Results 41 to 50 of about 1,631 (150)
, 1997 实验考察了在方截面结晶器内，由水口部位吹气形成的射流与气泡群混合的复杂流场中群水体的流态和气泡群运动特性，测定了气泡群直径，上升速度分布，气泡穿透深度以及气泡诱导水体运动的特性等；对气泡运动与水体中夹杂物去除的关系进行了初步探讨 ...
任敦长 +5 more
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Dianci bileiqi, 2012 金属氧化物避雷器（MOA）是电力系统中不可或缺的设备,为了保证电网的安全稳定运行,应定期对其进行预防性试验。避雷器试验结果准确与否,取决于多方面的因素。综述了表面泄漏电流、杂散电流、试验接线、限流电阻以及其他设备对MOA停电直流高压试验的影响,有针对性的提出了解决方案:1.通过加装屏蔽环和使用绝缘带包缠的方式消除表面泄漏电流和杂散电流的影响;2.根据现场的试验接线存在的问题,提出了改进后的接线方式;3.给出去除限流电阻影响的近似计算方法;4.通过将屏蔽线屏蔽层小线夹接地的方式消除电容 ...
吴德贯, 刘凡栋, 梁华洋
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Formation mechanism of internal cracks in continuous casting slabs with soft reduction [PDF]
, 2016 The crack morphology and element segregation in continuous casting slabs were studied to solve the problem of internal cracks. The stress of the solidification front was analyzed by a finite element model at a series of reduction parameters and compared ...
SONG Wei +4 more
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Physical Simulation of Inclusion Removal and Slag Entrapment in 210 t RH Refining Process
Teshugang, 2011 Effect of steel works 210 t RH refining treatment time, driving gas flow rate, vacuum, number of stomata and immersion depth on inclusion removal and the effect of bottom-blowing pattern and gas flow rate on amount of slag entrapment have been studied by
迟云广 +4 more
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Research progress on the control of reactive elements in remelted ingots during the electroslag remelting process [PDF]
Electroslag remelting (ESR) is an important secondary refining technique that effectively removes impurities and nonmetallic inclusions, improves the solidification structure of ingots, and enhances the mechanical properties of steels.
Lifeng ZHANG, Shengchao DUAN
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Control of Inclusion Transformation in Steelmaking Process of Tyre Cord Steel
Teshugang, 2012 The studied steelmaking flow sheet for tyre cord steel is 150 t LD-RH-LF-soft argon blowing-CC process. The plasticity of non-metallic inclusions in steel is controlled by adding deoxidation reagent Si-Mn during LD tapping and adding low basicity top ...
陈书浩 +5 more
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高强钢超高周疲劳寿命预测模型和P-S-N曲线快速估计 [PDF]
, 2016 高强钢的超高周疲劳裂纹通常起源于材料内部的夹杂物等缺陷处,并且疲劳断口具有典型的"鱼眼"和"暗区"形貌。大量研究表明,暗区内等效裂纹萌生速率远低于一个晶格尺度,并且暗区的形成消耗的寿命占总寿命95%以上。本文将裂纹源区夹杂物等缺陷等效成钱币型裂纹,从裂纹尖端塑性区尺寸和等效裂纹萌生速率的关系角度出发,提出一种考虑夹杂物尺度和暗区尺度影响的高强钢超高周疲劳寿命预测模型,即N=α~(-1)(σ_α/σ_Y)~(-1)ln(α_(FGA)/α_(ln)),α_(FGA)=(area_(FGA))～(1/2 ...
孙成奇, 洪友士
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Coupling numerical simulation of flow field,temperature field and stress field in a wide-thick slab continuous casting mold [PDF]
, 2016 Based on a moving boundary approach, a three-dimensional dynamic model is built for 2400 mm ~400 mm wide-thick slab molds by using ProCAST to realize the coupling simulation of flow field, temperature field and stress field.
CHEN Ping-hu +3 more
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A Study on Water Simulation for Optimizing Tundish Structure and Inclusion Removal in Concasting
Teshugang, 2009 According to prototype 25 t tundish, the liquid flow field and the removal of inclusions in an approximate rf-shape tundish with three kind卜 of weirs in 4-strarid easting have been analyzed by using experimental similarity ratio λ= 1 ： 2. 3 uatrr model.
高锦国 +3 more
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