应用电极涂层工艺生产1Cr12NiW1Mo1V电渣重熔钢

大冶特钢公司应用电极涂层的工艺方法，使碳或硅，锰成分偏低的电有材料在电渣重熔过程中减少这些元素的烧损，甚至提高含量，从而生产出成分完全合格的电渣重熔钢。应用于１Ｃｒ１２Ｎｉ２Ｗ１Ｍｏ１Ｖ耐热钢生产取得了良好的结果。     

28.4t 1Mn18Cr18N护环电渣锭生产

根据1Mn18Cr18N钢特点,通过精心制备电极及控制电渣重熔过程,成功生产了重达28.4 t的护环电渣锭。电渣锭表面质量优良,底部成型良好,顶部补缩密实平整。     

一种生产同材质电渣引锭板的模具设计探讨

根据大型真空感应熔炼炉生产中所用锭模的相关特性及电渣重熔工序对引锭板的要求,设计出一种模具及耐材,可在浇注真空电极棒的同时,浇注出符合电渣重熔相关要求的电渣引锭板。实践表明:用此方法设计出的模具与耐材生产的引锭板表面光整,成分与真空锭一致,符合电渣重熔过程的使用要求;同时省时省力,避免了电渣重熔后电渣锭底部切除过多的问题,降低了生产成本。     

电渣重熔生产30CrMnSiNi2A航空锻件用钢的探索

使用传统工艺"EBT电炉+LF+VD+VC+锻造"生产的30CrMnSiNi2A航空锻件常出现点状偏析和力学性能不稳定的现象。使用电渣重熔工艺对该锻件进行了研究,探讨了自耗电极和电渣锭成分的均匀性和气体含量以及电渣重熔过程元素的烧损情况,并对锻件的低倍组织和力学性能进行了分析。结果表明,电渣锭成分均匀性好于双真空工艺自耗电极的成分均匀性,电渣重熔过程元素烧损较小,锻件低倍组织无点状偏析,力学性能各项指标达到技术要求。     

大型板坯电渣重熔结晶器的设计及优化

板坯电渣重熔是获得高质量大单重、特厚板的先进方法，其中板坯结晶器是电渣重熔技术的核心和关键。结合产品实际需求，在数值模拟的基础上，对40 t大型电渣板坯结晶器进行了设计与优化。实践表明，固定式结晶器具备良好的导热性，成型质量好，寿命高；结合单相单电极同轴导电的结构设计，生产的大型电渣板坯成分均匀、组织致密，完全满足质量要求。该关键技术具有完全的自主知识产权，可推广使用。     

0Cr18Ni10Ti钢电渣工艺探讨

介绍了 0Cr1 8Ni1 0Ti钢的电渣重熔生产过程。通过采用在自耗电极的表面涂石灰浆、采用五元渣系和氩气保护以及在重熔过程中加入Al粉等措施有效地防止了 [Ti]在电渣重熔过程中的烧损。     

用模铸八角锭作为自耗电极生产H13钢电渣重熔锭

通过调整电渣重熔时的冶炼工艺参数,直接以截面差异较大的5.0 t模铸八角锭作为电渣重熔用自耗电极,生产出了质量优良的H13钢电渣重熔锭。该工艺可降低生产成本、缩短生产周期。     

ZYP40R塑料模具钢电渣重熔工艺实践

介绍了 ZYP40R模具钢的电渣重熔生产工艺.通过电极坯母材原始铝含量控制、电渣重熔时采用返回渣系、重熔过程脱氧剂分阶段加入、全程氩气保护等方式有效保证电渣钢中的铝含量,生产出符合要求的自耗电极及电渣锭.     

振动电极电渣重熔过程建模与仿真

针对电渣重熔生产过程的高能耗问题,在传统电渣重熔系统的基础上,提出了振动电极电渣重熔方法以提高熔化效率。并以振动电极电渣重熔方法的试验数据为基础,建立了基于数据驱动的样条变换非线性偏最小二乘回归数学模型。通过Matlab仿真和试验结果分析,与无振动情况相比,该方法能有效地提高熔化效率,同时验证了该模型的有效性。     

核电用大型钢锭电渣重熔工艺模拟及生产应用

论证了应用于核电主管道和12%Cr 转子钢用百吨级巨型电渣钢锭重熔过程数学模型,形成电渣重熔工艺过程三维数值模拟计算程序ESR3D.模拟了电渣重熔全过程,包括电极熔化,金属熔滴自由下落,金属熔池的形成,金属熔池和渣池的上升、移动,三组电极分别更换,在线安装上结晶器,钢锭在水冷结晶器中凝固等.模拟并优化的电渣重熔工艺应用于生产80～120t大型电渣钢锭,其质量满足核电和超超临界火电机组技术要求.     

