小型电渣重熔连续交替自动进给系统设计与开发

小型电渣重熔自动连铸系统将自耗电极采用两套螺母丝杠传动副交替传送,每套传动副上固定有钳式夹持器,整个系统采用西门子S7-200系列CPU214 PLC进行PID自动控制,可以实现自耗电极的自动交替的连续进给。通过实际应用表明：该系统具有稳定可靠,电极进给平稳,熔铸电流稳定。通过使用特殊模具,亦可以熔铸出复杂的电渣熔铸件。     

竖向钢筋电渣压力焊技术在工程中的应用

结合桃李苑小区采用竖向钢筋电渣压力焊技术的成功经验，对其焊接原理、焊接工艺流程、焊接技术数据的确定等内容作了介绍，总结了几点应注意的质量问题。     

电渣熔铸曲轴自动成型控制系统研究

电渣熔铸是20世纪末的前沿学科，它可将金属的合成、精炼、凝固成型集中于一道工序，所制工件材质纯净，成分均匀，综合性能优良。阐述了电渣熔铸曲轴成型的原理、对自动控制的要求及实现协调控制的方法。电渣熔铸曲轴一步成型所生产的曲轴起载能力强，可靠性高，是高性能柴油机、船舶柴油机曲线生产的发展方向。     

五金铝合金压铸模失效分析选材与强化处理研究

本文就提高电风扇、电视机、洗衣机、电热锅等五金铝合金压铸模使用寿命，进行了失效分析，试验表明，选用4Cr5MoSivi（H13）电渣钢进行强化处理，充分发挥特种铸造工艺优越性，与原3Cr2W8V电炉制该模常规处理工艺比，消除了早中期失效，寿命提高3～4倍，被誉为寿星模。     

工艺参数对电渣感应连续定向凝固组织稳定性的影响

电渣感应连续定向凝固组织稳定性主要取决于结晶器壁内温度与金属熔体的温度梯度，工艺参数的相互配合是获得理想凝固组织的关键；固液界面形状可用其形状因子Ｘ＝１０＾－４ψＢＴＸＣ／（ａＶ）来表示，利用Ｘ可实现对凝固过程中固液界面形状进行监测 。     

Calcinations of slags for electroslag remelting

The hydrides in industrial lime, alumina, magnesia and calcium fluoride were investigated through differential thermal analysis, X-ray diffraction. The characteristic of losing weight during heating up for them had been studied by thermogravimetric analysis method. Results indicate that industrial alumina, lime, magnesia, which have more moisture or hydride mainly including γ-Al2O3, Ca (OH)2 and Mg(OH)2, and losing weight more during thermogravimetric analysis process. However, the weight of premelted slag consisting of lime, fluorite, alumina and magnesia lose almost nothing, which means no hydride in it. Some relationship for calculating the weight loss process had been established according to results of thermogravimetric analysis. These results will be in favor of setting up the rational calcination criterion for slag used in electroslag remelting process.     

Effect on the chemical activity of flux on the properties of deposited metal in electroslag welding and remelting

The effect of the chemical activity of flux on the properties of deposited metal of Mn–Ni–Mo–V steels, produced by electroslag welding and electroslag remelting, is discussed. It is shown that an increase in the chemical activity of flux by increasing its silica content to 16–24% (FTs-21 flux) in the remelted metal increases the fraction of easily deformed non-metallic oxide inclusions and the number of zones with reduced hardness in the structure of the metal. This increases the elasticity properties and strain capacity of the metal in the process of relaxation of welding stresses and in the formation of the required mechanical properties of the welded joints after final heat treatment. Also, the risk of formation of reheat cracks in the electroslag welded joints is reduced.     

Mn18Cr18N高氮奥氏体不锈钢的冶炼工艺

为了研究Mn18Cr18N高氮奥氏体不锈钢的冶炼工艺,采用加压感应炉+保护气氛电渣重熔工艺进行Mn18Cr18N高氮奥氏体不锈钢的冶炼工艺试验,冶炼过程中采用氮化合金与加压氮气渗入相结合的方法增氮。结果表明,随着氮气分压的增加,钢中氮质量分数随之增大;当冶炼过程中氮气分压提高0.03 MPa时,能够成功抑制皮下气泡的生产;试验钢经保护气氛电渣重熔后,钢中夹杂物会普遍降低,主要为细小的方形TiN夹杂。     

Φ315mm双极串联电渣锭崩块夹渣的控制

分析了Φ315mm双极串联电渣锭发生崩块夹渣的原因，通过采取电极棒热重熔和电极棒埋砂缓冷等工艺措施，大幅度减少了电渣锭崩块夹渣缺陷。     

电渣重熔体系内磁场的数学模拟

基于Ｍａｘｗｅｌｌ方程组及电磁场理论，提出电渣重熔体系内磁场的数学模型，并应用于结晶器直径２００ｍｍ，电极直径７６ｍｍ，重熔电流３０００Ａ，以ＣａＦ２＋３０％Ａｌ２Ｏ３＋２０％ＣａＯ系熔渣重熔的低碳低合金钢的重熔过程。结果表明：沿电极端部锥角形成的方向，磁场强度不断增加，在接近锥端处达最大值。计算得到的重熔体系内的磁场分布与实测结果较相吻合。该模型可作为研究电渣重熔体系的流场及温度场的基础。