model of spraying water that is a new formula Qi=a + bv + cv2+ d(ΔT-30) + F is developed.
     提出了新的二冷水模型,即Qi=a+bv+cv2+d(ΔT-30)+F;
     The effect of water ratio in secondary cooling zone on billet cooling speed, solidification structure and center carbon segregation index of 0.64% - 0.82%C steel 150 mm×150 mm billet casting with 250A/5Hz electromagnetic stirring has been tested.
     试验了250A/5Hz电磁搅拌连铸150 mm×150 mm方坯时二冷比水量对0.64%-0.82%C钢铸坯冷却速度、凝固组织和中心碳偏析的影响。
短句来源
     While a flux containing high fluorine was used, the increased F- concentration in the secondary cooling water reached at 24.3~57.9mg/L, and the water behaved in acidity.
     使用高氟保护渣,二冷水中F-浓度增幅为24.3~57.9 mg/L,水样呈酸性。
短句来源
     Dynamic secondary cooling model——DYNACS for continuous casting
     连铸DYNACS动态二冷水模型
短句来源
     Dynamic Secondary Cooling Model of DYNACS for Continuous Casting
     连铸DYNACS动态二冷水模型
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  secondary cooling
The validation trials involved a wide range of low- and medium-carbon steel grades, casting speeds, slab widths, and secondary cooling strategies.
      
The predicted slab surface temperatures show very good agreement with corresponding measured values taken in plant tests at several locations along and across the secondary cooling system.
      
This article reports on an extensive experimental and modeling study undertaken to elucidate the thermal evolution of thin slabs during their passage through the mold and secondary cooling system of a compact-strip process (CSP) caster.
      
In addition, a secondary cooling algorithm accounts for water ejection, which can occur at low water flow rates (low heat-extraction rates).
      
The algorithm used to account for secondary cooling to the water includes boiling curves that are a function of ingot-surface temperature, water flow rate, impingement-point temperature, and position relative to the point of water impingement.
      
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A one dimensional heat transfer mathematical modeI has been deveIoped for continuous cast steel slabs based on Mizikar's propositions. Results have been obtained from an analysis of technological parameters by using the computer simulating technique. If we kccp the quantities of heat extraction in each section of the secondary cooling zone constant, the water flow in the i—th section Wi may be expressed as follows: W_i=S_i(A_i+B_iv)~α where S—section area, A, B—constants, v—casting speed, α—nozzle parameter...

A one dimensional heat transfer mathematical modeI has been deveIoped for continuous cast steel slabs based on Mizikar's propositions. Results have been obtained from an analysis of technological parameters by using the computer simulating technique. If we kccp the quantities of heat extraction in each section of the secondary cooling zone constant, the water flow in the i—th section Wi may be expressed as follows: W_i=S_i(A_i+B_iv)~α where S—section area, A, B—constants, v—casting speed, α—nozzle parameter and i—index of the section.

根据Mizikar原理,发展了一种板坯连铸的一维热传输数学模型.应用计算机模拟技术分析工艺参数的结果说明:如果将二次冷却区的每一截面抽取的热量保持常数,则二次冷却区第i段的水流量W_i可以下式表示:W_i=S_i(A_i+B_iV)~as——截面积;A,B——常数;V——浇铸速度;a——水口参数;i——段标记武钢连铸机原来的操作,二次冷却水的控制是建立在静态热平衡基础上的.当有必要改变浇铸速度时,它不能满足表面温度保持不变的要求.新的方法得以改善雾化冷却的控制,从工厂的生产实践证明是令人满意的.

On the basis of the theory about strand bulgging, some important investigations including solidification, casting speed, casting temperature and secondary cooling etc. for continuous casting of orientated siticon steel have been carried out, and a complete operating regulation, i.e. "Low Temperature, High Speed, Middle Cooling" has been therefore established. Practice in the production has proved that the continuous casting technique for orientated silicon steel can meet production efficiency and...

On the basis of the theory about strand bulgging, some important investigations including solidification, casting speed, casting temperature and secondary cooling etc. for continuous casting of orientated siticon steel have been carried out, and a complete operating regulation, i.e. "Low Temperature, High Speed, Middle Cooling" has been therefore established. Practice in the production has proved that the continuous casting technique for orientated silicon steel can meet production efficiency and quality requirement.

以板坯鼓肚理论为基础,对硅钢连铸的几个重要方面,包括凝固,铸速,铸温,二次冷却等进行了试验与研究,从而建立一套完整的“低温—快注—中庸冷却”的取向硅钢连铸工艺方法。生产实践证明,这是一项能满足生产效率和质量要求的连铸技术。

The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface...

The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface was enlarged. If this separated part of skin can keep close back to the mold as soon as possible, the difference of cooling rate in slab surface may be reduced, then no crack appears. Control of the primary cooling water can make the slow cooling zone small and also the tensile strain small, hence the cracking may be avoided.The stress required for producing internal crack decreases since there are loci of cracks in the slab caused by the surface crack, so the longitudinal cracks from inner to surface form easily. The extremely large temperature difference between the skin surface and inner layer caused by direct secondary cooling water generates very severe thermal stress, in tnis case the internal cracks form more ceasily. This thermal stress in the thinner part of skin appears more severe, therefore increasing the atomization covering area of the nozzle is an effective measure for avoiding internal cracks.

试验结果得知,坯壳在结晶器内冷却不均,使坯壳凝固层厚薄不同,是铸坯产生表面裂纹的主要原因。结晶器内,熔融的保护渣层分布不均,使铸坯表面热传导有所差异,而引起铸坯表面冷却不均,使局部坯壳首先脱离结晶器壁。结果更扩大了铸坯表面冷却速度差异的程度。坯壳局部区域脱离结晶器壁后,若能及时复贴结晶器壁,可改善铸坯表面冷却不均的现象,从而避免裂纹的出现。控制—冷区用水量以达到缓冷,使凝固缓慢区变小,拉伸应变也随之而小,亦可避免裂纹产生。由于铸坯表面裂纹形成的裂纹灶,降低了产生内裂所需要的应力值,易于形成内、外相连的纵裂。同时二次冷却水对刚出结晶器的铸坯进行直接冷却,坯壳表面温度急速下降,致使坯壳内层遭受到很大的热应力,易于引起坯壳产生内裂。这种热应力在坯壳较薄处更为明显。因而增加喷嘴雾化复盖面;对减少内裂是有效的措施。

 
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