电渣重熔辊坯用钢点状偏析形成过程及其过程控制

MC5、MC6高碳高铬钢电渣重熔辊坯探伤结果出现点状偏析不合。通过对过程操作及检验数据进行分析,认为主要原因在于金属电极状态和电极熔化过程控制不稳定。     

REMOVAL OF NON-METALLIC INCLUSION FROM ALLOY 0Cr25A15 BY ELECTROSLAG REMELTING

<正> 非金属夹杂物影响Fe-Cr-Al电热合金的使用寿命,KANTHALA-1合金在1200℃下使用寿命为300h,其夹杂物金相评级为1.5;国产0Cr25A15合金在相同温度下使用只达180h,夹杂物金相评级为3.5级。电渣重熔0Cr25A15合金过程中非金属夹杂物的变化规律与许多因素有关,本试验在电制度不变的条件下着重研究渣制度和添加剂的影响,从而寻求降低合金中非金属夹杂物和提高使用寿命的途径。 试验采用100kg三相有衬电渣炉和单相电渣重熔炉双联冶炼工艺,主要工作在单相电渣炉上进行,结晶器内径为110—130mm,锭重20kg。 在锻材中部取样做化学分析和非金属夹杂物金相鉴定。再把锻材加工成直径0.8长340mm     

电渣重熔振动电极方法研究

介绍一种电渣重熔振动电极方法,从理论上分析了该方法的技术优势并进行了初步试验验证。结果表明：在同等试验条件下,振动电极方法比传统电渣重熔过程平均节能10％以上,并且电渣锭凝固质量更好。     

具有发展潜力的电渣冶金技术

为了提高铸锭质量,降低生产成本,电渣冶金涌现出许多新的技术,介绍了几种具有发展潜力的国内外电渣冶金新技术,包括弧渣重熔、洁净钢形核铸造、单极电渣快速重熔、双极电渣连铸、旋转电极重熔技术和液态金属电渣冶金技术。     

Effect of vibrating electrode on temperature profiles,fluid flow,and pool shape in ESR system based on a comprehensive coupled model

The vibrating electrode method was proposed in the electro-slag remelting(ESR) process in this paper,and the effect of vibrating electrode on the solidification structure of ingot was studied.A transient threedimensional(3D) coupled mathematical model was established to simulate the electromagnetic phenomenon,fluid flow as well as pool shape in the ESR process with the vibrating electrode.The finite element volume method is developed to solve the electromagnetic field using ANSYS mechanical APDL software.Moreover,the electromagnetic force and Joule heating are interpolated as the source term of the momentum and energy equations.The multi-physical fields have been investigated and compared between the traditional electrode and the vibrating electrode in the ESR process.The results show that the drop process of metal droplets with the traditional electrode is scattered randomly.However,the drop process of metal droplets with the vibrating electrode is periodic.The highest temperature of slag layer with the vibrating electrode is higher than that with the traditional electrode,which can increase the melting rate due to the enhanced heat transfer in the vicinity of the electrode tip.The results also show that when the amplitude and frequency of the vibrating electrode increase,the cycle of drop process of metal droplets decreases significantly.     

Effects of electrode immersion depth and remelting rate on electroslag remelting process

In the electroslag remelting process, the electrode molten state is a critical factor determining the ingot quality, while the electrode immersion depth and melting rate are key factors for the stability of the electroslag re-melting process. Studies were carried out to investigate the microscopic and macroscopic effects of electrode immersion depth and melting rate on the potential distribution and heat density in the slag bath, and on the depth and shape of the molten bath. Based on the finite element method and the numerical solution method, the effect of the electrode immersion depth on the slag bath heat density was researched; the relationship between the electrode immersion depth and the slag resistance was obtained; and the unsteady-state model of the solidification process of the re-melting ingot was solved using the finite difference method. The mathematical model and physical model of the electrode melting process were established and solved; and the corresponding curves between the electrode molten-state and slag-bath physical parameters were obtained. The experimental results verified the simulated results studied in this paper.     

电渣重熔高压锅炉管用钢化学成分变化规律的探讨

通过大量数据的统计及回归分析,探讨了２０Ｇ,１５ＣｒＭｏＧ,１２Ｃｒ１ＭｏＶＧ高压锅炉管用钢电渣重熔前后化学成分的变化规律,并由此推导出２０Ｇ,１５ＣｒＭｏＧ,１２Ｃｒ１ＭｏＶＧ高压锅炉管用钢电渣重熔前后元素含量变化的近似计算公式。用该近似计算公式可确定自耗电极元素含量的控制范围。